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WO2006021031A1 - Process for copper electrowinning
A method of electrowinning or electrorefining copper from a copper electrolyte solution which contains chloride ions, the method comprising the steps of: (a) forming a polyacrylamide solution by dissolving polyacrylamide, having a molecular weight range of 5,000 to 20,000,000 Daltons, in an acidic medium and under conditions to form a polyacrylamide block copolymer having blocks of carboxyl
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US20100028198A1 - Process for Copper Electrowinning
A method of electrowinning or electrorefining copper from a copper electrolyte solution which contains chloride ions, the method comprising the steps of: (a) forming a polyacrylamide solution by dissolving polyacrylamide, having a molecular weight range of 5,000 to 20,000,000 Daltons, in an acidic medium and under conditions to form a polyacrylamide block copolymer having blocks of carboxyl
1. Introduction. Chitosan (CS) is the most important derivative of chitin which is prepared by the alkaline deacetylation of chitin [].Chitosan structure is comprised of 尾-1,4-linked 2-amino-2-deoxy-尾-d-glucose (deacetylated d-glucosamine) and N-acetyl-d-glucosamine units [].According to United States Food and Drug Administration (USFDA), it is a GRAS (Generally Recognized as Safe) material
Hg(II) removal from water by chitosan and chitosan
The adsorption capacity of chitosan depends on the origin of the polysaccharide, and on the experimental conditions in the preparation, that determine the degree of acetylation, molecular weight, crystallinity, hydrophilicity, etc. [35].
Beads prepared from agarose powder (6% w / w) are cross-linked with 1,3-dichloro-2-propanol (DCP) under strong alkaline conditions. A net weight of 1.5 g of beads is added to 10 mL of a solution of 0.3 M NaOH in distilled water, and the mixture treated with 0.1 mL of DCP. The reaction is allowed to proceed for 1 h, with continuous agitation at
- Do polyaluminium chloride and anionic polyacrylamide water treatment residuals adsorb phosphorus?
- Polyaluminium chloride and anionic polyacrylamide water treatment residuals (PAC-APAM WTRs) as an amendment in three types of soils with the ratios (w/w) of 10%, 15%, and 20% were evaluated for phosphorus adsorption from aqueous solutions by batch studies.
- What is polyacrylamide (PAM) used for?
- npj Clean Water 1, Article number: 17 ( 2018 ) Cite this article High molecular weight (10 6 –3 × 10 7 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction reducer in both enhanced oil recovery and high volume hydraulic fracturing.
- How is partially hydrolyzed polyacrylamide wastewater treated?
- Yongrui, P., et al. Treatment of partially hydrolyzed polyacrylamide wastewater by combined Fenton oxidation and anaerobic biological processes. Chem. Eng. J. 273, 1–6 (2015).
- What is anionic polyacrylamide (PAM)?
- Anionic polyacrylamide (PAM) possesses interconnected and active groups that establish robust bonds with the surface of suspended colloids, promoting the formation of coarse particles among the suspended solids and a mixture of insoluble particles in water (Irfan et al. 2017).
