Novel nanocomposite materials for efficient and selective mercury ions capturing from wastewater
TL;DR: In this paper, the particulate ligand impregnated highly ordered mesoporous silica based optical nanocomposite material was used for the sensitive and selective detection and removal of mercury (Hg(II)) from polluted water solutions.
About: This article is published in Chemical Engineering Journal.The article was published on 2017-01-01. It has received 367 citations till now. The article focuses on the topics: Metal ions in aqueous solution & Environmental pollution.
Citations
More filters
TL;DR: This review focuses on recent progress in reported MOFs and MOF-based composites as superior adsorbents for the efficient removal of toxic and nuclear waste-related metal ions.
Abstract: Highly efficient removal of metal ion pollutants, such as toxic and nuclear waste-related metal ions, remains a serious task from the biological and environmental standpoint because of their harmful effects on human health and the environment. Recently, highly porous metal–organic frameworks (MOFs), with excellent chemical stability and abundant functional groups, have represented a new addition to the area of capturing various types of hazardous metal ion pollutants. This review focuses on recent progress in reported MOFs and MOF-based composites as superior adsorbents for the efficient removal of toxic and nuclear waste-related metal ions. Aspects related to the interaction mechanisms between metal ions and MOF-based materials are systematically summarized, including macroscopic batch experiments, microscopic spectroscopy analysis, and theoretical calculations. The adsorption properties of various MOF-based materials are assessed and compared with those of other widely used adsorbents. Finally, we propose our personal insights into future research opportunities and challenges in the hope of stimulating more researchers to engage in this new field of MOF-based materials for environmental pollution management.
1,327 citations
TL;DR: In this paper, a ligand was anchored with mesoporous silica, named as nano-composite materials, which was applied in the detection and adsorption of cadmium (Cd(II)) ions from wastewater samples.
351 citations
TL;DR: In this paper, the mesoporous silica and ligand embedded composite adsorbent were characterized to understand ordered porosity in the frameworks and the composite was protonated before going to start the adsorption by using 2.0 mM HCl.
294 citations
TL;DR: In this article, a composite material was successfully prepared by the building-block immobilization of (3-(methoxycarbonyl)benzylidene) hydrazinyl)benzoic acid onto the highly ordered mesoporous silica.
272 citations
TL;DR: In this paper, a mesoporous conjugate adsorbent (MCA) was fabricated by directly anchoring the organic ligand of 2-hydroxyacetophenone-4N-pyrrolidine thiosemicarbazones (HAPT) onto highly ordered ZSM-5 for efficient and selective mercury (Hg(II)) ions capturing from aqueous solution.
265 citations
References
More filters
1,904 citations
TL;DR: Whereas removal of certain forms of mercury, such as that in blood-pressure cuffs, will not cause increased health risks, removal of each of the three major sources described in this article entails health risks and thus poses a dilemma to the health professional.
Abstract: ercury has been used commercially and medically for centuries. In the past it was a common constituent of many medications. It is still used in hospitals in thermometers and blood-pressure cuffs and commercially in batteries, switches, and fluorescent light bulbs. Large quantities of metallic mercury are employed as electrodes in the electrolytic production of chlorine and sodium hydroxide from saline. These uses still give rise to accidental and occupational exposures. 1 Today, however, exposure of the general population comes from three major sources: fish consumption, dental amalgams, and vaccines. Each has its own characteristic form of mercury and distinctive toxicologic profile and clinical symptoms. Dental amalgams emit mercury vapor that is inhaled and absorbed into the bloodstream. Dentists and anyone with an amalgam filling are exposed to this form of mercury. Liquid metallic mercury (quicksilver) still finds its way into homes, causing a risk of poisoning from the vapor and creating major cleanup costs. Humans are also exposed to two distinct but related organic forms, methyl mercury (CH 3 Hg + ) and ethyl mercury (CH 3 CH 2 Hg + ). Fish are the main if not the only source of methyl mercury, since it is no longer used as a fungicide. In many countries, babies are exposed to ethyl mercury through vaccination, since this form is the active ingredient of the preservative thimerosal used in vaccines. Whereas removal of certain forms of mercury, such as that in blood-pressure cuffs, will not cause increased health risks, removal of each of the three major sources described in this article entails health risks and thus poses a dilemma to the health professional. Exposure to mercury from dental amalgams and fish consumption has been a concern for decades, but the possible risk associated with thimerosal is a much newer concern. These fears have been heightened by a recent recommendation by the Environmental Protection Agency (EPA) that the allowable or safe daily intake of methyl mercury be reduced from 0.5 µg of mercury per kilogram of body weight per day, the threshold established by the World Health Organization in 1978, 2 to 0.1 µg of mercury per kilogram per day. 3 Table 1 summarizes the clinical toxicologic features of mercury vapor and methyl and ethyl mercury. It also includes data on inorganic divalent mercury, since this is believed to be the toxic species produced in tissues after inhalation of the vapor. 5 It is also responsible for kidney damage after exposure to ethyl mercury, since ethyl mercury is rapidly converted to the inorganic form. 13 Inorganic mercury as both mercuric and mercurous salts was also the chief cause of acrodynia, a childhood disease that is now mainly of historical interest. 14 The clinical symptoms of acrodynia consist of painful, red, swollen fingers and toes in association with photophobia, irritability, asthenia, and hypertension. It is believed to be a hypersensitivity reaction. m
1,572 citations
908 citations
TL;DR: Zwei verschiedene optische Methoden fur die Analyse von Hg2+-Ionen, die auf der Bildung von Thymin-Hg2-Komplexen beruhen, werden vorgestellt.
Abstract: Zwei verschiedene optische Methoden fur die Analyse von Hg2+-Ionen, die auf der Bildung von Thymin-Hg2+-Komplexen beruhen, werden vorgestellt. Bei diesen Methoden werden die Hg2+-Ionen mithilfe aggregierter Goldnanopartikel und einer auf der DNA-Chemie basierenden Maschine (siehe Schema) analysiert.
672 citations
TL;DR: In this article, a ligand immobilized facial composite adsorbent was prepared for sensitive and selective copper (Cu(II)) ions detection and removal from wastewater samples, and several effects such as initial pH, Cu(II) ions concentration, shaking time, foreign ions and regeneration was determined and systematically discussed.
604 citations