Abstract:Batch equilibrium experiments were used to investigate the adsorption and desorption of oxytetracycline (OTC) in cinnamon soil and red soil with or without soil organic matter (SOM). Results showed that all adsorption and desorption isotherms were of deviation from the linear model. All experimental adsorption and desorption data could be best described by the Freundlich model, and all coefficients (r) were up to a very significant correlation. Removal of SOM could reduce OTC adsorption capacity (lgKf) and increase OTC adsorption strength (1/n) in soil. The apparent adsorption-desorption hysteresis was found with the average hysteresis index (HIa) 0.039 and 0.015 in cinnamon soil and red soil. The removal of SOM could significantly increase HIa (P <0.01) in cinnamon soil and red soil to 0.068 and 0.028, respectively.
鲍艳宇, 周启星, 万莹, 谢秀杰. 土壤有机质对土霉素在土壤中吸附-解吸的影响[J]. 中国环境科学, 2009, 29(6): 651-655.
BAO Yan-Yu, ZHOU Qi-Xing, WAN Ying, XIE Xiu-Jie. Effect of soil organic matter on adsorption and desorption of oxytetracycline in soils. CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(6): 651-655.