Preparation of magnetic hierarchical porous carbon spheres with graphitic features for high methyl orange adsorption capacity

The preparation of synthetic graphite materials with hierarchical pores from lignite by one-step impregnation and their characterization as dye absorbents

“…This indicates that ILG-2700 has a better recycling performance and economic value compared with other adsorption materials. [52][53][54][55] The gradual decrease in the adsorption capacity may be due to the fact that methyl orange without desorption occupies the adsorption site; this results in a slight decrease in subsequent adsorption or change in the ILG-2700 structure during desorption and regeneration. Therefore, further studies are required to improve the desorption rate to ensure that the surface of ILG-2700 aer desorption has less residual methyl orange.…”

Synthesis of Hierarchical Porous Carbon in Molten Salt and Its Application for Dye Adsorption

“…The following pseudo-first-order and pseudo-second-order kinetic models [1] were also used to assist understanding the relevant adsorption mechanism:Pseudo-first-order model: qt=qefalse(1−e−k1tfalse) Pseudo-second-order model: tqt=1κ2qe2+tqe where q t (mg/g) is the adsorption amount at time t , k 1 and k 2 (g·mg −1 ·min −1 ) are respectively the pseudo-first-order and pseudo-second-order rate constants.…”

“…Dyes have long been used in plastic, paper, leather, textile, and other industrial sectors. Wastewaters discharged from these industrial sectors often contain a certain amount of dyes, especially water-soluble organic dyes, due to their low biodegradability [1,2,3]. The conventional biological treatment processes fail to effectively treat these dye wastewaters, due to which, several physical or chemical processes, including osmosis [4], electro flotation [5], chemical oxidation [6], ion exchange [7], and filtration [8], have been developed in recent years.…”

Carbon Nano-Sphere Derived From Crop Residues by Acidic Lithium Bromide Treatment and as an Excellent Adsorbent to Both Heavy Ions and Methyl Orange

“…The fabrication of carbon spheres has attracted extensive attention in the eld of materials science. Due to its unique properties, such as surface functional chemical groups, surface area and controllable particle size, carbon spheres have broad application prospects in catalysis, electrochemical conversion, energy storage and environmental puri cations (Bai et al, 2018;Liang et al, 2008;Mao et al, 2018;Mi et al, 2008;Siyasukh et al, 2018;Tian et al, 2019). The properties of carbon spheres were highly relied on the synthesis method.…”