农业环境科学学报2012，Vol.31Issue(3)：530-537,8.
富啡酸对石灰性潮土中磷吸附-解吸及其对锌次级吸附-解吸的影响
Effects of Fulvic Acid (FA) on P Adsorption-Desorption and Zn Secondary Adsorption-Desorption in Calcareous Chao Soil
摘要
Abstract
The importance of P and heavy metal interaction have extended from nutrition field to maintain environmental safety field and human health. To elucidate the interaction mechanism of P and Zn, fulvic acid(FA) in soil system, the effect of different FA adsorption contents soil on P adsorption-desorption, and the soil secondary adsorption-desorption Zn after the soil adsorbed FA and P in calcareous Chao soil were studied. The results showed that, the P adsorption amount increased with P adsorption initial concentration increasing, and it decreased with FA adsorption initial concentration increasing when P and FA adsorbed at the same time. When isothermal adsorption curve of phosphate in calcareous Chao soil described with Langumir equation, the adsorption reaction constant(K), the most adsorption quantity(Xm ), and the most buffer capacity(K x Xm) were reduced with FA adsorption initial concentration increasing. The ratio of P desorption of KNO3、 KOH、HCl and total desorption amount to P adsorption amount increased with FA concentration increasing. The Zn2+ adsorption ratio decreased with P and FA adsorption initial concentration increasing, but it desorption ration increased with P and FA adsorption initial concentration increasing. It indicated that P and FA reduced the Zn2+ absorption by soil, and increased the Zn2+ desorption. So, the FA improved the P availability, and P and FA improved Zn availability in calcareous Chao soil.关键词
石灰性潮土/富啡酸/磷/锌/吸附/解吸Key words
calcareous Chao soil/ fulvic acid(FA)/ P/ Zn/ adsorption/ desorption分类
资源环境引用本文复制引用
田春丽,介晓磊,刘世亮,刘芳,化党领..富啡酸对石灰性潮土中磷吸附-解吸及其对锌次级吸附-解吸的影响[J].农业环境科学学报,2012,31(3):530-537,8.基金项目
河南省自然科学基金项目(0511031400,2008A208014) （0511031400,2008A208014）
