Bioremediation of lead-contaminated soil by inorganic phosphate-solubilizing bacteria immobilized on biochar

被引:38
作者
Zhu, Xiaoli [1 ,2 ]
Li, Xue [1 ]
Shen, Baoshou [1 ]
Zhang, Ziye [3 ]
Wang, Junqiang [1 ,3 ]
Shang, Xiaoqing [1 ,3 ]
机构
[1] Northwest Univ, Coll Urban & Environm Sci, Xian 710127, Peoples R China
[2] Shaanxi Key Lab Earth Surface Syst & Environm Carr, Xian 710127, Peoples R China
[3] Xian Jinborui Ecol Tech Co Ltd, Xian, Peoples R China
关键词
Lead-contaminated soil; Bio-remediation; Inorganic phosphate-solubilizing bacteria; (iPSB); Biochar; Immobilization mechanisms; HEAVY-METAL; ENZYME-ACTIVITIES; PHYSICOCHEMICAL PROPERTIES; AVAILABLE PHOSPHORUS; MECHANISMS; STRAW; REMEDIATION; COMBINATION; IRRIGATION; PYROLYSIS;
D O I
10.1016/j.ecoenv.2022.113524
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, a bio-composite (IBWS700) was prepared using inorganic phosphate-solubilizing bacteria (iPSB), which were immobilized on biochar produced from wheat straw (WS700). Further, the bio-remediation effects of the composite for lead (Pb) in soil were also investigated. The presence of different Pb species, physicochemical properties, enzyme activities, and immobilization mechanisms of Pb in soil were also evaluated. Compared to free iPSB and biochar, IBWS700 significantly decreased the lead bio-availability whereas increased the residual fraction, also affected available phosphorus (AP), cation exchange capacity (CEC), organic matter (OM) and activity of urease, alkaline phosphatase, sucrase and catalase. Interestingly, the changes in the enzyme activity, AP and OM performed twice increases with increasing Pb concentration, which was rarely reported. The reason might be attributed to the reconstruction of bacteria communities with high Pb load. Further, the immobilization mechanisms mainly included bio-adsorption and bio-precipitation. SEM revealed that the surface of IBWS700 covered with a large number of heterogeneous colonization of iPSB and white stack after Pb2+ adsorption. FTIR spectra showed that O-H, C-O-P, C--O, and C =C could play important roles in bio-adsorption. Moreover, XRD analysis indicated that bio-precipitates were mainly Pb5(PO4)3Cl. In general, the use of IBWS700 could effectively immobilize Pb2+ and improve soil quality.
引用
收藏
页数:8
相关论文
共 47 条
[31]   Characterization of hydroxyapatite and carbonated apatite by photo acoustic FTIR spectroscopy [J].
Rehman, I ;
Bonfield, W .
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE, 1997, 8 (01) :1-4
[32]   Fungal transformation of metallic lead to pyromorphite in liquid medium [J].
Rhee, Young Joon ;
Hillier, Stephen ;
Pendlowski, Helen ;
Gadd, Geoffrey Michael .
CHEMOSPHERE, 2014, 113 :17-21
[33]   Biosorption of heavy metals from aqueous solutions using indigenous and modified lignocellulosic materials [J].
Salman, Muhammad ;
Athar, Makshoof ;
Farooq, Umar .
REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY, 2015, 14 (02) :211-228
[34]   Qualitative and quantitative characterisation of adsorption mechanisms of lead on four biochars [J].
Shen, Zhengtao ;
Zhang, Yiyun ;
Jin, Fei ;
McMillan, Oliver ;
Al-Tabbaa, Abir .
SCIENCE OF THE TOTAL ENVIRONMENT, 2017, 609 :1401-1410
[35]   MEGA4: Molecular evolutionary genetics analysis (MEGA) software version 4.0 [J].
Tamura, Koichiro ;
Dudley, Joel ;
Nei, Masatoshi ;
Kumar, Sudhir .
MOLECULAR BIOLOGY AND EVOLUTION, 2007, 24 (08) :1596-1599
[36]   Physicochemical features, metal availability and enzyme activity in heavy metal-polluted soil remediated by biochar and compost [J].
Tang, Jiayi ;
Zhang, Lihua ;
Zhang, Jiachao ;
Ren, Liheng ;
Zhou, Yaoyu ;
Zheng, Yuanyuan ;
Luo, Lin ;
Yang, Yuan ;
Huang, Hongli ;
Chen, Anwei .
SCIENCE OF THE TOTAL ENVIRONMENT, 2020, 701
[37]   Diagnosis of soil contamination using microbiological indices: A review on heavy metal pollution [J].
Tang, Jiayi ;
Zhang, Jiachao ;
Ren, Liheng ;
Zhou, Yaoyu ;
Gao, Jun ;
Luo, Lin ;
Yang, Yuan ;
Peng, Qinghui ;
Huang, Hongli ;
Chen, Anwei .
JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2019, 242 :121-130
[38]   Characterization of phosphate solubilizing bacteria isolated from heavy metal contaminated soils and their potential for lead immobilization [J].
Teng, Zedong ;
Shao, Wen ;
Zhang, Keyao ;
Huo, Yaoqiang ;
Li, Min .
JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2019, 231 :189-197
[39]   Exploratory of immobilization remediation of hydroxyapatite (HAP) on lead-contaminated soils [J].
Wang, Yifan ;
Li, Ruizhen ;
Liu, Wenzhu ;
Cheng, Li ;
Jiang, Qun ;
Zhang, Ying .
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2019, 26 (26) :26674-26684
[40]   A proposal of "core enzyme" bioindicator in long-term Pb-Zn ore pollution areas based on topsoil property analysis [J].
Yang, JinShui ;
Yang, FengLong ;
Yang, Yang ;
Xing, GuanLan ;
Deng, ChunPing ;
Shen, YaTing ;
Luo, LiQiang ;
Li, BaoZhen ;
Yuan, HongLi .
ENVIRONMENTAL POLLUTION, 2016, 213 :760-769