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Esterification of oil adsorbed on palm decanter cake into methyl ester using sulfonated rice husk ash as heterogeneous acid catalyst.
(American Institute of Physich, 2017)
Review Result “Modification of Spent Bleaching Earth with WO3 and the Application for Photocatalytic Degradation of Waste Dyestuff under Solar Light”
(Jurnal Bahan Alam Terbarukan, 2019-11)