{"title":"Combined Settlement and Clogging in Drainage Sand Layer for Suspended Solids, Colloids and Inorganic Salts","authors":"Jiayu Ma, H. Lu, Kaifan Li, Meng Liu","doi":"10.1139/cjce-2023-0064","DOIUrl":null,"url":null,"abstract":"A combined sedimentation test of suspended solids, colloids, and inorganic salts and a sand column blocking test were conducted, and mineral composition and grain characteristics of sediments were determined. Adsorption and flocculation reactions occurred in colloids (silver iodide) and inorganic salts (calcium chloride or aluminum sulfate), and final products were flocculation or flocculent network polymers. This increased the sedimentation rate of suspended matter by 8–18 times. Combined migration of suspended solids, colloids (silver iodide), and inorganic salts (calcium chloride or aluminum sulfate) significantly exacerbated silting of sand columns. Compared with sand column silting caused by pure SS, this combined migration more than halved sand column silting time and reduced hydraulic conductivity by nearly one order of magnitude.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":"4 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian Journal of Civil Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1139/cjce-2023-0064","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
A combined sedimentation test of suspended solids, colloids, and inorganic salts and a sand column blocking test were conducted, and mineral composition and grain characteristics of sediments were determined. Adsorption and flocculation reactions occurred in colloids (silver iodide) and inorganic salts (calcium chloride or aluminum sulfate), and final products were flocculation or flocculent network polymers. This increased the sedimentation rate of suspended matter by 8–18 times. Combined migration of suspended solids, colloids (silver iodide), and inorganic salts (calcium chloride or aluminum sulfate) significantly exacerbated silting of sand columns. Compared with sand column silting caused by pure SS, this combined migration more than halved sand column silting time and reduced hydraulic conductivity by nearly one order of magnitude.
期刊介绍：
The Canadian Journal of Civil Engineering is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structural engineering, construction engineering, engineering mechanics, engineering materials, and history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academia. New developments in engineering design and construction are also featured.
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