Nanjing University, Nanjing, China.
Water Sci Technol. 2011;64(7):1459-65. doi: 10.2166/wst.2011.574.
Upflow anaerobic sludge bed reactors fed on glucose were used to investigate the effects of Ce(3+) on soluble microbial products (SMP) production, which is the majority of the residual chemical oxygen demand present in the effluent. It was found that Ce(3+) concentration of 0.05 mg/L had no significant effect on the amount of SMP production, whereas that of 1 mg/L led to the increase in SMP production. The molecular-weight distribution and carbohydrate analysis indicated that an increase in SMP production may be partly attributed to the release of extracellular polymeric substances (EPS) into the bulk solution resulted from cerium toxicity, and the nucleic acids analysis suggested that increased cell lysis also contributed to SMP accumulation in the presence of Ce(3+). The increase in SMP production in the presence of Ce(3+) is possibly a consequence of the release of EPS and increased cell lysis due to cerium toxicity.
上流式厌氧污泥床反应器以葡萄糖为食，用于研究 Ce(3+) 对可溶解性微生物产物（SMP）生成的影响，SMP 是废水中存在的大部分残余化学需氧量。结果发现，Ce(3+) 浓度为 0.05mg/L 时对 SMP 生成量没有显著影响，而 1mg/L 时则会导致 SMP 生成量增加。分子量分布和碳水化合物分析表明，SMP 生成量的增加可能部分归因于铈毒性导致胞外聚合物（EPS）释放到主体溶液中，核酸分析表明，在存在 Ce(3+) 的情况下，细胞裂解增加也导致 SMP 积累。由于铈毒性导致 EPS 释放和细胞裂解增加，SMP 生成量的增加可能是一个后果。
