首页 | 本学科首页   官方微博 | 高级检索  
     

One-step disposal of Cr (Ⅵ)-bearing wastewater by natural pyrrhotite
摘    要:

关 键 词:natural pyrrhotite   Cr(Ⅵ)-bearing wastewater   reduction Cr(Ⅵ)   precipitation Cr(Ⅲ)   one-step disposal   rational use of mineral resources.
收稿时间:2000-03-06

One-step disposal of Cr (VI)-bearing wastewater by natural pyrrhotite
Anhuai Lu,Jie Chen,Junxian Shi,Xiaoying Lu,Junli Tang,Min Guo. One-step disposal of Cr (VI)-bearing wastewater by natural pyrrhotite[J]. Chinese science bulletin, 2000, 45(17): 1614-1616. DOI: 10.1007/BF02886224
Authors:Anhuai Lu  Jie Chen  Junxian Shi  Xiaoying Lu  Junli Tang  Min Guo
Affiliation:(1) Department of Geology, Peking University, 100871 Beijing, China;(2) National Laboratory of Mineral and Rock Materials, China University of Geosciences, 100083 Beijing, China
Abstract:Cr(VI)-bearing wastewater can be treated by natural pyrrhotite which is used for reductant to reduce Cr(VI) and precipitant to precipitate Cr(III) simultaneously. The disposal products can be divided into three parts in the beakers, namely supernatant in the upper part, the yellowish colloidal precipitates in the middle part and the pyrrhotite in the lower part. The content of total Cr=Cr(VI)+Cr(III) in the supernatant liquid is 0.06 mg/L, which is lower than 1.5 mg/L of the discharge standard of China and near to 0.05 mg/L of the standard of potable water. This one-step disposal composing of both reduction and precipitation which is traditionally divided into two independent steps called reducing technology and precipitating technology respectively. The new method is of obvious economic advantage and favourable to decreasing surplus mud derived from adding Ca(OH)2 to precipitate Cr(III) traditionally so as to avoid recontamination. In fact, sodium sulfite (Na2SO3) used in disposal of Cr(VI) was traditionally produced from natural mineral of pyrrhotite (FeS). One molecule of FeS is 4 times more than that of Na2SO3 from a view point of rational use of mineral resources. Therefore the prospective of application of the one-step disposal of Cr(VI) method is full of promise.
Keywords:natural pyrrhotite  Cr(VI)-bearing wastewater  reduction Cr(VI)  precipitation Cr(III)  one-step disposal  rational use of mineral resources
本文献已被 SpringerLink 等数据库收录!
点击此处可从《科学通报(英文版)》浏览原始摘要信息
点击此处可从《科学通报(英文版)》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号