摘要
研究了黄原酸酯类、二硫代氨基甲酸类、均三嗪类三种重金属离子捕集剂对复鞣加脂废水的除铬能力,系统考查了p H、捕集剂投加量、反应时间等参数对废水总铬去除率的影响,确定了最适反应条件,总铬去除率达到95.32%。进一步考查了在最适条件下,金属盐Zn SO4的加入对总铬去除率的影响,结果显示加入金属盐Zn SO4之后沉淀效果更好,总铬去除率达到97.54%。表明在复鞣加脂废水成分复杂不易除铬的情况下,重金属捕集剂和金属盐的配合使用,总铬去除率更高,产生的沉淀可制作铬-锌、铬-铝鞣剂,能够回用于皮革生产。
This paper studies the capacity of three kinds of heavy metal ion trapping agent（the xanthate ester,dithiocarbamate and both triazine class） to remove chromium ion in re-tanning fatliquoring wastewater. In the experiment,p H, the amount of capture agent, reaction time and other parameters have been tested to optimum experimental conditions,and the total chromium removal rate can be reached 95.32%. After the addition of zinc sulfate, the effect is better than that of control experiments, the total chromium removal rate reached 97.54%. The research shows that in the case of complicated composition wastewater to remove chrome re-tanning fatliquoring, combining heavy metal capture agent with metal salt, the rate of total chromium removal is higher, the precipitation can produce chromium- zinc tanning agents,which are able to reused in leather making.
出处
《皮革科学与工程》
CAS
北大核心
2014年第6期39-43,共5页
Leather Science and Engineering
关键词
复鞣
重金属离子捕集剂
金属盐
re-tanning
heavy metal capture agent
metal salt
