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2017-5-4 · Biodegradation of PAM and its derivatives has been studied only in the last two decades, with most emphasis on acrylamide biodegradation. Microorganisms have been shown to utilize, not only acrylamide, but also PAM and its derivatives as the sole source of nitrogen and/or carbon under aerobic as well as anaerobic conditions.
Get Price2011-3-1 · In the present work, we reported the isolation and characterization of a novel acrylamide-degrading bacterium from domestic wastewater in Chonburi, Thailand. The strain grew well in the presence of acrylamide as 0.5% (W/V), at pH 6.0 to 9.0 and 25°C.
Get PriceBiodegradation of PAM and its derivatives has been studied only in the last two decades, with most emphasis on acrylamide biodegradation. Microorganisms have been shown to utilize, not only acrylamide, but also PAM and its derivatives as the sole source of nitrogen and/or carbon under aerobic as well as anaerobic conditions.
Get Price2013-11-1 · Under aerobic conditions, acrylamide has been shown to be readily degraded in fresh water by bacteria, with a half-life of 55–70 h, after acclimatization for 33–50 h ( Conway et al., 1979 ). Half-lives in estuarine or salt water are slightly longer ( Croll et al., 1974 ).
Get Price2015-4-1 · Polyacrylamide (PAM) is a water-soluble polymer that is usually produced through the polymerization of acrylamide with one or more copolymers. The amide groups of PAM form hydrogen bonds in aqueous solutions, and high-molecular-weight PAM is an effective flocculant of suspended solids in water via charge neutralization and interparticle bridging [ 1 ].
Get Price2014-9-26 · The biodegradation of PAM induced changes in the structure of the polymer (reduction of the molecular weight), but no evidence of release of AMD monomer has been found. Although amidases are involved in the mechanism of degradation of PAM, the reaction pathway for the microbial degradation of PAM is not clearly identified.
Get PricePolyacrylamide (PAM) is a water-soluble polymer that is widely used as a flocculant in sewage treatment. [...] Key Result. The efficiency of PAM degradation was 31.1% in 7 days and exceeded 45% under optimum culture condition (pH 7.2, 39 °C and 100 rpm). The addition of yeast extract and glucose improved the bacterial growth and PAM degradation.
Get Price2018-1-15 · Abstract. A pyrene-degrading microbial consortium was obtained after enrichment with mangrove sediment collected from Thailand. Five cultivable bacteria ( Mycobacterium spp. PO1 and PO2, Novosphingobium pentaromativorans PY1, Ochrobactrum sp. PW1, and Bacillus sp. FW1) were successfully isolated from the consortium.
Get Price2014-10-1 · Biodegradation of acrylamide and purification of acrylamidase from newly ... Biodegradation of acrylamide by Enterobacter aerogenes isolated from wastewater in Thailand. J. Environ. Sci., 23 (2011), pp. 396-403. Google Scholar ... Determination of acrylamide monomer in polyacrylamide degradation studies by high – performance liquid ...
Get Price2019-3-27 · Preparation of Polyacrylamide Grafted onto Magnetic Cellulose as Flocculant in Wastewater Pre-treatment ... However, the natural polymer is vulnerable to biodegradation as the . 01. Proceedings of the International Conference on Industrial Engineering and Operations Management ... Thailand…
Get Price2016-7-1 · Since degradation of polyacrylamide accompanied with accumulation of its toxic monomer is important to the disposition of biogas residues generically termed as “digestate” (Chu et al., 2003, Zhang et al., 2009, Duan et al., 2012,) biodegradation of polyacrylamide by anaerobic digestion under mesophilic conditions in a dewatered sludge ...
Get PricePolyacrylamide (PAM) is a water-soluble polymer that is widely used as a flocculant in sewage treatment. The accumulation of PAM affects the formation of dewatered sludge and potentially produces hazardous monomers. In the present study, the bacterial strain HI47 was isolated from dewatered sludge. This strain could metabolize PAM as its sole nutrient source and was subsequently identified as ...
Get Price2014-11-6 · Microbial diversity of the sample collection. Enumeration of the mesophilic aerobic flora was performed for the water and sludge samples collected from the water recycling system (Table 1).Although the make-up water (P1) showed the lowest microbial concentration (3.36 log CFU mL −1), the concentrations in the other water and sludge samples of the washing process were fairly similar with …
Get Price2018-1-15 · A pyrene-degrading microbial consortium was obtained after enrichment with mangrove sediment collected from Thailand. Five cultivable bacteria (Mycobacterium spp. PO1 and PO2, Novosphingobium pentaromativorans PY1, Ochrobactrum sp. PW1, and Bacillus sp. FW1) were successfully isolated from the consortium.Draft genomes of them showed that two different …
Get PriceBiodegradation 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 Price2016-9-29 · The biodegradation test in soil has to be finished after 24 months. The test procedure is described in ASTM D5988, ISO 17556 and ISO 11266. The certificate of biodegradation in soil can be obtained from Vincotte, Belgium, or DIN CERTCO, Germany. The certificate is required in Italy and Spain to obtain governmental support for biodegradable ...
Get Price2021-5-9 · where W d is the weight of the dried SAP and W s is the weight of the swollen sample.. Biological Degradation. The biodegradations of P(KA) and P(Am-co-KA) were carried out using a soil burial method (Sharma et al. 2014).Five samples (150 g each) of each swollen gel were separately put in a 14 × 14 cm linen bag and buried in the natural garden soil at a depth of 10 cm with a 3-cm spacing ...
Get PriceCitation: Buranasilp K, Charoenpanich J, 2011. Biodegradation of acrylamide by Enterobacter aerogenes isolated from wastewater in Thailand. Journal of Environmental Sciences, 23(3): 396–403. Introduction Acrylamide (CH2=CHCONH2) is an important monomer used as a conjugated reactive molecule in polyacrylamide production as well as a binding,
Get Price2019-3-27 · Preparation of Polyacrylamide Grafted onto Magnetic Cellulose as Flocculant in Wastewater Pre-treatment ... However, the natural polymer is vulnerable to biodegradation as the . 01. Proceedings of the International Conference on Industrial Engineering and Operations Management ... Thailand…
Get Price2020-8-27 · Keywords: Acrylamide, Biodegradation, Enterobacter aerogenes, 2D-PAGE, MALDI-TOF MS INTRODUCTION Acrylamide (CH 2=CHCONH 2) is used as a conjugated reactive molecule in polyacrylamide production as well as a binding, thickening or flocculating agent Doi: 10.12982/cmujns.2014.0016
Get Price2021-1-7 · Acrylamide biodegradation in wastewater by Enterobacter aerogenes was reported in Thailand (Buranasilp, K et al., 2011). Fig. 1 A Phylogenetic tree using neighbour-joining method C. Growth specific characterization of Enterobacter cloacae subsp. dissolvens strain TJ1812 Acrylamide biodegradation by Enterobacter cloacae subsp.
Get PriceThe present study examines an improved detoxification and rapid biological degradation of toxic pollutant acrylamide using a bacterium. The acrylamide degrading bacterium was isolated from the soil followed by its screening to know the acrylamide degrading capability. The minimal medium containing acrylamide (30 mM) served as a sole source of carbon and nitrogen for their active growth.
Get Price2021-5-9 · where W d is the weight of the dried SAP and W s is the weight of the swollen sample.. Biological Degradation. The biodegradations of P(KA) and P(Am-co-KA) were carried out using a soil burial method (Sharma et al. 2014).Five samples (150 g each) of each swollen gel were separately put in a 14 × 14 cm linen bag and buried in the natural garden soil at a depth of 10 cm with a 3-cm spacing ...
Get Pricepam flocculant anionic polyacrylamide apam for drilling | manufacturer of polyacrylamide for water treatment industrial. PHPA Polymer|PHPA anionic polyacrylamide(A2718) for oil drilling： White or yellow powder,non-toxic,non-corrosive,easily solubale in water,mainly used as a selective flocculant for non-dispersed,low solid phase water-based drilling fluid.it can
Get Price2020-10-28 · Ultimate biodegradation is obtained when the test substance degrades by 90 % of the reference material. Duration of the test depends on the ecosystem and could last a maximum of 6 months in (sea)water. 125 , 126 For soil 127 and marine sediment or seawater/sediment interface, 128 , 129 the maximum test period is 24 months.
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 c...
Get PriceThe microbial biodegradation of PAM has long been studied. Previous studies suggested that microorganisms are able to degraded and utilized PAM as a nitrogen source in both aerobic and anaerobic environments [13,14]. Microorganisms produce a polyacrylamide induced amidase to deaminate PAM .
Get PriceThe increasing usage of partially hydrolyzed polyacrylamide (HPAM) in oilfields as a flooding agent to enhance oil recovery at so large quantities is an ecological hazard to the subsurface ecosystem due to persistence and inertness. Biodegradation of HPAM is a potentially promising strategy for dealing with this problem among many other methods available.
Get Price2019-5-20 · Biodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense Chemosphere ( IF 5.778) Pub Date : 2019-05-18, DOI: Tianwen Song,Shanshan Li,Yifeng Lu,Dong Yan,Peiyan Sun,Mutai Bao,Yang Li
Get PriceThe increasing usage of partially hydrolyzed polyacrylamide (HPAM) in oilfields as a flooding agent to enhance oil recovery at so large quantities is an ecological hazard to the subsurface ecosystem due to persistence and inertness. Biodegradation of HPAM is a potentially promising strategy for dealing with this problem among many other methods available.
Get PriceBiodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field 【DOI】 10.1016/j.jhazmat.2010.08.011 【摘要】 Partially hydrolyzed polyacrylamide (HPAM) in production water after polymer ...
Get PriceThe research results of Li Daping of Chengdu Institute of Biology, Chinese Academy of Sciences show that under natural conditions, polyacrylamide will undergo slow physical degradation (heat, shear), chemical degradation (hydrolysis, oxidation and catalytic oxidation) and biodegradation, resulting in Various oligomers and highly toxic acrylamide monomers cause great indirect or direct harm to ...
Get PriceA PLA-degrading enzyme produced by the strain was purified to homogeneity shown by sodium dodecyl sulfate-polyacrylamide gel electrophoresis with specific activity of 38.3 unit/mg protein. The optimum pH and temperature were 10.0 and 70 masculineC, respectively, which are higher than previously reported among PLA-degrading enzyme.
Get Price' The sera of eighty-three healthy adult Thais from Northeast Thailand were examined by acrylamide gel electrophoresis. Stool examinations and haematological parameters were also done. ... Biodegradation - (XX700) ... polyacrylamide gel electrophoresis. Show more.
Get PriceDOI: 10.1007/s10532-013-9633-6 Corpus ID: 9249500. Acrylamide biodegradation ability and plant growth-promoting properties of Variovoraxboronicumulans CGMCC 4969 @article{Liu2013AcrylamideBA, title={Acrylamide biodegradation ability and plant growth-promoting properties of Variovoraxboronicumulans CGMCC 4969}, author={Z. Liu and Y. Cao and Qianwen Zhou and K. Guo …
Get PriceFig. 5 Time course of acrylamide biodegradation by resting cells of E. coli Rosetta pET28a-amidase and control cells lacking amidase gene. Overexpression of amidase and resting cell acrylamide transformation conditions described in Materials and methods section, OD600 of resting cell suspensions 5 - 'Acrylamide biodegradation ability and plant growth-promoting properties of ...
Get PriceORIGINAL ARTICLE Atrazine degradation by stable mixed cultures enriched from agricultural soil and their characterization S. Siripattanakul1,2, W. Wirojanagud3, J. McEvoy4, T. Limpiyakorn5 and E. Khan2 1 National Center of Excellence for Environmental and Hazardous Waste Management, Chulalongkorn University, Bangkok, Thailand
Get Price2012-5-14 · Anaerobic biodegradation of partially hydrolyzed polyacrylamide in long-term methanogenic enrichment cultures from production water of oil reservoirs. Hu H, Liu JF, Li CY, Yang SZ, Gu JD, Mu BZ. Biodegradation, 29(3):233-243, 03 Mar 2018 Cited by: 1 article | PMID: 29502248
Get PriceThe impact of inorganic N and P additions on a tropical soil contaminated with petroleum hydrocarbons was investigated using molecular and culture techniques. Microcosms were incubated for 42 days and sampled at 0, 1, 7, 28 and 42 days. Changes in bacterial community structure were determined using …
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Get PriceThe 280-kDa protein resembled the scaffolding proteins of cellulosomes based on its migratory behavior in polyacrylamide gels and as a glycoprotein. Cloning of the 40-kDa major xylanase subunit named Xyn11A revealed that Xyn11A contained two functional domains which belonged to glycosyl hydrolase family-11 and to carbohydrate-binding module ...
Get PriceBiodegradation of ethidium bromide by Bacillus thuringiensis isolated from soil. African Journal of Microbiology Research, 2013. Duangporn Kantachote
Get Price2015-5-28 · In 2011, Thailand witnessed the most enormous flood in its history, which devastated infrastructure, agriculture, industry, and society as a whole. The flood swept from the north of Chao Phraya River basin through Central Thailand during July 2011 to January 2012, submerging 60,000 square kilometers of land.
Get PriceThailand is a nation rich in biomass with rich capital in the plastics industry and with more than 4000 enterprises. The Thai government, in its pursuit of economic growth and sustainability, has recognized the bio-plastic industry as a strategic industrial sector since 2006 [2,5]. This led to the National Roadmap for Bioplastics development ...
Get PriceYou searched for: Journal International biodeterioration & biodegradation Remove constraint Journal: International biodeterioration & biodegradation Publication Year 2017 Remove constraint Publication Year: 2017 Source 2017 v.124 Remove constraint Source: 2017 v.124
Get Priceremoval of acrylamide. Kalyani Thakur. Release of acrylamide in environmentAcrylamide is a synthetic monomer with a broad spectrum of industrial applications, mainly as a precursor in the production of several polymers, such as polyacrylamide [1,19]. High molecular weight polymers can be modified to develop nonionic, anionic, or cationic ...
Get Price2021-1-7 · Waste not!This critical Review of the state of the art of biodegradable plastics covers the environmental and socio‐economic impact of plastics, government policies, standards and certifications, physico‐chemical properties, and analytical techniques, highlighting the potential of bioplastics, but also the challenges and barriers towards their commercialization.
Get Price2013-1-29 · A thermophilic Streptomyces thermoviolaceus subsp. thermoviolaceus isolate 76T-2 that can degrade poly(ε-caprolactone) (PCL) was isolated from soil in Taiwan. Isolate 76T-2 grew well in urea fructose oatmeal medium and exhibited clear zones on agar plates containing PCL, indicating the presence of extracellular PCL depolymerases. The PCL powder present in culture medium was …
Get PriceAbstract Interpenetrating polymer network (IPN) hydrogel based on crosslinked natural rubber (NR) latex and crosslink cassava starch (St) was successfully prepared by a solution blending technique. Crosslinked NR latex was firstly prepared in emulsion state at 70°C by using potassium persulfate as initiator and N, N’-methylene-bis-acrylamide (MBA) as crosslinker.
Get PriceBiodegradation of ethidium bromide by Bacillus thuringiensis isolated from soil. African Journal of Microbiology Research, 2013. Duangporn Kantachote
Get Price2020-9-25 · Industrialization, population burst, and changing lifestyles have resulted in the genesis of non-degradable pollutants languishing the environment and human health. Biological approaches using microorganisms are gaining importance as an eco-friendly and cost-effective substitute to mitigate the pollution load. Microorganisms can survive in a divergent environment and produce metabolites that ...
Get PriceTexas A&M University. Mar 2011 - Jul 20121 year 5 months. Doha, Qatar. My work was mainly concentrated on the formulation of best Alkali-Surfactant-Polymer (ASP) solution for Qatar oil field and development of possible ASP flooding code by mathematical modeling. My research work is also focused on interfacial surfactants on their interfacial ...
Get Price2013-1-29 · A thermophilic Streptomyces thermoviolaceus subsp. thermoviolaceus isolate 76T-2 that can degrade poly(ε-caprolactone) (PCL) was isolated from soil in Taiwan. Isolate 76T-2 grew well in urea fructose oatmeal medium and exhibited clear zones on agar plates containing PCL, indicating the presence of extracellular PCL depolymerases. The PCL powder present in culture medium was …
Get Price2015-5-28 · In 2011, Thailand witnessed the most enormous flood in its history, which devastated infrastructure, agriculture, industry, and society as a whole. The flood swept from the north of Chao Phraya River basin through Central Thailand during July 2011 to January 2012, submerging 60,000 square kilometers of land.
Get PriceAbstract Interpenetrating polymer network (IPN) hydrogel based on crosslinked natural rubber (NR) latex and crosslink cassava starch (St) was successfully prepared by a solution blending technique. Crosslinked NR latex was firstly prepared in emulsion state at 70°C by using potassium persulfate as initiator and N, N’-methylene-bis-acrylamide (MBA) as crosslinker.
Get Price2020-9-25 · Industrialization, population burst, and changing lifestyles have resulted in the genesis of non-degradable pollutants languishing the environment and human health. Biological approaches using microorganisms are gaining importance as an eco-friendly and cost-effective substitute to mitigate the pollution load. Microorganisms can survive in a divergent environment and produce metabolites that ...
Get PriceYou searched for: Journal International biodeterioration & biodegradation Remove constraint Journal: International biodeterioration & biodegradation Publication Year 2017 Remove constraint Publication Year: 2017 Source 2017 v.124 Remove constraint Source: 2017 v.124
Get Priceremoval of acrylamide. Kalyani Thakur. Release of acrylamide in environmentAcrylamide is a synthetic monomer with a broad spectrum of industrial applications, mainly as a precursor in the production of several polymers, such as polyacrylamide [1,19]. High molecular weight polymers can be modified to develop nonionic, anionic, or cationic ...
Get PriceThailand is a nation rich in biomass with rich capital in the plastics industry and with more than 4000 enterprises. The Thai government, in its pursuit of economic growth and sustainability, has recognized the bio-plastic industry as a strategic industrial sector since 2006 [2,5]. This led to the National Roadmap for Bioplastics development ...
Get Price2013-1-29 · A thermophilic Streptomyces thermoviolaceus subsp. thermoviolaceus isolate 76T-2 that can degrade poly(ε-caprolactone) (PCL) was isolated from soil in Taiwan. Isolate 76T-2 grew well in urea fructose oatmeal medium and exhibited clear zones on agar plates containing PCL, indicating the presence of extracellular PCL depolymerases.
Get Price2019-11-26 · Aerobic and anaerobic biodegradation potential of leachate from old active landfill G. Kalčíková, E. Tratar Pirc and A. Žgajnar Gotvajn (Ljubljana, Slovenia) ..... 8619 Full-scale hybrid constructed wetlands incorporated with an initial anaerobic stage
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