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Removal of Pb 2+ and Cd 2+ ions from aqueous solutions using Fe 3 O 4 /Bentonite nanocomposite
Author(s) -
Van Lam Pham,
Duong Nguyen Binh,
Trang Quan Thi Thu,
Tuan Vu Anh
Publication year - 2018
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201800058
Subject(s) - adsorption , bentonite , freundlich equation , aqueous solution , nanocomposite , metal ions in aqueous solution , ion , nuclear chemistry , chemistry , environmental remediation , metal , water treatment , materials science , chemical engineering , contamination , waste management , nanotechnology , organic chemistry , engineering , ecology , biology
The paper presents results of studies on using Fe 3 O 4 /bentonite nanocomposite (FB) to clean water contaminated by Pb 2+ and Cd 2+ ions. With the advantages of cheap and abundant bentonite as well as convenient magnetic separation, the using of FB is expected to reduce water treatment expenses. The batch experimental results indicated that the pH of the solution, the initial metal ion concentration and the contact time play important roles in the adsorption process of Pb 2+ and Cd 2+ ions onto the FB. The results from adsorption isotherm study are found to fit well with Freundlich adsorption isotherm model. In the adsorption condition: adsorbent dose of 1 mg.L ‐1 , initial concentration of 100 mg.L ‐1 , contact time of 60 min at 120 rpm and at 25°C, the adsorption capacity for Pb 2+ and Cd 2+ ions is 84.9 mg.g −1 and 58.6 mg.g −1 , respectively. These values of FB material are higher than one of most of the other materials. It is promising that this FB nanocomposite would become an efficient and economic material for Pb 2+ and Cd 2+ ions removal in the practical environmental remediation.