Abstract
The removal efficiency of activated carbons prepared from rice husk and coconut shell in the adsorption of methylene blue (azo dye) from the synthetic industrial wastewater was investigated in a batch system. Rice husk and coconut shell were both processed into activated carbon by carbonizing at 600 oC and activated with 3.0 M H3PO4 at 80 oC for 3h. Synthetic solutions of methylene blue were prepared and the adsorption process was carried out by varying initial, methylene blue concentration, adsorbent dosage, and contact. The results showed that higher values of adsorbent dosage and contact time favored the adsorption of methylene blue from the simulated waste water. Activated carbon from coconut shell proved a better adsorbent compared to the activated carbon obtained from rice husk as coconut shell has the highest percentage removal for methylene blue.
Highlights
Synthetic dyes are organic compounds widely used in the textiles, rubber, paper, plastics, cosmetic, and leather industries (Ali et al, 2012; Bhatnagar and Sillanpää, 2010; Yagub et al, 2014)
This study focuses on the comparative analysis of the performance of activated carbon produced from two industrial waste namely rice husk and coconut shell modified with H2PO4 used for the adsorption of methylene blue from a synthesized industrial wastewater in a batch system
The trends observed for the removal of the methylene blue using adsorbent derived from rice husk revealed that the adsorption of methylene blue at room temperature is favoured at a higher concentration (Hameed et al, 2008)
Summary
Synthetic dyes are organic compounds widely used in the textiles, rubber, paper, plastics, cosmetic, and leather industries (Ali et al, 2012; Bhatnagar and Sillanpää, 2010; Yagub et al, 2014). The addition of dyes into water bodies often lead to unpleasant colouration of the water surface which usually hinders penetrations of sun lights needed for photochemical and biological activities by the aquatic life (Ertugay and Acar, 2017; Mittal et al, 2014). It is expedients for the proper treatment of industrial wastewater containing dyes prior to discharging them into water bodies in order abate environmental pollution. This study focuses on the comparative analysis of the performance of activated carbon produced from two industrial waste namely rice husk and coconut shell modified with H2PO4 used for the adsorption of methylene blue from a synthesized industrial wastewater in a batch system
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