Volume 18, Issue 70 (winter 2015)                   jwss 2015, 18(70): 341-350 | Back to browse issues page

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Pooladi F, Hamidrpour M. Sorption Reversibility of Cadmium from Aqueous Solutions on Natural Firoozkoh Zeolite. jwss 2015; 18 (70) :341-350
URL: http://jstnar.iut.ac.ir/article-1-2944-en.html
Dept. of Soil Sci., Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran. , mohsen_hamidpour@yahoo.com
Abstract:   (11177 Views)

Removal of boron from aqueous environments (soil and water) is difficult, because it is present as B(OH)3 and B(OH)4- species. This research was done to study the sorption of boron by HDTMA-modified zeolite. The sorption of B on modified zeolite was studied as a function of pH (B concentration: 1 and 10 mg L-1) in the range of 6-9.5, and as a function of ionic strength (0.03 and 0.06 M Ca(NO3)2 or Mg(NO3)2) at a constant B concentration of 5 mg L-1. Sorption isotherm was performed for the solutions containing initial B concentration in the range of 1-15 mg L-1 using a 24h batch equilibration experiment. The results revealed that surfactant-modified zeolite exhibited the best performance at pH 9.5, and sorption of B increased with the increase of suspension pH. Greater B adsorption in the Ca system over the Mg system was clearly observed for the modified zeolite. Sorption isotherm of B were well described by the Freundlich and Langmuir models but the Freundlich sorption model described the interaction between B and the mineral material better than the Langmuir model. Maximum sorption capacity (qmax) of the sorbent was 120 mmol kg-1. The experimental data showed that HDTMA-modified zeolite used in this study had a reasonable sorption capacity for B.

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Type of Study: Research | Subject: Ggeneral
Received: 2015/03/10 | Accepted: 2015/03/10 | Published: 2015/03/10

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