Effects of pyrolysis temperature and impregnation ratio on adsorption kinetics and isotherm of methylene blue on corn cobs activated carbons

Preparation of a Novel Sorbent Based on Pickering Emulsions Polymerization Method for Encapsulating Extractants and the Adsorption of Indium in an Aqueous Solution

“…The curve of indium adsorption on 4 ‐PEHGs as a function of time was shown in Figure S4 (Supporting Information). The pseudo‐first‐order (Equation ()) [ 27 ] and pseudo‐second‐order (Equation ()) [ 28 ] models were used to describe the adsorption process of 4‐PEHGs on indium. $$$$\begin{equation}{\rm{\;}}\log \left( {{{\rm{Q}}_{\rm{e}}}{\rm{\;}} - {\rm{\;}}{{\rm{Q}}_{\rm{t}}}} \right){\rm{\;}} = {\rm{\;\;log}}{{\rm{Q}}_{\rm{e}}}{\rm{\;}} - {\rm{\;}}\frac{{{{\rm{k}}_1}}}{{2.303}}{\rm{t}}\end{equation}$$$$ $$$$\begin{equation}{\rm{\;}}\frac{{\rm{t}}}{{{{\rm{Q}}_{\rm{t}}}}}{\rm{\;}} = {\rm{\;}}\frac{1}{{{{\rm{k}}_2}{\rm{Q}}_{\rm{e}}^2}}{\rm{\;\;}} + {\rm{\;}}\frac{{\rm{t}}}{{{{\rm{Q}}_{\rm{e}}}}}\end{equation}$$$$where Q e (mg g −1 ) is the adsorption amount required to reach the adsorption equilibrium, and Q t (mg g −1 ) is the adsorption amount at a certain time t .…”

“…The curve of indium adsorption on 4-PEHGs as a function of time was shown in Figure S4 (Supporting Information). The pseudo-first-order (Equation ( 7)) [27] and pseudo-second-order (Equation ( 8)) [28] models were used to describe the adsorption process of 4-PEHGs on indium.…”

Stability improvement of carbon-based electrodes in aqueous electrocapacitive devices

“…The surface area decrease is attributed to pore collapse and shrinkage at the high temperature. 25,26 Following the heat treatment, YP-N0 is chemically treated in 1, 3 and 5 wt% HNO 3 at 160 °C, and the adsorbed N 2 volume of the obtained carbon (YP-N1, YP-N3, and YP-N5) is descending in sequence, leading to a surface area of 1524.65 m 2 g −1 , 1392.91 m 2 g −1 , and 1197.54 m 2 g −1 , respectively. The loss of the total surface area is attributed to the corrosive effect of HNO 3 on the carbon structure and the xation of oxygen groups at the entrance and on the walls of micro-and mesopores.…”

Malachite Green Dye Adsorption from Aqueous Solution using a Ni/Al Layered Double Hydroxide-Graphene Oxide Composite Material

“…The R 2 value in the Langmuir isotherm is closer to one than the R 2 value in the Freundlich isotherm. According to Putranto et al (2022) , the Langmuir isotherm model assumes a monolayer adsorption process, limited capacity at each adsorption site, and a homogeneous surface. Ni/Al LDH and Ni/Al-GO materials have Q m values of 99.010 and 111.111 mg/g, respectively.…”