CAJ | 학술논문

研究了水稻土对Cu2＋的吸附反应动力学，并考察了pH和磷酸根2个因素对Cu2＋吸附的影响。结果表明：水稻土对 Cu2＋的吸附反应速率可明显分为快、慢2个阶段，快速阶段主要是Cu2＋结合在高亲和力位点，而慢速阶段则是结合在低亲和力位点。提高溶液pH可促进水稻土对Cu2＋的吸附，降低溶液pH则将抑制Cu2＋的吸附，这主要是因为pH可通过改变水稻土表面电荷的性质以及溶液Cu2＋的形态来影响吸附反应。提高离子强度，将降低低pH条件下Cu2＋的吸附量，而对高pH条件下Cu2＋的吸附量影响较小，这表明水稻土对Cu2＋存在很大比例的专性吸附。溶液中磷酸根的存在，可促进水稻土对Cu2＋的吸附。本文所得到的研究结果对认识Cu2＋在水稻土中的土壤环境行为及其污染控制有一定的理论意义。
연구료수도토대Cu2＋적흡부반응동역학，병고찰료pH화린산근2개인소대Cu2＋흡부적영향。결과표명：수도토대 Cu2＋적흡부반응속솔가명현분위쾌、만2개계단，쾌속계단주요시Cu2＋결합재고친화력위점，이만속계단칙시결합재저친화력위점。제고용액pH가촉진수도토대Cu2＋적흡부，강저용액pH칙장억제Cu2＋적흡부，저주요시인위pH가통과개변수도토표면전하적성질이급용액Cu2＋적형태래영향흡부반응。제고리자강도，장강저저pH조건하Cu2＋적흡부량，이대고pH조건하Cu2＋적흡부량영향교소，저표명수도토대Cu2＋존재흔대비례적전성흡부。용액중린산근적존재，가촉진수도토대Cu2＋적흡부。본문소득도적연구결과대인식Cu2＋재수도토중적토양배경행위급기오염공제유일정적이론의의。
Adsorption kinetics of Cu2+on paddy soil was investigated in this study together with the influence of pH and phos-phate.As the results shown,adsorption kinetics of Cu2+proceeded rapidly at the initial stage,followed by a slow process.The rapid adsorption was attributed to Cu2+binding to the high-affinity sites,while the slow process was due to the Cu2+binding to the low-affinity sites.Cu2+adsorption was favorable at high pH,inhibited with the decreasing the pH.It was explained that the surface charge of paddy soil was variable with the change in pH,and the chemical species of Cu2+in solutions were dependent on pH.The supporting electrolyte of NaClO4 under three concentrations affected Cu2+adsorption insignificantly within the range of pH studied,suggesting the specific adsorption of Cu2+onto paddy soil by formation surface inner-sphere complexes.The presence of P could promote the Cu2+adsorption.The results above were meaningful for understanding the en-vironmental behavior of Cu2+in soils and formulating the strategy of controlling soil Cu2+pollution.