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Bolan等人采用一次平衡法和柱状淋洗实验对有Ca~2+离子或K~+离子存在时土壤对硫酸盐吸附进行了比较研究,发现土壤对SO~(2-)离子的吸附在有Ca~(2+)时较有K+时为大,随Ca_4~(2+)吸附量的增加而增大,且与土壤所含可变电荷成分有较大关系. 对于以Fe、Al水合氧化物为主要可变电荷成分的土壤,其单位SO_4~(2-)吸附量较以有机质为主要可变电荷成分的土壤大12倍以上,且也随Ca~(2+)吸附量增加而增大。在前一种土壤中,Ca~(2+)离子的专性吸附随正电荷而增,并进而诱导对SO_4~(2-)离子的吸附。结果表明,在溶液
Bolan et al. Used a balance method and a column rinse experiment to compare sulfate adsorption of soil with Ca 2+ or K + ions. It was found that SO 2- When Ca 2+ is larger than K +, it increases with the increase of Ca 4+ adsorption amount and has a great relationship with variable charge components in soil. For hydration with Fe and Al The content of SO_4 ~ (2-) in soils with major variable charge composition was 12 times larger than that with organic matter as main variable charge composition, and also increased with the increase of Ca2 + adsorption Big. In the former soil, the specific adsorption of Ca2 + ions increases with the positive charge, and then induces the adsorption of SO4 2- ions. The results show that in solution