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http://dx.doi.org/10.17137/korrae.2021.29.4.25

Enhanced Removal Efficiency of Low-Concentration Cesium Ion in Water Phase by Using Petroleum Residue Pitch  

Choi, Tae Ryeong (Department of Environmental Safety System Engineering, Semyung University)
Ha, Jeong Hyub (Department of Integrated Environmental Systems, Pyeongtaek University)
Choi, Suk Soon (Department of Biological and Environmental Engineering, Semyung University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.29, no.4, 2021 , pp. 25-31 More about this Journal
Abstract
In this research, in order to effectively utilize the petroleum residue pitch, it was used as an adsorbent for removal of cesium ion. In this experiment, acid modification (hydrochloric acid, sulfuric acid) treatment was performed on the adsorbent to improve the ability to remove low-concentration cesium ions dissolved in water. As a result, when the reaction was performed with 9 M sulfuric acid at 25 ℃ and for 240 min, the removal efficiencies of 1.0 and 2.5 mg/L cesium ions were 66 and 51%, respectively. In addition, as the adsorption time increased in the batch experiment, the removal capacity of 1.0 and 2.5 mg/L cesium ions was improved, and when the adsorption reached for 32 hr, the removal efficiencies were 72 and 68%, respectively. Also, in order to increase the ability to remove the remaining cesium ions, an experiment was performed by temperature change (25, 37, 49 ℃), and 1.0 and 2.5 mg/L cesium ions contained in water under the operating conditions of 49 ℃ and 32 hr showed removal efficiencies of 90 and 81%, respectively. Consequently, these experimental results were intended to be used as an adsorption technology that can economically treat low-concentration cesium ions contained in water.
Keywords
Petroleum residue pitch; Removal of low-concentration cesium ion; Sulfuric acid treatment;
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