Известия Томского политехнического университета: Инжиниринг георесурсов (Jun 2018)

Adsorption of petroleum substances and inorganic ions from aqueous solutions using mineral sorbent

  • Tatyana Aleksandrovna Yurmazova,
  • Nina Borisovna Shakhova,
  • Marina Viktorovna Hoang Tran Tuan,
  • Marina Viktorovna Plankina

Journal volume & issue
Vol. 329, no. 5

Abstract

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Relevance. Nowadays among different water purification techniques, sorption method is generally preferred. Intension to improve the efficiency of sorption in water purification makes the problem of developing and investigating the sorption mechanism and practical application of low-cost and effective adsorbents the focus of attention for many studies. The main aim is to study adsorption of water soluble petroleum substances and H2AsO4 -, CrO4 2-, Ni2+, Fe3+ ions from their aqueous solutions by mineral sorbent tripoli, and investigate the effect of various parameters affecting sorption behaviour for better understanding adsorption process and ways of possible usage of the mineral sorbent (tripoli) for wastewater purification. Object. Low-cost locally available tripoli (Zikeevsk deposit, Russia) was selected as a natural mineral sorbent.Methods: X-ray phase analysis, inductively coupled plasma atomic emission spectrometry, method of thermal desorption of nitrogen, Indicator method Results. Tripoli was characterized by different physico-chemical methods such as X-ray phase analysis, atomic emission spectrometry with inductively coupled plasma, method of thermal desorption of nitrogen. The authors have determined contact time, specific surface area, specific pore volume of tripoli and adsorption kinetic data. The adsorption isotherms of petroleum substances and H2AsO4 -, CrO4 2-, Ni2+,Fe3+ ions from their aqueous solutions using tripoli were studied. The adsorption was explained in terms of Langmuir and Freundlich isotherms. Indicator method was applied to detect the fact that the tripoli active sites are negatively charged. It was determined that modification of mineral sorbent (tripoli) leads to increase in H2AsO4 - adsorbing capacity of tripoli. This work suggests that the mineral sorbent tripoli can be effectively used in water purification from petroleum substances and Ni2+, Fe3+ ions as low-cost, effective, environmentally friendly adsorbent.

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