Arsenic(V) biosorption by charred orange peel in aqueous environments

Muhammad Abid, Nabeel Khan Niazi, Irshad Bibi, Abida Farooqi, Yong Sik Ok, Anitha Kunhikrishnan, Fawad Ali, Shafaqat Ali, Avanthi Deshani Igalavithana, Muhammad Arshad

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Abstract

Biosorption efficiency of natural orange peel (NOP) and charred orange peel (COP) was examined for the immobilization of arsenate (As(V)) in aqueous environments using batch sorption experiments. Sorption experiments were carried out as a function of pH, time, initial As(V) concentration and biosorbent dose, using NOP and COP (pretreated with sulfuric acid). Arsenate sorption was found to be maximum at pH 6.5, with higher As(V) removal percentage (98%) by COP than NOP (68%) at 4 g L−1 optimum biosorbent dose. Sorption isotherm data exhibited a higher As(V) sorption (60.9 mg g−1) for COP than NOP (32.7 mg g−1). Langmuir model provided the best fit to describe As(V) sorption. Fourier transform infrared spectroscopy and scanning electron microscopy combined with energy dispersive X-ray spectroscopy analyses revealed that the –OH, –COOH, and –N-H surface functional groups were involved in As(V) biosorption and the meso- to micro-porous structure of COP sequestered significantly (2-times) higher As(V) than NOP, respectively. Arsenate desorption from COP was found to be lower (10%) than NOP (26%) up to the third regeneration cycle. The results highlight that this method has a great potential to produce unique ‘charred’ materials from the widely available biowastes, with enhanced As(V) sorption properties.

Original languageEnglish
Pages (from-to)442-449
Number of pages8
JournalInternational Journal of Phytoremediation
Volume18
Issue number5
DOIs
Publication statusPublished - 2016 May 3
Externally publishedYes

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Keywords

  • arsenic remediation
  • bioremoval
  • biosorbents
  • contamination
  • drinking water
  • wastewater

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Plant Science

Cite this

Abid, M., Niazi, N. K., Bibi, I., Farooqi, A., Ok, Y. S., Kunhikrishnan, A., Ali, F., Ali, S., Igalavithana, A. D., & Arshad, M. (2016). Arsenic(V) biosorption by charred orange peel in aqueous environments. International Journal of Phytoremediation, 18(5), 442-449. https://doi.org/10.1080/15226514.2015.1109604