Adsorption of heavy metal on the ternary system of minerals-HA-bacteria composites
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X705;P579

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    Abstract:

    Soil pollution by heavy metal has been gradually serious in facility agriculture. Due to the interaction of soil minerals, organic matter and microorganisms at natural condition, the combination mechanism between soil single component and heavy metal couldn't represent the reality of the translocation and transformation of heavy metal in the soil. In this research, mechanical mixture of montmorillonite and kaolinite (Mont:Kao=1:1), Gram-positive(Bacillus subtilis, B.s) and Gram-negative (Pseudomonas putida, P.p), and humic acid (HA) were selected as phyllosilicates mineral in vegetable greenhouse and farmland soil, organic matter and bacteria respectively. Cd2+ and Cu2+ were taken as the target compounds. The adsorption mechanism and interaction on the binding of Cd2+ and Cu2+ by the ternary composites of Mont/Kao-HA-bacteria were investigated by macroscopy sorption together with XRD, ATR-FTIR and SEM. The experimental results showed that heavy metal ions had the additivity of sorption on Mont/Kao-HA or Mont/Kao-bacteria system, while the antagonism between heavy metal ions and the ternary Mont/Kao-HA-bacteria system. The kinetics data of Cu2+ adsorption on mesoporous goethite fitted well the pseudo-second-order equation. The maximum Cu2+ adsorption capacities followed the order:B.s > P.p > Mont/Kao-B.s > Mont/Kao-P.p > Mont/Kao-HA-P.p > Mont/Kao-HA > Mont/Kao.

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肖敏,陈永政,赵珊,张玉革,季颖,李士凤,2021,矿物-腐植酸-微生物体系对重金属吸附研究[J].岩石矿物学杂志,40(5):991~1000. XIAO Min, CHEN Yong-zheng, ZHAO Shan, ZHANG Yu-ge, JI Ying, LI Shi-feng,2021,Adsorption of heavy metal on the ternary system of minerals-HA-bacteria composites[J]. Acta Petrologica et Mineralogica,40(5):991~1000.

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History
  • Received:January 05,2021
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  • Online: September 16,2021
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