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Visualization of Germinosomes and the Inner Membrane in Bacillus subtilis Spores
Published on: April 15, 2019
Rapid and effective removal of As(III) and As(V) using spore@Ti4+ microspheres
Lijuan Lan1, Bingjie Zheng1, Yao Zhang1
1State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
Abstract:
Removing arsenic from aquatic environments has become an urgent problem worldwide. In this study, Ti4+- loaded bacterial spore were adopted as a novel adsorbent (spore@Ti4+ microspheres) for the adsorption efficient removal of arsenite (As(III)) and arsenate (As(V)). The developed adsorbents were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR) and X-ray photoelectron spectroscopy (XPS). Results indicated that the adsorption kinetics was well described by a pseudo-second-order kinetic model, and the adsorption process rapidly achieved equilibrium within 15 min at pH 7.0. The adsorption mechanism was also investigated. The maximum adsorption capacities for As(III) and As(V) were 97.26 mg g-1 and 137.01 mg g-1, respectively, based on the isothermal studies. These properties suggest that spore@Ti4+ microspheres can be potentially applied in water treatment.
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