【摘要】 本文研究了聚合氯化铝作为一种新的无机吸附共沉淀剂对水中微量铬(Ⅵ)的富集和测定,实验表明,它能有效地富集水中做量铬(Ⅵ),1.5g聚合氯化铝在1000ml溶液中(pH7—8,铬(Ⅵ)浓度0—500μg/1),搅拌速度在300r/min左右,搅拌间10min时,铬(Ⅵ)的吸附率在95%以上,用分光光度法满意地实现了对河水中微量铬(Ⅵ)的测定.结果表明:铬(Ⅵ)的加入回收率≥94%,测定的相对标准偏差≤3%.更多还原

【Abstract】 As a new inorganic coprecipitator poly aluminium chloride (PAC) can be used to concentrate chrome(Ⅵ) in water. It was found out that PAC. Micro amounts of chrome (Ⅵ) in water can be efficiently concentrated using 1.5g PAC in 1000ml solution (pH7-8, 0-500ug/l). When stirring speed is 300r/min and stirring time is l0min, the adsorption rate is greater than 95%, The good results of determination for micro amounts of Cr(Ⅵ) in river has been achieved by using spectrophotometry. Recovery of Cr(Ⅵ) is greater than 94% and relative standard deⅥation is equal or less than 3%.更多还原