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المؤلفAlbadarin, A.B.
المؤلفMangwandi, C.
المؤلفWalker, G.M.
المؤلفAllen, S.J.
المؤلفAhmad, M.N.M.
المؤلفKhraisheh, Majeda
تاريخ الإتاحة2022-05-21T08:36:55Z
تاريخ النشر2013
اسم المنشورJournal of Environmental Management
المصدرScopus
المعرّفhttp://dx.doi.org/10.1016/j.jenvman.2012.09.017
معرّف المصادر الموحدhttp://hdl.handle.net/10576/31232
الملخصTea waste (TW) and Date pits (DP) were investigated for their potential to remove toxic Cr(VI) ions from aqueous solution. Investigations showed that the majority of the bound Cr(VI) ions were reduced to Cr(III) after biosorption at acidic conditions. The electrons for the reduction of Cr(VI) may have been donated from the TW and DP biomasses. The experimental data obtained for Cr(VI)-TW and Cr(VI)-DP at different solution temperatures indicate a multilayer type biosorption, which explains why the Sips isotherm accurately represents the experimental data obtained in this study. The Sips maximum biosorption capacities of Cr(VI) onto TW and DP were 5.768 and 3.199 mmol/g at 333 K, respectively, which is comparatively superior to most other low-cost biomaterials. Fourier transform infrared spectroscopic analysis of the metal loaded biosorbents confirmed the participation of -COOH, -NH2 and O-CH3 groups in the reduction and complexation of chromium. Thermodynamic parameters demonstrated that the biosorption of Cr(VI) onto TW and DP biomass was endothermic, spontaneous and feasible at 303-333 K. The results evidently indicated that tea waste and date pits would be suitable biosorbents for Cr(VI) in wastewater under specific conditions.
اللغةen
الموضوعBiomaterials
Biosorption
Complexation
Hexavalent chromium
Reduction
العنوانInfluence of solution chemistry on Cr(VI) reduction and complexation onto date-pits/tea-waste biomaterials
النوعArticle
الصفحات190-201
رقم المجلد114
dc.accessType Abstract Only


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