摘要
应用批量吸附实验法研究了华南地区7个红壤剖面对PCP的吸附量ΓPCP与剖面深度的关系,以及与土壤的理化性质、化学组成、矿物组成和形态的关系。双变量积矩相关分析发现吸附量ΓPCP与土壤pHw值、TOC呈非常显著相关,与AAOFe、AAOAl和DCBAl呈显著相关,但偏相关分析和剔除法逐步线性回归分析清楚显示,控制吸附量ΓPCP的4个最为重要因素是土壤pHw值、TOC、非晶态氧化铝(AAOAl)和砂粒矿物相(主要是石英)含量,其次是粘土矿物(主要是高岭石和水云母)、CaCO3和晶态氧化铁矿物(DCBFe)的含量。随着深度增加,土壤对PCP的吸附量ΓPCP明显下降。不同的剖面,吸附量有较明显差别,其与土壤pHw值和TOC等含量变化明显相关。
Pentachlorophenol （PCP） sorption in soils of seven profiles from south China was investigated by batch equilibrium procedure. As the profile depth increases the sorption values ΓPCP in soils decrease dramatically and most of ΓPCP descent took place within 50cm below surfaces. The SPSS statistical software was employed to analyze the relationship of values ΓPCP to the soil pHw, chemical and mineral composition as well as their morphology. The results show that the values ΓPCP were strongly controlled by the contents of TOC, poorly crystalline aluminum oxide （AAOAI） and sand phase minerals （major is quartz） in soil, as well as soil pHw values, and may be expressed as follow linear regression equation with correlation coefficient R=0.904 and standard error of estimated Se=0.101： ΓPCP=0.061 -0.059XpHw＋0.235XTOC＋0.988XAAOA＋0.005Xsand. Beside of above four controlling factors the relationships between ΓPCP and contents of clay phase minerals （main is kaolinite and illite）, crystalline iron and aluminum oxides （DCBAI and DCBFe）, poorly crystalline iron oxide （AAOFe）, clay phase minerals （main is kaolinite and illite） and CaCO3 were discussed too.
出处
《生态环境》
CSCD
北大核心
2005年第5期640-644,共5页
Ecology and Environmnet
基金
中国科学院创新前沿项目(GIGCX-04-02)
广东省自然科学基金项目(030461)
关键词
土壤
吸附
五氯苯酚
剖面分布
控制因素
soil
PCP
adsorption
profile distribution
controlling factors
