Comparative study on open system digestion and microwave assisted digestion methods for metal determination in shrimp sludge compost

Nemati, K. and Bakar, Nor Kartini Abu and Abas, M.R. and Sobhanzadeh, E. and Low, K.H. (2010) Comparative study on open system digestion and microwave assisted digestion methods for metal determination in shrimp sludge compost. Journal of Hazardous Materials, 182 (1-3). pp. 453-459. ISSN 03043894, DOI

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The aim of this work was to evaluate two different digestion methods for the determination of the total concentration of metals (Zn, Cu, Cr, Ni, Pb and Cd) in shrimp sludge compost. The compost made from shrimp aquaculture sludge co-composted with organic materials (peat, crushed bark and manure) was used as an organic growing medium for crop. Open system digestion and microwave assisted digestion procedures were employed in sample preparation. Various combinations and volumes of hydrofluoric, nitric and hydrochloric acids were evaluated for the efficiency of both methods. A certified reference material (CRM 146) was used in the comparison of these two digestion methods. The results revealed a good agreement between both procedures and the certified valued. The best recoveries were found in the range between 95 and 99 for microwave assisted digestion with a mixture of 2ml of HF, 6ml of HNO3 and 2ml of HCl. This procedure was recommended as the method for digestion the compost herein based on the recovery analysis and time taken.

Item Type: Article
Uncontrolled Keywords: Composted Microwave assisted digestion Open system digestion Shrimp aquaculture sludge Certified reference materials Comparative studies Concentration of Digestion method Metal determination Organic materials Sample preparation Shrimp aquaculture Agriculture Aquaculture Cadmium Chromium Composting Copper Hydrochloric acid Hydrofluoric acid Lead Manures Metal recovery Microwaves Open systems Pollution Zinc Sludge digestion nickel nitric acid comparative study compost concentration (composition) crop production digestibility inorganic acid microwave radiation organic matter shrimp culture sludge article atomic absorption spectrometry heavy metal removal reference value shrimp validation process Animals Crustacea Limit of Detection Metals Reference Standards Sewage Soil Spectrophotometry, Atomic Decapoda (Crustacea)
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Department of Chemistry
Depositing User: miss munirah saadom
Date Deposited: 02 Jul 2013 01:21
Last Modified: 28 Aug 2019 03:07

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