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Type: Journal article
Title: Chemodosimeter functionalized diatomaceous earth particles for visual detection and removal of trace mercury ions from water
Author: Patil, P.
Bhat, M.
Gatti, M.
Kabiri, S.
Altalhi, T.
Jung, H.
Losic, D.
Kurkuri, M.
Citation: Chemical Engineering Journal, 2017; 327:725-733
Publisher: Elsevier
Issue Date: 2017
ISSN: 1385-8947
Statement of
Pravin Patil, Madhuprasad, Mahesh P. Bhat, Manasa G. Gatti, Shervin Kabiri, Tariq Altalhi, Ho-Young Jung, Dusan Losic, Mahaveer Kurkuri
Abstract: The rhodamine based receptor, P2 has been developed for the detection of environmentally hazardous Hg²⁺ ions with a limit of detection, 1.5 × 10⁻⁶ M. The P2 showed a significant colour change from colourless to pink upon binding with Hg²⁺ ions. As a result, a new peak at 533 nm was observed in UV–vis spectroscopy which was attributed to spirolactum ring opening followed by through bond energy transfer (TBET). In addition, the presence of other competing cations did not interfere the detection of Hg²⁺ ions. Further, P2 has been successfully immobilized onto the naturally available and highly porous diatomaceous earth particles (P2D) for removal of Hg²⁺ ions from water. The covalently attached organic molecule in P2D forms complex with Hg²⁺ ion present in the water and thus traps the Hg²⁺ ions. Based on this, a proof-of-concept cartridge has been developed for water purification. The cartridge having 450 mg of P2D was able to purify 30 mL of water containing 1 ppm Hg²⁺ ions. The efficiency of cartridge could be visualized with a colour change from colourless to pink.
Keywords: Diatomaceous earth; chemodosimeter; mercury detection and removal; through bond energy transfer; cartridge; colour change
Rights: © 2017 Elsevier B.V. All rights reserved.
RMID: 0030076825
DOI: 10.1016/j.cej.2017.06.138
Appears in Collections:Agriculture, Food and Wine publications

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