Adsorptive removal of toxic heavy metals from wastewater using water hyacinth and its biochar: A review.
| Autor: | Ullah MH; Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh.; Department of Physics, Bangladesh University of Textiles, Dhaka, 1208, Bangladesh., Rahman MJ; Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh. |
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| Jazyk: | angličtina |
| Zdroj: | Heliyon [Heliyon] 2024 Aug 24; Vol. 10 (17), pp. e36869. Date of Electronic Publication: 2024 Aug 24 (Print Publication: 2024). |
| DOI: | 10.1016/j.heliyon.2024.e36869 |
| Abstrakt: | Heavy metal contamination in aquatic ecosystems worsens due to rapid industrial expansion. Biochar, an efficient and economical adsorbent, has attracted much interest in environmental science, particularly in removing heavy metals (HMs). The paper covers basic details on biochar, its preparation, and potential chemical and inorganic modifications. Possible adsorption mechanisms of HMs on biochar, which include electrostatic attraction, ion exchange, surface complexation, chemical precipitation, and hydrogen bonding, are also discussed. These mechanisms are affected by the type of biochar used and the species of HMs present. Research findings suggest that while biochar effectively removes HMs, modifications to the carbon-rich hybrid can enhance surface properties such as surface area, pore size, functional groups, etc., and magnetic properties in a few cases, making them more efficient in HM removal. The choice of feedstock materials is one of the key parameters influencing the sorption capacity of biochars. This review aims to investigate the use of various forms of water hyacinth (WH), including aquatic plants, biomass, biochar, and modified biochar, as effective adsorbents for removing HMs from aqueous solutions and industrial effluents through a comparative analysis of their adsorption processes. However, further studies on the diverse effects of functional groups of modified biochar on HMs adsorption are necessary for future research. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2024 The Authors.) |
| Databáze: | MEDLINE |
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