Just fill in the form below, click submit, you will get the price list, and we will contact you within one working day. Please also feel free to contact us via email or phone. (* is required).
2021-3-18 · Anionic PAM is widely used in cropland water retention, soil erosion control, and other soil management strategies 5,6,7,8 because of its low cost and stability, and because it is non-toxic and ...
Get PriceThe use of anionic polyacrylamide (PAM) as a soil conditioner could help prevent soil loss by water. In this study, we determined the effective granular PAM rate that best reduces runoff and soil loss from Oxisols. Furthermore, the effectiveness of the selected PAM rate was tested by applying it in a mixture with gypsum (G) or lime (L).
Get Price2018-10-1 · To investigate this potential, we treated in situ field plots with two practical surface application levels of anionic polyacrylamide (PAM only) with and without nanomagnetite (PAM-NM), examined soil physical properties, and evaluated the impact of this amendment on contaminant sorption and soil erosion control.
Get Price2020-10-29 · For this purpose, CP, colloidal molybdate–reactive P (MRPc), and colloidal molybdenum–unreactive P (MUPc) were measured in soil solutions. The results revealed that the release of CP, MRPc, and MUPc ranged respectively from 5.20 to 56.65, 1.62 to 39.09, and 0.33 to 37.10% of total P (TP) in soil solutions across three farmland soils.
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. 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 Price2017-9-1 · The lowest mean soil moisture content was observed in the grazing lands (11.09%) which characterized with less vegetation cover and slope ranges between 2% and 17%. This could facilitate to loose water without infiltrating into the soil and increased the evaporation rate to the atmosphere.
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 Price2020-3-1 · Anionic polyacrylamide (PAM) addition followed by a second rapid mixing stage occurred before the water traveled into the bottom of a slow mixing tank (15-gal capacity, 15-in. diameter, polyethylene tank which included a 6.5-in. Lightnin™ propeller located midway up the tank and operated at 102 rpms) where slow mixing occurred to aid floc aggregation.
Get Price2019-1-1 · Clay mineralogy has been identified as one of the most dominant soil factors affecting soil crusting in South Africa. This effect is so strong that soils have to be grouped according to their clay mineralogy before meaningful models describing relationships between crusting and various other soil factors can be derived (e.g., Bloem, 1992 ; Bloem and Laker, 1994a , Bloem and Laker, 1994b ).
Get Price2021-6-1 · Soil organic matter is the main compound affecting sorption of herbicides to soil particles. Among soil organic matter, humic substances are major adsorbents of herbicides and soils rich in these compounds are characterized by higher sorption despite leaching potential of applied herbicides (Prata et al., 2003). The rate of sorption may be dependent on the level of humification.
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 Price2020-3-1 · Anionic polyacrylamide (PAM) addition followed by a second rapid mixing stage occurred before the water traveled into the bottom of a slow mixing tank (15-gal capacity, 15-in. diameter, polyethylene tank which included a 6.5-in. Lightnin™ propeller located midway up the tank and operated at 102 rpms) where slow mixing occurred to aid floc ...
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 PriceAnionic polyacrylamide (PAM) is a linear, water-soluble anionic polymer that is widely used for erosion control and water quality protection. There has been an issue whether this formulation could possibly have negative effects on soil microbial diversity by altering microbial binding to soil particles or to one another and thus restricting ...
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 PriceUsing polyacrylamide to mitigate post-fire soil erosion. Assaf Inbar. Marcelo Sternberg. Marcos Lado. Assaf Inbar. Marcelo Sternberg. Marcos Lado. Related Papers. Forest fire effects on soil chemical and physicochemical properties, infiltration, runoff, and erosion in a semiarid Mediterranean region.
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 Price2021-7-4 · 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 PriceSupplementary cementitious materials (SCMs), such as fly ash (FA) and ground granulated blast-furnace slag (GGBS), are often used as a partial replacement of cements to improve the sustainability of Portland cement-based materials and reduce their environmental impact. Superabsorbent polymers (SAPs) can be successfully used as internal curing agents in ultra-high performance cementitious ...
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 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 Price2015-8-23 · In this study, we investigated the effect of biochar (BC) and fungal bacterial co-inoculation (FB) on soil enzymatic activity and immobilization of heavy metals in serpentine soil in Sri Lanka. A pot experiment was conducted with tomatoes (Lycopersicon esculentum L.) at 1, 2.5, and 5 % (w/w) BC ratios. Polyphenol oxidase, catalase and dehydrogenase activities were determined by idometric ...
Get PriceAbout the Journal. The journal 'Nature Environment and Pollution Technology' is a quarterly scientific research journal, devoted to broader aspects of the environment, and published in March, June, September and December in a year. It was initially published with the title of 'Journal of Environment & Pollution' (ISSN: 0971-4871) from 1994 to 2001. Its name was later changed to Nature ...
Get PriceHeavy metal pollution is of great concern. Due to expansion of industrial activities, a large amount of metal is released into the environment, disturbing its fragile balance. Conventional methods of remediation of heavy metal-polluted soil and water are expensive and inefficient. Therefore, new techniques are needed to provide environmentally friendly and highly selective remediation ...
Get PriceLots of studies have determined sorption isotherms in order to investigate the influence of soil parameters (organic matter content, clay content, pH, etc.) on the sorption of weakly acidic, weakly basic and neutral pesticides by a wide array of soils.Kinetic studies have revealed several interactions between sorption and degradation (Gevao et ...
Get Price2015-10-10 · The problem of soil salinity and sodicity is increasingly growing throughout the world. Soil properties may significantly be influenced by the accumulation of cations dispersing aggregates such as sodium (Na +) in the soil solution and exchangeable phases.Some detrimental effects of salinity and sodicity on physical (Hussain et al. 2001; Tejada et al. 2006), chemical (David and Dimitrios 2002 ...
Get Price2020-1-17 · Novel modified Ni/Fe layered double hydroxides with different morphology of spherical – like shape were fabricated via using urea as a ligand and glycerol (Ni/Fe LDH/GL) with Ni:Fe molar ratios ...
Get PriceHeavy metal pollution is of great concern. Due to expansion of industrial activities, a large amount of metal is released into the environment, disturbing its fragile balance. Conventional methods of remediation of heavy metal-polluted soil and water are expensive and inefficient. Therefore, new techniques are needed to provide environmentally friendly and highly selective remediation.
Get PriceUsing Polyacrylamide (PAM) for Reducing Sediment and Nutrient Losses from Cool Season Vegetable Fields. 55 Pages. Free PDF. Download PDF. PDF. PDF. Download PDF Package. PDF. Premium PDF Package. Download Full PDF Package. This paper. A short summary of this paper.
Get PriceAbout the Journal. The journal 'Nature Environment and Pollution Technology' is a quarterly scientific research journal, devoted to broader aspects of the environment, and published in March, June, September and December in a year. It was initially published with the title of 'Journal of Environment & Pollution' (ISSN: 0971-4871) from 1994 to 2001. Its name was later changed to Nature ...
Get PriceNews Briefs: More than 4 million farmers in the developing world grew genetically modified crops in 2001, Environmental Science & Technology 2002, 36, 5, 97A (News) Publication Date (Web): March 1, …
Get Price2021-3-31 · Urban storm water management concepts such as green infrastructure (GI) have become increasingly implemented worldwide for their numerous environmental benefits 1,2,3,4.One example of GI …
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 PriceEnvironmental Science & Technology 2013, 47, 9, 3957-3966 (Critical Review) Rice is a major source of inorganic arsenic (iAs) in the human diet because paddy rice is efficient at accumulating As. Rice As speciation is dominated by iAs and dimethylarsinic acid (DMA).
Get PriceRole of woody biochar and fungal-bacterial co-inoculation on enzyme activity and metal immobilization in serpentine soil. Journal of Soils and Sediments, 2015. Gamini Seneviratne. Mihiri Seneviratne. Meththika Vithanage. indika herath. Prasanna Kumarathilaka. Yong Ok. tharanga bandara. Gamini Seneviratne.
Get Price2004-3-1 · Scow KM (1993) Effects o f sorption-desorption and diffusion processes on the kinetics of biodegradation of organic chemicals in soil. In 'Sorption and degradation of pesticides and organic chemicals in soil', pp. 73 114. (SSSA: Madison. WI) Shea PJ (1986) Chlorsulfuron dissociation and adsorption on selected adsorbents and soils.
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 PriceAbstract: As a result of poor MSW management in South Africa, leachate generation has been reported in lined and unlined landfills, which calls for measures to quantify and safely return it to the environment without causing adverse effects on the facilities' vicinity. This paper presents a review of studies on leachate assessment and ...
Get Price2017-7-7 · For identification of alkyl sulfatase activity in cell extracts, native polyacrylamide gel electrophoresis (Native-PAGE) was used as described by Payne et al.. Briefly, native-PAGE was carried out with crude cell extract (containing 150 μg of protein) in 6% polyacrylamide gel prepared in 0.378 M Tris-glycine buffer (pH 8.3).
Get PriceThe sorption of dissolved organic matter (DOM) on surfaces of soil particles strongly depends on surface charge (SC). As anions and cations in soil solution affect SC, the sorption properties can also be modified by electrolytes. This issue is particularly important in alkaline soils.
Get PriceUsing Polyacrylamide (PAM) for Reducing Sediment and Nutrient Losses from Cool Season Vegetable Fields. 55 Pages. Free PDF. Download PDF. PDF. PDF. Download PDF Package. PDF. Premium PDF Package. Download Full PDF Package. This paper. A short summary of this paper.
Get PriceSources and transport. Several sources of anti-infectives in the environment have been identified, such as manufacturing wastes (Babić et al. 2007; Larsson et al. 2007), improper disposal of unused medication (Bound and Voulvoulis 2005), and landfill leachates (Holm et al. 1995).However, it has been recognized that the excretions of people or animals under treatment are the foremost source of ...
Get PriceAbstract • Background Global phosphorus (P) reserves are being depleted, with half-depletion predicted to occur between 2040 and 2060. Most of the P applied in fertilizers may be sorbed by soil, and not be available for plants lacking specific adaptations. On the severely P-impoverished soils of south-western Australia and the Cape region in South Africa, non-mycorrhizal species exhibit ...
Get Price2021-3-31 · Urban storm water management concepts such as green infrastructure (GI) have become increasingly implemented worldwide for their numerous environmental benefits 1,2,3,4.One example of GI …
Get Price2005-5-4 · Journal of Agricultural and Food Chemistry 2005, 53, 9, 3408-3414 (Article) One gram of onion added to the food of rats inhibits significantly (p < 0.05) bone resorption as assessed by the urinary excretion of tritium released from bone of 9-week-old rats prelabeled with tritiated tetracycline from weeks 1 …
Get Price2016-4-18 · Reductive dissolution of phosphorus-bearing iron (Fe) (oxyhydr)oxides has been regarded as a primary mechanism responsible for the mobilization of phosphorus (P) in sediments for over 70 years.
Get PriceNatural clays are abundantly available low-cost natural resource which is nontoxic to ecosystem. Over the recent years, research on the modification of clay to increase their adsorbent capacity to remove other contaminants from drinking water other than metals is in progress. This paper reviews the recent development of natural clays and their modified forms as adsorbing agents for treating ...
Get Price2021-7-8 · Draft screening assessment poly (amines) group. Draft Screening Assessment Poly (amines) Group. Chemical Abstracts Service Registry Numbers. 25988-97-0, 26062-79-3, 26590-05-6, 27967-29-9, 42751-79-1, 52722-38-0, 68130-99-4, 68134-56-5, 69418-26-4. Environment and Climate Change Canada Health Canada.
Get Price2020-4-13 · Over the past five years, a lot of research activities in polymer composites were done in order to improve environmental sustainability and to present advantages for commercial applications of water treatment and desalination. Polymers offered tunable properties, improved processability, remarkable stability, high surface area for fast decontamination, selectivity to eliminate different ...
Get PriceExperiments indicate OH• were produced only on the Ti4O7 REM and not on less reduced phases (e.g., Ti6O11). REMs were also tested for oxyanion separation. Approximately 67% removal of a 1 mM NO3– solution was achieved at 58 LMH, with energy consumption of 0.22 kWh m–3.
Get Price2021-7-12 · Poly Aluminium Chloride - PAC - Chemical Engineering. Poly Aluminium Chloride - PAC These compounds have the general formula (Al n (OH) m Cl (3n-m) )x and have a polymeric structure, totally soluble in water.
Get PriceCitations: 54 (Details) Assessment of Heavy Metals Pollution in Soils and Vegetation around Selected Industries in Lagos State, Nigeria, Journal of Geoscience and Environment Protection, Vol.3 No.7, 2015. Adeola Alex Adesuyi, Kelechi Longinus Njoku, Modupe Olatunde Akinola.
Get Price2015-8-3 · where X m is the maximum sorption capacity, β is the activity coefficient related to mean sorption energy, and ε is the Polanyi potential, which is equal to (7) where R is the gas constant (kJ/kmol). The slope of the plot of Inq e versus ε 2 gives β (mol 2 /J 2) and the intercept yields the sorption capacity, X m (mg/g).
Get PriceThe Groundwater for Sustainable Development Journal Impact IF 2020-2021 is 4.298. More IF Analysis, Trend, Ranking & Prediction.
Get Price2016-4-18 · Sediment Fe and P. The information on sediment Fe and P is summarized in Table 2.The total content of Fe in sediments for the 16 sites ranged from 25.14 to 45.44 mg g …
Get Price2018-4-19 · These substances are now collectively known as endocrine-disrupting compounds (EDCs), and have been linked to a variety of adverse effects in both humans and wildlife. More recently, pharmaceuticals and personal care products (PPCPs) have been discovered in various surface and ground waters, some of which have been linked to ecological impacts ...
Get PriceIn this paper, the interaction between pterostilbene and cyclodextrins (CDs) is described for the first time using steady-state fluorescence. It was seen that pterostilbene forms a 1:1 complex with all of the natural (α-, β-, and γ-CDs) and modified (HP-β-CD, methyl-β-CD, and ethyl-β-CD) CDs tested.
Get Price2018-4-19 · These substances are now collectively known as endocrine-disrupting compounds (EDCs), and have been linked to a variety of adverse effects in both humans and wildlife. More recently, pharmaceuticals and personal care products (PPCPs) have been discovered in various surface and ground waters, some of which have been linked to ecological impacts ...
Get PriceThe Groundwater for Sustainable Development Journal Impact IF 2020-2021 is 4.298. More IF Analysis, Trend, Ranking & Prediction.
Get PriceBauxite a naturally occurring porous crystalline alumina composition of kaolinite and iron oxides normally having surface area ranging from 25-250 m 2 g –1.Alumina has been tested by various workers for the removal of dyes 62.Silica gel, prepared by the coagulation of colloidal silicic acid resulted in the formation of porous and noncrystalline granules of different sizes.
Get PriceThis concentration range encompasses a lowest-observed-effect level based on reproductive effects in bobwhite quail of 62 µg PFOS/mL of egg yolk (Newsted et al. 2006). The lack of significant differences between species may be due to differences in experimental design, injection methodologies, and endpoint selection/definition, as well as the ...
Get PriceThe Sci-Hub project supports Open Access movement in science. Research should be published in open access, i.e. be free to read. The Open Access is a new and advanced form of scientific communication, which is going to replace outdated subscription models.
Get Price2004-8-1 · The first few millimetres of soil largely control the soil's response to the eroding forces of wind and water. The tendency of soils to form surface seals and crusts influences the processes of wind and water erosion differently. For wind, dry particle size distribution and particle organization determine the shear strength and threshold wind velocity necessary to initiate particle movement ...
Get PriceSorption of the Mo was revealed to be greater for the biosolid-amended soil. Though, Mo related with biosolid-amended soils is comparatively mobile and bioavailable. Adsorption of Mo was probed in California on 5 arid zone and the results showed that adsorption of molybdenum from pH 4-8 salinity solution was independent as a function of pH of ...
Get Price2016-4-18 · Sediment Fe and P. The information on sediment Fe and P is summarized in Table 2.The total content of Fe in sediments for the 16 sites ranged from 25.14 to 45.44 mg g …
Get PriceSources and transport. Several sources of anti-infectives in the environment have been identified, such as manufacturing wastes (Babić et al. 2007; Larsson et al. 2007), improper disposal of unused medication (Bound and Voulvoulis 2005), and landfill leachates (Holm et al. 1995).However, it has been recognized that the excretions of people or animals under treatment are the foremost source of ...
Get PriceChromite is the major mineral form of chromium; all chromium and chromium compounds prepared in the United States are from imported chromite ores. Importation is considerably more economical than mining the U.S. chromite deposits, most of which have a low chromium con- tent. About 75% of the imported ore comes from the U.S.S.R. and South Africa.
Get Price----- GROUND WATER TRACERS by Stanley N. Davis Darcy J. Campbell Harold W. Bentley Timothy J. Flynn Department of Hydrology and Water Resources University of Arizona Tucson, Arizona 85721 Cooperative Agreement CR-810036 Project Officer Jerry Thornhill Robert S. Kerr Environmental Research Laboratory Ada, Oklahoma 74820 Robert S. Kerr Environmental Research Laboratory …
Get Price2021-5-25 · Sharma, D. & Awasthi, M. D. Uptake of soil applied paclobutrazol in mango (Mangifera indica L.) and its persistence in fruit and soil. Chemosphere 60 (2), 164–169 (2005). ADS CAS Article Google ...
Get Price----- EE86-1C05S1 EPA/600/2-G5/022 March 1935 AN INTRODUCTION TO GROUND-WATER TRACERS by Stanley N. Davis Darcy J. Campbell Harold W. Bentley Timothy J. Flynn Department of Hydrology and Water Resources University of Arizona Tucson, Arizona 85721 Cooperative Agreement CR-810036 Project Officer Jerry Thornhill Robert S. Kerr Environmental Research Laboratory Ada, …
Get Price----- CHARACTERISTICS AND POLLUTION PROBLEMS OF IRRIGATION RETURN FLOW Prepared by UTAH STATE UNIVERSITY FOUNDATION The research upon which the publication is based was performed pursuant to Contract No. 14-12-408, with the Federal Water Pollution Control Administration, U. S. Department of the Interior.
Get PriceThe distinct stretchings between 300 and 4000 cm-1 are typical of water adsorption (Madejova, 2003).This shows that water adsorption and retention by clinoptilolite is increased by HCl activation at 0.02 M concentration At the range of 2000 and 1500 cm-1, the 0.02 M HCl-activated clinoptilolite showed two intensive peaks and yet again the original and the 0.04 M activated forms showed none.
Get Price2021-7-9 · Dr. Thava Palanisami completed his PhD on the Risk assessment and Remediation of mixed contaminants in 2010, at the University of South Australia.Thava’s PhD research demonstrated that chemicals in contaminated sites occur as mixtures rather than single contaminants, which had been the previous assumption for several decades.
Get Price----- EPA-660/2-74-049 June 1974 SELECTED IRRIGATION RETURN FLOW QUALITY ABSTRACTS 1972-1973 Third Annual Issue by Gaylord V. Skogerboe Wynn R. Walker Ray S. Bennett Betsy J. Zakely Grant No. R-800426 Program Element 1BB039 Dr. James P. Law, Jr., Project Officer Robert S. Kerr Environmental Research Laboratory Environmental Protection Agency Ada, Oklahoma 74820 …
Get Price