天然含铅黄铁矿试样处理含Cr(Ⅵ)废水的机理研究  

Study on the treatment of Cr(Ⅵ)-containing wastewater by natural lead-bearing pyrite

作　　者：陈良玺 周川野 鲁安怀[1] 姬翔 丁竑瑞[1] 王长秋[1] 李艳[1] CHEN Liang-xi;ZHOU Chuan-ye;LU An-huai;JI Xiang;DING Hong-rui;WANG Chang-qiu;LI Yan(Key Laboratory of Orogenic Belts and Crustal Evolution,Beijing Key Laboratory of Mineral Environmental Function,School of Earth and Space Sciences,Peking University,Beijing 100871,China)

机构地区：[1]造山带与地壳演化教育部重点实验室,矿物环境功能北京市重点实验室,北京大学地球与空间科学学院,北京100871

出　　处：《岩石矿物学杂志》2022年第3期673-680,共8页Acta Petrologica et Mineralogica

基　　金：国家重点研发计划项目(2019YFC1805901)。

摘　　要：天然黄铁矿对Cr(Ⅵ)具有较强的处理能力。本研究选取湖北十堰某天然含铅黄铁矿试样处理含Cr(Ⅵ)的废水,利用X射线衍射、X射线荧光光谱对样品进行结构与成分分析,考察了去除Cr(Ⅵ)反应的影响因素。结果表明,天然含铅黄铁矿样品对Cr(Ⅵ)具有较好的去除能力,其对浓度为50 mg/L的含Cr(Ⅵ)废水去除率达95%~99%。并系统研究了黄铁矿颗粒粒度、反应时长、pH值对处理含Cr(Ⅵ)废水性能的影响,发现Cr(Ⅵ)主要吸附在黄铁矿颗粒表面形成絮状物质,对反应后产物的SEM和XRD分析结果表明,反应形成的絮状沉淀物为含铬、铅元素的针状铬铅矿,这对生成次生矿物沉淀从而除铬的新方法具有进一步的研究意义。Natural pyrite has strong treatment capacity for Cr(Ⅵ). In this study, a natural lead-bearing pyrite sample from Shiyan, Hubei Province was selected to treat the Cr(Ⅵ)-containing wastewater. The structure and composition of the sample were analyzed by X-ray diffraction and X-ray fluorescence spectroscopy, and the influencing factors of Cr(Ⅵ) removal reaction were investigated. The results show that the natural lead-bearing pyrite sample has a good ability to remove Cr(Ⅵ), and the removal rate of Cr(Ⅵ) wastewater with a concentration of 50 mg/L is 95%~99%. The effects of pyrite particle size, reaction time and pH value on the treatment of Cr(Ⅵ)-containing wastewater were systematically studied. It was found that Cr(Ⅵ) was mainly adsorbed on the surface of pyrite particles to form flocculent substances. The results of SEM and XRD analysis of the products after the reaction showed that the flocculent substances was needle crocoite containing chromium and lead elements, which had further research significance for the use of secondary mineral precipitation as a new method for chromium removal.

关 键 词：天然含铅黄铁矿 Cr(Ⅵ) 铬污染 去除率 铬铅矿 

分 类 号：P578.292[天文地球—矿物学] X703[天文地球—地质学]