Urea Impregnated Biochar to Minimize Nutrients Loss in Paddy Soils

Dimin, Mohd Fairuz and Se, SianMeng and Shaaban, Azizah (2013) Urea Impregnated Biochar to Minimize Nutrients Loss in Paddy Soils. In: Proceedings of Malaysian Technical Universities Conference on Engineering & Technology (MUCET) , 3-4/12/2013, Kuantan, Pahang, Malaysia. (Submitted)

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Abstract

Rubber wood sawdust (RWSD) is converted into porous formed of biochar through the slow pyrolysis process. In this study, it was used as a green binder to bind the urea together and formed a fertilizer. The biochars were produced at heating temperature 300 °C and 700 °C for 3 hours with continued nitrogen purge of 30 ml/min and heating rate was constant at 5 °C/min. The obtained biochars were characterized by XRD, Boehm titration, pH alkalinity, BET specific surface area and SEM. Boehm Titration demonstrated reduction of acidic functional groups with the increased of heating temperature, recorded 1.3 and 0.3 mmol/g respectively for 300 °C and 700 °C. Conversely, biochar produced at higher temperature was reported to have larger specific surface area with 5.4 m2/g. The impregnation was carried out on both biochars produced with molten urea. Results from mineralization displayed sample with impregnation retain more nutrients in soil compared to un-impregnated.

Item Type: Conference or Workshop Item (Paper)
Subjects: S Agriculture > S Agriculture (General)
Divisions: Faculty of Manufacturing Engineering > Department of Engineering Materials
Depositing User: Assoc. Prof. Azizah Shaaban
Date Deposited: 01 Apr 2014 01:44
Last Modified: 28 May 2015 04:21
URI: http://eprints.utem.edu.my/id/eprint/11953
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