Nanoscale zero-valent iron-impregnated agricultural waste as an effective biosorbent for the removal of heavy metal ions from wastewater
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- 作者：P. Senthil Kumar ; A. Saravanan ; P. Sundar rajan…
- 关键词：Adsorption ; NZVI ; CNS ; Freundlich model ; Pseudo first ; order kinetics ; Exothermic ; Batch adsorber design
- 刊名：Textiles and Clothing Sustainability
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：2
- 期：1
- 全文大小：1,166 KB
- 刊物类别：Textile Engineering; Environmental Management; Sustainable Development; Industrial Chemistry/Chemica
- 刊物主题：Textile Engineering; Environmental Management; Sustainable Development; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials; Engineering Economics, Organization, Lo
- 出版者：Springer Singapore
- ISSN：2197-9936
文摘
A novel, nanoscale zero-valent iron-impregnated cashew nut shell (NZVI-CNS) was synthesized towards the removal of Ni(II) ions from aqueous solution using impregnation procedure. The factors affecting Ni(II) ion adsorption in a batch mode were studied including the initial metal ion concentration, solution pH, temperature, adsorbent dosage, and contact time. The adsorption isotherm and kinetics could be described well with Freundlich and pseudo first-order, respectively. The maximum monolayer adsorption capacity for the removal of Ni(II) ions was found to be 70.05 mg/g. The calculated thermodynamic parameters showed that the removal of Ni(II) ions by the NZVI-CNS was spontaneous, feasible, and exothermic in nature. The amount of adsorbent needed to treat the known volume of the effluent was calculated by using single-stage batch adsorber design. The experimental results specifies that the NZVI-CNS have a high adsorption capacity for the removal of Ni(II) ions from aqueous solution.