腐殖酸-海藻酸钠固定化Bacillus cereus W-1处理水中Cr(Ⅵ)
吴志国 , 孙淑秀 , 闫慧娟 , 王浪 , 杨宗政
现代化工 ›› 2026, Vol. 46 ›› Issue (2) : 101 -108.
腐殖酸-海藻酸钠固定化Bacillus cereus W-1处理水中Cr(Ⅵ)
Immobilization of Cr(Ⅵ) in water treated with Bacillus cereus W-1 by humic acid-sodium alginate
In order to make the Cr(Ⅵ)-reducing bacterium Bacillus cereus W-1 more effective in the actual remediation of Cr(Ⅵ)-contaminated water,humic acid was added to enhance the removal effect of sodium alginate as the immobilized carrier,and its adsorption-reducing characteristics were characterized by SEM,FT-IR and XPS.The results showed that the optimal dosage and temperature for Cr(Ⅵ) removal by the immobilized bacterial strain with sodium alginate and humic acid as the carrier in the mass ratio of 20∶1 were 6 g/100 mL,45℃,and the optimal pH value of 8.Under optimal conditions,the immobilized bacterial strain could remove up to 98.9% of 50 mg/L Cr(Ⅵ) in the reaction for 24 h.Characterization showed that the surface of the immobilized strain contained a large number of carbonyl,carboxyl,amine,and other oxygen and nitrogenous groups,and the presence of these groups enhanced its ability to adsorb and reduce Cr(Ⅵ).The experiment showed that the immobilized Bacillus cereus W-1 had good recyclability.
蜡样芽胞杆菌 / 还原特性及机理 / 六价铬 / 固定化 / 腐殖酸
Bacillus cereus / reducing properties and mechanism / hexavalent chromium / immobilization / humic acid
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国家自然科学基金(42377038)
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