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This paper reviews the utilization of acid tars with the overall aim of reducing or eradicating the environmental problems associated with acid tar landfill disposal at a local crude benzol refinery in Zimbabwe .The review focused on disposal, characterization, composition and utilization of acid tars. Peer reviewed journal and conference papers from 1980 to the current year were considered. The papers reviewed were mainly from petroleum processing since the acidic nature of the tar can be assumed to be similar to that of crude benzol processing and the databases used were Science direct, Hinari and Agora .The effects of the disposal of acid tar in lagoon were reviewed. The utilisation of acid tar waste is dependent on the chemical composition hence work on the characterization of acid tars was reviewed. The use G.C-MS was common in the characterization of acid tars as compared to other analytical techniques. Some of the utilization processes which were reviewed included among others the conversion of acid tar to asphaltenes, production of pavement binders, energy utilisation, acid tar co-processing, membrane technology, ion exchangers and carbon adsorbents technique. The utilization of acid tar waste hinges on effective treatment methods owing to its complex chemical composition.

Characterization and utilization of acid tar waste from crude benzol processing for environmental sustainability