TY - JOUR
T1 - Hydrogen Sulfide Removal from Downstream Wastewater Using Calcium-Coated Wood Sawdust-Based Activated Carbon
AU - Habeeb, Omar Abed
AU - Olalere, Olusegun Abayomi
AU - Kanthasamy, Ramesh
AU - Ayodele, Bamidele Victor
N1 - Funding Information:
This work was funded by the Faculty of Chemical and Natural Resources Engineering, University Malaysia Pahang, through a local research grant scheme (ERGS) no. RDU130618.
Funding Information:
This work was funded by the Faculty of Chemical and Natural Resources Engineering, University Malaysia Pahang, through a local research grant scheme (ERGS) no. RDU130618.
Publisher Copyright:
© 2019, King Fahd University of Petroleum & Minerals.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - Hydrogen sulfide is very toxic and dangerous. It can be observed in a huge amount in petroleum wastewater. In this study, residual wood sawdust was chemically modified by potassium hydroxide to produce wood sawdust activated carbon (ACWSD) and subsequently coated with calcium (Ca) extracted from eggshell. The Ca-coated ACWSD was applied in the sorption of dissolved H2S and its ions (HS− and S2−) from simulated wastewater. Response surface methodology was employed to investigate the impact of various variables such as calcination temperature, concentration of calcium solution, and calcination contact time on the responses. The result showed that the highest adsorption capacity and product of impregnated activated carbon (IAC) were obtained at the following optimum conditions: calcination temperature of 890.86 °C, calcium concentration in the solution of 49 v%, and impregnated contact time of 61.58 min for the preparation of Ca-ACWSD, resulting in the highest removal efficiency (RE%) and IAC yield % of 96.86% and 30.161%, respectively. X-ray powder diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopies were used to confirm the physicochemical properties of the Ca-ACWSD adsorbent. Modified activated carbon has higher RE % compared with unimpregnated one. Freundlich isotherm model is more fitted to adsorption capacity. The result IAC has shown the best performance for the removal of these priority water pollutants.
AB - Hydrogen sulfide is very toxic and dangerous. It can be observed in a huge amount in petroleum wastewater. In this study, residual wood sawdust was chemically modified by potassium hydroxide to produce wood sawdust activated carbon (ACWSD) and subsequently coated with calcium (Ca) extracted from eggshell. The Ca-coated ACWSD was applied in the sorption of dissolved H2S and its ions (HS− and S2−) from simulated wastewater. Response surface methodology was employed to investigate the impact of various variables such as calcination temperature, concentration of calcium solution, and calcination contact time on the responses. The result showed that the highest adsorption capacity and product of impregnated activated carbon (IAC) were obtained at the following optimum conditions: calcination temperature of 890.86 °C, calcium concentration in the solution of 49 v%, and impregnated contact time of 61.58 min for the preparation of Ca-ACWSD, resulting in the highest removal efficiency (RE%) and IAC yield % of 96.86% and 30.161%, respectively. X-ray powder diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopies were used to confirm the physicochemical properties of the Ca-ACWSD adsorbent. Modified activated carbon has higher RE % compared with unimpregnated one. Freundlich isotherm model is more fitted to adsorption capacity. The result IAC has shown the best performance for the removal of these priority water pollutants.
KW - Activated carbon
KW - Eggshell
KW - Hydrogen sulfide
KW - Isotherm model
KW - Response surface methodology
UR - http://www.scopus.com/inward/record.url?scp=85074635131&partnerID=8YFLogxK
U2 - 10.1007/s13369-019-04207-9
DO - 10.1007/s13369-019-04207-9
M3 - Article
AN - SCOPUS:85074635131
VL - 45
SP - 501
EP - 518
JO - Arabian Journal for Science and Engineering
JF - Arabian Journal for Science and Engineering
SN - 2193-567X
IS - 2
ER -