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2015-2-1 · Granular anionic polyacrylamide (PAM) was tested to reduce post-fire soil erosion. • PAM increased runoff in the 1st storm due to changes in runoff and soil solution viscosities. • This effect was reversed after one drying cycle. • The application of PAM reduced soil loss in three consecutive storms. •
Get Price2020-10-29 · In this regard, anionic polyacrylamide (PAM)/superabsorbent polyacrylamide hydrogel (SPH) can provide applicable management in order to decrease runoff and may inhibit release of nutrients including P (Sojka et al. 2007) by improving soil mechanical and physical characteristics (Wang et …
Get Price2018-9-7 · The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as in soil …
Get Price2021-3-18 · The addition of PAM and other soil amendments also stabilizes soil structure, maintains air infiltration of soil, and increases soil saturated hydraulic conductivity 17.
Get Price2014-6-19 · The flocculation kinetics of anionic polyacrylamide in Kaolin suspensions has been investigated as a function of pH (4 ~ 9), soil-water NaCl (0.5~10 mg·L −1) and soil organic matter (0.05 ~ 0.25 g·L −1). Essential factors, such as PAM & soil-water pre-soaking time, the number of end-over-end inversion and PAM optimal dosage, were pre-determined through a preliminary study and they were fixed throughout the a series of flocculation …
Get Price2021-2-16 · However, high removal rates can be assumed due to complexation with divalent and polyvalent cations and sorption to activated sludge. For anionic polyacrylamide-based flocculants used in WWTPs, it was estimated that approx. 95% of the polymers are removed from the water during the flocculation step, while approx. 5% remain dissolved and are discharged with the WWTP effluent .
Get PriceAnother set of soil subsamples erals constitute an important soil category in tropical was used to study the effects of organic matter reduction from and subtropical agricultural regions of the world (e.g., the soil on sorption, at different pH levels. Soil was treated with hydrogen peroxide (H2O2) based on methods presented Brazil, Australia, India, China, Central Africa, the south- by Jackson (1958) and Black (1965).
Get Price2017-9-1 · Community-based Soil and Water Conservation (SWC) practices have been adopted in the Tigray region since 1991 for restoration of the degraded landscape. The effects of those conservation measures on physico-chemical properties of soil were limitedly studied. Thus, this study evaluated the effects of SWC on selected soil properties in the Middle ...
Get Price2015-2-1 · Granular anionic polyacrylamide (PAM) was tested to reduce post-fire soil erosion. •. PAM increased runoff in the 1st storm due to changes in runoff and soil solution viscosities. •. This effect was reversed after one drying cycle. •. The application of PAM reduced soil loss in three consecutive storms. •.
Get Price2021-5-3 · This study aims to investigate the effects of polyacrylamide (PAM) alone or integrated with other soil amendments on soil fertility and Teff (Eragrostis tef (Zucc.) Trotter) yield. A field experiment was carried out for 2 years in three contrasting agroecological zones of the Upper Blue Nile basin, Ethiopia, using a randomized complete block design with 3 replicates.
Get PriceLiterature on Agricultural, Horticultural, and Medial Uses of Polyacrylamide Gels Compiled by Dr. Linda Chalker-Scott, Ph.D. Associate Professor and Extension Urban Horticulturist, WSU Puyallup Research and Extension Center Cross-linked PAM Hydrogel Effects on Plants Abbey, T. and T. Rathier. 2005. Effects of mycorrhizal fungi, biostimulants and water absorbing polymers on the growth and ...
Get Price2021-2-16 · Because of their usually high molecular weight, polymers are generally considered as being of low environmental concern and are, therefore, exempted from registration and evaluation within REACH. This exemption is currently being reviewed by the European Commission. Against this background, data on the environmental fate and effects of selected water-soluble synthetic organic …
Get PriceGreen, V.S. and Stott, D.E. (2001) Polyacrylamide: A review of the use, effectiveness, and cost of a soil erosion control amendment. Proceeding of the 10th International Soil Conservation Organization Meeting, West Lafayette, 24-29 May 2001, 384-389
Get PriceCalcigel bentonite-polyacrylamide (PAA) composites were investigated for their formation characteristics and their macroscopic hydro-mechanical and microscopic structural properties. The composites prepared were different in terms of the polymer charge, i.e. cationic (PAA + ), anionic (PAA − ), non-ionic (PAA o) and in terms of the polymer-to ...
Get Price2003-7-12 · Lack of proper techniques to isolate black carbon (BC) from soils has hindered the understanding of their roles in the sorption and environmental fate of organic contaminants in soils and sediments. The burning of crop residues may be the primary source of BC in agricultural soils. In this study, wheat (Triticum aestivum L.) and rice (Oryza sativa L.) residues were burned, and the resulting ...
Get Price2021-3-5 · 1. Introduction. Vanadium (V) is the fifth most abundant element in the Earth’s crust and has been extensively mined in Russia, South Africa, North America, and China (Imtiaz et al., 2015a).In the environment, V can occur in various valence states (e.g., −3, −1, 0, +2, +3, +4, and +5), of which V(V) is the most common (Gan et al., 2020a).Low levels of V can act as a growth promoting ...
Get Price2006-10-11 · Charcoal derived from the partial combustion of vegetation is ubiquitous in soils and sediments and can potentially sequester organic contaminants. To examine the role of charcoal in the sorption and desorption behaviors of diuron pesticide in soil, synthetic charcoals were produced through carbonization of red gum (Eucalyptus spp.) wood chips at 450 and 850 °C (referred to as charcoals …
Get Price2015-2-1 · Granular anionic polyacrylamide (PAM) was tested to reduce post-fire soil erosion. •. PAM increased runoff in the 1st storm due to changes in runoff and soil solution viscosities. •. This effect was reversed after one drying cycle. •. The application of PAM reduced soil loss in three consecutive storms. •.
Get Price2018-9-7 · The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as in soil …
Get Price2021-3-18 · Soil water status is an important factor affecting vegetation restoration, and soil water transport is affected by soil texture, bulk density, and pore distribution. Under natural conditions, iron tailings water transport capacity is lower than that of cropland soil 9 , and the air infiltration is poor, which seriously inhibits plant root growth.
Get Price2021-5-3 · This study aims to investigate the effects of polyacrylamide (PAM) alone or integrated with other soil amendments on soil fertility and Teff (Eragrostis tef (Zucc.) Trotter) yield. A field experiment was carried out for 2 years in three contrasting agroecological zones of the Upper Blue Nile basin, Ethiopia, using a randomized complete block design with 3 replicates.
Get Price2015-9-7 · Polyacrylamide (PAM) is known as one of soil conditioner that functions to stabilize soil structure, increase infiltration, and reduce surface runoff. This study assesses the effects of PAM on the vertical movement of soil-water and major/minor nutrients (NO3-N, …
Get PriceLiterature on Agricultural, Horticultural, and Medial Uses of Polyacrylamide Gels Compiled by Dr. Linda Chalker-Scott, Ph.D. Associate Professor and Extension Urban Horticulturist, WSU Puyallup Research and Extension Center Cross-linked PAM Hydrogel Effects on Plants Abbey, T. and T. Rathier. 2005. Effects of mycorrhizal fungi, biostimulants and water absorbing polymers on the growth and ...
Get Price2021-6-13 · 1 Title: Transfer and degradation of polyacrylamide based flocculants in hydrosystems: a review 2 3 Authors: A. G. Guezennec1, C. Michel1, K.Bru1, S. Touze1, N. Desroche2, I. Mnif3, M. Motelica-Heino4 4 1 BRGM 5 2 Nexidia SAS, 15 Rue de Mayence 21000 DIJON France 36 Université de Nice 7 4 ISTO, UMR 7327 CNRS-Université d’Orléans, 1A rue de la Férollerie, 45071 Orléans cedex 2
Get Price2021-2-16 · Because of their usually high molecular weight, polymers are generally considered as being of low environmental concern and are, therefore, exempted from registration and evaluation within REACH. This exemption is currently being reviewed by the European Commission. Against this background, data on the environmental fate and effects of selected water-soluble synthetic organic …
Get PriceAnionic polyacrylamide Polyacrylamide is, simply called PAM, a water- soluble high polymer and widely used in petroleum, paper-making, metallurgical, textile, chemical and environment protection fields. There are three categories of anionic, cationic and non-ionic type.
Get Price2018-3-27 · Polyacrylamide is not the only acrylamide unit, the acrylamide unit is mostly called polyacrylamide. Thus, polyacrylamide may contain structural units that can be ionized or hydrolyzed in water to carry charges. As a result, there are cationic, anionic, non-ionic, amphoteric ion type of various polyacrylamide anionic polyacrylamide
Get Price2018-4-25 · Anionic polyacrylamide is an ultra-high molecular weight polymer copolymerized by acrylamide and acrylate. It has a molecular weight of 18 million or more. It has strong adsorption and bridging efficiency. It can be used according to different uses …
Get PriceAnionic polyacrylamide (APAM) is a kind of polyacryl-amide (P AM) and sho ws electr one ga tive w hic h contains func-tional groups of sulfonic acid, phosphoric acid or carboxylic acid1. Due to more charge, the molecular chain of polymer can be more stretching in the water which will increase the
Get Price2021-7-8 · Uses of Sodium polyacrylate: 1. Sodium polyacrylate is a chemical polymer that is widely used in a variety of consumer products for its ability to absorb several hundred times its mass in water. Sodium polyacrylate is made up of multiple chains of acrylate compounds that possess a positive anionic charge, which attracts water-based molecules to
Get PriceCalcigel bentonite-polyacrylamide (PAA) composites were investigated for their formation characteristics and their macroscopic hydro-mechanical and microscopic structural properties. The composites prepared were different in terms of the polymer charge, i.e. cationic (PAA + ), anionic (PAA − ), non-ionic (PAA o) and in terms of the polymer-to ...
Get PriceEntry, J.A. and Sojka, R.E. and Hicks, B.J. (2008) Carbon and nitrogen stable isotope ratios can estimate anionic polyacrylamide degradation in soil. Geoderma. 145:8-16. Entry, James A. and Rygiewicz, Paul T. and Watrud, Lidia S. and Donnelly, Paula K. (2002) Influence of adverse soil conditions on the formation and function of Arbuscular ...
Get Price2003-7-12 · Lack of proper techniques to isolate black carbon (BC) from soils has hindered the understanding of their roles in the sorption and environmental fate of organic contaminants in soils and sediments. The burning of crop residues may be the primary source of BC in agricultural soils. In this study, wheat (Triticum aestivum L.) and rice (Oryza sativa L.) residues were burned, and the resulting ...
Get Price2020-7-4 · Biochar, carbon-rich materials produced during the thermochemical processing of biomass, are receiving increased attention given their potential value as soil amendments. Biochar are formed through pyrolysis processes—heating to several hundred degrees Celsius under oxygen-limited environments—and both the source feedstock and the reaction conditions affect the quality of the …
Get PriceA multilateral effort into managing nonpoint source pollution from agriculture has gotten much attention for many years. Particularly during the heavy rain season, run-off of turbid water from sloped farmlands, fallow ground and/or unmanaged uplands is deteriorated. Flocculant polymer, commonly used in wastewater treatment facilities, but now exploited to improve control of sediment turbidity ...
Get Price2021-3-12 · Hydraulic fracturing frequently occurs on agricultural land. Yet the extent of sorption, transformation, and interactions among the numerous organic frac fluid and oil and gas wastewater constituents upon environmental release is hardly known. Thus, this study aims to advance our current understanding of processes that control the environmental fate and toxicity of commonly used …
Get PriceRobbins, C.W. and Freeborn, L.L. and Westermann, D.T. (2000) Organic phosphorus source effects on calcareous soil phosphorus and organic carbon. Journal of Environmental Quality. 29:973-978. Entry, James A. and Sojka, R.E. (2000) The efficacy of polyacrylamide and related compounds to remove microorganisms and nutrients from animal wastewater.
Get PriceUses of polyacrylamide. One of the largest uses for polyacrylamide is to flocculate solids in a liquid. This process applies to water treatment, and processes like paper making and screen printing. Polyacrylamide can be supplied in a powder or liquid form, with the liquid form being subcategorized as solution and emulsion polymer. CAS Number ...
Get PriceA multilateral effort into managing nonpoint source pollution from agriculture has gotten much attention for many years. Particularly during the heavy rain season, run-off of turbid water from sloped farmlands, fallow ground and/or unmanaged uplands is deteriorated. Flocculant polymer, commonly used in wastewater treatment facilities, but now exploited to improve control of sediment turbidity ...
Get Price2009-8-17 · The influence of polyacrylamide application to soil on movement of microorganisms in water. Proceedings of the ASCE 1999 International Water Resources Engineering Conference, Seattle, WA, Aug. 8-11, 1999. Sojka, R.E., and J.A. Entry. 2000. Influence of polyacrylamide application to soil on movement of microorganisms in runoff water.
Get Price2021-3-12 · Hydraulic fracturing frequently occurs on agricultural land. Yet the extent of sorption, transformation, and interactions among the numerous organic frac fluid and oil and gas wastewater constituents upon environmental release is hardly known. Thus, this study aims to advance our current understanding of processes that control the environmental fate and toxicity of commonly used …
Get Price2019-3-7 · where ΔV—the difference in the base volume added to the suspension and the reference solution that leads to the specific pH value, c—the base concentration, F—the Faraday constant, m—the solid mass in the suspension, S—the solid surface area.. The examined systems were titrated by the NaOH solution with the concentration of 0.1 mol/L. At the beginning the reference curve was ...
Get PriceBååth, E. Effects of heavy metals in soil on microbial processes and populations (a review). Water Air Soil Pollut 1989, 47, 335–379. [Google Scholar] Eriksson, J.E. The effects of clay, organic matter and time on adsorption and plant uptake of cadmium added to the soil. Water Air Soil Pollut 1988, 40, 359–373. [Google Scholar]
Get PriceLentz, R.D. (2006) Solute response to changing nutrient loads in soil and walled ceramic cup samplers under continuous extraction. Journal of Environmental Quality. 35:1863-1872. Ippolito, J.A. and Novak M, J and Busscher, W.J. and Ahmedna, M. and Rehrah, D. and Watts, D.W. (2012) Switchgrass Biochar Effects Two Aridisols. Journal of ...
Get Price2021-7-13 · Title:Research Progress of Natural Polymers in Wastewater Treatment VOLUME: 16 ISSUE: 4 Author(s):Xiang Li*, Baojun Yang, Li Feng, Huaili Zheng, Guoming Zeng and Pei Wu Affiliation:School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, Chongqing Huashu Robotics Co., Ltd., Chongqing 400714, School of Construction, …
Get Price2009-8-17 · The influence of polyacrylamide application to soil on movement of microorganisms in water. Proceedings of the ASCE 1999 International Water Resources Engineering Conference, Seattle, WA, Aug. 8-11, 1999. Sojka, R.E., and J.A. Entry. 2000. Influence of polyacrylamide application to soil on movement of microorganisms in runoff water.
Get Price2007-5-1 · Effects of PAM Application Method and Electrolyte Source on Runoff and Erosion J.R. Peterson, D.C. Flanagan, J.K. Tishmack1 Abstract Previous research has indicated that polyacrylamide (PAM) soil amendments can be effective in reducing runoff volume and soil erosion by reducing soil sealing and stabilizing soil structure. Furthermore, the
Get Price2005-11-1 · Terry RE, Nelson SD (1986) Effects of polyacrylamide and irrigation method on soil physical properties. Soil Science 141, 317-320. Theng BKG (1982) Clay-polymer interactions: summary and perspectives. Clays and Clay Minerals 30, 1-10.
Get Price2019-10-25 · sorption experiments. Specifically, the soil pH was determined in a 1:1 (v/v) soil/water suspension using both deionized water and a 0.01 M CaCl. 2. solution. Soil organic matter was determined using the loss-on-ignition method (22). Exchangeable acidity was determined by extraction with a barium chloride/triethanolamine solution, buffered at
Get Price2021-5-21 · Anionic polyacrylamide for Municipal Sewage Treatment. Polyacrylamide Polyscrylamide brief name PAM, so-called flocculant or coagulate, and includes cation and anion, the molecular weight is between 400-18,000,000, it looks like white or t light yellow powder, liquidity is in the form of being no color dense colloid, dissolved in water
Get PriceLehrsch, G.A. and Lentz, R.D. and Kincaid, D.C. (2005) Polymer and sprinkler droplet energy effects on sugar beet emergence, soil penetration resistance, and aggregate stability. Plant and Soil. 273:1-13. Lentz, R.D. (2015) Polyacrylamide and biopolymer effects on flocculation, aggregate stability, and water seepage in a silt loam. Geoderma.
Get PriceA multilateral effort into managing nonpoint source pollution from agriculture has gotten much attention for many years. Particularly during the heavy rain season, run-off of turbid water from sloped farmlands, fallow ground and/or unmanaged uplands is deteriorated. Flocculant polymer, commonly used in wastewater treatment facilities, but now exploited to improve control of sediment turbidity ...
Get Price2015-5-7 · Indaziflam, a broad-spectrum, pre-emergence herbicide was the focus of a field investigation conducted after the identification of sporadic injury symptoms on the pecan trees a few months after the application. The study was conducted in two pecan orchards located in southern New Mexico, USA, and southeastern Arizona, USA. The objectives of this study were to evaluate the occurrence and ...
Get PriceAmerican Society of Agronomy Crop Science Society of America Soil Science Society of America Certified Crop Advisers. Log In My Account. We are currently upgrading our membership renewal system. If you have any trouble joining or renewing your membership, please contact us at [email protected] or 608-273-8080 for assistance. ...
Get PriceImpact of agricultural land use in Central Asia: a review. 2016-01-07· Agriculture is major sector in the economy of Central Asia. The sustainable use of agricultural land is therefore essential to economic growth, human well-being, social equity, and ecosystem services.
Get PriceSoil represents a likely candidate for an environmental reservoir because (1) oral exposure appears important in the natural transmission of scrapie and CWD; (2) accumulation of the infectious agent in gut-associated lymphatic tissue at early stages of infection argues for alimentary shedding [recently demonstrated for saliva (Mathiason et al ...
Get Price1997-6-30 · Adsorption and oxidation reactions of arsenite (As(III)) at the mineral−water interface are two important factors affecting the fate and transport of arsenic in the environ ment. Numerous studies have concluded that As(III) is more soluble and mobile than arsenate (As(V)) in soils, though very little experimental work has demonstrated the differences in reactivity and stability of As(III ...
Get Price'Hydrocarbon Pollution: Effects on Living Organisms, Remediation of Contaminated Environments, and Effects of Heavy Metals Co-Contamination on Bioremediation'. In 'Introduction to Enhanced Oil Recovery (EOR) Processes and Bioremediation of Oil-Contaminated Sites'
Get Price2016-10-2 · Bond RD (1960) The occurrence of microbial filaments in soils and their effect on some soil properties. CSIRO Division of Soils, Division Report 10/60, Adelaide, Australia. Bond RD (1962) Effects of micro-organisms on some physical properties of soils. In ‘CSIRO 3rd Australian Soil Science Conference’.
Get PriceIn Africa, conversion of natural ecosystems to agricultural lands is the most common land use Received in revised form change. ... Y.S. Ok, Y. Kuzyakov, Effects of polyacrylamide, soil depth in most of the land use types in Mt. Kilimanjaro (Fig. 7). ... Integrated pest management of coffee weight organic substances out-competes sorption in soil ...
Get PriceAcidithiobacillus ferrooxidans Recovery of Metals from Printed Circuit Boards (PCBs) Using a Combination of Hydrometallurgical and Biometallurgical Processes [Volume 10, Issue 4, 2016, Pages 511-518]; Adsorption Decolorization of Basic Textile Dyes using a Novel Adsorbent Modification Method: Ultrasonic-Acid Modification [Volume 10, Issue 1, 2016, Pages 31-40]
Get Price2019-12-12 · The sorption of lead(II) onto pine cone powder (PCP) and 0.15 mol/L NaOH treated pine cone powder (PCP 0.15), an abundant agricultural waste from the wood industry, was studied to evaluate the effect of NaOH treatment on the kinetics of lead(II) uptake by performing batch kinetic sorption experiments. Batch biosorption kinetics was performed by varying biosorbent dose and initial lead(II ...
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