摘要:
The present invention relates to a non-cellulosic polysaccharide derivative: i) having a mean average molecular weight (Mw) from about 100,000 g/mol, preferably from about 150,000 g/mol and more preferably from about 200,000 g/mole to about 2,000,000 g/mol, preferably to about 1,800,000 g/mol and more preferably to about 1,400,000 g/mole; and ii) containing at least one cationic group, with a cationic degree of substitution (DScat.)extraction, from about 0.20 to about 0.30.
摘要:
Water contaminated with anions of heavy metals, e.g., arsenic values, is purified by contacting same with a composition containing at least one polysaccharide, such as starches or vegetable gums.