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This study evaluated the potential of a chemically and thermally modified coconut husk as oil-spill sorbents in the remediation of crude oil contaminated marine water under varying physical factors of sorption time, initial oil concentration, temperature, sorbent dosage and oil weathering number of days. Coconut husk (CH) was chemically activated with zinc chloride and then pyrolyzed at a different combination of temperatures-retention times of 400 -800°C and 30 - 60 minutes to produce un-activated and activated coconut husk-derived biochar (CHB and ACHB), while acetylated-coconut husk (ACCH) was produced using acetic anhydride. The results revealed that the sorption potential of coconut husk can be enhanced by chemical, thermal (pyrolysis) and chemo-thermal treatments (chemical/pyrolysis). The oil sorption capacities and oil removal efficiencies of raw CH, ACCH, CHB_800-60, and ACHB_800-60 …