生物炭
根际
环境修复
尾矿
环境科学
微生物种群生物学
环境化学
微生物
农学
土壤污染
土壤水分
化学
土壤科学
生态学
生物
污染
细菌
遗传学
物理化学
有机化学
热解
作者
Huanhuan Geng,Fei Wang,Haoming Wu,Qizheng Qin,Shaoping Ma,Huilun Chen,Beihai Zhou,Rongfang Yuan,Shuai Luo,Ke Sun
标识
DOI:10.1016/j.jhazmat.2024.133817
摘要
The soil near tailings areas is relatively barren and contaminated by multi-metal(loid)s, seriously threatening the safety of crop production. Here, biochar and nano-hydroxyapatite (nHAP) were combined to improve the sterilized and unsterilized polymetallic contaminated soil, and soil incubation and soybean pot experiments were designed. Results showed that biochar and nHAP not only increased soil C, N, and P but also effectively reduced multi-metal bioavailability, wherein the combined application of the two amendments had the best effect on metal immobilization. The synergistic effect of the two amendments decreased the acid-soluble contents of Co, Cu, Fe, and Pb in rhizosphere soils up to 86.75%, 80.69%, 89.09%, and 96.70%, respectively. The ameliorant reduced the accumulation of metal(loid)s in soybean plants, and rhizosphere microorganisms inhibited the migration of soil metals to plants. Additionally, biochar and nHAP regulated the rhizosphere soil microbial community. The rhizosphere soil of the sterilization group tended to prioritize the restoration of the original dominant bacteria. As, Pb, Fe, Urease, OM, TN, and TP were the critical environmental variables affecting rhizosphere soil bacterial communities. Therefore, combining biochar and nHAP is an environmentally friendly strategy to reduce polymetallic mobility in tailings soil and crops and improve soil microbial community structure.
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