One-pot preparation of P(TA-TEPA)-PAM-RGO ternary composite for high efficient Cr(VI) removal from aqueous solution

Novel design of alumina foams with three‐dimensional reticular architecture for effective high‐temperature particulate matter capture

“…Compared with O1s spectrum of CB, new peak of O1s spectrum located at 532.3 eV (C=O) is detected in GCB, indicating the formation of ester group on its surface (Figure E) . The N1s spectrum of GCB is comprised of two peaks of 398.9 (C–N) and 400.8 eV (NH), confirming the formations of amine and amide groups on its surface (Figure F) . All these results of XPS further confirm the introduction of carbamate groups on CB surface.…”

“…30 The N1s spectrum of GCB is comprised of two peaks of 398.9 (C-N) and 400.8 eV (NH), confirming the formations of amine and amide groups on its surface ( Figure 3F). 31,32 All these results of XPS further confirm the introduction of carbamate groups on CB surface.…”

The development of a ternary nanocomposite for the removal of Cr(vi) ions from aqueous solutions

“…This result is attributed to the repellency between the Cr(VI) ions in the solid and liquid phases, resulting in a lower adsorption rate until equilibrium is reached. 32,45 The highest capacities (q e ) for 10 and 30 mg L À1 Cr(VI) of 9.99 and 29.98 mg L À1 were achieved at 10 and 20 min, respectively. The mechanism of Cr(VI) adsorption on the PANI/Ag (AMPSA)/GO QDs NC was investigated using the pseudo-rst and pseudo-second order models.…”

“…The kinetic experiments show that the rate of Cr(VI) adsorption on the surface of PANI/Ag (AMPSA)/GO QDs NC increased as the temperature increased from 22 C to 60 C, which suggests that adsorption process is endothermic and spontaneous. 29,33,45,48 The enlargement of pore size and activation of the adsorbent surface at high temperature promote rate of adsorption. 45,49 The rate constant k 2 for each temperature (Table 2) was obtained by tting the data to the linear pseudo-second order kinetic model, as shown in Fig.…”

“…This is attributed to the weak competition from the monovalent Cl À ions and the strong covalent bonds between the Cr(VI) ions and amine groups of PANI. 45 In addition, a further increase in NaCl concentration to 1000 mM led to a decline in R by 12.8% due to the reduction in the number of collisions between Cr(VI) ions and PANI/Ag (AMPSA)/GO QDs. 48 Industrial wastewater also contains other types of heavy metal cations and anions such as Cd(II), Cu(II), Pb(II), Al(III) and Mg(II).…”