土壤2011，Vol.43Issue(1)：50-55,6.
温度和水土比对红壤吸附低分子量有机酸的影响
Effects of Temperature and Solution/Soil Ratio on Adsorption of Low Molecular Weight Organic Acids in Red Soil
摘要
Abstract
This research investigated the effects of temperature and solution/soil ratio on the adsorption of oxalic, citric, tartaric and malic acids in red soil by a batch equilibrium method.The results indicated that the adsorption capacity, the maximum adsorption capacity (Sm) and adsorption affinity constant (K) all increased with the increase of temperature, but decreased with the increase of solution/soil ratio.The effects depended on the kinds of organic acids, and the influencing extent was negative to adsorption affinity constant (K).The adsorption capacities of oxalic, citric, tartaric and malic acids at 45℃ was 1.19, 1.22, 1.24 and 1.28 times higher than those at 25℃, respectively.The adsorption capacities of oxalic, citric, tartaric and malic acids at 100:1 solution/soil reduced by 48.3％, 54.9％, 63.5％ and 76.1％ compared to those at 10:1 solution/soil,respectively.关键词
红壤/低分子量有机酸/吸附/温度/水土比Key words
Red soil/ Low molecular weight organic acids/ Adsorption/ Temperature/ Solution to soil ratio分类
农业科技引用本文复制引用
喻艳红,张桃林,李清曼,王兴祥..温度和水土比对红壤吸附低分子量有机酸的影响[J].土壤,2011,43(1):50-55,6.基金项目
中国科学院知识创新工程项目(KZCX2-YW-438和KSCX1-YW-09)资助. （KZCX2-YW-438和KSCX1-YW-09）
