当前位置: X-MOL 学术J. Hazard. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Impact of steel slag, gypsum, and coal gangue on microbial immobilization of metal(loid)s in non-ferrous mine waste dumps
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-09-04 , DOI: 10.1016/j.jhazmat.2024.135750
Ruofei Li , Jun Yao , Jianli Liu , Shun Jiang , Geoffrey Sunahara , Robert Duran , Miaomiao Li , Houquan Liu , Chuiyun Tang , Hao Li , Bo Ma , Bang Liu , Beidou Xi

Non-ferrous mine waste dumps globally generate soil pollution characterized by low pH and high metal(loid)s content. In this study, the steel slag (SS), gypsum (G), and coal gangue (CG) combined with functional bacteria consortium (FB23) were used for immobilizing metal(loid)s in the soil. The result shown that FB23 can effectively decrease As, Pb, and Zn concentrations within 10 d in an aqueous medium experiment. In a 310-day field column experiment, solid waste including SS, G, and CG combined with FB23 decreased As, Cd, Cu, and Pb concentrations in the aqueous phase. Optimized treatment was obtained by combining FB23 with 1% SS, 1% G, and 1.5% CG. Furthermore, the application of solid waste (SS, G, and CG) increased the top 20 functional bacterial consortium (FB23) abundance at the genus level from 1% to 21% over 50 days in the soil waste dump. Moreover, dissolved organic carbon (DOC) and pH were identified as the main factors influencing the reduction in bioavailable As, Cd, Cu, and Pb in the combination remediation. Additionally, the reduction of Fe and sulfur S was crucial for decreasing the mobilization of the metal(loid)s. This study provides valuable insights into the remediation of metal contamination on a larger scale.

中文翻译:


钢渣、石膏和煤矸石对有色金属废料堆中金属(loid)微生物固定的影响



全球有色金属矿山废料堆场产生的土壤污染,其特点是低 pH 值和高金属 (loid) 含量。本研究采用钢渣 (SS) 、石膏 (G) 和煤矸石 (CG) 结合功能菌联盟 (FB23) 将金属固定在土壤中。结果表明,FB23 在水性培养基实验中可在 10 d 内有效降低 As、Pb 和 Zn 浓度。在 310 天的现场柱实验中,包括 SS、G 和 CG 在内的固体废物与 FB23 结合降低了水相中 As、Cd、Cu 和 Pb 的浓度。通过将 FB23 与 1% SS、1% G 和 1.5% CG 联合使用来获得优化处理。此外,固体废物 (SS、G 和 CG) 的应用在 50 天内将土壤废弃物堆场中属水平排名前 20 位的功能菌财团 (FB23) 丰度从 1% 提高到 21%。此外,溶解有机碳 (DOC) 和 pH 值被确定为影响联合修复中生物利用度 As、Cd、Cu 和 Pb 降低的主要因素。此外,Fe 和硫 S 的减少对于减少金属 (loid) 的动员至关重要。这项研究为更大规模的金属污染修复提供了有价值的见解。
更新日期:2024-09-04
down
wechat
bug