Enhanced Arsenate Removal Performance in Aqueous Solution by Yttrium-Based Adsorbents
AbstractArsenic contamination in drinking water has become an increasingly important issue due to its high toxicity to humans. The present study focuses on the development of the yttrium-based adsorbents, with basic yttrium carbonate (BYC), Ti-loaded basic yttrium carbonate (Ti-loaded BYC) and yttrium hydroxide prepared using a co-precipitation method. The Langmuir isotherm results confirmed the maximum adsorption capacity of Ti-loaded BYC (348.5 mg/g) was 25% higher than either BYC (289.6 mg/g) or yttrium hydroxide (206.5 mg/g) due to its increased specific surface area (82 m2/g) and surface charge (PZC: 8.4). Pseudo first- and second-order kinetic models further confirmed that the arsenate removal rate of Ti-loaded BYC was faster than for BYC and yttrium hydroxide. It was subsequently posited that the dominant removal mechanism of BYC and Ti-loaded BYC was the carbonate-arsenate ion exchange process, whereas yttrium hydroxide was regarded to be a co-precipitation process. The Ti-loaded BYC also displayed the highest adsorption affinity for a wide pH range (3–11) and in the presence of coexisting anionic species such as phosphate, silicate, and bicarbonate. Therefore, it is expected that Ti-loaded BYC can be used as an effective and practical adsorbent for arsenate remediation in drinking water. View Full-Text
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Lee, S.-H.; Kim, K.-W.; Lee, B.-T.; Bang, S.; Kim, H.; Kang, H.; Jang, A. Enhanced Arsenate Removal Performance in Aqueous Solution by Yttrium-Based Adsorbents. Int. J. Environ. Res. Public Health 2015, 12, 13523-13541.
Lee S-H, Kim K-W, Lee B-T, Bang S, Kim H, Kang H, Jang A. Enhanced Arsenate Removal Performance in Aqueous Solution by Yttrium-Based Adsorbents. International Journal of Environmental Research and Public Health. 2015; 12(10):13523-13541.Chicago/Turabian Style
Lee, Sang-Ho; Kim, Kyoung-Woong; Lee, Byung-Tae; Bang, Sunbaek; Kim, Hyunseok; Kang, Hyorang; Jang, Am. 2015. "Enhanced Arsenate Removal Performance in Aqueous Solution by Yttrium-Based Adsorbents." Int. J. Environ. Res. Public Health 12, no. 10: 13523-13541.