Comparative Studies of Adsorption of Heavy Metals from Cement Waste Water Using Activated Carbon from Palm Kernel Husk, Coconut and Groundnut Shells

Cement waste water is a major source of heavy metal pollution which requires removal before disposal. This paper therefore evaluates the comparative adsorption of heavy metals from cement waste water using activated carbon from palm kernel husk, coconut and groundnut shells in line with standard met...

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Bibliographic Details
Published in:Journal of Applied Sciences and Environmental Management 2019-11, Vol.23 (5), p.967-975
Main Authors: ODISU, T, EDOMWONYI-OTU, LC, ANIH, EC
Format: Article
Language:English
Subjects:
Activated carbon
Adsorbents
Adsorption
Cement
Cement plants
Chemical engineering
Comparative analysis
Comparative studies
Concrete
Groundnuts
Heavy metals
heavy-metals adsorption
Iron
Kernels
Metal industry wastewaters
Nickel
Pollutant removal
R&D
Research & development
Shells
Temperature
Waste disposal
Waste treatment
waste- water
Wastewater
Water pollution
Water treatment
Zinc
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Summary:Cement waste water is a major source of heavy metal pollution which requires removal before disposal. This paper therefore evaluates the comparative adsorption of heavy metals from cement waste water using activated carbon from palm kernel husk, coconut and groundnut shells in line with standard methods. With 0.1M KOH as activating agent at 400 oC, PKH and GNS reduced zinc concentration in water from 0.06mg/l to 0.01mg/l while CCS reduced iron concentration by 50% for temperature range of 450 oC - 500 oC. However, when 0.1M ZnCl was used as activating agent, all three adsorbents reduced the concentration of Zn, Fe and Pb to 0.01mg/l within the temperature range of 400 oC - 450 oC while Nickel was substantially reduced to 0.01mg/l by all three adsorbents with 0.2M ZnCl as activating agent for temperature range of 400 oC to 500 oC. The result shows that all three materials could serve as adsorbents but their performance depends on temperature and activating agents. For palm kernel husk and coconut shell, their performance was inversely proportional to temperature, while groundnut shell shows a direct relationship. On the overall, the three precursors showed capacity as good adsorbent for treatment of cement waste- water.
ISSN:1119-8362
2659-1502
2659-1499
DOI:10.4314/jasem.v23i5.30