Showing papers by "Yunguo Liu published in 2013"
TL;DR: In this article, a sulfonated magnetic graphene oxide composite (SMGO) was synthesized from graphene oxide and was used as adsorbent for removing Cu(II) ions from aqueous solution.
211 citations
TL;DR: In this article, the adsorption of Pb(II) ions from aqueous solution with ethylenediamine-modified yeast biomass coated with magnetic chitosan microparticles (EYMC) was studied in batch adaption system.
126 citations
TL;DR: In this article, the TiO 2 -impregnated glutaraldehyde-crosslinked alginate beads (TIGCAB) were applied to reduce toxic Cr(VI) to Cr(III) in acidic aqueous solution under UV irradiation.
57 citations
TL;DR: In this paper, the ability of Bacillus subtilis immobilized into chitosan beads (BICB) to remove Cu(II) from aqueous solution was studied.
55 citations
TL;DR: In this paper, a comparative X-ray analysis showed that the degree of crystallization in the imprinted polymer was significantly weakened, the area of the non-crystalline region was larger, and the adsorption capacity towards Cr(VI) was increased.
29 citations
TL;DR: In this paper, the adsorption of Cu(II and Pb(II) ions from their single and binary systems by Ca-alginate immobilized activated carbon and Saccharomyces cerevisiae (CAS) was investigated.
Abstract: To establish a theoretical foundation for simultaneous removal of multi-heavy metals, the adsorption of Cu(II) and Pb(II) ions from their single and binary systems by Ca-alginate immobilized activated carbon and Saccharomyces cerevisiae (CAS) was investigated. The CAS beads were characterized by Scanning electron microscope (SEM) and Fourier transformed infrared spectroscopy (FTTR). The effect of initial pH, adsorbent dosage, contact time and initial metal ions concentration on the adsorption process was systematically investigated. The experimental maximum contents of Cu(II) and Pb(II) uptake capacity were determined as 64.90 and 166.31 mg/g, respectively. The pseudo-second-order rate equation and Langmuir isotherm model could explain respectively the kinetic and isotherm experimental data of Cu(II) and Pb(II) ions in single-component systems with much satisfaction. The experimental adsorption data of Cu(II) and Pb(II) ions in binary system were best described by the extended Freundlich isotherm and the extended Langmuir isotherm, respectively. The removal of Cu(II) ions was more significantly influenced by the presence of the coexistent Pb(II) species, while the Pb(II) removal was affected slightly by varying the initial concentration of Cu(II). The CAS was successfully regenerated using 1 mol/L HNO3 solution.
20 citations
TL;DR: In this paper, Fenton oxidation was used as the pretreatment of 2-chlorophenol wastewater with the objective of dechlorination, as it was considered that after breakage of aryl-Cl bond, the generated intermediates may be easily biodegraded.
Abstract: Fenton oxidation was used as the pretreatment of 2-chlorophenol wastewater with the objective of dechlorination, as it was considered that after breakage of aryl—Cl bond, the generated intermediates may be easily biodegraded. Hence, the optimization of pH and the low Fenton reagent doses for dechlorination was investigated. More than 99% dechlorination is obtained at the optimal pH 4 and the Fenton reagent doses of 86 mmol/L H2O2 and 2.87 mmol/L Fe2+. The corresponding 2-chlorophenol is degraded completely, 80.02% COD is also removed, and the biodegradability, evaluated in terms of the BOD5/COD ratio, is increased up to 0.41. To test the effect of this pretreatment, the pretreated 2-chlorophenol wastewater was fed to a sequencing batch reactor (SBR). The results show that complete mineralization is achieved. It is demonstrated that, for the treatment of recalcitrant compounds like 2-chlorophenol, the Fenton pretreatment could be quite effective and economical for enhancing the biodegradability in a Fenton-biological coupled system.
1 citations