凤眼莲对含银废水中银的富集量及其应用研究  

Study on the accumulation amount of silver in wastewater and its utilization by water hyacinth.

作　　者：戴全裕[1] 陈源高[1] 皮宇 张珩 徐根荣 张秀英[3] 戴文宁[4] 

机构地区：[1]中国科学院南京地理与湖泊研究所,南京210008 [2]无锡电影胶片厂,无锡214165 [3]地质矿产部南京中心实验室,南京210018 [4]南京大学化学系

出　　处：《应用生态学报》1991年第2期159-167,共9页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金

摘　　要：1987—1989年进行了关于凤眼莲(Eichhornia crassipes)等水生植物对含银废水中银的富集量及其应用问题的研究。在国外,Wolverton测定了化学废水中凤眼莲根部对银的富集量为113ppm(占干物重),而本项研究在含银废水浓度为80—160ppb中生长的凤眼莲根部对银的富集量达12251ppm(占干物重),其富集系数F_x为102194,灰分含银量为4.125％,灰分富集系数F_x′为343750。并成功地从净化含银废水的凤眼莲植物残体(约6kg灰分)中提炼和回收白银105g。这不仅具有重要的科学意义,而且也为其它含贵稀金属的废水净化及回收有用金属提供了有益的经验。The accumulation amount of silver in wastewater and its utilization by aquatic plants uch as water hyacinth (Eichhornia crassipes) had been studied during 1987—1989. At abroad, Wolverton detected 113 ppm(DM)silver in roots of water hyacinth in chemical wastewater, but this research detected 12 251.3 ppm (DM) with an accumulation coefficient Fx of 102 194 in from 80 to 160 ppb Ag concentra ion of wastewater, its ash content is 4.125%, and accumulation coefficient Fx' is 343 750. It was succeeded to recover the silver from aquatic plants, whose amount is 105g from about 6kg ashes. This study offered a profitable experience in purifying wastewater containing precious metals and recovering them.

关 键 词：凤眼莲 银 富集系数 

分 类 号：X171[环境科学与工程—环境科学]