Li Yi, Hu Hong-ying, Yu Yin, Li Xin
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China.
Huan Jing Ke Xue. 2008 Jun;29(6):1632-7.
Bioremediation of nitrobenzene-polluted sediments was studied through lab-scale and in situ experiments. The polluted sediments were remediated through the addition of bacterial separated from the sediments, even at a low temperature of 5 degrees C. Nitrobenzene at a concentration of 11.8 mg/kg was biodegraded within 4 d with the addition of 2 mL cell solution (10(7) cells/mL). No extra nutrients were needed for the bioremediation process, showing that enough nutrients existed in the sediments. For the in situ bioremediation experiment, the initial nitrobenzene concentrations at solution and sediments were 50-61 mg/L and 7-8 mg/L respectively. The remediation process was also enhanced through cell addition. The above mentioned nitrobenzene was biodegraded within 48 h, compared with 96 h without cells presence. Nitrobenzene in solution was removed preferentially than those in sediments.
通过实验室规模和原位实验研究了硝基苯污染沉积物的生物修复。即使在5摄氏度的低温下，通过添加从沉积物中分离出的细菌对污染沉积物进行了修复。添加2 mL细胞溶液（10⁷ 个细胞/mL）后，浓度为11.8 mg/kg的硝基苯在4天内被生物降解。生物修复过程不需要额外的营养物质，表明沉积物中存在足够的营养物质。对于原位生物修复实验，溶液和沉积物中的初始硝基苯浓度分别为50-61 mg/L和7-8 mg/L。通过添加细胞也增强了修复过程。上述硝基苯在48小时内被生物降解，而在没有细胞存在的情况下需要96小时。溶液中的硝基苯比沉积物中的硝基苯优先被去除。
