载镉废啤酒酵母中金属镉的回收  

Recovering Cadmium in Waste Saccharomyces Cerevisiae Loaded Cammium

作　　者：代淑娟[1,2] 魏德洲[1] 白丽梅[2] 周东琴[1] 张一氢[3] 

机构地区：[1]河北理工大学资源与环境学院,唐山063009 [2]东北大学资源与土木工程学院,沈阳110004 [3]沈阳市环境保护局东陵分局,沈阳110016

出　　处：《有色金属（冶炼部分）》2009年第5期10-12,共3页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(50174014);辽宁省自然科学基金项目(20042021);辽宁省科技计划项目(2006223002)

摘　　要：以水洗废啤酒酵母为吸附剂,对废水中镉离子进行生物吸附及固液分离后,获得载镉废啤酒酵母。采用焙烧-酸浸-置换法回收"载镉菌体上的镉",在700℃焙烧24 h,菌渣中镉富集比为31.72,烧渣经15 g/L的硫酸、温度85℃条件下,浸出2 h,再用锌粒置换,得海绵镉,镉总回收率在98%以上。The waste saccharomyces cerevisiae loaded cadmium was got by using water-washing waste saccharomyces cerevisiae as adsorbent to adsorb cadmium ions in waste water and separate waste saccharomyces cerevisiae loaded cadmium from water. The method of roasting, leaching in acid and replacement by zinc was used to recover cadmiam from waste saccharornyces cerevisiae loaded cadium. Roasted for 24 h at 700℃, and then leached for 2 h by 15g/L H2SO4 at 85℃, and zinc is used to replace sponge cadmium. The general recovery of cadmium is above 98%.

关 键 词：镉 废啤酒酵母 酸浸 置换 

分 类 号：X503.23[环境科学与工程—环境工程] TS261.9[轻工技术与工程—发酵工程]