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Biodegradation for hydrolyzed polyacrylamide in the anaerobic baffled reactor combined aeration tank. Highlights•HPAM removal efficiency was evaluated by multiple testing means.•Molecular weight of products was about 1/5000 of the original HPAM molecular weight.•Reduction of TOC proved HPAM can be utilized as C-source by microorganisms.•Reduction of amide group …
Get PriceBiodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system. PAM biodegradation has been studied by some researchers at present, but the results seem contradictory. the content of acrylamide as a monomer and toxic derivatives was studied and shown in Fig. 4. Get Price
Get Price2017-5-4 · Although polyacrylamide (PAM) and its derivatives have many useful applications, their release in nature can have impacts on the environment and human health, thus bioremediation approaches for residual PAM are urgently needed. Biodegradation of PAM and its derivatives has been studied only in the last two decades, with most emphasis on acrylamide biodegradation.
Get Price2015-11-1 · Hydrolyzed polyacrylamide (HPAM), which is extensively used for oil extraction in an oilfield, produces waste water that enters the groundwater system posing a threat to the safety of plants and animals. Among the many methods to removal the HPAM, the biodegradation based screened bacteria and sludge is an efficient method.
Get Price2020-1-15 · Polyacrylamide (PAM), particularly high molecular PAM (>10 7 Dal), with a viscosity of over 58 centipoise (cp), has been increasingly used for enhanced oil recovery in oilfields ().Produced water generated during enhanced oil recovery contains high concentration of PAM, which should be removed before discharge (Yan et al. 2016).There have been a lot of studies …
Get Price2018-3-26 · Biodegradation of HPAM by microbes may be an efficient way to solve those problems. Microbial biodegradation is considered an environmentally friendly safe technique. The isolation of microbes that are able to degrade HPAM from the oil field produced water was investigated in …
Get Price2019-4-1 · Biodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then used as a nitrogen source for growth by the microbes. The carbon backbone, polyacrylate, is more recalcitrant to biodegradation than the amide moieties.
Get PriceHot Sale Free Sample Polyacrylamide CAS 9003-05-8 with Best Price. FOB Price: US 20-90 kg. Min. Order: 1 kg. CAS No.: 9003-05-8. Formula: C3h5no. EINECS: 231-545-4. Type: Pharmaceutical Intermediates. Appearance: Powder. Quality: Technical.
Get Price2018-9-7 · He, Q. & Dong, B. Biodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system. Bioresour. Technol. 153 , 55–61 (2014).
Get PriceBiodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then …
Get PriceBiodegradation of low molecular weight polyacrylamide. Polyacrylamide (PAM), particularly high molecular PAM (>10 7 Dal), with a viscosity of over 58 centipoise (cp), has been increasingly used for enhanced oil recovery in oilfields ().Produced water generated during enhanced oil recovery contains high concentration of PAM, which should be removed before discharge (Yan et al. …
Get PriceTY - JOUR. T1 - Biodegradation of Polyacrylamide and Its Derivatives. AU - Joshi, Sanket J. AU - Abed, Raeid M.M. PY - 2017/6/1. Y1 - 2017/6/1. N2 - Although polyacrylamide (PAM) and its derivatives have many useful applications, their release in nature can have impacts on the environment and human health, thus bioremediation approaches for residual PAM are urgently …
Get PriceBiodegradation of hydrolyzed polyacrylamide by the combined expanded granular sludge bed reactor-aerobic biofilm reactor biosystem and key microorganisms involved in this bioprocess Author links open overlay panel Tianwen Song a b Shanshan Li a b Wande Ding a b Haoshuai Li a b Mutai Bao a b Yang Li c a
Get PricePolyacrylamide (PAM), a linear water soluble polymeric compound with high molecular weight, is extensively used for oil production in China. Compared with the physico-chemical degradation of PAM, there is no acrylamide monomer, which causes peripheral neuropathy, released in the process of biodegradation. Unfortunately, few microorganisms have been isolated which can degrade PAM.
Get PriceBiodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism. Author links open overlay panel Tianwen Song a b Shanshan Li a b Yifeng Lu c Dong Yan a b Peiyan Sun d Mutai Bao …
Get PriceWater-soluble polyacrylamide is commercially available in different domains of industry, such as water purified, paper making, pharmacy, agriculture and oil exploitation. Especially polyacrylamide is used for polymer displacement, which can enhance oil recovery through increasing the sweeping efficiency. Good economic effects are achieved by the industrial application of polymer in various …
Get PriceBiodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then …
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Get Price2021-5-22 · Acrylamide Monomer Of Polyacrylamide - Buy Acrylamide,Acrylamide Monomer,Polyacrylamide Product on Alibaba. Appearance: White crystal powder 2,USAGE: Acrylamide can be used for polymer and co-polymer as flocculant, mud conditioner, blocking agent, mineral dressing agent, textile treatment agent, intensifier and water treatment agent.
Get Price2013-1-1 · Biodegradation. Share . Facebook. ... yet nowhere to find it for sale. Any help would be much appreciated. ... I am trying to understand the osmotic pressure exhibited by …
Get PriceBiodegradation for hydrolyzed polyacrylamide in the anaerobic baffled reactor combined aeration tank. Highlights•HPAM removal efficiency was evaluated by multiple testing means.•Molecular weight of products was about 1/5000 of the original HPAM molecular weight.•Reduction of TOC proved HPAM can be utilized as C-source by microorganisms.•Reduction of amide group …
Get PriceBiodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system. PAM biodegradation has been studied by some researchers at present, but the results seem contradictory. the content of acrylamide as a monomer and toxic derivatives was studied and shown in Fig. 4. Get Price
Get Price2017-5-4 · Although polyacrylamide (PAM) and its derivatives have many useful applications, their release in nature can have impacts on the environment and human health, thus bioremediation approaches for residual PAM are urgently needed. Biodegradation of PAM and its derivatives has been studied only in the last two decades, with most emphasis on acrylamide biodegradation.
Get Price2015-11-1 · Hydrolyzed polyacrylamide (HPAM), which is extensively used for oil extraction in an oilfield, produces waste water that enters the groundwater system posing a threat to the safety of plants and animals. Among the many methods to removal the HPAM, the biodegradation based screened bacteria and sludge is an efficient method.
Get Price2020-1-15 · Polyacrylamide (PAM), particularly high molecular PAM (>10 7 Dal), with a viscosity of over 58 centipoise (cp), has been increasingly used for enhanced oil recovery in oilfields ().Produced water generated during enhanced oil recovery contains high concentration of PAM, which should be removed before discharge (Yan et al. 2016).There have been a lot of studies …
Get Price2018-3-26 · Biodegradation of HPAM by microbes may be an efficient way to solve those problems. Microbial biodegradation is considered an environmentally friendly safe technique. The isolation of microbes that are able to degrade HPAM from the oil field produced water was investigated in …
Get Price2019-4-1 · Biodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then used as a nitrogen source for growth by the microbes. The carbon backbone, polyacrylate, is more recalcitrant to biodegradation than the amide moieties.
Get PriceHot Sale Free Sample Polyacrylamide CAS 9003-05-8 with Best Price. FOB Price: US 20-90 kg. Min. Order: 1 kg. CAS No.: 9003-05-8. Formula: C3h5no. EINECS: 231-545-4. Type: Pharmaceutical Intermediates. Appearance: Powder. Quality: Technical.
Get Price2018-9-7 · He, Q. & Dong, B. Biodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system. Bioresour. Technol. 153 , 55–61 (2014).
Get PriceBiodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then …
Get PriceBiodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system. PAM biodegradation has been studied by some researchers at present, but the results seem contradictory. the content of acrylamide as a monomer and toxic derivatives was studied and shown in Fig. 4.
Get PriceBiodegradation of partially hydrolyzed polyacrylamide hpam using bacteria isolated from omani oil fields. Society of Petroleum Engineers - SPE EOR Conference at Oil and Gas West Asia 2018. Vol. 2018-March Society of Petroleum Engineers, 2018.
Get PricePartially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil-water separation, degrades naturally to produce toxic acrylamide and endanger local ecosystem. Biodegradation of HPAM may be an efficient way to solve these problems. The biodegradability of HPAM in an aerobic …
Get PricePartially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil-water separation, degrades naturally to produce toxic acrylamide and endanger local ecosystem. Biodegradation of HPAM may be an efficient way to solve these problems. The biodegradability of HPAM in an aerobic …
Get PriceAbstract Hydrolyzed polyacrylamide (HPAM), which is extensively used for oil extraction in an oilfield, produces waste water that enters the groundwater system posing a threat to the safety of plants and animals. Among the many methods to removal the HPAM, the biodegradation based screened bacteria and sludge is an efficient method. Combined anaerobic and aerobic biological …
Get Price2016-3-29 · The special function bacteria R2 was screened from hydrolyzed polyacrylamide (HPAM)-containing wastewater that could use HPAM as the sole carbon source and nitrogen source. Through optimizing the condition of HPAM biodegradation, the removal rate of R2 free strain reached to 41.6% when pH was 7, temperature was 35°C, inoculation quantity (v/v ...
Get PriceThe biodegradation of polyacrylamide (PAM) includes the hydrolysis of amino groups and cleavage of the carbon chain; however, the effect of molecular weight on the biodegradation needs further investigations. In this study, biodegradation of low molecular weight PAM (1.6 × 10 6 Da) was eva …
Get PriceBiodegradation of hydrolyzed polyacrylamide by the Hydrolyzed polyacrylamide (HPAM) is widely used to EOR in many oilfields, and it is generally accepted as a nontoxic polymer. However, under certain physical or chemical conditions, it may degrade and produce acrylamide (AM), which exhibits toxicity to nervous system and damages human health ...
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Get Price2016-9-1 · The special function bacteria R2 was screened from hydrolyzed polyacrylamide (HPAM)‐containing wastewater that could use HPAM as the sole carbon source and nitrogen source. Through optimizing the condition of HPAM biodegradation, the removal rate of R2 free strain reached to 41.6% when pH was 7, temperature was 35°C, inoculation quantity (v/v) was …
Get PriceHydrolyzed polyacrylamide (HPAM), which is extensively used for oil extraction in an oilfield, produces waste water that enters the groundwater system posing a threat to the safety of plants and animals. Among the many methods to removal the HPAM, the biodegradation based screened bacteria and sludge is an efficient method. Combined anaerobic and aerobic biological processes …
Get Price2006-1-1 · Phanerochaete chrysosporium was introduced into biodegradation of polyacrylamide(PAM), and effects of glucose amount, pH, N concentration, Mn2+ concentration and biodegradation time on biodegradation of PAM were studied. Results show that Phanerochaete chrysosporium has special abilities of enzyme catalysis biodegradation of PAM.
Get Price2019-5-18 · Biodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism. Tianwen Song Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao, 266100, China; College of Chemistry and ...
Get PricePolyacrylamide PAM, with the chemical formula of (C3H5NO)n and the CAS NO. of 9003-05-8, is a linear polymer. Polyacrylamide polymer has good thermal stability, can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid. PAM is one of the most widely used water-soluble polymers.
Get Price2001-5-16 · Electrophoretic channels are filled with a polymer matrix prior to their use in DNA separations. This process, called gel-loading, can be accomplished manually, using syringes, or can be automated through the use of small pumps or vacuum. The injection rate is constrained by the desire to minimize shear-induced degradation of the polymer molecules. Currently, the …
Get PriceBiodegradation of polyacrylamide by bacteria isolated from. Mar 15, 2010· Polyacrylamide (PAM), a linear water soluble polymeric compound with high molecular weight, is extensively used for oil production in China. Compared with the physico-chemical degradation of PAM, there is no acrylamide monomer, which causes peripheral neuropathy, released in
Get PricePolyacrylamide (IUPAC poly(2-propenamide) or poly(1-carbamoylethylene), abbreviated as PAM) is a polymer (-CH 2 CHCONH 2-) formed from acrylamide subunits. It can be synthesized as a simple linear-chain structure or cross-linked, typically using N,N '-methylenebisacrylamide.In the cross-linked form, the possibility of the monomer being present ...
Get PriceBiodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism Song, Tianwen Li, Shanshan
Get Price2014-9-26 · The aim of this review was to summarize information and scientific data from the literature dedicated to the fate of polyacrylamide (PAM)-based flocculants in hydrosystems. Flocculants, usually composed of PAMs, are widely used in several industrial fields, particularly in minerals extraction, to enhance solid/liquid separation in water containing suspended matter.
Get Price2019-12-12 · We describe here the development of multifunctional nanocarriers, based on amine-functionalized biodegradable polyacrylamide nanoparticles (NPs), for cancer theranostics, including active tumor targeting, fluorescence imaging, and photodynamic therapy. The structural design involves adding primary amino groups and biodegradable cross-linkers during the NP …
Get PricePolyacrylamide. Polyacrylamide production process: Acrylamide aqueous solution is used as a raw material, and polymerization reaction is performed under the action of an initiator. The polyacrylamide gel block generated after the reaction is cut, cut, granulated, dried, and pulverized. According to ionic characteristics, it can be divided into four types: non-ionic, anionic, cationic …
Get Price2021-3-12 · Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field. Journal of …
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Get Price2020-9-24 · Combination of biochar and immobilized bacteria accelerates polyacrylamide biodegradation in soil by both bio-augmentation and bio-stimulation strategies. 1 Coronavirus: Find the latest articles and preprints
Get Price2021-7-5 · Polyacrylamide (PAM) Effective pH value: 1.0~14.0. Polyacrylamide (PAM) is a linear organic polymer, and it is the most widely used flocculant in water treatment chemicals. It can enhance flocculation, reduce the cost of clean water, improve water quality, and remove organic matter and algae in the water.
Get PricePayne WJ, Fitzgerald JW and Dodgson KS (1974) Methods for visualization of enzymes in Polyacrylamide gels. Appl. Microbiol. 27: 154–158. PubMed Google Scholar Quick A, Hales S, Russell NJ and White GF (1993) Desulphonation of a secondary alkane sulphonate: bacterial biodegradation of sulphosuccinate.
Get PriceBiodegradation of partially hydrolyzed polyacrylamide hpam using bacteria isolated from omani oil fields Walaa Al-Moqbali, Sanket J. Joshi, Saif Al-Bahry , Yahya Al-Wahaibi , Abdulkadir Elshafie , H.E. Dr. Ali AL-Bimani , Abdul-Aziz M. Al-Hashmi , Sathish Babu Soundra Pandian
Get Price2009-8-6 · PREMRAJ & DOBLE: BIODEGRADATION OF POLYMERS 189 water-soluble polymers, such as polyacrylamide and polyacrylic acid. Among the vinyl polymers produced industrially, PVA is the only one known to be mineralized by microorganisms. PVA is water-soluble and biodegradable and hence, used to make water-soluble and biodegradable carriers, which may be
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Get Price2015-7-1 · Biodegradation of such chemicals by microorganisms may provide an cost-effective method for their detoxification. We have investigated the degradation of cypermethrin by immobilized cells of Micrococcus sp. strain CPN 1 in various matrices such as, polyurethane foam (PUF), polyacrylamide, sodium alginate and agar.
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Get PricePayne WJ, Fitzgerald JW and Dodgson KS (1974) Methods for visualization of enzymes in Polyacrylamide gels. Appl. Microbiol. 27: 154–158. PubMed Google Scholar Quick A, Hales S, Russell NJ and White GF (1993) Desulphonation of a secondary alkane sulphonate: bacterial biodegradation of sulphosuccinate.
Get Price2019-5-25 · Preparation and Biodegradation of Sugar-Containing Poly(vinyl acetate) Emulsions. Macromolecular Bioscience 2008 , 8 (2) , 193-198. DOI: 10.1002/mabi.200700126.
Get Price2021-6-2 · Polyacrylamide Knowledge . 1. What is polyacrylamide PAM? Polyacrylamide is a polymer (-CH2CHCONH2-) formed from acrylamide subunits, it is long-chain polymer (same molecule repeating itself many times) designed to attract either positively charged particles (organic materials, such as carbon or human waste) or negatively charged particles (inert …
Get Price2012-12-19 · Biodegradation of butachlor by Rhodococcus sp. strain B1 and purification of its hydrolase (ChlH) responsible for N-dealkylation of chloroacetamide herbicides. Liu HM(1), Cao L, Lu P, Ni H, Li YX, Yan X, Hong Q, Li SP. Author information: (1)College of Life Science, Nanjing Agriculture University, Nanjing, People's Republic of China.
Get PriceAdsorption onto granular activated carbon (GAC) is an established technology in water and advanced wastewater treatment for the removal of organic substances from the liquid phase. Besides adsorption, the removal of particulate matter by filtration and biodegradation of organic substances in GAC contactors has frequently been reported. Get Price
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Get Price2021-5-24 · Biodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism 领域 化学 食品科学 抗氧化剂 废水 尿素酶 水解 聚丙烯酰胺 生物降解 采出水 巨芽孢杆菌
Get Price2021-5-23 · Biodegradation of partially hydrolyzed polyacrylamide by immobilized bacteria isolated from HPAM‐containing wastewater - Liu - 2016. The special function bacteria R2 was screened from hydrolyzed polyacrylamide (HPAM)‐containing wastewater that could use HPAM as the sole carbon source and nitrogen source.
Get Price2021-5-22 · Acrylamide Monomer Of Polyacrylamide - Buy Acrylamide,Acrylamide Monomer,Polyacrylamide Product on Alibaba. Appearance: White crystal powder 2,USAGE: Acrylamide can be used for polymer and co-polymer as flocculant, mud conditioner, blocking agent, mineral dressing agent, textile treatment agent, intensifier and water treatment agent.
Get PricePolyacrylamide nonionic water-soluble polymer; CAS Number: 9003-05-8; Linear Formula: (C3H5NO)n; find Sigma-Aldrich-92560 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich
Get Price2021-6-13 · Carbios therefore exercised this agreement and notified SPI of its willingness to exercise the purchase option for a sale price of €17.9 million under the terms of the shareholders’ pact. This acquisition comes as part of the rationalization of the Company’s portfolio with a view to developing its biodegradation technologies beyond PLA ...
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Get Pricenoltrex™ is intended for use only by qualified medical personnel (in accordance with the law) as a synthetic implant material for intra-articular injection. Information for doctors. Introduce ™ into the joint cavity using the 18Gx1½ and 21Gx1½ needles included in the kit. In the presence of free fluid in the joint, it is desirable to ...
Get PricePolyacrylic is a high-molecular-weight composite of acryl and polyacrylamide, usually derived from a polyacrylamide gel. The IUPAC name for polyacrylamide is poly | acrylamide gel. They can also be homologs of acrylamide or substituted with an allyl ester of monomeric polymer, allylene, or propylene glycol.
Get PricePartially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil-water separation, degrades naturally to produce toxic acrylamide and endanger local ecosystem. Biodegradation of HPAM may be an efficient way to solve these problems. The biodegradability of HPAM in an aerobic …
Get PriceStudy on biodegradation of hydrolyzed polyacrylamide in polymer flooding produced wastewater Chang Fan1 Chen Li1 Chen Liang2 Tian Yingtian3 Chen Wuling1(1.Life Sciences Institute,Northwest University,Xi'an 710069,China;2.Bio-Engineering Institute,Henan Industrial University,Zhengzhou 450001,China;3.CNPC Changqing Oilfield Company No.1 Gas Plant ...
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Get PricePolyacrylamide (PAM) is a commercially relevant cationic polymer utilized mainly for water treatment due to its high efficiency and rapid dissolution. Being a cationic polymer, PAM can increase the settling rate of bacterial floc and improve the capture of dispersed bacterial cells, suspended solids, and cell fragments; therefore, one of its ...
Get PriceBiodegradation for hydrolyzed polyacrylamide in the anaerobic baffled reactor combined aeration tank Highlights•HPAM removal efficiency was evaluated by multiple testing means.•Molecular weight of products was about 1/5000 of the original HPAM molecular ...
Get Price2018-5-18 · Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils. To obtain detailed information on the polymer’s fate in the soil compartment, the …
Get PriceThe biodegradation of plasticizers has been previously shown to result in the accumulation of metabolites that are more toxic than the initial compound. The present work shows that the pattern of degradation of di-2-ethylhexyl adipate by Bacillus subtilis can be significantly altered by the presence of biosurfactants, such as surfactin, or ...
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