制革染整工段废水中铬的存在形式及对其去除的影响  

Existence of Cr in post-tanning wastewater and influencing factors on its removal

作　　者：唐余玲 周建飞[1] 张文华[1] 石碧[1,2] TANG Yuling;ZHOU Jianfei;ZHANG Wenhua;SHI Bi(National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China;The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China)

机构地区：[1]四川大学制革清洁技术国家工程实验室,四川成都610065 [2]四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《中国皮革》2017年第11期7-12,共6页China Leather

基　　金：国家自然科学基金(21476149);国家重点研发计划(2017YFB0308500)

摘　　要：以制革厂实际染整工段含铬废水为研究对象,通过测定碱沉淀法和絮凝法对废水中铬和总有机碳(TOC)的去除率、分析废水中铬配合物的电荷性质,探讨了该工段废水中铬难以去除的原因。试验结果表明:碱沉淀法和絮凝法对染整废水中铬的去除率均低于40%,主要原因是染整废水中大部分铬是以水溶性铬-有机物阴离子配合物的形式存在,难以去除。The removal extents of Cr and total oxygen carbon （TOC） in tannery post-tanning wastewater were determined by alkali precipitation and coagulation, and the charge properties of Cr complex in the wastewater were analyzed. On the basis of these investigations, the difficulty of Cr removing from post-tanning wastewater was discussed. The results indicate that only a low removal extent of Cr in post-tanning wastewater is obtained （〈40%） by alkali precipitation or coagulation, mainly due to the fact that most of Cr exists as negatively charged Cr-organics complex. Cr-organic complex in the form of colloid or particle is easy to be removed, while the water-soluble Cr-organics com- plex is the difficulty for Cr removal.

关 键 词：制革 染整 含铬废水 铬配合物 环境保护 

分 类 号：X794[环境科学与工程—环境工程]