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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 22, No. 7, 2018, pp. 1065-1070
Bioline Code: ja18182
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 22, No. 7, 2018, pp. 1065-1070

 en Biodegradation of Naphthalene using Pseudomonas putida check for this species in other resources and Bacillus subtilis check for this species in other resources Immobilized on Snail Shell
AINA, OE; AGBAJI, EB & NWOKEM, NC

Abstract

This study investigated snail shell as a carrier to immobilize Pseudomonas putida and Bacillus subtilis isolated from refinery effluent for the degradation of naphthalene in synthetic wastewater at various process conditions such as initial naphthalene concentration, pH, adsorbent dosage and ambient temperature of 30 oC in batch mode. The results showed that the adsorption and the biodegradation capacity increased with increase in naphthalene concentration, where 73.11%, 74.46% and 65.20% of the optimum concentration (50 mg/L) were removed by immobilized Pseudomonas putida, Bacillus subtilis, and snail shell respectively after 72 hours incubation. The optimal degradation occurred at the adsorbent dosage of 2 g at pH 9 and pH 7 for the adsorption and biodegradation respectively. The results were well fitted to both Langmuir and Freundlich models. Therefore, snail shell can be employed as a low-cost adsorbent and solid support matrix for immobilizing microorganisms in remediating hydrocarbon contaminants.

Keywords
Biodegradation; Naphthalene; Immobilization; Snail shell.

 
© Copyright 2018 - Aina et al.

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