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REGENERATION AND REUSE OF NATURAL ZEOLITE FOR AMMONIUM REMOVAL
Abstract
Natural zeolites are able to remove lower concentrations of contaminants present in groundwater and drinking water through ion-exchange process. The main objectives of this work were: (1) to determine the efficiency of different types of regenerants: NaOH 0.5 M, NaCl 0.5 M, NaClO 0.5 M and NaClO:NaCl (1:1) 0.5 M; (2) to investigate the effect of initial pH (5.7 - 11.7) and molarity (0.5 - 1 M) of the regenerants; and (3) to determine the removal capacity of natural zeolite for ammonium removal after ten (10) sorption-desorption cycles. The batch sorption experiments were conducted at room temperature using 3 g of natural zeolite (from Chilioara, Romania) of 0.5 - 1.25 mm particle size for ammonium removal (30 mg/L initial concentration). The obtained results showed a rapid desorption of ammonium ions using NaOH and NaCl, and a slower desorption using NaClO and NaClO:NaCl (1:1) as regenerants. High desorption efficiencies for ammonium removal were obtained using NaCl 1 M (87.5 %) and NaOH 0.75 M (80.4 %), respectively. A maximum efficiency of 92.3% was obtained after the first sorption cycle, then the efficiency decreased in the following three cycles. During the last four cycles of sorption an efficiency of 88 - 89 % was obtained. Based on the obtained results it has been concluded that the natural zeolite presents good performance for ammonium removal after several sorption-desorption cycles suggesting the durability of the natural zeolites from Chilioara, Romania. The present work offers a useful approach for improving wastewater treatment processes, technology and infrastructure.
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References6
Ham K., Kim B.S., Choi K.-Y., Enhanced ammonium removal efficiency by ion exchange process of synthetic zeolite after Na and heat pretreatment, Water Science & Technology, vol. 78/issue 6, pp. 1417-1425, 2018.
Huang Y., Song C., LI L., Zhou Y., The mechanism and performance of zeolites for ammonia removal in the zeolite packed electrolysis reactor, Electrochemistry, vol. 82/issue 7, pp. 557-560, 2014.
Kotoulas A., Agathou D., Triantaphyllidou I.E., Tatoulis T.I., Akratos C.S., Tekerlekopoulou A.G., Vayenas D.V., Zeolite as a potential medium for ammonium recovery and second cheese whey treatment, Water, vol. 11/issue 1, 136, 2019.
Huang H., Yang L., Xue Q., Liu J., Hou L., Ding L., Removal of ammonium from swine wastewater by zeolite combined with chlorination for regeneration, Journal of Environmental Management vol. 160/issue 1, pp. 333-341, 2015.
Zhang W., Zhou Z., An Y., Du S., Ruan D., Zhao C., Ren N., Tian X., Optimization for zeolite regeneration and nitrogen removal performance of a hypochlorite-chloride regenerant, Chemosphere, vol. 178, pp. 565-572, 2017.
Dada A. O., Olalekan A. P., Olatunya A. M., Dada O., Langmuir, Freundlich, Temkin and Dubinin Radushkevich Isotherms Studies of Equilibrium Sorption of Zn2+ Unto Phosphoric Acid Modified Rice Husk, IOSR Journal of Applied Chemistry (IOSR-JAC), vol. 3, pp. 38-45, 2012.
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