Y.M. Al-Awadhi, S. Pradhan, G. Mckay, T. Al-Ansari, H.R. Mackey, Coffee Waste Biochar: a Widely Available and Low-cost Biomass for Producing Carbonaceous Water Treatment Adsorbents, Chemical Engineering Transactions. 92 (2022) 319-324. doi:10.3303/CET2292054.