Efficient elimination of organic and inorganic pollutants by biochar and biochar-based materials

Abstract

Biochar have received multidisciplinary attention because of their extraordinary physicochemical properties. In this review, the application of biochar and biochar-based materials for the efficient elimination of organic and inorganic pollutants are summarized. The sorption of organic chemicals and heavy metal ions/radionuclides, degradation/transformation of organic pollutants, and sorption-reduction-solidification of high-valent metal ions are described in detail. The interaction mechanism at molecular level from advanced spectroscopic techniques and theoretical calculations is discussed. Finally, the challenges in the application of biochar and biochar-supported materials in the immobilization of heavy metal ions and photocatalytic degradation of persistent organic pollutants in soils or wastewater are pointed out. This review is helpful for the graduate students to understand the recent works about biochar and biochar-supported materials in environmental pollutants management.

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe2O4 Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

“…It is also convenient to operate, which could reflect the interaction behavior between the pollutants and adsorbents on the solidliquid interface. [7] Biochar, as a new adsorption material, has been increasingly applied into the field of adsorption, due to its lower cost and more convenient preparation, [8] compared with the traditional adsorption materials (including activated carbon, [9,10] silica, [11] polymer resins [12] ). Meanwhile, biochar displays excellent adsorption performance for organic pollutants and heavy metals and is widely used in wastewater treatment.…”

Photocatalytic kinetics and cyclic stability of photocatalysts Fe-complex/TiO2 in the synergistic degradation of phenolic pollutants and reduction of Cr(VI)

“…Many works had been focused on it. For example, visible-light-induced or Z-scheme photocatalytic system, such as g-C 3 N 4 -based materials (Chen et al 2020;Zhang et al 2020), biochar and biochar-based materials (Hu et al 2020), NiGa 2 O 4 /BiVO 4 (Qu et al 2017), TiO 2 / CdS (Wang et al 2018), BiPO 4 /TiO 2 /g-C 3 N 4 (Obregón et al 2016), TiO 2 /g-C 3 N 4 (Wei et al 2017a, b), and TiO 2 /Bi 2 O 4 (Zhang et al 2018), had been prepared to obtain more efficient separation of photoexcited electron-hole pairs. A variety of materials with different morphology also can effectively improve the separation efficiency of photogenerated carriers because of their large surface area.…”

Comparative Study of Toluene and Hexane Adsorption on Activated Carbons From Gas and Liquid Phase. Enthalpy and Isotherms

“…Among the porous materials, activated carbon is used since it is a hydrophobic solid that can be physically or chemically modified to generate greater selectivity for adsorptives of interest, giving rise to interactions type π-π electron donor-acceptor, Hbonding, pore-filling, Lewis acid-base interactions or electrostatic attraction, depending of the adsorbate (Chen et al, 2020;Hu et al, 2020).…”