Ecofriendly remediation technologies for wastewater contaminated with heavy metals with special focus on using water hyacinth and black tea wastes: a review

• Published in: Environmental monitoring and assessment Vol. 193; no. 7; p. 449
• Main Authors: Elbasiouny, Heba, Darwesh, Marwa, Elbeltagy, Hala, Abo-alhamd, Fatma G., Amer, Ahlam A., Elsegaiy, Mariam A., Khattab, Israa A., Elsharawy, Esraa A., Ebehiry, Fathy, El-Ramady, Hassan, Brevik, Eric C.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.07.2021; Springer Nature B.V
• Subjects: Adsorption; Aquatic plants; Atmospheric Protection/Air Quality Control/Air Pollution; Bioaccumulation; biochar; biomass; biosorbents; Black tea; Charcoal; Contaminants; Coronaviruses; COVID-19; Developing countries; Earth and Environmental Science; Ecology; Ecotoxicology; Eichhornia; Eichhornia crassipes; Environment; Environmental health; Environmental impact; Environmental Management; Environmental Monitoring; Environmental science; Epidemics; Floating plants; Freshwater plants; Freshwater resources; Heavy metals; Humans; Introduced species; Invasive species; LDCs; Metals; Metals, Heavy - analysis; Methods; Monitoring/Environmental Analysis; Pollutants; Population growth; remediation; Tea; Wastes; Wastewater; Wastewater pollution; Wastewater treatment; Water hyacinths; Water Pollutants, Chemical - analysis; Water pollution; Water shortages; Water treatment; Wastes; Biochar; Wastewater treatment; Polluted wastewater
• ISSN: 0167-6369; 1573-2959; 1573-2959
• DOI: 10.1007/s10661-021-09236-2

Treatment of water contaminated with heavy metals is challenging. Heavy metals are non-degradable, persistent in the environment, have a high dispersion capacity by water, can bioaccumulate, and represent risks to human and environmental health. Conventional treatment methods have disadvantages; however, adsorption in biomass is a highly promising method with high efficiency and low cost that avoids many of the disadvantages of conventional methods. Black tea (BT) wastes and water hyacinth (WH) have attracted attention for their ability to remove heavy metals from wastewater. Utilizing these approaches can remove contaminants and effectively manage problematic invasive species and wastes. The conventional uses of BT and WH were efficient for removing heavy metals from wastewater. Due to the unique and distinct properties and advantages of biochar and nano-forms of biosorbents, the use of BT and WH in these forms is promising to achieve sustainable heavy metals removal from wastewater. However, more study is needed to confirm preliminary results.