Chen Yao-Ning, Wang Yuan-Nan, Li Yuan-Ping, Li Hui, Chen Yan-Rong, Wu Yan-Xin, Gou Yu, Zhu Fu-Zao, Zhang Dao-Li, Liu Yao, Zeng Guang-Ming
College of Environment Science and Engineering, Hunan University, Changsha 410082, China.
Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Changsha 410082, China.
Huan Jing Ke Xue. 2017 Oct 8;38(10):4398-4404. doi: 10.13227/j.hjkx.201703039.
A method was proposed to remove Cd from contaminated soils by a semi-solid culture containing that have a strong resistance to Cd. The removal efficiencies of Cd in different simulated Cd pollution levels were studied and the changes in Cd adsorption and the enrichment in were measured. The results showed that could remove some Cd from the soil in the semi-solid culture system. When the concentration of Cd was 10 mg·kg, the total removal rate of Cd was up to 31%. Meanwhile, the dry weight of and the pH of the system were studied during the culture process. The results showed that the dry weight decreased with the increase in culture time and Cd concentration, the maximum decrease rate of dry weight was 64%. The removal efficiency was the best when the pH was varied from 5.6 to 6.0. The changes in different extraction fractions for Cd showed that the main fractions of Cd removed by were the acid-soluble fraction and the reducible fraction and the oxidizable fraction of Cd remained essentially unchanged before and after the culturing. The proposed method would provide valuable information for the remediation of heavy metal-contaminated soil by fungi.
提出了一种利用对镉具有较强抗性的[某种物质]的半固体培养物从污染土壤中去除镉的方法。研究了不同模拟镉污染水平下镉的去除效率，并测定了镉吸附和[某种物质]中富集的变化。结果表明，[某种物质]可以在半固体培养系统中从土壤中去除一些镉。当镉浓度为10 mg·kg时，镉的总去除率高达31%。同时，研究了培养过程中[某种物质]的干重和系统的pH值。结果表明，干重随培养时间和镉浓度的增加而降低，干重最大降低率为64%。当pH值在5.6至6.0之间变化时，去除效率最佳。镉不同提取组分的变化表明，[某种物质]去除的镉的主要组分是酸溶态组分和可还原态组分，培养前后镉的氧化态组分基本保持不变。所提出的方法将为真菌修复重金属污染土壤提供有价值的信息。
