Study of Microstructure and Chemical Composition of Biochar from Agricultural Waste for Soil Improving Materials
Keywords:
Biochar, Agricultural waste, Microstructure, Soil improving materialsAbstract
Study Microstructure and Chemical of biochar from agricultural waste such as giant mimosa, pride of barbados and corn cobs to be used as a soil improving materials. The biochars prepared from pyrolysis process at temperature 400-600oC. The biochars were studied morphology by scanning electron microscopy (SEM) and chemical composition by energy dispersive x-ray spectrometer (EDX). It was found that microstructure of biochar from giant mimosa, there are homogeneous pores on the surfaces its diameter about 10-15 micrometers. The pride of barbados biochars have homogeneous pores on the surfaces its diameter about 40-50 micrometers and inside the large pores have small pores about 2-10 micrometers and the corn cobs biochars have homogeneous pores about 10-15 micrometers. The chemical compositions all of biochar are analogous which consist of carbon as a main element and silicon, calcium and potassium as a second element. Potassium in corn cobs and pride of barbados biochars were significant higher than giant mimosa biochars. From these results, it can be predicted that the biochar of the three types of agricultural waste materials has suitable properties for use as soil improving materials. It is because high porosity which may good absorbed water and nutrient.
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