摘要
选择水、醋酸和不同有机溶剂对沈阳北部污水处理厂污泥进行浸提,采用方波阳极溶出伏安法和石墨炉原子吸收光谱法测定其中痕量Cd的几种活性形态。分析结果表明:酸溶态提取量较高,电化学活性态和离子交换态含量则较低,三者随时间和温度条件的变化呈一致的规律性。不同有机溶剂对Cd的提取能力与溶剂极性大小呈正相关性,有机态Cd提取量随浸提时间的增加而增高。
Sludge from a wastewater treatment plant in north of Shenyang was extracted by various organic solvents,and methods of anode V-I determination and granite GC were adopted to analyze mobility of Cd.Results showed that the content of electrochemical activity and ion-exchange was lower while the extracting content of acid solvent was high,all of which varied with time and temperature.The extract capability of Cd by different solvents was in positive correlation with solvent polarity and Cd extraction increased with time.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2005年第6期14-15,18,共3页
Environmental Science & Technology
基金
辽宁省科委自然科学基金资助项目(972088)
