Kholisa, BuyisileMatsena, Mpumelelo ThomasChirwa, Evans M.N.2024-04-182024-04-182023-06Kholisa, B., Matsena, M.T. & Chirwa, E.M.N. 2023, 'In situ bioreduction of hexavalent chromium-contaminated water using a microbial culture barrier', Chemical Engineering & Technology, vol. 46, no. 6, pp. 1307-1311. DOI: 10.1002/ceat.202200421.0930-7516 (print)1521-4125 (online)10.1002/ceat.202200421http://hdl.handle.net/2263/95649DATA AVAILABILITY STATEMENT : Data are available on request due to privacy or other restrictions.Chromium (Cr) has been extensively used in many industrial applications. Inappropriate disposal of effluent has led to increased Cr concentrations in the environment. As a result, Cr(VI) has been classified under strict control measures by most national and international lists of highly toxic materials. Bioremediation of Cr(VI)-contaminated effluents appears to be a more economical and environment- friendly treatment method. This study investigates Cr(VI) removal in a bench-scale bioreactor using municipal dried sludge as a permeable bioreactive barrier. The 20-cm-thick permeable bioreactive barrier with 30% sludge and 70% sand was able to achieve 95% Cr(VI) removal during 90 operational days, demonstrating the effectiveness of the biological permeable reactive barrier system in treating Cr(VI)-containing process effluent streams.en© 2023 The Authors. This is an open access article under the terms of the Creative Commons Attribution License.BioreductionChromiumMicrobial culturesPermeable bioreactive barriersArticle