CAJ | 학술논문

采用实验室土柱纵向淋溶法，研究了离子强度及pH变化对常熟乌栅土原状、扰动土柱以及东北黑土、江西红壤扰动土柱土壤胶体释放的影响。结果表明离子强度变化对我国不同类型土壤胶体释放影响不同：淋洗液电解质为NaCl时，对于常熟乌栅土以及东北黑土，离子强度减小促进胶体的释放，反之抑制胶体的释放；对于江西红壤，离子强度变化对土壤胶体释放则不产生影响。淋洗液电解质为CaCl2条件下，土壤胶体的释放量低于淋洗液为NaCl，且离子强度变化对三种土壤胶体的释放均不产生明显影响。相同条件下，常熟乌栅土及东北黑土胶体释放量远远大于江西红壤，pH变化则对上述类型土壤胶体释放的影响不明显。研究结果有助于进一步阐明水化学条件的变化对我国不同类型土壤胶体释放的影响规律。
채용실험실토주종향림용법，연구료리자강도급pH변화대상숙오책토원상、우동토주이급동북흑토、강서홍양우동토주토양효체석방적영향。결과표명리자강도변화대아국불동류형토양효체석방영향불동：림세액전해질위NaCl시，대우상숙오책토이급동북흑토，리자강도감소촉진효체적석방，반지억제효체적석방；대우강서홍양，리자강도변화대토양효체석방칙불산생영향。림세액전해질위CaCl2조건하，토양효체적석방량저우림세액위NaCl，차리자강도변화대삼충토양효체적석방균불산생명현영향。상동조건하，상숙오책토급동북흑토효체석방량원원대우강서홍양，pH변화칙대상술류형토양효체석방적영향불명현。연구결과유조우진일보천명수화학조건적변화대아국불동류형토양효체석방적영향규률。
Colloid mobilization would facilitate pollutant transport in the environment. In laboratory, leaching experiments were performed to investigate the effects of ionic strength and pH on colloid release from undisturbed and disturbed Wushan soil columns from Changshu, dis-turbed black soil column from northeast China(Dongbei)and disturbed red soil column from Jiangxi. The effects of ionic strength on colloid release were significantly different in various soils. In the electrolyte NaCl system, increasing ionic strength obviously reduced the release capacity of soil colloids for Changshu Wushan soil and Dongbei black soil, while ionic strength had little effects on collois release in Jiangxi red soil. In electrolyte CaCl2 system, however, ionic strength had no significant impacts on soil collois release. Moreover, colloid release was much smaller in CaCl2 than in NaCl. Under the same conditions of solution chemistry, the amount of colloid released was far greater in Changshu Wushan soil and Dongbei black soil than in Jiangxi red soil. pH showed little influence on colloid release. The research findings would be useful for further understanding the impacts of water chemical conditions on colloid release of different soils.