Bacteria-loaded Biochar (BC)/Phosphorus‑Modified Biochar (PBC): An Efficient Biosorbent for Remediation of Cd and Pb Co-Contaminated Soil

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-10-06 DOI:10.1007/s11270-025-08667-8

Ting Wei, Yuyao Wang, Xiulian Ma, Rongyi Hu, Junkang Guo, Li Hua, Xingkai Zhang

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引用次数: 0

Abstract

Heavy metal pollution is a serious environmental risk worldwide. Environmental-friendly strategies for heavy metal remediation are urgently needed. In this study, the bacterial consortium BR7 was constructed using heavy metal immobilizing bacteria Priestia megaterium B2 and Enterobacter sp. B57. The B2, B57 and BR7 (B2:B57 = 3:2) were immobilized on rice husk biochar (BC)/phosphorus‑modified biochar (PBC) and their effects on remediation of Pb, Cd co-contaminated soil were evaluated. Immobilization increased bacteria viability in heavy metal polluted soil. Addition of bacteria, BC/PBC, and the immobilized bacteria in soil reduced the DTPA-extractable Cd and Pb by 20.00%-62.18% and 10.77%-43.99%, respectively. Accompanied by the conversion of acid extractable Cd, Pb into residual state. Meanwhile, soil urease, sucrase and catalase activity were stimulated and the bacterial community was improved. Importantly, their application enhanced plant growth and reduced Cd, Pb content in pakchoi, the Cd content in shoot and root decreased by 2.45%-16.58% and 17.92%-59.93%, respectively. The Pb content in shoot and root decreased by 7.37%-70.17% and 2.03%-62.64%, respectively. Collectively, the immobilized bacteria exhibited better remediation performance than bacteria, BC/PBC alone, indicating a synergistic effect has occurred. Among them, BR7-PBC showed the best effect. This study provides a feasible way for remediation of heavy metal polluted soil.

Graphical Abstract

查看原文本刊更多论文

细菌负载生物炭(BC)/磷修饰生物炭（PBC）：一种修复Cd和Pb共污染土壤的高效生物吸附剂

重金属污染是世界范围内严重的环境风险。环境友好型的重金属修复策略是迫切需要的。本研究以重金属固定化细菌大芽孢杆菌B2和肠杆菌B57为材料，构建了细菌联合体BR7。将B2、B57和BR7 （B2:B57 = 3:2）固定化在稻壳生物炭(BC)/磷改性生物炭（PBC）上，评价了它们对铅、镉共污染土壤的修复效果。固定化提高了重金属污染土壤中细菌活力。土壤中添加细菌、BC/PBC和固定化细菌可使dtpa可提取的Cd和Pb分别降低20.00% ~ 62.18%和10.77% ~ 43.99%。伴随酸萃取的Cd、Pb转化为残留态。同时刺激土壤脲酶、蔗糖酶和过氧化氢酶活性，改善细菌群落。结果表明，施用有机磷农药可促进小白菜生长，降低小白菜Cd、Pb含量，地上部和根部Cd含量分别降低2.45% ~ 16.58%和17.92% ~ 59.93%。地上部和根部Pb含量分别下降7.37% ~ 70.17%和2.03% ~ 62.64%。总体而言，固定化细菌的修复性能优于单独使用BC/PBC的细菌，表明存在协同效应。其中BR7-PBC效果最好。本研究为重金属污染土壤的修复提供了一条可行的途径。图形抽象

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.