论文部分内容阅读
采集湖北大冶城郊铜绿山矿区附近菜园土壤,进行耐重金属细菌的筛选,并获得对铜和镉离子抗性较强的细菌菌株,抗性水平高达3 mmol/L。以红壤胶体、褐土胶体和高岭石为材料, 在国内首次应用亚甲基蓝吸附法测定细菌、土壤胶体颗粒以及细菌胶体复合体的比表面积。结果表明,细菌的比表面积为145 m2/g,与褐土胶体比表面积相当,分别是红壤胶体和高岭石的 3.5和7倍。细菌的引入,使供试的褐土胶体、红壤胶体和高岭石体系的比表面积分别增大5.1、 3.3和1.9 m2/g,增长率分别为3.0%,8.0%和8.7%。细菌对红壤胶体和高岭石体系比表面积增长率的贡献大于褐土胶体体系。
The vegetable garden soil near the Tonglushan mining area in Daye suburbs of Hubei Province was collected for screening of heavy metal-tolerant bacteria and the bacterial strains resistant to copper and cadmium ions were obtained. The resistance level was up to 3 mmol / L. The red soil colloids, cinnamon gels and kaolinite were used as the materials to determine the specific surface area of bacteria, soil colloidal particles and bacterial colloidal complex by methylene blue adsorption method. The results showed that the specific surface area of bacteria was 145 m2 / g, which was 3.5 and 7 times higher than that of cinnamon soil, respectively, for red soil colloids and kaolinite. The introduction of bacteria increased the specific surface area of brown soil colloids, red soil colloids and kaolinite systems by 5.1, 3.3 and 1.9 m2 / g, respectively, with the growth rates of 3.0%, 8.0% and 8.7% respectively. The contribution of bacteria to the growth rate of specific surface area of red soil colloids and kaolinite systems was greater than that of the brown soil colloidal system.