{"title":"Distribution of chemical fractions of Pb in wastewater in mixed substrates of constructed wetlands","authors":"L. Tao, Zheng-Ru Fu, Jun Ren, Yamei Gao","doi":"10.1109/GIWRM.2012.6349666","DOIUrl":null,"url":null,"abstract":"In this study, the wastewater containing 10mg/L lead was treated by five different kinds of mixed substrates of constructed wetlands. The results indicated: (1) For total Pb, substrates 1, 4 and 5 showed significantly higher capacity than other kinds; (2) In five fractions, bound to Fe-Mn oxides and residual Pb were treated with higher efficiency than other fractions; (3) There were significant changes between the content of total Pb and that of five fractions in substrate 5; (4) Bound to carbonates and residual Pb showed an upward trend, but exchangeable and bound to OM Pb showed upward trend firstly, and then showed downward trend. The bound to Fe-Mn oxdies fraction Pb showed downward trend.","PeriodicalId":6394,"journal":{"name":"2012 International Symposium on Geomatics for Integrated Water Resource Management","volume":"27 1","pages":"1-4"},"PeriodicalIF":0.0000,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2012 International Symposium on Geomatics for Integrated Water Resource Management","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/GIWRM.2012.6349666","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
In this study, the wastewater containing 10mg/L lead was treated by five different kinds of mixed substrates of constructed wetlands. The results indicated: (1) For total Pb, substrates 1, 4 and 5 showed significantly higher capacity than other kinds; (2) In five fractions, bound to Fe-Mn oxides and residual Pb were treated with higher efficiency than other fractions; (3) There were significant changes between the content of total Pb and that of five fractions in substrate 5; (4) Bound to carbonates and residual Pb showed an upward trend, but exchangeable and bound to OM Pb showed upward trend firstly, and then showed downward trend. The bound to Fe-Mn oxdies fraction Pb showed downward trend.
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