摘要
报道了用脱乙酰基壳聚糖为絮凝剂 ,在电解质Na2 SO4 的作用下絮凝除镉的方法·考察了酸度、离子浓度、壳聚糖用量对去除率的影响·当水样含镉质量浓度不大于 40mg/L ,pH =8～9和壳聚糖的含量为 1%时 ,镉的去除率达到 99 95 %以上·在同样的条件下处理冶炼厂的含镉废水 ,除镉率达到 99 7%以上 ,其他金属离子铜、锌和铅的残余质量浓度分别为 0 0 5 3 ,0 5 8,0 0 1mg/L 。
The method of removal Cd(Ⅱ) from wastewater using chitosan with electrolysis of Na 2SO 4 as flocculants was described.The effects of pH, ion concentration of Cd(Ⅱ), concentration of chitosan as a flocculants on the removal rate of Cd(Ⅱ) were investigated respectively. When the ion concentration of Cd(Ⅱ) is not more than 40?mg/L, pH is 8～8.5 and the concentration of chitosan is 1%, the removal rate of Cd(Ⅱ) is higher than 99 95%. At the same condition the removal rate of Cd(Ⅱ) in waste water from a smelter is higher than 99 7%, the remainder ion concentrations of the other ions of Cu, Zn, and Pb in the wastewater are 0 053, 0.58 and 0 01?mg/L, which are less than the drainage standard fixed by P.R.China.The flocculation mechanism of chitosan to Cd(Ⅱ) was analyzed also.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第5期547-549,共3页
Journal of Northeastern University(Natural Science)
基金
原冶金工业部优秀青年基金资助项目 ( 9312 0 14 0 4) .
关键词
镉
废水处理
壳聚糖
絮凝剂
冶炼厂
cadium
wastewater treatment
chitosan
flocculent
