环境工程学报2018，Vol.12Issue(2)：475-481,7.DOI:10.12030/j.cjee.201707009
固定床吸附柱处理含Mn2+酸性矿山废水
Treatment of Mn2+ acid mine wastewater by fixed bed adsorption
摘要
Abstract
To explore the optimal removal of acidity and heavy metal ions in acid mine drainage (AMD) and ascertain the optimum operation,with the condition of fixed bed operation,the optimum adsorbent for small continuous flow reactor was determined by comparing the effect of composite particle column,manganese sand column,composite particles and manganese sand mixing column on acidity and Mn2+ removal in AMD.Based on determining the best adsorbent,the optimal operation mode of small continuous flow reactor was determined by comparing the effect of upflow submerged and downflow submerged and downflow non-submerged on the acidity and Mn2+ removal in AMD.Combined with microscopic analysis such as SEM and XRD,the regularity and mechanism of heavy metal ions removed by dynamic adsorption of composite particles were revealed.The results showed that the adsorption capacity of Mn2+ adsorbate was PG column (28.871 mg · g-1) ＞ PG-MS column (16.935 mg · g-1) ＞ MS column (2.194 mg · g-1).The relationship between the total adsorption capacity of Mn2+ and the three run modes was downflow non-submerged (28.817 mg · g-1) ＞ upflow submerged (26.532 mg · g-1) ＞ downflow submerged (23.479 mg · g-1).Therefore,the best adsorption material for the dynamic treatment of AMD containing Mn2+ is bentonite-steel slag composite particles.The best way to perform composite particles is downflow non-submerged.In the process of removing Mn2 +,addition of Mn2 + function as adsorption,chemical precipitation,accumulation and so on.Mn2 + on the surface of the composite particles mainly existes in combination with Mn-Si-O of the mineral phase and the CaMn7O12 precipitate present.关键词
含Mn2+酸性矿山废水/膨润土/钢渣/重金属/固定床吸附柱Key words
mine wastewater containing Mn2 + acid/bentonite/steel slag/heavy metal/fixed bed adsorption column分类
资源环境引用本文复制引用
肖利萍,宋佳诺,王睿键,李莹..固定床吸附柱处理含Mn2+酸性矿山废水[J].环境工程学报,2018,12(2):475-481,7.基金项目
国家自然科学基金资助项目(51474122,51174267) （51474122,51174267）
辽宁省“百千万人才工程”资助项目(2014921069) （2014921069）
辽宁省教育厅科学技术研究项目资助 （）
格平绿色行动辽宁环境科研“123工程”资助(CEPF2014-123-2-4) （CEPF2014-123-2-4）
