Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 192, Issue -, Pages 31-38Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2017.01.038
Keywords
Thallium(1); FeOOH-loaded MnO2; Emergency material; Thallium pollution incident
Categories
Funding
- National Natural Science Foundation of China [41673092, 41472038, 41273122]
- Science and Technology Plan of Guangdong Province, China [2014A020216002, 20168020242004]
- Science and Technology Program of Guangzhou, China [201604020064]
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A FeOOH-loaded MnO2 nano-composite was developed as an emergency material for Tl(I) pollution incident. Structural characterizations showed that FeOOH successfully-loaded onto MnO2, the nanosheetflower structure and high surface area (191 m(2) g(-1)) of material contributed to the excellent performance for Tl(I) removal. FeOOH-loaded MnO2 with a Fe/Mn molar ratio of 1:2 exhibited a noticeable enhanced capacity for Tl(I) removal compared to that of pure MnO2. The outstanding performance for Tl(I) removal involves in extremely high efficiency (achieved equilibrium and drinking water standard within 4 min) and the large maximum adsorption capacity (450 mg g(-1)). Both the control-experiment and XPS characterization proved that the removal mechanism of 11(I) on FeOOH-loaded MnO2 included adsorption and oxidation: the oxidation of MnO2 played an important role for 11(I) removal, and the adsorption of FeOOH loaded on MnO2 enhanced Tl(I) purification at the same time. In-depth purification of Tl(I) had reach drinking water standards (0.1 mu g L-1) at pH above 7, and there wasn't security risk produced from the dissolution of Mn2+ and Fe2+. Moreover, the as-prepared material could be utilized as a recyclable adsorbent regenerated by using NaOH-NaCIO binary solution. Therefore, the synthesized FeOOH-loaded MnO2 in this study has the potential to be applied as an emergency material for thallium pollution incident. (C) 2017 Elsevier Ltd. All rights reserved.
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