首页|Simultaneous immobilization of multiple heavy metal(loid)s in contaminated water and alkaline soil inoculated Fe/Mn oxidizing bacterium
Simultaneous immobilization of multiple heavy metal(loid)s in contaminated water and alkaline soil inoculated Fe/Mn oxidizing bacterium
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Simultaneous immobilization of multiple heavy metal(loid)s in contaminated water and alkaline soil inoculated Fe/Mn oxidizing bacterium
TWo strains of Fe/Mn oxidizing bacteria tolerant to high concentrations of multiple heavy metal(loid)s and efficient decontamination for them were screened.The surface of the bio-Fe/Mn oxides produced by the oxidation of Fe(Ⅱ)and Mn(Ⅱ)by Pseudomonas taiwanensis(marked as P4)and Pseudomonas plecoglossicida(marked as G1)contains rich reactive oxygen functional groups,which play critical roles in the removal efficiency and immobilization of heavy metal(loid)s in co-contamination system.The isolated strains P4 and G1 can grow well in the following environments:pH 5-9,NaCl 0-4％,and temperature 20-30℃.The removal efficiencies of Fe,Pb,As,Zn,Cd,Cu,and Mn are effective after inoculation of the strains P4 and G1 in the simulated water system(the initial concentrations of heavy metal(loid)were 1 mg/L),approximately reaching 96％,92％,85％,67％,70％,54％and 15％,respectively.The exchangeable and carbonate bound As,Cd,Pb and Cu are more inclined to convert to the Fe-Mn oxide bound fractions in P4 and G1 treated soil,thereby reducing the phytoavailabil-ity and bioaccessible of heavy metal(loid)s.This research provides alternatives method to treat water and soil containing high concentrations of multi-heavy metal(loid)s.
Bio-Fe/Mn oxidesPseudomonasHeavy metal(loid)sRemoval and immobilization
Yi Wu、Shengli Wang、Jun Xu、Fei Zang、Song Long、Yining Wu、Yuqing Wang、Zhongren Nan
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Technology Research Center for Pollution Control and Remediation of Northwest Soil and Groundwater,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China
State Key Laboratory of Grassland Agro-ecosystems,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730000,China
Bio-Fe/Mn oxides Pseudomonas Heavy metal(loid)s Removal and immobilization
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