Nursashabila IberahimSumathi SethupathiMohammed J. K. Bashir2024-10-302024-10-302017-05-2610.1007/s11356-017-9180-5https://dspace-cris.utar.edu.my/handle/123456789/5384Optimization of palm oil mill sludge biochar preparation for sulfur dioxide removaljournal-article