Production of activated carbon from biodiesel solid residues: An alternative for hazardous metal sorption from aqueous solution

Antiretroviral Drugs in African Surface Waters: Prevalence, Analysis, and Potential Remediation

“…The use of carbon‐based adsorbents remains the most cost‐effective method of remediation of pollutants in environmental matrices (Cao et al 2009; Hua et al 2012; Wang et al 2015; Wan et al 2015; Inyang et al 2016; Adeola and Forbes 2021a). In practice, carbon‐based adsorbents (including biochar derived from agricultural products/waste and carbonization of wood, graphene‐based materials and carbon nanotubes, and granular activated carbon/powdered activated carbon) have been used in the adsorption of several environmental contaminants (Inyang et al 2014; Ribeiro et al 2015; Creamer and Gao 2016; Rajapaksha et al 2016; Fang et al 2017, 2018; Wang et al 2017; Zhang et al 2017; Zou et al 2019; Adeola and Forbes 2020). Relative to other adsorbents, activated carbon represents a low‐cost and environmentally friendly choice (Cai et al 2019; Zhang et al 2019).…”

Sorption of cadmium (II) ion from aqueous solution onto sweet potato (Ipomoea batatas L.) peel adsorbent: Characterisation, kinetic and isotherm studies

“…These results in these residues having wide pore size distributions due to the high percentage of mesopores/macropores within their network compared to micropores as can be observed in the pore size distribution in Fig.1. Furthermore, these wide pore size distributions of mesopores/macropores in the lignocellulosic materials make them suitable for liquid phase sorption as it facilitates diffusion of the adsorbate into the adsorbent structure (Ribeiro et al, 2015;Menendez-Diaz and Martin-Gullon, 2006). However, it should be noted that the sorption properties of these residues are not only dependent on the possession of large surface areas as since porosity alone is not the only criteria required for good adsorbents.…”

Leaching of Phosphorus and Cadmium in Soils Amended with Different Bone Chars

“…Activated chars (AC) can adsorb and remove many environmental pollutants such as sulfur dioxide , nitrate , organics with high chemical oxygen demand , and heavy metals . AC can be produced by treating high‐carbon precursors ( e.g ., agricultural wastes) at high temperature and with chemical impregnation agents such as ZnCl 2 , H 3 PO 4 , KOH, or H 2 SO 4 or by physical activation using carbonization and gasification with oxygen, carbon dioxide, and steam . S‐loaded AC (AC S ) is left as a waste after AC is used to remove hydrogen sulfide from biogas, and we hypothesize that adding AC S to BC‐treated soil may raise the P‐release by mechanisms similar to those in BC plus .…”