Removal of cationic dyes by poly(acrylamide-co-acrylic acid) hydrogels in aqueous solutions |
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| Affiliation: | 1. Advanced Polymer Laboratory, Department of Polymer Science and Technology, Government College of Engineering and Leather Technology (Post-Graduate), Maulana Abul Kalam Azad University of Technology, Salt Lake, Kolkata 700106, West Bengal, India;2. Department of Leather Technology, Government College of Engineering and Leather Technology (Post-Graduate), Maulana Abul Kalam Azad University of Technology, Salt Lake, Kolkata 700106, West Bengal, India;1. Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, 250100 Jinan, PR China;2. School of Mathematic and Quantitative Economics, Shandong University of Finance and Economics, 250100 Jinan, PR China;1. Civil &Environmental Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia;2. Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia;1. Department of Chemistry, Ambedkar National Institute of Technology, Jalandhar, Punjab, India;2. Department of Chemistry, DAV College, Jalandhar, Punjab, India;1. Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India;2. Department of Chemical Engineering, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India;3. Materials Research Centre, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India;1. Center of Eco-Materials and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Poly(acrylamide-co-acrylic acid (poly(AAm-co-AAc)) hydrogels prepared by irradiating with γ-radiation were used in experiments on swelling, diffusion, and uptake of some cationic dyes such as Safranine-O (SO) and Magenta (M). Poly(AAm-co-AAc) hydrogels irradiated at 8.0 kGy have been used for swelling and diffusion studies in water and cationic dye solutions. The maximum swellings in water, and SO, and M solutions observed are 2700%, 3500%, and 4000%, respectively. Diffusions of water and cationic dyes within hydrogels have been found to be non-Fickian in character. Adsorption of the cationic dyes onto poly(AAm-co-AAc) hydrogels is studied by the batch adsorption technique. The adsorption type was found Langmuir type in the Giles classification system. The moles of adsorbed dye for SO and M per repeating unit in hydrogel (binding ratio, r) have been calculated as 3834×10−6 and 1323×10−6, respectively. These results show that poly(AAm-co-AAc) hydrogels can be used as adsorbent for water pollutants such as cationic dyes. |
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