矿山铁的硫化物矿物处理皮革厂含铬废水的研究  

The treatment of Cr-containing wastewater in tannery with the mine iron sulfide minerals

作　　者：石俊仙[1] 赵文岩[2] 吕梦开 王志婕 幸睿君 李瑾[1] 

机构地区：[1]内蒙古大学环境与资源学院,内蒙古呼和浩特010021 [2]内蒙古大学化学化工学院,内蒙古呼和浩特010021

出　　处：《岩石矿物学杂志》2015年第6期887-892,共6页Acta Petrologica et Mineralogica

基　　金：内蒙古科技厅应用研发项目(20130428);国家重点基础研究发展计划(973计划)(2014CB846001)

摘　　要：为了全面提升内蒙古大型硫铁矿的综合利用价值,尝试将其主要成分磁黄铁矿和黄铁矿分别用于处理含铬废水,找到了天然硫铁矿和改性硫铁矿处理Cr（Ⅵ）的最佳实验条件。与已有的研究相比,本研究所使用的矿样粒径减少到80~100目,用量减少了70%,所处理的含铬废水浓度增大到50 mg/m L。将处理含铬废水后的硫铁矿经XPS扫描分析后发现,天然黄铁矿在pH值分别为1.84、4.15和10.87的反应体系中处理Cr（Ⅵ）后,大部分的Cr（Ⅲ）以Cr2S3的物相出现,分别占总铬物相的77.99%、86.53和100%。天然磁黄铁矿在pH值为6.5,加热500℃改性后的黄铁矿在pH值为4.15时,也有相当量的三价铬以Cr2S3的物相出现。用已经获得的处理含铬Cr（Ⅵ）的最佳条件,直接用于处理某皮革厂高浓度的含Cr（Ⅲ）实际废水,去除率达73%。本研究为综合处理含铬废水提供了思路,成为矿山资源化的途径之一。In order to improve the comprehensive utilization of iron sulfide minerals in the abandoned mine in In- ner Mongolia, this study focused on making full use of the effective components of pyrite and pyrrhotite to treat Cr-containing wastewater. The optimal experimental conditions were found. Compared with the previous stud- ies, the grain size of samples used in this study was lowered to 80 - 100 mesh, the dosage was decreased by 70 %, and the concentration of chromium-containing wastewater treatment was increased to 50 mg/mL. It is worth mentioning that most of the Cr （ Ⅲ ） appeared in Cr2S3 phases by XPS scanning analysis after the treat- ment of Cr （Ⅵ）-containing wastewater by natural pyrite and pyrrhotite. The content of Cr2S3 accounted for 77.99%, 86.53 and 100% of total chromium phase respectively when natural pyrite was use to deal with Cr（ Ⅵ ） under the reaction system whose pH values were 1.84 and 4.15 and 10.87. There also appeared a con- siderable amount of trivalent chromium in Cr2S3 phase after using pyrrhotite in the pH of 6.5 and using modifi- cation pyrite heated under the condition of 500℃ and pH 4.15. The removal rate for processing directly the tan- nery of actual wastewater containing Cr （Ⅲ） was up to 73 % when the optimum conditions obtained in this study for the treatment of Cr （VI） were directly used. This research provides a means for the comprehensive treatment of Cr （Ⅵ） and Cr （Ⅲ）, and it has become one of the ways of producing useful resources in the course of mining.

关 键 词：磁黄铁矿 黄铁矿 含铬废水 XPS Cr2S3的物相 

分 类 号：P578.2[天文地球—矿物学] P579[天文地球—地质学]