Removal of mercury by adsorption: a review

Abstract

Due to natural and production activities, mercury contamination has become one of the major environmental problems over the world. Mercury contamination is a serious threat to human health. Among the existing technologies available for mercury pollution control, the adsorption process can get excellent separation effects and has been further studied. This review is attempted to cover a wide range of adsorbents that were developed for the removal of mercury from the year 2011. Various adsorbents, including the latest adsorbents, are presented along with highlighting and discussing the key advancements on their preparation, modification technologies, and strategies. By comparing their adsorption capacities, it is evident from the literature survey that some adsorbents have shown excellent potential for the removal of mercury. However, there is still a need to develop novel, efficient adsorbents with low cost, high stability, and easy production and manufacture for practical utility.

Electrospun poly(2‐aminothiazole)/cellulose acetate fiber membrane for removing Hg(II) from water

“…The Hg(II) adsorption capacity of various adsorbents has been well‐documented . By comparison, it can be seen that the 0.1 g PAT/1.44 g CA composite fiber membrane has a moderate adsorption capacity (137.5 mg/g by test in Table and 177 mg/g by Langmuir model in Table , 298 K) with a very low PAT percentage (6.5 wt %).…”

The Characteristic of Macromolecule Heavy Metal Flocculant and Trapping CSAX of Hg²+ from Aqueous Solutions

“…The flask was immersed in a water bath and heated to 45℃ under nitrogen atmosphere. The predetermined volume of CAN solution was added as known molar solution in 1M HNO 3 . The polymerizationwas continued by constantly stirring and maintained at a nitrogen atmosphere for 3h.…”

“…If it directly discharged into water body, the mercury is a well-known highly toxic metal, considered a priority pollution. Through the physical, chemical and biological functions, the mercury and its compounds will form various forms of mercury, even into very poisonous methyl compounds, which seriously pollute the water environment [3].…”

Kinetics and Isotherms of Mercury Biosorption by Dry Biomass of Arthrospira (Spirulina) platensis

“…Finally, a maximum value of 10 mg m −3 was established by USEPA . To ensure compliance with these regulatory standards, it was proposed Hg adsorption onto adsorbent materials including activated carbon from different vegetable sources, silica and fibers either functionalized or not, rootles, sulfurized agro‐based adsorbents, clays, resins, and composite materials , which, however, are not used on a large scale due to their high cost. The use of adsorbents to remove toxic heavy metals from waters has been deeply reviewed , .…”