Heavy Metals Removal from Simulated Wastewater using Horizontal Subsurface Constructed Wetland

Journal of Ecological Engineering

Khalid M. Abed¹  Mohanad J. M-Ridha²  Suhair L. Zeki²  Sabah J. Mohammed²  Hassimi Abu Hasan³ 

[1] Department of Chemical Engineering, College of Engineering, University of Baghdad, Iraq;Department of Environmental Engineering, College of Engineering, University of Baghdad, Iraq;Research Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;

关键词: nerium oleander;    phytoremediation;    heavy metal removal;    horizontal subsurface constructed wetland;    waste treatment;   

DOI  :  10.12911/22998993/138869

来源: DOAJ

【 摘 要 】

This study aimed to assess the efficiency of Nerium oleander in removing three different metals (Cd, Cu, and Ni) from simulated wastewater using horizontal subsurface flow constructed wetland (HSSF-CW) system. The HSSF-CW pilot scale was operated at two hydraulic retention times (HRTs) of 4 and 7 days, filled with a substrate layer of sand and gravel. The results indicated that the HSSF-CW had high removal efficiency of Cd and Cu. A higher HRT (7 days) resulted in greater removal efficiency reaching up to (99.3% Cd, 99.5% Cu, 86.3% Ni) compared to 4 days. The substrate played a significant role in removal of metals due to adsorption and precipitation. The N. oleander plant also showed a good tolerance to the uptake of Cd, Cu, and Ni ions from water. The highest removal of the heavy metals indicated that the HSSF-CW would be a promising technology for heavy metal contaminated wastewater as well as in electroplating and manufacturing industries.

【 授权许可】

Unknown