Adsorption of Pb(II) from aqueous solution by pomelo fruit peel-derived biochar

Adsorption behavior of chloramphenicol on an activated carbon from pomelo peel using KHCO3 activator

“…The strong broad peak in the 2 θ range of 20–30° and the less intense wide peak at about 43° might be attributed to the C (002) and C (100) crystal faces, respectively, which suggested that all the samples contained both graphitic and amorphous carbon. 9,26 The peak of C (002) of PMAC was observed to gradually shift to a lower angle when changing from KCl to KHCO 3 as activator, which indicated a gradually larger interlayer distance in the layer structure of the samples. 31,32 The interlayer distance in the PMAC samples activated by KHCO 3 was significantly larger than those in the other samples in the study.…”

“…Furthermore, the Q e,cal values (446.4 mg g −1 ) were very close to the experimental values Q e,exp (442.4 mg g −1 ), which determined the degree of agreement between the model and the actual data. 13,26 Therefore, the adsorption of CHL primarily occurred through a chemical process resulting from the physicochemical interaction between the two phases. 42…”

“…The second linear stage was relatively gentle, representing intra-particle diffusion, indicating the movement of CHL molecules from the PMAC surface to its inner region. 16,26 The linear fitting parameters of the two distinct phases are given in Table 3.…”

“…The pH point of zero charge (pH PZC ) of samples was determined using the pH drift method. 26 The PHS-3E pH Meter was manufactured by Shanghai Yi Electrical Scientific Instrument Co., Ltd.…”

Application of Infrared Spectroscopy in the Characterization of Lignocellulosic Biomasses Utilized in Wastewater Treatment

“…On the other hand, biopolymer compositional analysis shows that peanut shells contain 18.8% of cellulose and 81.2% of lignocellulose [68]. Table 1 shows examples of the applications of peel-based adsorbents (raw, thermally, and chemically treated) for the removal of various pollutants (heavy metals, dyes, and drugs) [69][70][71][72][73][74][75][76]. Table 1 shows the most characteristic FTIR peaks of the studied peels; the suggested removal mechanism of the target pollutant, whether physi-or chemisorption; as well as the reported maximum sorption capacity (q max , mg/g).…”