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Unusual uranium biomineralization induced by green algae: Behavior investigation and mechanism probe

Journal of Environmental Sciences 2023年第2期124卷 915-922页

作者： Yanxia Cheng Ting Zhang Shunzhang Chen Feize Li Renwei Qing Tu Lan Yuanyou Yang Jiali Liao Ning Liu Key Laboratory of Radiation Physics and Technology of the Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Key Laboratory of Bio-Resource and Eco-Environment of the Ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China

As a biosorbent,algae are frequently used for the biotreatment or bioremediation of water contaminated by heavymetal or ***,it is unclear that whether or not the biomineralization of these metal or radionuclides can be induced by algae in the process of bioremediation and what the mechanism *** this work,Ankistrodsemus *** been used to treat the uranium-contaminated water,and more than 98%of uranium in the solution can be removed by the alga,when the initial uranium concentration ranges from 10 to 80 mg/***,an unusual phenomenon of algae-induced uranium biomineralization has been found in the process of uranium bioremediation and its mineralization mechanism has been explored bymultiple *** is worth noticing that the biomineralization of uranium induced by Ankistrodsemus *** significantly affected by contact time and *** is captured rapidly on the cell surface via complexation with the carboxylate radical,amino and amide groups of themicroalgae cells,which provides nucleation sites for the precipitation of *** stimulates Ankistrodsemus *** metabolize potassium ions(K+),which may endow algae with the ability to biomineralize uranium into the rose-like compreignacite(K_(2)[(UO_(2))6O_(4)(OH)_(6)]•8H_(2)O).As the time increased,the amorphous gradually converted into compreignacite crystals and a large number of crystals would expand over both inside and outside the *** the best of our knowledge,this is the first investigated microalgae with a time-dependent uranium biomineralization ability and superior tolerance to *** work validates that Ankistrodsemus *** a promising alga for the treatment of uranium-contaminated wastewater.

关键词： Uranium algae ankistrodesmus sp. Biomineralization

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