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Glutathione-functionalized melamine sponge, a mimic of a natural antidote, as a quick responsive adsorbent for efficient removal of Hg(II) from aqueous solutions
Mao, XY (Mao, Xinyou)[ 1,2 ]; Wang, L (Wang, Lan)[ 1 ]; Wang, CY (Wang, Chuanyi)[ 1,3 ]; Lichtfouse, E (Lichtfouse, Eric)[ 4 ]
2018
Source PublicationENVIRONMENTAL CHEMISTRY LETTERS
ISSN1610-3653
Volume16Issue:4Pages:1429-1434
Abstract

Minamata disease is caused by methylmercury, which is produced by microorganisms from inorganic mercury ions, Hg(II), in the aquatic environment. Adsorption is a feasible method to remove Hg(II) from waters, but there are some drawbacks when using conventional adsorbents, for example, tedious solid-liquid separation, slow response, and excessive residual levels of mercury. In this work, a novel spongy adsorbent has been developed for Hg(II) removal via surface functionalization of melamine formaldehyde sponge by glutathione. This material mimics a natural antidote that removes trace heavy metals in the human body. Results show that the functionalized sponge displays a 99.99% removal efficiency for low concentrations of Hg(II) of 10mg/L. As a consequence, the residual Hg concentration is lower than 0.005mg/L, which is slightly below the standard for total mercury in drinking water, of 0.006mg/L, formulated by theWorld Health Organization, and much lower that the discharge regulation standard, of 0.01mg/L, set by the ministry of environmental protection of China. Adsorption kinetic studies indicate that the functionalized sponge has a fast response. Indeed, the adsorption equilibrium can be reached within 10min, and about 80% of total adsorption capacities are reached in 1min. Moreover, the maximum adsorption capacity of the glutathione-functionalized sponge is as high as 240.02mg/g, as shown by adsorption isotherm. Overall our findings disclose the great potential of the developed sponge adsorbent for rapid and efficient removal of Hg(II) from water.

KeywordDopamine Glutathione Hg(II) Melamine Responsive Sponge
DOI10.1007/s10311-018-0746-3
Indexed BySCI
WOS IDWOS:000451136500018
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/7105
Collection环境科学与技术研究室
Affiliation1.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Shaanxi Univ Sci & Technol, Xian 710021, Shaanxi, Peoples R China
4.Aix Marseille Univ, Coll France, Cerege, CNRS,INRA,IRD,Europole Mediterraneen Arbois, F-13545 Aix En Provence, France
Recommended Citation
GB/T 7714
Mao, XY ,Wang, L ,Wang, CY ,et al. Glutathione-functionalized melamine sponge, a mimic of a natural antidote, as a quick responsive adsorbent for efficient removal of Hg(II) from aqueous solutions[J]. ENVIRONMENTAL CHEMISTRY LETTERS,2018,16(4):1429-1434.
APA Mao, XY ,Wang, L ,Wang, CY ,&Lichtfouse, E .(2018).Glutathione-functionalized melamine sponge, a mimic of a natural antidote, as a quick responsive adsorbent for efficient removal of Hg(II) from aqueous solutions.ENVIRONMENTAL CHEMISTRY LETTERS,16(4),1429-1434.
MLA Mao, XY ,et al."Glutathione-functionalized melamine sponge, a mimic of a natural antidote, as a quick responsive adsorbent for efficient removal of Hg(II) from aqueous solutions".ENVIRONMENTAL CHEMISTRY LETTERS 16.4(2018):1429-1434.
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