Sorption of ofloxacin and chrysoidine by grape stalk. A representative case of biomass removal of emerging pollutants from wastewater
Emerging pollutants, as antibiotics or dyes, inaquatic ecosystemsare a crucial concern and numerous techniques have been developed for their removal. Efficiency, cost effectiveness, andbiodegradabilityreveal biomasssorptionas one of the most appealing methods. This study aims to evaluate the effectiveness of grape stalk as asorbentforofloxacin(a fluoroquinolone antibiotic) andchrysoidine(an azo-dye). The kinetic and the thermodynamic aspects of thesorptionwere studied. A pseudo first-order kinetic behavior is shown by both substances, though the kinetic constants ofofloxacinare almost double than those of chrysoidine. The sorption isotherms, which strictly follow the Langmuir model, show remarkable differences as a function of pH and of biomass size. The trend of Langmuir parameters,QmaxandK, as a function of pH and size, is discussed, and different binding mechanisms are proposed. Kinetic and thermodynamic parameters prefigure grape stalk as a potential biomass for scavengingtoxic substancesfrom wastewater.
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Loại tài liệu:
Article
Tác giả:
Nurchi, V.M.
Đề mục:
Arabian Journal of Chemistry
Nhà xuất bản:
Elsevier Ltd.
Ngày xuất bản:
November 2019
Số trang/ tờ:
pdf
Nguồn gốc:
Arabian Journal of Chemistry, Volume 12, Issue 7 , November 2019, Pages 1141-1147