Cesium is a radioactive material which is a big problem when it leaks into seawater. Zeolites are an alternative for removing cesium because they absorb cationic elements and are widely used due to their simplicity, high efficiency and low cost. The objective of this study was to investigate the efficiency of NaCl treated zeolite for removal of cesium ion from synthetic seawater. This study was carried out by performing batch experiments. A synthetic seawater solution of 100 mL containing 80 mg L-1 of non-radioactive cesium was mixed with NaCl treated zeolite of two sizes, 300-424 ¬µm. and 425-850 ¬µm. The sorbent weight per solution volume ratios used in the experiment were 5, 10, 15, and 20 g. per 100 mL of seawater. The contact times were 10, 20, 30, 60 and 120 minutes. The effect of zeolite size was an important factor in cesium removal. Zeolite with a size of 300-424 ¬µm. showed greater efficiency than that with a size of 425-850 ¬µm. The optimum sorbent weight per solution volume ratio was 15 g. per 100 mL of seawater. The best contact time was 60 minutes with more than 80% uptake occurring through rapid adsorption. These results show that NaCl treated zeolite is a promising material for removing cesium from contaminated seawater.
Uracha Termsrirat, Mahidol University, Thailand
Naowarut Charoenca, Mahidol University, Thailand
Nipapun Kungskulniti, Mahidol University, Thailand
Yutthana Tumnoi, Office of Atoms for Peace, Thailand
Stream: Environmental Sustainability & Environmental Management: Freshwater, Oceans and Seas
This paper is part of the ACSEE2016 Conference Proceedings (View)
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