• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2013, Volume: 6, Issue: 12, Pages: 1-6

Original Article

Urea Intercalated Biochar–a Slow Release Fertilizer Production and Characterisation


A laboratory study was undertaken to determine the N release pattern of Urea Intercalated Biochar derived from Prosopis juliflora. Biochar was produced by pyrolysing the wood cuttings excluding the bark at 350°C. The resultant biochar was characterized using XRD, FT–IR, Raman Spectroscopy and SEM. After characterization, different forms of nitrogen viz., NH4+, NO3−, NH2 , Combined NH4+ and NO3− were loaded at varying concentrations (20–200 mM) and sorption and desorption characteristics were examined. Among the forms tested, urea fortified with biochar showed lower desorption at levels of N loading concentration. A new biochar based formulation was evolved by intercalating biochar with urea at 1:1 ratio through hydrothermal method. The intercalated urea: biochar (1:1 ratio) fertilizer was characterised using the set of equipments and the total nitrogen was quantified as 30% as per the EDAX values which closely coincided with analytical values. The retention and release pattern of urea intercalated biochar depicts that the biochar derived PJ is a potential substrate that can be exploited to develop slow release N fertilizer with higher use efficiency and less environmental harzard.
Keywords: Biochar, Pyrolysis, Slow Release Fertilizer, Sorption, Urea


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