Author:
Pathirannehe P.N.S., ,Fernando T.D.,Rajapakse C.S.K., ,
Abstract
In this study, physically and chemically modified chitosan; protonated glycerol diglycidyl ether cross-linked chitosan beads (GDCLCB/H+) were prepared and characterized using FTIR and SEM. The optimum defluoridation capacity (DC) of GDCLCB/H+ was observed at the initial F- ion concentration of 15 mg/l, adsorbent dosage of 0.6 g, contact time of 30 min and pH of the solution was in the range of 5–7 at 303 ± 2 K. The equilibrium adsorption data fitted well with Langmuir and Freundlich isotherm models. The maximum adsorption capacity (q0), obtained from Langmuir isotherm for F-adsorption was found to be 2000 mg/kg, which was significantly higher than that of unmodified chitosan (192.3 mg/kg) and most of the chitosan-based sorbents reported in the literature. Water samples collected from Medawachchiya, Sri Lanka, were treated with the adsorbents and the results suggested that GDCLCB/H+ could be used as an effective defluoridation agent.
Publisher
Lviv Polytechnic National University
Subject
General Chemical Engineering,General Chemistry
Reference48 articles.
1. [1] Dissanayake C.: J. Nat. Sci. Found. Sri Lanka, 2005, 33, 161. https://doi.org/10.4038/jnsfsr.v33i3.2322
2. [2] Firempong C., Nsiah K., Awunyo-Vitor D., Dongsogo J.: Ghana Med. J., 2013, 47, 16. http://www.ncbi.nlm.nih.gov/pubmed/23661851%0Ahttp://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=PMC3645181
3. [3] Habuda-Stanić M., Ravančić M., Flanagan A.: Materials, 2014, 7, 6317. https://doi.org/10.3390/ma7096317
4. [4] Gorchev H., Ozolins G.: WHO Chron., 1984, 38, 104.
5. [5] Kodama H., Kabay N.: Solid State Ionics, 2001, 141-142, 603. https://doi.org/10.1016/S0167-2738(01)00775-5
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献