EVALUATING THE PERFORMANCE OF MODIFIED ADSORBENT OF ZERO VALENT IRON NANOPARTICLES- CHITOSAN COMPOSITE FOR ARSENATE REMOVAL FROM AQUEOUS SOLUTIONS

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YAGHMAEIAN K.; JAAFARZADEH N.; NABIZADEH R.; RASOULZADEH H.; AKBARPOUR B.

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Journal: Iranian Journal of Health and Environment Year:2016 | Volume:8 | Issue:4 Page(s): 535-548

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Title

EVALUATING THE PERFORMANCE OF MODIFIED ADSORBENT OF ZERO VALENT IRON NANOPARTICLES- CHITOSAN COMPOSITE FOR ARSENATE REMOVAL FROM AQUEOUS SOLUTIONS

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Keywords

ADSORPTIONQ2

ARSENATEQ2

CHITOSANQ2

MODIFIED ZERO VALENT IRON NANOPARTICLESQ2

Abstract

Background and Objective: Arsenic is one of the most toxic pollutants in groundwater and surface water. Arsenic could have lots of adverse impacts on human health. Therefore, access to new technologies is required to achieve the arsenic standard.Materials and Methods: The present study was conducted at laboratory scale in non-continuous batches. The adsorbent of zero-valent iron nanoparticles -Chitosan was produced through reducing ferric iron by sodium borohydride (NaBH4) in the presence of CHITOSAN as a stabilizer.At first, the effect of various parameters such as contact time (5-120 min), pH (3-10), adsorbent dose (0.3-3.5 g/L) and initial concentration of ARSENATE (2-10 mg/L) were investigated on process efficiency. Then optimum conditions in terms of contact time, pH, adsorbent dose and initial concentration of ARSENATE were determined by RSM method. Freundlich and Langmuir isotherm model equilibrium constant, pseudo-The residual. first and second order kinetic constants were calculated ARSENATE was measured y using ICP-AES.Results: The optimum values based on RSM for pH, absorbent dose, contact time, and initial concentration of ARSENATE were 7.16, 3.04 g/L, 91.48 min, and 9.71 mg/L respectively. Langmuir isotherm with R2=0.9904 for ARSENATE was the best graph for the experimental data. According to Langmuir isotherm model, the maximum amount of ARSENATE ADSORPTION was 135.14 mg/g.. The investigation of ARSENATE ADSORPTION kinetics showed that ARSENATE ADSORPTION follows the pseudo-second kinetics model.Conclusion: This research showed that the ADSORPTION process is depended on pH. With increasing pH, the ability of amine groups in CHITOSAN are decreased to protonation, caused to decrease the efficiency of ARSENATE removal at high pH.

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APA: Copy

YAGHMAEIAN, K., JAAFARZADEH, N., NABIZADEH, R., RASOULZADEH, H., & AKBARPOUR, B.. (2016). EVALUATING THE PERFORMANCE OF MODIFIED ADSORBENT OF ZERO VALENT IRON NANOPARTICLES- CHITOSAN COMPOSITE FOR ARSENATE REMOVAL FROM AQUEOUS SOLUTIONS. IRANIAN JOURNAL OF HEALTH AND ENVIRONMENT, 8(4), 535-548. SID. https://sid.ir/paper/146118/en

Vancouver: Copy

YAGHMAEIAN K., JAAFARZADEH N., NABIZADEH R., RASOULZADEH H., AKBARPOUR B.. EVALUATING THE PERFORMANCE OF MODIFIED ADSORBENT OF ZERO VALENT IRON NANOPARTICLES- CHITOSAN COMPOSITE FOR ARSENATE REMOVAL FROM AQUEOUS SOLUTIONS. IRANIAN JOURNAL OF HEALTH AND ENVIRONMENT[Internet]. 2016;8(4):535-548. Available from: https://sid.ir/paper/146118/en

IEEE: Copy

K. YAGHMAEIAN, N. JAAFARZADEH, R. NABIZADEH, H. RASOULZADEH, and B. AKBARPOUR, “EVALUATING THE PERFORMANCE OF MODIFIED ADSORBENT OF ZERO VALENT IRON NANOPARTICLES- CHITOSAN COMPOSITE FOR ARSENATE REMOVAL FROM AQUEOUS SOLUTIONS,” IRANIAN JOURNAL OF HEALTH AND ENVIRONMENT, vol. 8, no. 4, pp. 535–548, 2016, [Online]. Available: https://sid.ir/paper/146118/en

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