Soil aggregation plays an important role in agricultural production activities.However,the structure of soil aggregation is destroyed by the natural environment and unreasonable farming management,resulting in the loss of water,fertilizers and pesticides in soil.At present,hydrogels have been widely reported to promote the formation of soil aggrega-tion.In this paper,amphiphilic calcium alginate (ASA/Ca2+) was applied to promote the for-mation of soil aggregation and enhance pesticide retention.Initially,an ASA was obtained through the one-pot Ugi condensation (a four-component green chemical reaction).Then,ASA/Ca2+ hydrogel is prepared by Ca2+ cross-linking.The formation of soil aggregation was determined through the Turbiscan Lab Expert stability analyzer,Confocal Laser Scanning Microscope (CLSM),and Transmission Electron Microscope (TEM).And the effect of soil ag-gregation on acetamiprid environmental behavior was investigated by adsorption kinetics,adsorption isotherms,and leaching.The results shown that the three-dimensional network structure of ASA/Ca2+ hydrogel can promote the formation of soil aggregation.Aggregate durability index (ADI) was 0.55 in the presence of ASA/Ca2+ hydrogel,indicating that am-phiphilic hydrogel can enhance the stability of soil aggregation.The adsorbing capacity of acetamiprid was 1.58 times higher than pure soil,and the release of acetamiprid only about 20％ in the presence of ASA/Ca2+ hydrogel.These results would be helpful for the formation of soil aggregation and pesticides adsorption on soil aggregation.Thus,ASA/Ca2+ hydrogel is likely to improve soil quality,simultaneously it can minimize the mobility of pesticides in the agricultural system.

Siqi Zhang;Furui He;Xiuqin Fang;Xinyu Zhao;Yuanyuan Liu;Gaobo Yu;Yang Zhou;Yuhong Feng;Jiacheng Li

Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemical Engineering and Technology,Hainan University,Hainan 570228,China

环境科学学报（英文版）

[1]Siqi Zhang;Furui He;Xiuqin Fang;Xinyu Zhao;Yuanyuan Liu;Gaobo Yu;Yang Zhou;Yuhong Feng;Jiacheng Li-.Enhancing soil aggregation and acetamiprid adsorption by ecofriendly polysaccharides hydrogel based on Ca2+-amphiphilic sodium alginate)[J].环境科学学报（英文版）,2022(03):55-63

acetamiprid,phiphilic

Enhancing,soil,aggregation,adsorption,by,ecofriendly,polysaccharides,Ca2+,amphiphilic,sodium,alginate,Soil,plays,important,role,agricultural,production,activities,However,structure,destroyed,natural,unreasonable,farming,management,resulting,loss,water,fertilizers,pesticides,At,present,hydrogels,have,been,widely,reported,promote,formation,this,paper,calcium,ASA,was,applied,enhance,retention,Initially,obtained,through,pot,Ugi,condensation,four,component,green,chemical,reaction,Then,prepared,cross,linking,determined,Turbiscan,Lab,Expert,stability,analyzer,Confocal,Laser,Scanning,Microscope,CLSM,Transmission,Electron,TEM,And,effect,environmental,behavior,investigated,kinetics,isotherms,leaching,results,shown,that,three,dimensional,network,Aggregate,durability,ADI,presence,indicating,adsorbing,capacity,times,higher,than,pure,release,only,about,These,would,helpful,Thus,likely,improve,quality,simultaneously,minimize,mobility,system

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