【摘要】 初步研究了稀土元素镧（Ｌａ）、铈（Ｃｅ）、镨（Ｐｒ）、钕（Ｎｄ）及其混合物对活性污泥生长的影响。结果表明，５０ｍｇ／Ｌ浓度以上的稀土元素对活性污泥生长有明显的影响，表观变色上浮；显微可见菌胶团疏松分散，原生动物个体游离。更多还原

【Abstract】 Effects of rare earth elements (La, Ce, Pr, Nd, and their mixture) on activated sludge were studied preliminarily. The results show that the rare earth elements(≥50mg/L) affect obviously activated sludge. The sludge changed in colour and floated in appearance. It could be seen that zoogloea were loosed and protozoan was free under a microscope.更多还原