THE ADSORPTIVE PROPERTIES OF FIRED CLAY PELLETS FOR THE REMOVAL OF PHOSPHATE IN WASTEWATER TREATMENT
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN BIO-INFORMATICS, BIO-TECHNOLOGY AND ENVIRONMENTAL ENGINEERING
Author(s): ADRIAN WOOD , AUGUSTINE O. IFELEBUEGU , MARK J. BATEMAN
Abstract: Removal of phosphate in wastewater treatment is crucial to reducing nutrient enrichment and eutrophication of aquatic bodies. This study explored the potential of fired clay pellets for use in phosphate removal during wastewater treatment. The mechanism of removal was evaluated in a batch adsorption study under different experimental conditions. Fired clay pellets were found to be effective in the adsorptive removal of phosphate from aqueous solution with a maximum adsorption capacity of 144mg/g. The experimental data showed a good fit to the pseudo-first-order kinetic model indicating a physical nature of the sorption process and also followed Dubinin-Radushkeivich Isotherm model. Adsorption of phosphate favoured acidic pH with optimum removal at pH 3-4. The values of Gibbs free energy (-16.5 kJ/mol), enthalpy (-8.87 kJ/mol) indicated adsorption was spontaneous and exothermic. The mechanism was found to be predominantly physisorption supported by some diffusion.
- Publication Date: 18-Mar-2016
- DOI: 10.15224/978-1-63248-091-0-05
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IMPROVED CASHEW PLANTING MATERIAL PRODUCTION IN BENIN, A CASE STUDY OF NEW GRAFTING PROCESS
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN BIO-INFORMATICS, BIO-TECHNOLOGY AND ENVIRONMENTAL ENGINEERING
Author(s): K. , N'DJOLOSSE , M. A. , TANDJIEKPON , R. , MALIKI , S. , KODJO
Abstract: Cashew is an important cash crop in Benin. Currently the average production per hectare is 300- 500 kg i-e 3-5kg/tree, which is low compared to other countries like Tanzania with an average productivity of 15-20kg/tree. Low yield is mainly due to use of unimproved cashew planting materials. Benin government made efforts to ensure improved planting materials availability. However, improved cashew planting material production remains a big challenge because the use of seeds does not guarantee farmer getting true type cashew planting materials. Grafting technique has been adopted in cashew propagation but low success rates (50% - 70%) in grafting were a limiting factor. Softwood grafting technique has been developed and experimented for promoting cashew propagation materials. But due to low success rate obtained by grafters, many were forced to stop grafting. A new grafting process has been developed which enabled success rates to increase more than 51% (55.3% to 83.6%). This process incl
- Publication Date: 18-Mar-2016
- DOI: 10.15224/978-1-63248-091-0-06
- Views: 0
- Downloads: 0