Adsorption of inorganic ions from aqueous solutions using mineral sorbent-Tripoli

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Abstract

The present research considers the adsorption of H2AsO4 -, CrO4 2-, Ni2+, Fe3+ ions from their aqueous solutions by mineral sorbent-Tripoli. Tripoli was characterized by different physico-chemical methods such as X-ray phase analysis, inductively coupled plasma atomic emission spectrometry, method of thermal desorption of nitrogen. Contact time, specific surface area, specific pore volume and surface charge of Tripoli have been determined. The effect of Tripoli surface area modification by iron (III) oxide-hydroxide on Tripoli sorption capacity for the arsenic anions has been investigated. The maximum adsorption was found to occur within 30 minutes of contact time. Different models including the pseudo-first-order kinetic and the pseudo-second-order kinetic equations were used to analyse kinetic data. All the models being considered, it has been stated that the pseudo-second-order kinetic model is the most appropriate to describe the adsorption behaviour of Fe3+ ions on Tripoli. The adsorption has been explained in terms of Langmuir and Freundlich isotherms. Based on values of correlation coefficients, H2AsO4 -, CrO4 2-, Ni2+, Fe3+ sorption isotherm data were better fitted by Langmuir model. It has been detected that the modification of mineral sorbent (Tripoli) leads to the increase in H2AsO4 - adsorbing capacity of Tripoli. In general, the results indicated that Tripoli can be an efficient low-cost sorbent for removing H2AsO4 -, Ni2+, Fe3+ ions from aqueous solutions.

Original languageEnglish
Article number01017
JournalMATEC Web of Conferences
Volume85
DOIs
Publication statusPublished - 17 Nov 2016

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Sorbents
Minerals
Ions
Adsorption
Kinetics
Isotherms
Sorption
Thermal desorption
Arsenic
Inductively coupled plasma
Surface charge
Iron oxides
Specific surface area
Spectrometry
Anions
Nitrogen
Negative ions
X rays
Costs

ASJC Scopus subject areas

  • Chemistry(all)
  • Engineering(all)
  • Materials Science(all)

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Adsorption of inorganic ions from aqueous solutions using mineral sorbent-Tripoli. / Yurmazova, Tatyana; Shakhova, Nina; Tuan, Hoang Tran.

In: MATEC Web of Conferences, Vol. 85, 01017, 17.11.2016.

Research output: Contribution to journalArticle

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