Environmental remediation in circular economy: End of life tyre magnetic pyrochars for adsorptive removal of pharmaceuticals from aqueous solution

Comparative study of solvothermal and catalytic solvothermal carbonization of rice husk for Fe(iii), Zn(ii), Cu(ii), Pb(ii) and Mn(ii) adsorption, kinetics, surface chemistry and reaction mechanism

“…The aromatic rings of the char surface form a π-system and enable π–π interaction between the aromatic rings of the char surface and the heavy metal ions, which consequently attract cations to be bound on the char surface. 65 Cations of multi-heavy metals are positively charged. Rice husk hydro-/solvochar/catalytic solvochar is negatively charged and contains electrons (e − ) since all the hydro-/solvochars presented a surface charge of ∼−20–41 mV based on zeta potential analysis.…”

“…Environmental Science: Water Research & Technology Paper oxygen-containing functional groups, (iv) electron transfer/ redox, (v) π-π interaction, and (vi) surface precipitation. [63][64][65] Physical adsorption causes physisorption, while other factors act for chemisorption. Physisorption is mainly driven by surface area and porosity.…”

Enhancement of resource recovery from retired tires: Extraction of copper and zinc resources

“…Disposal methods for the purpose of producing high value-added products, such as refurbishment, reclaimed rubber, pyrolysis products, building materials, thermal insulation materials, leachate treatment media, etc., have become the main utilization strategies for retired tires [8,9]. Particularly, carbon black made from the pyrolysis of retired tires has the potential to substitute commercial materials in fuel cell anodes and multipurpose adsorbents [10][11][12]. However, the tire structure is diverse, in addition to rubber, tires also contain about 15 wt% of steel wire used to reinforce the structure.…”