Next Article in Journal
Determining the Risk Level of Heavy Rain Damage by Region in South Korea
Previous Article in Journal
Significant Temporal and Spatial Variability in Nutrient Concentrations in a Chinese Eutrophic Shallow Lake and Its Major Tributaries
Article

The Effect of Fe(II), Fe(III), Al(III), Ca(II) and Mg(II) on Electrocoagulation of As(V)

Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editors: Alexandre T. Paulino and Sergi Garcia-Segura
Water 2022, 14(2), 215; https://doi.org/10.3390/w14020215
Received: 12 November 2021 / Revised: 6 January 2022 / Accepted: 11 January 2022 / Published: 12 January 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
The interaction between metal chlorides and electrocoagulation was tested. Precipitation of As(V) was found to be optimal at pH 4.9 using FeCl2, 2.6 for FeCl3, 3.8 using AlCl3, 11.6 using CaCl2 and 8.6 using MgCl2. As(V) removal through electrocoagulation went down as initial pH (pHi) of the solution increased. Addition of FeCl2 increased removal of As(V) at all pHi but was not able to achieve full removal at pHi 7. FeCl3 had a similar effect but a lower Fe(III) concentration of 30 mg/L was not sufficient for full removal at pHi 5 either. AlCl3 addition reduced removal efficiency at pHi 3 but removed all or most As(V) through precipitation at pHi 5 and 7, with complete removal followed through electrocoagulation. The addition of CaCl2 and MgCl2 resulted in nearly identical behavior. Addition of either at pHi 3 had no influence, but at pHi 5 and 7 caused complete removal to take place. View Full-Text
Keywords: arsenic(V); electrocoagulation; precipitation; adsorption; wastewater; treatment; conductivity arsenic(V); electrocoagulation; precipitation; adsorption; wastewater; treatment; conductivity
Show Figures

Figure 1

MDPI and ACS Style

Moed, N.M.; Ku, Y. The Effect of Fe(II), Fe(III), Al(III), Ca(II) and Mg(II) on Electrocoagulation of As(V). Water 2022, 14, 215. https://doi.org/10.3390/w14020215

AMA Style

Moed NM, Ku Y. The Effect of Fe(II), Fe(III), Al(III), Ca(II) and Mg(II) on Electrocoagulation of As(V). Water. 2022; 14(2):215. https://doi.org/10.3390/w14020215

Chicago/Turabian Style

Moed, Niels M., and Young Ku. 2022. "The Effect of Fe(II), Fe(III), Al(III), Ca(II) and Mg(II) on Electrocoagulation of As(V)" Water 14, no. 2: 215. https://doi.org/10.3390/w14020215

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop