节水灌溉Issue(9)：1-8,8.DOI:10.12396/jsgg.2026026
不同水质灌溉下土壤吸附Cu2+、Zn2+特性:多因素耦合效应
Characteristics of Soil Adsorption for Cu2+and Zn2+Under Irrigation with Different Water Qualities:The Effect of Multiple Factors Working in Combination
摘要
Abstract
To address agricultural water scarcity in northern arid regions and ensure the safety of unconventional water irrigation,this study investigates the retention characteristics of Cu2+and Zn2+in soil under irrigation with different water qualities,along with key influencing factors.Using sandy soil as the research subject,isothermal adsorption experiments,single-factor experiments(pH,salinity,dissolved organic matter—DOM),and multi-factor coupling experiments were conducted.The adsorption characteristics were analyzed using Langmuir,Freundlich,and Temkin models,and the interactions among multiple factors were examined using the Box – Behnken response surface methodology.The soil Zn2+retention capacity under different water quality irrigation was in the following order:brackish water>pure water>reclaimed water>tap water;for Cu2+,the order was:reclaimed water>brackish water>tap water>pure water.pH was the key factor dominating the adsorption process,with Cu2+achieving a removal rate of 99.99%at pH=7,while Zn2+approached complete removal at pH=9.Salinity exhibited a slight promoting effect on adsorption within the range of 200~3 000 mg/L.The removal rates of Zn2+and Cu2+from the soil by DOM generally showed a tendency to decrease;however,at low concentrations of Dissolved Organic Matter(DOM),the removal rate of Cu2+from the soil increased.Multi-factor coupling analysis indicated that the order of influence of the three factors was:pH>DOM>salinity.The findings of this study provide a theoretical basis and decision-making support for risk assessment and water quality regulation in unconventional water irrigation.关键词
土壤吸附/再生水/微咸水/水质调控/多因素耦合效应Key words
soil adsorption/reclaimed water/brackish water/water quality regulation/multi-factor coupling effects分类
农业科技引用本文复制引用
柴猛,陈光宇,曹倡铭,陈媛媛,岳卫峰,李卫平,屈忠义..不同水质灌溉下土壤吸附Cu2+、Zn2+特性:多因素耦合效应[J].节水灌溉,2026,(9):1-8,8.基金项目
国家自然科学基金项目(U24A20179,52579032). （U24A20179,52579032）
