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2021-1-1 · Study on optimal conditions of poly ferric chloride (PFC) dosage treating tannery wastewater Author links open overlay panel Thanh Tran a b c Duc Anh Le a b d Nguyen Hong Hai a b c Tran Phi Hung a e Nguyen Cong Danh a e Lam Van Tan a f Vo Thi Dieu Hien e Xuan-Thanh Bui b c g
Get PriceStudy on optimal conditions of poly ferric chloride (PFC) dosage treating tannery wastewater ... China Leather. 4 (2010 ... most widespread industries in the Aegean Region and its pollution loads ...
Get Price2021-1-28 · The current study investigated the efficiency of poly ferric chloride (PFC) and poly titanium tetrachloride (PTC) in coagulation-flocculation process for treatment of paper and cardboard wastewater. The effect of pH (5–11), coagulant concentrations (100–1000 mg/L), mixing rate (10–60 rpm), mixing time (5–25 min), and settling time (5–30 min) were examined.
Get PricePoly-aluminum chloride (PACl) is one of the common coagulants for water and wastewater treatment. A new Chinese national standard of PACl has been implemented, where the concentration of insoluble ...
Get Price2017-11-1 · The aim of this study was to evaluate and compare of PolyDADMAC with ferric chloride as a coagulant on the removal of turbidity, Coliform and Organic matter from Ahvaz drinking water. Materials and Methods: This study was carried out in a lab scale and using a …
Get Price2017-2-1 · Optimal design and characterization of sulfide-modified nanoscale zerovalent iron for diclofenac removal ... In this study, sulfidation was adopted to enhance diclofenac (DCF, an emerging groundwater pollutant) removal under aerobic conditions in the presence of common anions. ... 85%), anhydrous ferric chloride (FeCl 3, 99.9%), sodium ...
Get PriceHigh-poly-aluminum chloride sulfate (HPACS) coagulants with different [SO4²⁻]/[Al³⁺] molar ratio (S) were prepared and proved to have high coagulation efficiency for the removal of humic ...
Get Price2005-7-8 · This is a two-part work on the chemistry of iron(III) as coagulant in the treatment of cork processing wastewater. The main aim of the first part was to determine the removal of organic matter as measured by reductions in chemical oxygen demand (COD), polyphenols (P), and aromatic compounds (A) that can be obtained using this physicochemical process.
Get Price2020-11-18 · Ferric chloride (FeCl3) has widespread use as an etchant in the PCB industry and for photochemical machining. Although the corrosion process of copper in …
Get Price2018-12-12 · In this study, the Esterification wastewater was treated by three kinds of flocculants (poly aluminum chloride (PAC), polymeric ferric sulfate (PFS), poly aluminum ferric chloride (PAFC)), the influences of flocculent concentration, temperature and pH on …
Get Price2019-5-25 · The optimal conditions found for the settling process were not the same as those that had been determined in the first part of the study for the elimination of organic matter. Finally, taking into account economic and practical reasons, the Talmadge−Fitch method is used to apply the results to the design of a clarifier−thickener unit to ...
Get Price2020-11-17 · Regarding the aim of our study, the experiment was divided into two phases. Batch tests were applied to select an optimal chemical coagulant from polyalumin-ium chloride (PAC), polyaluminium ferric chloride (PAFC), poly ferric sulfate (PFS) (individual or couple with poly acrylamide [PAM]) during the first phase. At the second
Get Price2018-1-17 · Gonocytes give rise to spermatogonial stem cells, and thereby play an essential role in establishing spermatogenesis. Optimized culture conditions for gonocytes provide an opportunity for their study and in vitro manipulation for potential application in reproductive technologies. Using six experiments in a step-wise design, we examined the effects of several culture conditions on the ...
Get Price2020-11-18 · Ferric chloride (FeCl3) has widespread use as an etchant in the PCB industry and for photochemical machining. Although the corrosion process of copper in …
Get Price2016-1-1 · In what follows, we present a detailed study of the three stages of spore ejection (§§3.1–3.3) and use this quantitative information to evaluate how optimal the design of the catapult is (Discussion). The details of the models and the refilling dynamics of the …
Get Price2020-8-20 · In this study, it was found that the response surface methodology can be used to find the optimal conditions of the system, taking into account the variables affecting the response. Additional tests were performed to make better use of the optimal treatment. 3.2 Properties of fermented extract in optimum conditions 3.2.1 Antimicrobial properties
Get Price2020-7-3 · The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic-lipophilic groups, long-chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to changes in properties of dispersion and water retention as well …
Get Price2020-12-10 · Intravenous iron is often used to treat iron deficiency anaemia in non-dialysis chronic kidney disease (ND-CKD), but the optimal dosing regimen remains unclear. We evaluated the impact of high- versus low-dose intravenous iron isomaltoside on the probability of retreatment with intravenous iron in iron-deficient ND-CKD patients. This real-world, prospective, observational study collected data ...
Get Price2020-10-6 · Iron is an essential element for plants and abundantly present in most mineral soils. The mobility of iron is, however, dependent on the redox potential and hydrogen activity (pH) of the soil, factors that may limit its availability to plants in particular at alkaline pHs. Iron deficiency triggers pronounced changes in the transcriptional profile of plants, inducing processes that aid in the ...
Get Price2019-6-1 · At optimal operating conditions of Fe:P (w/w) ratio = 2.40, pH = 6.48 and FMS = 100 rev min − 1, 97.85% removal of phosphorus was achieved. Moreover, compared with the one-off dosage, the three-step process treatment can save 50% of the cost in terms of ferric chloride when treating the same amount of distillery effluent.
Get Price2021-1-10 · [20] was used to determine the optimal conditions for degrading fenvalerate by strain CY-012. With single fac-tor tests and the Plackett–Burman (PB) experimental design, three selected factors that significantly affected the fenvalerate degradation activity of strain CY-012 were represented at suboptimal (1), optimal (0) and
Get Price2018-10-17 · Chemicals. Poly-aluminum chloride (Al 2 (OH) n Cl 6−n.YH 2 O, Al 2 O 3 = 30%wt, basicity = 65% and pH = 3) was used as a coagulant and anionic (A 300), cationic (C 270) and nonionic polymers, as the coagulant aids were provided from AquaTech Company, Switzerland.. Preparation of solution. In order to prepare a 10 percent clear solution for coagulant, 10 g of PAC was dissolved to 100 mL of ...
Get Price2020-7-3 · The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic-lipophilic groups, long-chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to changes in properties of dispersion and water retention as well …
Get Price2021-7-1 · Under flow conditions, high (1,000 ppm) and low (5 ppm) chlorine concentrations failed to produce an appreciable reduction in E. coli levels (0.37 log 10 and 0.44 log 10, respectively).
Get Price2020-9-15 · Chemical electro-osmosis with an injected saline solution can be described as an efficient method for adjusting the soil microstructure and improving soil conductivity, and the effect of electro-osmotic consolidation on soft foundations can also be improved by this novel technology in regard to foundation treatment. To better study the electro-osmotic characteristics of soft clay from Taizhou ...
Get Price2020-12-10 · Optimization of spherical integrity by the Taguchi method. Calcium alginate microcarriers were prepared by the Taguchi method (Supplementary …
Get Price2021-3-16 · In order to address freshwater scarcity, seawater desalination technologies have been widely studied in recent years. However, the disposal of desalination brine which contains an even higher concentration of salts than seawater can potentially damage the surrounding environment. Therefore, alternative approaches aiming to recover valuable resources from desalination brine have been …
Get PriceDredging sea mud produced during the coastal infrastructure construction has been gradually becoming an environmental problem in China. Making ceramsite is an attractive way to convert the waste sea mud to resources used for many industrial sectors. However, the imapct of preheating and sintering conditions on the ceramsite properties and the biofilm formation capacity of the ceramsite are ...
Get Price2021-1-10 · Optimization of fenvalerate-degradation conditions RSM based on the Box–Behnken experimental design [20] was used to determine the optimal conditions for degrading fenvalerate by strain CY-012. With single fac-tor tests and the Plackett–Burman (PB) experimental design, three selected factors that significantly affected
Get Priceprocedure was investigated by one-factor experimental design and central composite design (CCD) successively. Under optimal conditions, the proposed method manifest good recoveries in the range of 82.36–93.82% and high precision (relative standard deviations below 5%). The enrichment factors for the analytes changed from 91 to 97.
Get Price2016-1-12 · Results. In this study, we developed a process for high-optical-purity d-lactate production using an engineered alkaliphilic Bacillus strain. First, the native l-lactate dehydrogenase gene (ldh) was knocked out, and the d-lactate dehydrogenase gene from Lactobacillus delbrueckii was introduced to construct a d-lactate producer.The key gene responsible for exopolysaccharide biosynthesis (epsD ...
Get Price2021-6-23 · were purchased from Sinopharm Chemical Reagent Co., Ltd. (China). Sodium hydroxide (NaOH) is of analytical grade and was purchased from Nanjing Chemical Reagent Co., Ltd. (China). Copper chloride (CuCl2 2H2O) is analytically pure and was purchased from Nanjing Shengjian Quanhua Glass Instrument Co., Ltd. (China). High purity nitrogen
Get PriceThe ultrasound-assisted extraction (UAE) was initially applied to extract gallic acid from Suaeda glauca Bge. using 70% ethanol as extraction solvent. Temperature, liquid-solid ratio, and extraction time were optimized by response surface methodology (RSM), obtaining maximum levels of gallic acid (6.30 mg·g −1 ) at 51°C, 19.52 mL·g−1, and 42.68 min, respectively.
Get Price2019-12-4 · Response surface methodology (RSM) approach was used for optimization of the process parameters and identifying the optimal conditions for the removal of …
Get Price2006-5-3 · The physical properties of natural organic matter (NOM) flocs, such as size, growth rate, and strength, were investigated using a laser diffraction particle sizing device. Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated a link between zeta potential and coagulation and flocculation performance, with the production ...
Get Price2020-6-3 · Smelting slag is a typical hazardous waste generated in the smelting and metallurgy industry 1,2.Slag contains high concentrations of heavy metals, such as Cu, Zn, Cr and Ni, which are harmful if ...
Get Price2014-7-9 · The reaction mixture contained 1 mM DMPD, 0.1 mM ferric chloride in acetate buffer 0.1 M (pH 5.25) in a total volume of 1 mL. The assay temperature was 25°C. The reaction was monitored at 505 nm until absorbance became stable at a value of 0.900 ± 0.100. Samples were dissolved in H 2 O at a concentration of 20 mg/mL. According to the method ...
Get Price2018-6-28 · Microalgal biomass harvesting using traditional chemicals is costly for the production of biofuels, hindering the scale-up process of the technology. Thus, the search for a cost-effective microalgal harvesting method is extremely important. Using chitosan as a natural flocculant to harvest microalgal biomass seems to be an efficient and convenient solution.
Get Price2016-1-12 · Results. In this study, we developed a process for high-optical-purity d-lactate production using an engineered alkaliphilic Bacillus strain. First, the native l-lactate dehydrogenase gene (ldh) was knocked out, and the d-lactate dehydrogenase gene from Lactobacillus delbrueckii was introduced to construct a d-lactate producer.The key gene responsible for exopolysaccharide biosynthesis (epsD ...
Get Price2019-12-4 · Response surface methodology (RSM) approach was used for optimization of the process parameters and identifying the optimal conditions for the removal of …
Get Price2021-6-23 · were purchased from Sinopharm Chemical Reagent Co., Ltd. (China). Sodium hydroxide (NaOH) is of analytical grade and was purchased from Nanjing Chemical Reagent Co., Ltd. (China). Copper chloride (CuCl2 2H2O) is analytically pure and was purchased from Nanjing Shengjian Quanhua Glass Instrument Co., Ltd. (China). High purity nitrogen
Get Price2021-3-12 · Extraction of high-purity phosphate (P) from source-separated urine has attracted growing interest, given its potential economic and environmental benefits. In this study, we present an innovative strategy for selectively separating P from synthetic urine containing a high concentration of Cl–, simply by adjusting the charging and discharging processes of a flow-electrode capacitive ...
Get Price2020-10-28 · With the optimized fermentation medium and conditions, the γ-PGA production reached a maximum concentration of 42.55 g/L, and a high productivity of 1.15 g/(L·h). In this formula, FA powder is essential, because the medium without FA powder had a much lower production of γ-PGA which was only 2.87 g/L in the broth.
Get Price2021-3-16 · Groundwater treatment sludge is a Fe/Mn-rich waste generated in mass production in a groundwater treatment plant for potable water production. The conventional disposal of sludge, such as direct discharge into river/lake, sea, and landfill, is not environmentally sustainable. Herein, a novel method was proposed to effectively separate Fe/Al and recover Mn via a combined hydrochloric acid ...
Get PriceThe microalga Dunaliella salina is the best commercial source of natural β-carotene. Additionally, different species of Dunaliella can accumulate significant amounts of valuable fine chemicals such as carotenoids, glycerol, lipids, vitamins, minerals and proteins. They also have a large potential for biotechnological processes such as expressing of foreign proteins and treatment of wastewater.
Get Price2019-1-17 · The research community is intent on harnessing increasingly complex biological building blocks. At present, cells represent a highly functional component for integration into higher order systems. In this review, we discuss the current application space for cellular coating technologies and emphasize the relationship between the target application and coating design.
Get Price2021-6-10 · Scalable and biological production of nacre-like high-performance materials remains challenging. Yu et al. produce a self-assembling 3D moldable material with a layered microstructure. The material shows high toughness values, making it suitable …
Get PriceThe aim of the present EFFECT-HF study (Effect of Ferric Carboxymaltose on Exercise Capacity in Patients ... Study Design The EFFECT-HF study was a prospective randomized con-trolled, multicenter, open-label trial with blinded end-point ... diluted in 100 mL of sterile 0.9% sodium chloride solution
Get Price2015-3-10 · Determination of the Optimal Dose of Ephedrine in Intraoperative Arterial Hypotension of Newborns and Infants up to 6 Months of Age. A Randomized, Controlled, Open-label, Dose Escalation Study. Actual Study Start Date : June 2015: Actual Primary Completion Date : September 5, 2020: Actual Study Completion Date : September 5, 2020
Get PriceDear Distinguished Authors and Guests, We are pleased to present the proceedings from the 2 nd International Conference on Mechanical Engineering and Applied Composite Materials (MEACM2018), which was held on December 7-8, 2018 in Harbin, China. MEACM2018 aims to present the latest research and results of scientists (professors, students, PhD ...
Get Price2019-4-5 · However, in this case, the optimal pH for a mixture of HS + COM (pH 5.0–6.2) related to optimal pH ranges for the coagulation of HS (5.0–6.0) and COM peptides/proteins (5.0–6.7). The impact on coagulation of interactions between AOM and other impurities present in raw water are detailed by Pivokonský et al..
Get Price2013-3-13 · Fluoride is a persistent and non-biodegradable pollutant that accumulates in soil, plants, wildlife and in human beings. Therefore, knowledge of its removal, using best technique with optimum efficiency is needed. The present survey highlights on efficacy of different materials for the removal of fluoride from water. The most important results of extensive studies on various key factors (pH ...
Get Price2018-4-10 · It is a major challenge in catalysis to uncover structure–performance relationships that drive the design and optimization of high-performance/low-cost catalysts. When one considers the number of potential elemental combinations for catalysts and then includes variables, such as particle size and elemental stoichiometry, the number of possibilities is daunting.
Get PriceThe microalga Dunaliella salina is the best commercial source of natural β-carotene. Additionally, different species of Dunaliella can accumulate significant amounts of valuable fine chemicals such as carotenoids, glycerol, lipids, vitamins, minerals and proteins. They also have a large potential for biotechnological processes such as expressing of foreign proteins and treatment of wastewater.
Get PriceHe moved to China University of Petroleum (East China) in 2018 and now he is a professor there. His research interests focus on the design and controlled synthesis of carbon nanomaterials such as carbon nanotubes and graphene, and their applications in energy related areas such as supercapacitors, Li ion batteries and full cells.
Get Price2020-3-6 · The ability to grow safe, fresh food to supplement packaged foods of astronauts in space has been an important goal for NASA. Food crops grown in space experience different environmental conditions than plants grown on Earth (e.g., reduced gravity, elevated radiation levels). To study the effects of space conditions, red romaine lettuce, Lactuca sativa cv ‘Outredgeous,’ plants were grown ...
Get Price2014-9-8 · The hydration with sodium chloride was set 12 hours before the procedure (before contrast exposure during coronary angiography), continued for the duration of the procedure, and for 12 hours post-procedure at the speed of 1ml/kg/hr (0.5ml/kg/hr for patients with congestive heart failure, New York Heart Association class III or LVEF<35%).
Get Price2016-3-1 · conditions that may occur during the life of the pipe. Both AWWA M55 PE Pipe—Design and Installation and AWWA M23 PVC Pipe—Design and Installation employ this type of analysis method. The magnitude of the pressure surge caused by sudden changes in the velocity of the flow in a …
Get Price2021-7-3 · Full Article. Optimization of Selective Acid Hydrolysis of Cellulose for Microcrystalline Cellulose using FeCl 3. Jinbao Li, a,b, * Xiangrong Zhang, a, * Meiyun Zhang, a Huijuan Xiu, a and Hang He a,b In the process of acid hydrolysis of cellulose, hydrolyzing the amorphous regions while retaining the crystalline regions is the key technology for obtaining microcrystalline cellulose products.
Get Pricea 25 ml volumetric flask. Then ferric chloride solution (0.5 ml, 0.10 mol/L), potassium ferricyanide solution (0.5 ml, 0.008 mol/L), and hydrochloric acid solution (0.5 ml, 0.10 mol/L) were added, respectively. The mix-ture was finally diluted with ethanol (60%) to a defined volume (25 …
Get Price2018-4-10 · It is a major challenge in catalysis to uncover structure–performance relationships that drive the design and optimization of high-performance/low-cost catalysts. When one considers the number of potential elemental combinations for catalysts and then includes variables, such as particle size and elemental stoichiometry, the number of possibilities is daunting.
Get Price2020-9-18 · Further investigation showed that high tray temperatures in the bottom of the column minimized any reduction in the kinetic rate for CO 2 absorption. Due to heats of reaction, bottom tray temperatures were raised 30-40C above the gas feed temperatures, creating near equilibrium conditions. The top section of the absorber was mostly
Get Price2015-1-2 · With these conditions, high-purity product samples were successfully prepared for 54 of the 96 functionality-rich substrate combinations (Fig. 1C and table S4) when run on a 500-μmol scale (~25 mg) (25, 26). This chemistry was generally tolerant of polar functional groups and heterocycles; however, nearly half of the 96 reactions failed to ...
Get Price2018-7-24 · A bicarbonate-based integrated carbon capture and algae production system (BICCAPS) uses carbonate to capture CO2 and produce bicarbonate for alkalihalophilic microalgal cultivation. In this process, carbonate is regenerated and re-used for CO2 capture. However, a practical example of a recycling culture to prove its feasibility is still absent.
Get Price2020-2-11 · The change regulations of the smelting parameters in a gas-injection blast furnace are investigated using theoretical calculations. The results show that when the volume of gas injected, the oxygen enrichment rate and the theoretical combustion temperature of tuyere are 600 m 3 /tHM, 10% and 1950~2200 ∘ C, respectively, the conditions meet the smelting requirements of a blast furnace. With ...
Get Pricehigh stiffness prevent the stripping of all but very minor undercuts. Shrinkage The linear mold shrinkage of injection molded parts will vary from 0.008 to 0.025 inches per inch, depending on the particular resin, molding conditions, part design, part wall thickness, and direction of …
Get Pricea 25 ml volumetric flask. Then ferric chloride solution (0.5 ml, 0.10 mol/L), potassium ferricyanide solution (0.5 ml, 0.008 mol/L), and hydrochloric acid solution (0.5 ml, 0.10 mol/L) were added, respectively. The mix-ture was finally diluted with ethanol (60%) to a defined volume (25 …
Get Price2018-10-24 · An experiment and simulation study of the effect of using liquid additives on the selective non-catalytic reduction (SNCR) process is presented, providing a novel way for plants reducing NO X emissions. An experimental study is conducted in an entrained flow reactor, and CHEMKIN is applied for simulation study.
Get PriceIn fact, compared with the complicated and high-cost nanostructure or hierarchical fabrication of Si-based materials, developing high-performance polymer binders for Si-based anodes, especially the low-cost, safe, and environmentally friendly aqueous binders, also represents a cost-effective approach to improve the cycling performance of Si ...
Get Price2019-4-11 · High moisture content in organic wastes leads to a leachate production. Vegetable waste is one kind of municipal solid organic wastes holding very high moisture (88–94%) and thus becoming nuisance to the environment. Composting is a viable technology to treat such organic waste. This research mainly deals with the insight on physic state of composting during composting of vegetable …
Get Price2021-7-2 · Manufacturer of soluble anhydrous and powder calcium chloride. Available in colorless or white crystal form and in 99.9% purity. Physical properties of anhydrous calcium chloride include 1935 degrees C boiling point, 772 degrees C melting point and …
Get PriceMustafa Mohammad and Shaden Haddad https://www.jocpr.com/articles/synthesis-of-novel-quinazolinone123triazole-conjugates.pdf
Get Price2021-5-7 · 2. Biodegradability of Polymers. With the awareness of the problem of accumulating plastic waste, the polymers used began to be classified into four categories, taking into account their biodegradability and the feedstock for their production (Table 1) [].Plastics can be produced either from renewable resources and the monomers of plant, microbial or animal nature, or from fossil resources ...
Get Price2016-8-26 · Under the optimal conditions of a pulse duty cycle of 0.3, current density of 35 mA/cm 2, pulse frequency of 3.0 kHz, electrode distance of 1.0 cm, and reaction time of 40 min, the removal efficiencies of chemical oxygen demand (COD), oils and greases, turbidity, total suspended solids, and polyacrylamide reach 98.3, 99.0, 98.8, 98.1 and 94.3% ...
Get Price2014-6-7 · The design of the target is depicted in Figure 1. A semi-automated target loading and unloading system was utilized as described in our previous study . In this study, 30-min irradiations were performed with 1.7 M solutions of 68 Zn nitrate (99.23% isotopic enrichment) in 0.2 N nitric acid. The proton beam current was 20 μA.
Get Price2021-5-12 · To optimize the major UAE conditions that affecting the yield of ZNC, RSM was employed under CCD mode. The concentrations of ZNC used in the design matrix are shown in Table 1, and the model that can be used to navigate the design space was further analyzed using Design Expert 12.0.3.0 software (trial version). The model was as follows:
Get PriceObjective Iron supplementation in iron-deficiency anaemia is standard practice, but the benefits of iron supplementation in iron-deficient non-anaemic (IDNA) individuals remains controversial. Our objective is to identify the effects of iron therapy on fatigue and physical capacity in IDNA adults. Design Systematic review and meta-analysis of randomised controlled trials (RCTs).
Get Price2008-7-2 · institute of physics, chemistry and biology master thesis development of cleaning-in-place procedures for protein a chromatography resins using design of experiments and high throughput screening technologies hanna tengliden master thesis performed at ge healthcare february 22nd 2008 lith-ifm-ex-08/1923—se linkÖping university, institute of physics, chemistry and biology, 581 83 linkÖping
Get Price2016-3-14 · In order to maximize the production of biologically-derived chemicals, kinetic analyses are first necessary for predicting the role of enzyme components and coordinating enzymes in the same reaction system. Precorrin-2 is a key precursor of cobalamin and siroheme synthesis. In this study, we sought to optimize the concentrations of several molecules involved in precorrin-2 synthesis in vitro ...
Get Price2011-12-2 · In this study, Magnesium powder of 98.5% purity with a size range of 30–100 nm obtained from Merck KGaA, Germany, was used as the matrix material. Hydroxyapatite (HA) nanopowder of 99.0% purity with a size of around 50 nm obtained from Sigma Aldrich Corporation, USA, was used as …
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