摘要
通过PCP-Na在胶州湾近岸沉积物中的吸附解析实验,研究了离子化有机污染物PCP-Na的吸附解析特征和动力学模型,并考察了低分子有机酸的影响。结果表明胶州湾近岸沉积物中PCP-Na的吸附解析过程可分为三个阶段,双常数速率方程能较好地描述吸附过程和解析过程,相关系数的平均值分别为0.9346和0.9429。沉积物中有机质含量越高,吸附量越大。3种低分子有机酸不同程度地抑制沉积物中PCP-Na的解析量,其抑制的大小顺序为:柠檬酸>草酸>酒石酸。
The adsorption-desorption in the natural sediments is an underlying process affecting the transport, degradation, and biological activity of sodium pentachlorophenate （PCP-Na）. The adsorption-desorption dynamics of PCP-Na was studied in the coastal sedi- ments of Jiaozhou Bay. The results showed that the adsorption-desorption process of PCP-Na in sediments can be divided into three stages and the adsorption-desorption isotherms were very well fitted for the kinetics equations of two-constant rate kinetics （ the average of the correlation coefficient was 0. 9346 and 0. 9429, respectively）. The adsorption content of PCP-Na was increased with increasing the organic matter in the coastal sediment of Jiaozhou Bay. The effects of low-molecular-weight （LMW） organic acid on desorption of PCP-Na in testing sediments were studied also. The desorption of PCP-Na was inhibited by the LMW organic acid. The inhibitory trends were followed the sequence of Citric acid 〉 Oxalic acid 〉 Tartaric acid.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2008年第3期231-235,共5页
Marine Environmental Science
基金
山东省环保局科技项目(2004040-1)
关键词
PCP—Na
近岸沉积物
吸附解析
低分子有机酸
sodium pentachlorophenate
costal sediments
adsorption- desorption
low-molecular-weight organic acids
