Characterization of KOH modified biochars from different pyrolysis temperatures and enhanced adsorption of antibiotics

Abstract

Treatment with KOH increased the number of surface functional groups and tetracycline adsorption at 300 °C, whereas it decreased that at 500 and 700 °C.

Biochar as heterogeneous support for immobilization of Pd as efficient and reusable biocatalyst in C–C coupling reactions

“…[8] Therefore, nanoparticles are widely employed as solid supports for heterogenization of homogeneous catalysts. [18][19][20] In fact, biochar (which is called black carbon) is charcoal which is used for soil amendment, reduction in greenhouse gas emissions from soil, adsorption, water retention, agricultural waste recycling, climate change mitigation and energy production. Biochar is a novel type of nanoparticles, which is a stable carbon solid and used in various fields in past few years for science and engineering.…”

“…[21,22] Therefore, it is inexpensive and environmentally friendly. Despite various studies of the morphology, application, properties and preparation of biochar, [18][19][20][21][22][23][24][25][26][27] currently no reports are available of the application of biochar as a catalyst support. [25] Surfaces of biochar nanoparticles are covered with carbonyl, hydroxyl and carboxylic acid functional groups.…”

Adsorption of hexavalent chromium onto alkali‐modified biochar derived from Lepironia articulata: A kinetic, equilibrium, and thermodynamic study

“…Being cost‐effective, good efficiency, and ease of use, modification of biochar using alkali treatment is an appealing technique. In general, by improving surface oxygen functional groups (SOFGs), removing ash, increasing surface area, and replacing surface charges, alkali modification advances the adsorption of metal anions, metal cations, and several ionic organic compounds by biochar (Huang et al, ; Ji, Li, Zhu, Wang, & Lin, ; Li et al, ; Mihajlović et al, ; Tseng, Tseng, Wu, Hu, & Wang, ).…”

Adsorption-assisted decontamination of Hg(ii) from aqueous solution by multi-functionalized corncob-derived biochar

“…However, the amount of desired functional groups on the biochar surface that have sorption affinity for targeted heavy metals could be enhanced through different chemical routes. 11 Therefore, chemical modication by applying different chemical reagents is so far considered as a good alternative to enhance the adsorption capacity and selectivity for targeted pollutants as well as the stability of biochar-based metallic catalysts. 12 A number of attempts have been made for biochar chemical modication in order to boost the adsorption capacity towards targeted pollutants.…”