@article{ahmad_bhatia_ibrahim_sumathi_2005,  title={Adsorption of residual oil from palm oil mill effluent using rubber powder},  volume={22},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322005000300006},  DOI={10.1590/S0104-66322005000300006},  number={3},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Ahmad, A.L. and Bhatia, S. and Ibrahim, N. and Sumathi, S.},  year={2005},  month={Jul},  pages={371–379} }