摘要
采用低成本、可持续修复材料处理酸性矿坑水(acid mine drainage,AMD)具有重要的科研价值和应用前景。选取基围虾、对虾、蛎虾和梭子蟹壳4种甲壳生物质,探究其对AMD模拟水样及恒定pH的AMD水样中镉的去除性能与机制。结果表明:甲壳生物质具有良好的镉去除能力(112.38~235.45 mg·g^(-1)),其含有丰富的碳酸钙对镉去除起了至关重要的作用,可通过中和作用调高AMD的pH值,降低镉的迁移能力;也可与镉离子形成碳酸镉沉淀,促进镉的固定。此外,甲壳生物质中大量的羟基、羧基等官能团可通过络合作用捕获镉离子。研究结果为甲壳生物质的资源化利用和废弃矿山AMD的低成本、可持续修复提供了理论依据。
Using low-cost and sustainable remediation materials to treat acid mine drainage(AMD) has important scientific research values and application potentials.In this study,four crustacean biomasses including Metapenaeus ensis,prawn,talon shrimp and swimming crab shells were selected to explore the performance and mechanism of cadmium removal in simulated AMD samples with and without constant pH.It was concluded that crustacean biomasses have excellent cadmium removal capabilities ranging from 112.38 to 235.45 mg·g^(-1).Their abundant calcium carbonate played a crucial role in the cadmium removal,in which not only the pH values of AMD were increased by neutralization with reduced cadmium mobilization,but also the cadmium was stabilized by forming cadmium carbonate precipitates.In addition,a large number of hydroxyl,carboxyl and other functional groups in crustacean biomasses can also capture cadmium ions through the complexation.These findings provide theoretical basis in promoting the resource utilization of crustacean biomasses and the low-cost and sustainable remediation of AMD from abandoned mines.
作者
贾郁菲
陈宏坪
李婧
张文影
艾雨露
韩璐
陈梦舫
JIA Yufei;CHEN Hongping;LI Jing;ZHANG Wenying;AI Yulu;HAN Lu;CHEN Mengfang(State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;University of Chinese Academy Sciences,Beijing 100049,China;Nanjing Jinghongze Environmental Technology Co Ltd.,Nanjing 210000,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2024年第1期189-196,共8页
Chinese Journal of Environmental Engineering
基金
江苏省自然科学基金资助项目(BK20210995)
国家自然科学基金资助项目(42207093)
云南省科技厅科技计划项目(202203AC100001-02)
江苏省“卓博计划”资助项目(2022ZB459)。
关键词
酸性矿坑水
甲壳生物质
镉
虾壳
资源化利用
acid mine drainage
crustacean biomass
cadmium
shrimp shell
resource utilization
