Removal of inorganic mercury from mine waste water by ion exchange

Adsorption behaviors of mercury from aqueous solution using sulfur-impregnated adsorbent developed from coal

“…The increasing necessity for the reduction of mercury in wastewater before the transport into the environment requires the need for research and development of better methodologies that can provide effective removal of mercury from wastewater. In general, the current available technologies include ion exchange [5][6][7][8][9][10][11][12][13][14][15][16], solvent extraction [17][18][19][20][21][22][23], precipitation [2,24], membrane separation [25,26], and adsorption [27][28][29][30][31]. The last method can be considered a costeffective method and seems to have an advantage over the other thanks to the higher removal efficiency and the flexibility of the industrial unit operation, because most of the other methods mentioned either require high-energy needs and/or large quantities of chemicals.…”

A dynamic proof of mercury elimination from solution through a combined sorption–reduction process

“…Moreover there are some solvent extraction plants for mercury removal from chlor-alkali waste liquors where a mercaptan-based extractant is used (Monteagudo and Ortiz, 2000). All these techniques display significant drawbacks such as high cost and ineffectiveness at low concentrations which limit their routine application.…”

Preparation, characterization, and Zn2+ adsorption behavior of chemically modified MCM-41 with 5-mercapto-1-methyltetrazole

“…Successful removal of metal ions from aqueous solutions using nonspecific and specific solid adsorbents has been fully demonstrated [7][8][9][10][11][12][13][14]. Nonspecific adsorbents, such as activated carbon, silica, clays, zeolites, and ion-exchange resins, suffer from inherent problems, like low removal capacity, low selectivity, long equilibrium time, or mechanical and thermal instability [7][8][9][10][11].…”

“…Nonspecific adsorbents, such as activated carbon, silica, clays, zeolites, and ion-exchange resins, suffer from inherent problems, like low removal capacity, low selectivity, long equilibrium time, or mechanical and thermal instability [7][8][9][10][11]. Specific adsorbents consist of a ligand that can specifically interact with the metal ion and a solid support, which may be an inorganic material (principally silica) or a polymer [12,13].…”