Subsurface flow constructed wetlands for treating of simulated cadmium ions-wastewater with presence of Canna indica and Typha domingensis

被引：12
作者：
Faisal A.A.H. [1 ]
Taha D.S. [1 ]
Hassan W.H. [2 ,3 ]
Lakhera S.K. [4 ]
Ansar S. [5 ]
Pradhan S. [6 ]
机构：
[1] Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad
[2] College of Engineering, University of Warith Al-Anbiyaa, Kerbala
[3] Department of Civil Engineering, College of Engineering, University of Kerbala, Kerbala
[4] Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Tamil Nadu, Kattankulathur
[5] Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh
[6] Department of Chemistry, College of Sciences and Engineering, Idaho State University
来源：
Chemosphere | 2023年 / 338卷
关键词：
Canna indica; Constructed wetland; Typha domingensis; Vertical subsurface flow; Wastewater;
D O I：
10.1016/j.chemosphere.2023.139469
中图分类号：
学科分类号：
摘要：
The presence of toxic cadmium ions in the wastewater resulted from industrial sector forms the critical issue for public health and ecosystem. This study determines the ability of four vertical subsurface flow constructed wetlands units in the treatment of simulated wastewater laden with cadmium ions. This was achieved through using sewage sludge byproduct as alternative for the traditional sand to be substrate for aforementioned units in order to satisfy the sustainable concepts; however, Canna indica and Typha domingensis can apply to enhance the cadmium removal. The performance of constructed wetlands has been evaluated through monitoring of the pH, dissolved oxygen (DO), temperature, and concentrations of cadmium (Cd) in the effluents for retention time (0.5–120 h) and metal concentration (5–40 mg/L). The results demonstrated that the Cd removal percentage was exceeded 82% beyond 5 days and for concentration of 5 mg/L; however, this percentage was decreased with smaller retention time and higher metal concentration. The Grau second-order kinetic model accurately simulated the measurements of effluent Cd concentrations as a function of retention times. The FT-IR analysis indicated the existence of certain functional groups capable of enhancing the Cd removal. The treated wastewater's pH, DO, temperature, total dissolved solids (TDS), and electrical conductivity (EC) all meet the requirements for irrigation water. © 2023
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