CAJ | 학술논문

为研究煤矸石中重金属 Cu2+的释放机理及影响其释放的关键因素,以煤矸石和 CuS 晶体为研究对象,研究两者 Cu2+在不同 pH 条件下的静态溶出趋势,分析其相似性.实验结果表明:不同 pH 条件下1~5 d 时间内两者)的溶出具有显著影响,Cu2+溶出速率在低 pH 条件下较高;Fe3+促进 Cu2+的溶出.Cu 溶出浓度-时间的拟合直线表明,实验中各环境对 CuS 晶体溶出以及对煤矸石 Cu2+溶出趋势具有相似的影响作用,煤矸石在 Fe3+条件下遵循 CuS 溶出规律.说明酸性矿山废水的低 pH 和高 Fe3+与煤矸石重金属的溶出相互促进,提高 pH 和降低 Fe3+均有助于显著减少煤矸石中重金属硫化物的溶出释放.
위연구매안석중중금속 Cu2+적석방궤리급영향기석방적관건인소,이매안석화 CuS 정체위연구대상,연구량자 Cu2+재불동 pH 조건하적정태용출추세,분석기상사성.실험결과표명:불동 pH 조건하1~5 d 시간내량자)적용출구유현저영향,Cu2+용출속솔재저 pH 조건하교고;Fe3+촉진 Cu2+적용출.Cu 용출농도-시간적의합직선표명,실험중각배경대 CuS 정체용출이급대매안석 Cu2+용출추세구유상사적영향작용,매안석재 Fe3+조건하준순 CuS 용출규률.설명산성광산폐수적저 pH 화고 Fe3+여매안석중금속적용출상호촉진,제고 pH 화강저 Fe3+균유조우현저감소매안석중중금속류화물적용출석방.
In the paper we use coal gangue and CuS crystal as objects of the study to discuss the heavy metal Cu2+ release mechanism in coal gangue. We performed static leaching experiment of Cu at different conditions, by setting Fe3+ in different pH environments. And the experimental time was one to five days. The experimental results show that, in the condition of low pH Cu2+ dissolution rate increased obviously. Fe3+ also can promote Cu2+ dissolution yet Fe2+ had no significant effect. The concentration of Fe3+ gradually decreased in the dissolution process of Cu2+, and this phenomenon is particularly evident in coal gangue samples. Thus the dissolution behavior of Cu2+ in coal gangue and CuS crystal are similar.