Remediation of arsenic and polycyclic aromatic hydrocarbon contaminated soils using electro-microbial combined remediation: effects of soil physicochemical properties

IF 2.8 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Environmental Earth Sciences Pub Date : 2025-05-26 DOI:10.1007/s12665-025-12335-9

Chengchen Jiang, Shuai Zhou, Xiaohua Shu, Guo Yu, Honghu Zeng, Zongqiang Zhu, Chen Yang, Zhi Dang

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引用次数: 0

Abstract

Composite pollution poses a significant challenge for soil remediation. This study simulated arsenic and PAH-contaminated soil in karst regions to evaluate the effectiveness of electro-bioremediation under varying soil conditions. Results showed that Alcaligenes faecalis subsp. faecalis exhibited strong PAH degradation and moderate As(V) reduction capabilities. PAH removal efficiency was maximized (55.93%), while arsenic removal efficiency declined as pH increased. Higher soil organic carbon and available nitrogen reduced arsenic removal, whereas increased available phosphorus enhanced it. Under optimized conditions (35 g/kg organic carbon, 150 mg/kg nitrogen, 50 mg/kg phosphorus), residual arsenic was minimized (118.80 mg/kg), and PAH removal peaked at 45.47%. These findings underscore the pivotal role of soil parameters in remediation efficiency, offering practical insights for optimizing electro-bioremediation strategies for soil contaminated by arsenic and PAH.

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电-微生物联合修复砷和多环芳烃污染土壤：土壤理化性质的影响

复合污染对土壤修复提出了重大挑战。本研究模拟喀斯特地区砷和多环芳烃污染土壤，评价不同土壤条件下电生物修复的有效性。结果表明：粪碱菌亚种；粪孢具有较强的多环芳烃降解能力和中等的As(V)还原能力。多环芳烃（PAH）的去除率最高（55.93%），而砷的去除率随着pH的增加而下降。较高的土壤有机碳和有效氮降低了砷的去除，而增加的有效磷则增强了砷的去除。在35 g/kg有机碳、150 mg/kg氮、50 mg/kg磷的优化条件下，砷残留量降至最低（118.80 mg/kg）， PAH去除率最高为45.47%。这些发现强调了土壤参数在修复效率中的关键作用，为优化砷和多环芳烃污染土壤的电生物修复策略提供了实践见解。

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来源期刊

Environmental Earth Sciences 环境科学-地球科学综合

CiteScore

5.10

自引率

3.60%

发文量

494

审稿时长

8.3 months

期刊介绍： Environmental Earth Sciences is an international multidisciplinary journal concerned with all aspects of interaction between humans, natural resources, ecosystems, special climates or unique geographic zones, and the earth: Water and soil contamination caused by waste management and disposal practices Environmental problems associated with transportation by land, air, or water Geological processes that may impact biosystems or humans Man-made or naturally occurring geological or hydrological hazards Environmental problems associated with the recovery of materials from the earth Environmental problems caused by extraction of minerals, coal, and ores, as well as oil and gas, water and alternative energy sources Environmental impacts of exploration and recultivation – Environmental impacts of hazardous materials Management of environmental data and information in data banks and information systems Dissemination of knowledge on techniques, methods, approaches and experiences to improve and remediate the environment In pursuit of these topics, the geoscientific disciplines are invited to contribute their knowledge and experience. Major disciplines include: hydrogeology, hydrochemistry, geochemistry, geophysics, engineering geology, remediation science, natural resources management, environmental climatology and biota, environmental geography, soil science and geomicrobiology.