Enhancing adsorption capacity of nano-adsorbents via surface modification: A review
| Autor: | N.H.M. Chikuruwo, Ch. Shilpa Chakra, Milton Manyangadze, T.B. Narsaiah, M. Radhakumari, Gwiranai Danha |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Chemistry 020209 energy Process Chemistry and Technology Metal ions in aqueous solution Nanoparticle lcsh:TP155-156 Filtration and Separation 02 engineering and technology Catalysis Hydrothermal circulation Education Adsorption 020401 chemical engineering Chemical engineering Close relationship Specific surface area Nano 0202 electrical engineering electronic engineering information engineering Surface modification 0204 chemical engineering lcsh:Chemical engineering Energy (miscellaneous) |
| Zdroj: | South African Journal of Chemical Engineering, Vol 31, Iss, Pp 25-32 (2020) |
| ISSN: | 1026-9185 |
| Popis: | In this review, the role of surface modification of nanoparticles to enhance their performance as adsorbents was explored. Performance was assessed by comparisons on adsorption capacities of differently modified nanoparticles (silica, iron, and alumina based nanoparticles) on different heavy metal ions (Cu, Cd, Co, Ni, Pb, As, Cr, Zn, Mn, and Hg). A comparison of pure and modified materials revealed that the modified materials gave superior adsorption capacities. A close relationship was observed between the various modification methods and the adsorption capacities of particles synthesized by hydrothermal methods giving the highest adsorption capacities. Surface modification also had a direct effect on the specific surface area which decreased with the degree of functionalization. The adsorption capacity was however generally observed to increase with the degree of functionalization. Keywords: Surface modification, Nanoparticles, Adsorption capacity, Hydrothermal, Specific surface area, Functionalization |
| Databáze: | OpenAIRE |
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