Techno Press


Advances in Environmental Research   Volume 6, Number 3, September 2017, pages 173-187
DOI: http://dx.doi.org/10.12989/aer.2017.6.3.173
 
Vanadium(V) removal from aqueous solutions using a new composite adsorbent (BAZLSC): Optimization by response surface methodology
Amin Mojiri, Wang Hui, Ahmad Kamil Arshad, Ahmad Ruslan Mohd Ridzuan, Nor Hayati Abdul Hamid, Hossein Farraji, Ali Gholami and Amir Hossein Vakili

 
Abstract     [Full Text]
    Heavy metals, such as vanadium, are some of the most toxic types of water contaminants. In this study, vanadium was removed using a new composite adsorbent called BAZLSC. The impacts of pH and initial concentration of vanadium(V) on the elimination effectiveness of this metal by using BAZLSC were investigated in the first step of the study. Vanadium removal increased as pH increased to 3-3.5, and initial concentration increased to 60-70 mg/L. The removal efficiency then decreased. Central composite design and response surface methodology were employed to examine experimental data. Initial concentration of V (mg.L-1), pH, and dosage of adsorbent (g/L) were the independent factors. Based on RSM, the removal effectiveness of vanadium was 86.36% at the optimum of initial concentration (52.69 mg/L), pH (3.49), and adsorbent dosage (1.71 g/L). Also adsorption isotherm investigations displayed that the Freundlich isotherm could explain vanadium adsorption by BAZLSC better than the Langmuir isotherm. Beside them, desorption studies showed sorption was slightly diminished after six continuous cycles.
 
Key Words
    adsorption isotherms; composite adsorbent; RSM; vanadium
 
Address
Amin Mojiri, Ahmad Kamil Arshad,Ahmad Ruslan Mohd Ridzuan and Nor Hayati Abdul Hamid: Institute for Infrastructure Engineering and Sustainable Management (IIESM), Universiti Teknologi Mara (UiTM), Shah Alam 40450, Selangor Darul Ehsan, Malaysia

Wang Hui: School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China

Hossein Farraji: School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia (USM), Nibong Tebal 14300, Penang, Malaysia

Ali Gholami: Department of Soil Science, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

Amir Hossein Vakili: 1.) Department of Civil Engineering, Faculty of Engineering, Zand Institute of Higher Education, Shiraz, Iran
2.) Young Researcher and Elite Club, Estahban Branch, Islamic Azad University, Estahban, Iran
 

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