Iron oxide loaded biochar/attapulgite composites derived camellia oleifera shells as a novel bio-adsorbent for highly efficient removal of Cr(VI)

Fabrication of Iron-Containing Biochar by One-Step Ball Milling for Cr(VI) and Tetracycline Removal from Wastewater

“…The diffraction peak of the amorphous carbon structure of BC was observed at 22°, and the diffraction peak corresponding to the graphitic carbon structure was observed at 44°. 9 The broad diffraction peak of BC at 22°may be attributed to the presence of oxygencontaining functional groups (C−O, O−C−O, and −OH). 9 Compared with BC, the SiO 2 (PDF No.…”

“…9 The broad diffraction peak of BC at 22°may be attributed to the presence of oxygencontaining functional groups (C−O, O−C−O, and −OH). 9 Compared with BC, the SiO 2 (PDF No. 89−1691) signal peaks of MBC and Fe@MBC only appear at around 26.6°, which was shown to be different.…”

“…The surface charge of the adsorbent and the ionic state of the functional groups are pinned by pH, and the species of ions in the adsorbate−adsorbent system are also set by pH. 9 In this paper, the pH of the initial Cr(VI) and TC solution was set at 3−11, and the effect results are shown in Figure 4a. It was found that the Cr(VI) uptake on Fe@MBC was best at pH = 3.0.…”

“…48 After the adsorption process, the absorption peak of Cl 2p weakened significantly, indicating that anion exchange occurred between Cl on the surface of Fe@MBC and Cr(VI) in solution. 9,44 The C 1s spectrum (Figure 5b) showed three distinct peaks of Fe@MBC at 284.48, 285.08, and 287.88 eV, which corresponded to C−C, C−O/C�O, and −COOH, respectively. 9 Upon adsorption of Cr(VI), the surface molar ratios of C−C, C−O/C�O, and −COOH bonds in Fe@MBC changed, resulting in a shift in peak positions.…”

Investigation on the Potential Application of Na-Attapulgite as an Excipient in Domperidone Sustained-Release Tablets

“…The characteristic peaks at 2θ = 8.48°, 19.83°, 20.86°, 27.94° and 35.12° are attributed to the characteristic reflections of the 110, 040, 121, 400 and 161 crystal planes of attapulgite. In addition, the characteristic peaks at 2θ = 26.64° and 30.88° are assigned to the characteristic reflections of the quartz and dolomite crystal planes [ 33 , 34 , 35 ]. The Na-ATP sample showed almost the same XRD pattern, indicating that the crystal structure was not affected by the Na 2 CO 3 treatment.…”