Trung, D. 2020. Research application coal material is prepared from maccadamia peel and denatured by H2O2 to treat methylene blue. Science & Technology Development Journal: Science of the Earth & Environment. 3, 2 (Jan. 2020), 96- 104. DOI:https://doi.org/https://doi.org/10.32508/stdjsee.v3i2.476.