Zinc Removal From The Industrial Wastewater Using Activated Carbon Synthesized From Mangrove
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Date
2021-06-01
Authors
Samsudin, Nur Fitri Syafiqah
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Most of wastewater effluent contains dangerous heavy metals that must be
appropriately handled. Heavy metal pollution is a serious problem in developing countries, as
most industrial operations have increased heavy metal contamination in lakes, rivers, and other
water sources. Thus, a substantial amount of research has been performed on low-cost
adsorbents to examine their potential in heavy metal removal. As a result, a summary and
assessment of mangrove as a low-cost adsorbent have been completed in this report. This study
assesses the potential of activated carbon derived from mangroves for the removal of a specific
heavy metal, zinc. Aside from that, the examination of the key factors that impact heavy metal
removal, which are the effect of temperature, initial concentration, and contact duration on
heavy metal removal, is also being examined. The adsorption capacity increased with the
increase of initial concentration of Zn2+ from 1 ppm to 7 ppm resulted in an increase in
adsorption capacity from 0.1604 mg/g to 1.1627 mg/g. As the temperature raised from 30°C to
60°C, the adsorption capability of Zn2+ were decreased indicating the process was exothermic.
The capacity for Zn2+ adsorption reduced from 1.241 mg/g to 1.1627 mg/g as the temperature
increased. For adsorption isotherm model, Freundlich isotherm model at temperature of 60°C
is more suitable to describe Zn2+ adsorption on mangrove activated carbon due to higher
correlation coefficient, R2value at 0.5984. The correlation coefficient, R2 from the pseudo-second
order model for Zn2+ adsorption was 0.9959 which is higher than pseudo-first order
model, 0.9695. This indicate that pseudo-second order is more suitable more kinetic adsorption
model for Zn2+ adsorption.