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Synthesis of Fe 3 O 4 /Alginate composite for dye removal from aqueous solution
Author(s) -
Minh Vu Xuan,
Hanh Le Thi My,
Lan Pham Thi,
Van Bien Tran,
Dung Nguyen Tuan
Publication year - 2020
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201900151
Subject(s) - adsorption , freundlich equation , aqueous solution , methyl orange , langmuir , desorption , composite number , cationic polymerization , methylene blue , chemistry , langmuir adsorption model , chemical engineering , nuclear chemistry , wastewater , materials science , waste management , organic chemistry , composite material , catalysis , photocatalysis , engineering
Currently, in Vietnam, the textile industry is developing strongly, accompanied by the problem of wastewater pollution is becoming more serious. The most difficult to treat in textile waste water is residue dye. Research on the production of adsorbents of natural origin, environmentally friendly and recyclable is one of the high potential socio‐economic solutions. In this study, water treatment composite beads were synthesized from the natural alginate product of Nha Trang Institute of Technology Research and Application and nano magnetite particles. Batch adsorption experiments of anionic dye (methyl orange) and cationic dye (methylene blue) showed that the composite beads adsorbed very well MB at high pH (pH > 2.5), and almost without MO adsorption. The equilibrium adsorption time is found to be 240 minutes. The experimental adsorption data were analyzed using Langmuir and Freundlich isotherms, and the results showed that Langmuir isotherm fits well the MB adsorption on Fe 3 O 4 /Alg composite bead, with the adsorption capacity, q max , of 555 mg/g. The desorption with various solutions showed that 0.1 M HCl and 0.1 M CaCl 2 solutions were used for the desorption with an efficiency of 90 %.