黑曲霉产酸淋滤去除污染土壤中的重金属.PDF

2008,28(8) 736~741 China Environmental Science 1,2 1∗ 1 , , (1., 110016 2., 100049) .(w/v)5%, 10%, 20%, ,.,,5%7d , CuCdPb Zn 25.2%, 98.3%, 30.2%, 15.7%;CuCdPb Zn 27.1%, 36.8%, 0%, 7.6%.,10%9d ,CuCdPb Zn 67.4%, 86%, 23.3%7.6%;CuCdPb Zn 55.2%, 85.7%, 7.8%18.1%. ; X53 A 2008 Removal of heavy metals from contaminated soils using organic acids produced by Aspergillus niger . REN Wan-xia1,2 1∗ 1 , LI Pei-jun , LI Xiao-jun (1.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China). China Environmental Science, 2008,28(8) 736~741 Abstract Bioleaching process developed using fungus Aspergillus niger to produce organic acids for leaching of heavy metals from contaminated soils. Sucrose and mineral salts medium were used to produce organic acids at various pulp density (5%, 10%, 20%, w/v). During one-step bioleaching process, at 5% (w/v) of pulp density and 7d of leaching time, 25.2% of Cu, 98.3% of Cd, 30.2% of Pb, 15.7% of Zn were removed from Shenyang Smelting Plant soil, and heavy metal removals of Cu 27.1%, Cd 36.8%, Pb 0% and Zn 7.6% were obtained from Zhangshi Irrigation Area soils, respectively. During two-step bioleaching process, at 10% (w/v) of pulp density and 9d of remediating time, 67.4% of Cu, 86% of Cd, 23.3% of Pb and 7.6% of Zn were removed from Shenyang Smelting Plant soils, and 55.2% of Cu, 85.7% of Cd, 7.8% of Pb and 18.1% of Zn were removed from Zhangshi Irrigation Area soils, respectively. Key words Aspergillus niger soil heavy metal bioleaching H+ 1 1.1 [1],, , [2 3]., , [4 5],(Aspergillus niger ,