title: Application of QUAL2K model to assess ecological purification technology for a polluted river.
abstract: Industrialization and urbanization have caused water pollution and ecosystem degradation, especially in urban canals and rivers in China; accordingly, effective water quality improvement programs are needed. In this study, the Tianlai River in Jiangsu, China was taken as a research site, and a combination of ecological purification technologies consisting of biological rope, phytoremediation, and activated carbon were applied in a laboratory-scale study to examine degradation coefficients under dynamic water conditions. Coefficients were then input into the QUAL2K model to simulate various hypothetical scenarios and determine the minimum density of ecological purification combination and hydraulic retention time (HRT) to meet Grade V or IV of the China standard for surface water. The minimum densities for Grade V and IV were 1.6 times and 2 times the experimental density, while the minimum HRTs for Grade V and IV were 2.4 day and 3 day. The results of this study should provide a practical and efficient design method for ecological purification programs.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China. dtzwt1987@126.com.
authors.forename: Wenting
authors.initials: W
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China. 0212.gloria@gmail.com.
authors.forename: Qian
authors.initials: Q
authors.lastname: Niu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China. zhangrb88@126.com.
authors.forename: Ruibin
authors.initials: R
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China. rui.ye0220@163.com.
authors.forename: Rui
authors.initials: R
authors.lastname: Ye
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China. xqian@nju.edu.cn.
authors.forename: Xin
authors.initials: X
authors.lastname: Qian
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, China. yqian@nju.edu.cn.
authors.forename: Yu
authors.initials: Y
authors.lastname: Qian
mesh_terms: D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008962:Models, Theoretical; D045483:Rivers; D014507:Urbanization; D014876:Water Pollution; D018508:Water Purification / Q000379:methods; D060753:Water Quality