Improved lead removal from aqueous solution using novel porous bentonite - and calcite-biochar composite

Thermochemical Conversion of Biomass Waste-Based Biochar for Environment Remediation

“…At higher temperature, the organic matter of biomass is carbonized, and surface area and porosity increase that further facilitates the chances of pollutant adsorption. Similar results are reported for adsorption of trichloroethylene [56], Cd [18], methylene blue [26], and Pb [40]. Increased temperature also renders alkaline pH, increase in mineral components such as K, Ca, Mg, and P that further enhances the chances of metal adsorption.…”

“…Different types of biochar have been successfully investigated for their role as agronomic entity as well as for environmental remediation. Some of this include its use for carbon storage, soil carbon sequestration, soil amendment, enhancing crop yield, and pollutant removal from aqueous and soil medium [38][39][40]48].…”

“…Different properties of biochar enable it to remove pollutant from target medium. Some of these properties include high specific surface area, microporous structure, alkaline pH, high cation exchange capacity, and presence of minerals such calcite, dolomite, periclase, sylvite, montmorillonite, and quartz [39,40] and functional groups such as carbonyl, hydroxyl, phenolic, and carboxyl that play an important role in pollutant removal.…”

Removal of Pb(II) in Aqueous Solutions Using Synthesized Zeolite X from Ecuadorian Clay

“…Adsorption is an efficient separation technique that has been in use for a long time to remove heavy metal ions. In aqueous solutions, a wide variety of solid adsorbents have been reported, such as natural zeolites (Belova, 2019), bentonite (Ramola, Belwal, Li, Wang, and Zhou, 2020), cassava peel (Albis, 2016), activated carbon (Zafarzadeh, Sadeghi, Golbini-Mofrad, and Beirami, 2018), carbon nanotubes (Wang, Zhou, Peng, Yu, and Yang, 2007) or clay monoliths (Ahrouch, Gatica, Draoui, Bellido, and Vidal, 2019), among others.…”

Separation and determination of Pb (II) ions from aqueous media by cloud point extraction

“…Lead adversely affects nervous system, gastro-intestinal track, kidneys, reproductive system and also cause encephalopathy, neuro-behavioral deficits. 9 Due to all these adverse effects, the determination of heavy metals in waters is of prime importance for human and environment health. 10 Consequently, many technologies such as adsorption, 11 chemical precipitation, 12 flocculation, 13 ion exchange and membrane filtration.…”