期刊论文

中文

环境科学

0250-3301

2017

38

10

4398-4404

10.13227/j.hjkx.201703039

51378190:国家自然科学基金 51521006:国家自然科学基金 51578222:国家自然科学基金 51579094:国家自然科学基金 13JJB002:湖南省自然科学基金 2016SK2045:湖南省科技厅重点项目 17K019:湖南省教育厅创新平台开放基金

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选用了1株高耐镉(Cd)的烟曲霉,提出了利用烟曲霉在半固态培养体系表面生长并去除Cd的方法,研究了菌体对不同模拟Cd污染水平土壤中Cd的去除效果,测定了菌体吸附和富集Cd的变化。结果表明,烟曲霉在半固态培养体系中能够实现一定的Cd去除效果,Cd浓度为10 mg·kg~(-1)时,对土壤Cd的综合去除率可达31%。同时通过研究不同Cd浓度下烟曲霉干重和体系pH随时间变化情况,发现随着培养时间和Cd浓度的增加,烟曲霉干重逐渐下降,最大下降幅度可达64%,pH为5.6~6.0时去除效果较好。培养过程中土壤Cd形态变化表明,烟曲霉在该体系下主要去除土壤中弱酸溶态和可还原态的Cd,可氧化态Cd含量在培养前后基本保持不变。这...

A method was proposed to remove Cd from contaminated soils by a semi-solid culture containing Aspergillus fumigatus 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 Aspergillus fumigatus were measured. The results showed that Aspergillus fumigatus could remove some Cd from the soil in the semi-solid culture system. When the concentration of Cd was 10 mg·kg-1, the total removal rate of Cd was up to 31%. Meanwhile, the dry weight of Aspergillus fumigatus and th...