The migration law of runoff pollutants in bio-retention tank was studied through the experimental research, containing calculation formula of pollutants reduction coefficient. After that, the technology of reducing an...The migration law of runoff pollutants in bio-retention tank was studied through the experimental research, containing calculation formula of pollutants reduction coefficient. After that, the technology of reducing and controlling runoff pollution by bio-retention tank was demonstrated. The result showed that bio-retention tank can reduce runoff by 15%-85%, and the pollutant emissions can be cut by 35%-95%. At the same time, it had good ecological landscape effect. The study can provide a reference for the design method of road bio-retention tank in sponge city construction, and basic technical methods and parameters for the subsequent construction of comprehensive control platform for urban rainwater runoff and the layout optimization of comprehensive measures of water quality and quantity.展开更多
Few studies have been carried out to connect nutrient recovery as struvite from wastewater and sustainable utilization of the recovered struvite for copper and zinc immobilization in contaminated soil.This study revea...Few studies have been carried out to connect nutrient recovery as struvite from wastewater and sustainable utilization of the recovered struvite for copper and zinc immobilization in contaminated soil.This study revealed the effect of struvite on Cu and Zn immobilization in contaminated bio-retention soil in the presence of commonly exuded plant organic acids.The research hypothesis was that the presence of both struvite and organic acids may influence the immobilization of Cu and Zn in soil.The outcome of this research confirmed that more than 99%of Cu and Zn was immobilized in bio-retention filter media by struvite application.Water-soluble Cu and Zn concentrations of struvite treated soil were less than 1.83 and 0.86 mg/kg respectively,and these concentrations were significantly lower compared to the total Cu and Zn content of 747.05 mg/kg in the contaminated soil.Application of struvite to Cu-and Zn-contaminated soil resulted in formation of compounds similar to zinc phosphate tetrahydrate(Zn3(PO4)2·4H2O)and amorphous Cu and Zn phases.Struvite was effective in heavy metal remediation in acidic soil regardless of the presence of Ca impurities in struvite and the presence of plant organic acids in soil.Overall,this study revealed that struvite recovered from wastewater treatment plants has potential for use as an amendment for heavy metal remediation in contaminated bio-retention soil.展开更多
基金Supported by National Water Project (2013ZX07304-001)。
文摘The migration law of runoff pollutants in bio-retention tank was studied through the experimental research, containing calculation formula of pollutants reduction coefficient. After that, the technology of reducing and controlling runoff pollution by bio-retention tank was demonstrated. The result showed that bio-retention tank can reduce runoff by 15%-85%, and the pollutant emissions can be cut by 35%-95%. At the same time, it had good ecological landscape effect. The study can provide a reference for the design method of road bio-retention tank in sponge city construction, and basic technical methods and parameters for the subsequent construction of comprehensive control platform for urban rainwater runoff and the layout optimization of comprehensive measures of water quality and quantity.
基金River Sands Pty Ltd.,Australia for providing the bioretention filter material for this experiment and for their supportfunded through the financial support of“Australian Government Research Training Program(RTP)Stipend”supported by generous funding from the Science and Engineer-ing Faculty(QUT)。
文摘Few studies have been carried out to connect nutrient recovery as struvite from wastewater and sustainable utilization of the recovered struvite for copper and zinc immobilization in contaminated soil.This study revealed the effect of struvite on Cu and Zn immobilization in contaminated bio-retention soil in the presence of commonly exuded plant organic acids.The research hypothesis was that the presence of both struvite and organic acids may influence the immobilization of Cu and Zn in soil.The outcome of this research confirmed that more than 99%of Cu and Zn was immobilized in bio-retention filter media by struvite application.Water-soluble Cu and Zn concentrations of struvite treated soil were less than 1.83 and 0.86 mg/kg respectively,and these concentrations were significantly lower compared to the total Cu and Zn content of 747.05 mg/kg in the contaminated soil.Application of struvite to Cu-and Zn-contaminated soil resulted in formation of compounds similar to zinc phosphate tetrahydrate(Zn3(PO4)2·4H2O)and amorphous Cu and Zn phases.Struvite was effective in heavy metal remediation in acidic soil regardless of the presence of Ca impurities in struvite and the presence of plant organic acids in soil.Overall,this study revealed that struvite recovered from wastewater treatment plants has potential for use as an amendment for heavy metal remediation in contaminated bio-retention soil.
