Synthesis of Nano and Micro-Organobentonite Using Hexadecyltrimethylammonium Bromide; Evaluation of Their Absorption Efficiency and Release of Nitrate in Aqueous Solutions

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NEMATI FARIBA; TORABI HOSSEIN; NAJI AMIR MOHAMMAD

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Journal: Iranian Journal of Soil and Water Research Year:2017 | Volume:48 | Issue:2 Page(s): 405-415

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Title

Synthesis of Nano and Micro-Organobentonite Using Hexadecyltrimethylammonium Bromide; Evaluation of Their Absorption Efficiency and Release of Nitrate in Aqueous Solutions

Author(s)

NEMATI FARIBA | TORABI HOSSEIN | NAJI AMIR MOHAMMAD | Issue Writer Certificate

Keywords

Modified bentoniteQ1

Cationic surfactantQ1

OrganoclayQ1

CECQ2

Abstract

Organoclays are natural clay minerals modified through polymer compounds and applied for especial purposes. By being done so, the clay layers are permanently propped with high surface areas in the interlayers. The objective followed in this study was to find out the absorption efficiency and release of nitrate in aqueous solutions through modified Iranian bentonite (Arak). Micro and nano-bentonites were first modified by hexadecyltrimethylammonium bromide, a Cationic surfactant. The adsorption efficiencies within 0, 3, 6, 9, 14, 20, 30 and 40 mM nitrate (by modified micro and nano-organobentonite particles) in surfactant loadings of 100 and 200% CEC were investigated in a completely randomized factorial design. Furthermore, to identity the stability of adsorbed nitrate by Modified bentonite, the nitrate desorption process was performed at nitrate concentrations of 6 and 20 mM within 15, 30, 45 minutes and in 1, 2, 8 and 16 hours in a completely randomized factorial design. The results indicated that absorption efficiency of nitrate by nanoorganobentonite with surfactant loading of 200% CEC in 3, 6, 9, 14, 20, 30 and 40 mM nitrate were 96, 94, 91, 90, 84, 76 and 68%, whereas in micro-organobentonite were 87, 92, 89, 86, 74, 80 and 68% respectively. The results finally revealed that concentration of surfactant was significant on adsorption and release of nitrate (p≤ 0. 01), but the size particles was not significant (p≤ 0. 01). Nano-bentonite in 200% CEC of HDTMA and low concentration of nitrate benefits from a highest adsorption efficiency (96%) with minimum release of 3. 7%.

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APA: Copy

NEMATI, FARIBA, TORABI, HOSSEIN, & NAJI, AMIR MOHAMMAD. (2017). Synthesis of Nano and Micro-Organobentonite Using Hexadecyltrimethylammonium Bromide; Evaluation of Their Absorption Efficiency and Release of Nitrate in Aqueous Solutions. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 48(2 ), 405-415. SID. https://sid.ir/paper/225912/en

Vancouver: Copy

NEMATI FARIBA, TORABI HOSSEIN, NAJI AMIR MOHAMMAD. Synthesis of Nano and Micro-Organobentonite Using Hexadecyltrimethylammonium Bromide; Evaluation of Their Absorption Efficiency and Release of Nitrate in Aqueous Solutions. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2017;48(2 ):405-415. Available from: https://sid.ir/paper/225912/en

IEEE: Copy

FARIBA NEMATI, HOSSEIN TORABI, and AMIR MOHAMMAD NAJI, “Synthesis of Nano and Micro-Organobentonite Using Hexadecyltrimethylammonium Bromide; Evaluation of Their Absorption Efficiency and Release of Nitrate in Aqueous Solutions,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 48, no. 2 , pp. 405–415, 2017, [Online]. Available: https://sid.ir/paper/225912/en

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