CIESC Journal ›› 2009, Vol. 60 ›› Issue (2): 460-464.
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ZHANG Yanlin;ZHANG Qiuyun;WANG Ting
Online:
Published:
张延霖;张秋云;王婷
Abstract:
Graft copolymerization of acrylamide onto starch and reaction with mercaptoacetic acid subsequently were studied.The reaction product (St-AM-MCAA) was used in the treatment of wastewater containing low concentration cadmium ion (0.40 mg·L-1) as additive.An investigation was carried out to study the effect of St/AM (mass ratio of starch to acrylamide) on the grafting ratio and grafting efficiency and the content of thiol (SH) group.It was found that the cadmium ion removal percentage by St-AM-MCAA3 reached 89.7% and the residual concentration of cadmium ion in treated water was under 0.10 mg·L-1 in the conditions of pH=8 and additive concentration of 2.0 g·L-1 by selecting a high grafting ratio and thiol content product St-AM-MCAA3 as additive. The ability of St-AM-MCAA3 to remove low concentration wastewater containing cadmium ion was higher than that of St-AM3 by 10%.
Key words: 含镉废水, 淀粉, 巯基乙酸, 丙烯酰胺
含镉废水,
摘要: 对淀粉(St)接枝共聚丙烯酰胺(AM)并与巯基乙酸(MCAA)反应进行了研究,将得到的产物用于低浓度含镉废水处理取得了较好的效果。研究了淀粉与丙烯酰胺配比不同对St-AM接枝率和接枝效率的影响并对巯基化后得到的产物St-AM-MCAA的巯基含量进行了测定。对低浓度(0.4mg/L)含镉废水的处理研究发现:含镉废水在pH=8,添加量为50mg时镉去除率可达89.7%;St-AM-MCAA较St-AM产物能提高Cd2+去除率10%以上。
关键词: 含镉废水, 淀粉, 巯基乙酸, 丙烯酰胺
ZHANG Yanlin, ZHANG Qiuyun, WANG Ting. Removal of cadmium ions from low concentration wastewater containing cadmium by modified starch[J]. CIESC Journal, 2009, 60(2): 460-464.
张延霖, 张秋云, 王婷. 改性淀粉在低浓度含镉废水处理中的应用实验 [J]. 化工学报, 2009, 60(2): 460-464.
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