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Adsorption of Acid Phosphatase on Minerals and Soil Colloids in Presence of Citrate and Phosphate

作  者:
Huang Qiaoyun;Chen Wenli;L. Gianfreda
单  位:
关键词:
acid phosphatase;adsorption;goethite;kaolin
摘  要:
The aim of this work was to study the influence of phosphate andcitrate, which are common inorganic and organic anions in soils, onthe adsorption of acid phosphatase by kaolin, geothite and thecolloids separated from yellow-brown soil (YBS) and latosol (LS) incentral-south China. The YBS colloid has the major clay mineralcomposition of 1.4 nm mineral, illite and kaolinite while the LScolloid mainly contains kaolinite and oxides. The adsorption isothermof acid phosphatase on the examined soil colloids and minerals fittedto the Langmuir model. The amount of enzyme adsorbed in the absenceof ligands was in the order of YBS colloid>LS colloid>kaolin≈goethite.

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