施用高炉渣对土壤磷吸附-解吸特性的影响  

Effect of blast furnace slags on adsorption-desorption characteristics of phosphorus in soil

作　　者：王耀晶[1,2] 孙辉[2] 杨丹[2] 陈彬[3] 罗国新[4] 刘鸣达[2,3] 

机构地区：[1]沈阳农业大学理学院,沈阳110866 [2]沈阳农业大学土地与环境学院,沈阳110866 [3]沈阳农业大学分析测试中心,沈阳110866 [4]沈阳市辽中县农产品质量安全检验检测中心,沈阳110200

出　　处：《环境工程学报》2012年第8期2887-2891,共5页Chinese Journal of Environmental Engineering

基　　金：沈阳市科技创新条件与环境建设项目(1091179-1-00)

摘　　要：采用振荡平衡法,研究了施用高炉渣对土壤磷的吸附解吸特征的影响。结果表明:Langmuir、Freundlich和Temkin方程都能较好地描述高炉渣对土壤磷的吸附特征,但以Langmuir模型为最优。与对照处理相比,施用高炉渣的土壤吸附平衡常数k值增大,自由能ΔG降低,最大吸附量Xm和最大缓冲容量MBC提高;磷的解吸量增加,总解吸量和总解吸率分别是对照处理的1.05～1.25倍和1.02～1.36倍;施用高炉渣还能减弱吸附-解吸过程中的滞后效应。上述结果说明施用高炉渣可以改善土壤保蓄和供应磷的能力。The effect of blast-furnace slags on the adsorption-desorption characteristics of soil phosphorus was investigated in this study. The results showed that the adsorption process fitted in well with Langmuir, Fre- undlich and Temkin equations, and was best simulated by Langmuir equation. Compared with the control treat- ment, the soil mixed with blast-furnace slags showed higher adsorption constant （k value） , maximum adsorption capacity（X~）, and the maximum buffer capacity （MBC）, Moreover, the desorption amount and rate was 1.05 - 1.25 and 1.02 - 1.36 greater, respectively, and the hysteresis was alleviated. However, the free energy （AG） decreased. Our results indicate that the application of blast-furnace slags could improve soil phosphorus conservation and supplying capacity.

关 键 词：高炉渣 磷 吸附 解吸 土壤 

分 类 号：X53[环境科学与工程—环境工程]