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A novel lotus stem-based biochar modified by ferric chloride (FeCl 3 @LS-BC) was synthesized as a low-cost adsorbent for the removal of Cr(VI) from aqueous solutions. The optimum preparation conditions, including carbonization temperature, carbonization time, activation temperature and activation time, were chosen using orthogonal design. Mass ratios of biochar to FeCl 3 were optimized. FeCl 3 @LS-BC...
By the microwave-assisted synthesis, the nano-composite Ag/ZnO–TiO 2 was prepared under cetyl trimethyl ammonium bromide (CTAB). The composition, structure and morphology were well-characterized by X-ray diffraction (XRD), diffuse reflectance (UV–vis/DRS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and N 2 adsorption–desorption measurement. The results...
This study focused on the competitive adsorption of congo red (CR) and copper by chitosan hydrogel beads in a binary adsorption system. Spectroscopic analysis, including Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) were integrated with kinetic studies to elucidate the interaction. It was determined that chitosan hydrogel beads show better adsorption performance...
Adsorption kinetics of nitrate from aqueous solutions onto modified wheat residue was studied. The wheat residue was modified by epichlorohydrin in the presence of pyridine and the adsorption kinetics was investigated in batch experiment. The results showed the modified wheat residue had great anion adsorbing capacity, the zeta potentials of RWR and MWR were −35mV and +40mV, the maximum adsorption...
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