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Lv D.,Nanchang Hangkong University | Ou J.,Nanchang Hangkong University | Hu W.,Nanchang Hangkong University | Luo X.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle | Wang F.,Nanchang Hangkong University
RSC Advances | Year: 2015

A one-step and solvent-free process was developed to fabricate a superhydrophobic surface on copper by higherature oxidation (300 °C) in an atmosphere of gasified 1-dodecanethiol (DT). The so-obtained superhydrophobic surface on a copper mesh was used to build a miniature oil containment boom (MOCB) that was used for oil spill collection. It was found that the MOCB was efficient with a collection rate of over 89% and durable with a negligible decrease in collection rate and deterioration in superhydrophobicity even after 25 cycles of kerosene collection. © The Royal Society of Chemistry 2015.

Shen T.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle | Shen T.,Nanchang Hangkong University | Luo J.,CAS Research Center for Eco Environmental Sciences | Zhang S.,CAS Research Center for Eco Environmental Sciences | And 2 more authors.
Journal of Environmental Chemical Engineering | Year: 2015

Hierarchically mesostructured MIL-101 metal-organic frameworks (MOFs) were synthesized using anhydrous sodium acetate or hydrofluoric acid as a mineralizing agent and cetyltrimethylammonium bromide (CTAB) as a structure-directing agent. These new materials were then used to adsorb and remove the anionic dye methyl orange (MO) and the cationic dye methylene blue (MB) from contaminated water. The adsorption performance was systematically investigated and discussed. Experimental results revealed that the amount of MB adsorbed on MIL-101 that was prepared using sodium acetate is about 3.2 times the amount adsorbed on MIL-101 prepared using hydrofluoric acid, but quantities of adsorbed MO by the two adsorbents were nearly the same. Adsorbents synthesized with higher CTAB content had a higher content of the meso- and macro-scale pores, which favored the MB adsorption but impeded the MO adsorption. Dye adsorption is partially governed by the electrostatic interaction between the dye and the adsorbent, because the mineralizing agent can vary the charge carried by framework in a dye solution. The MB and MO adsorption kinetics followed a pseudo-second-order model, and the equilibrium dye adsorption data provided a good Langmuir model. © 2014 Elsevier Ltd. All rights reserved.

Chen P.,Nanchang Hangkong University | Zhang W.,Nanchang Hangkong University | Zhang W.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle | Li M.,Nanchang Hangkong University | And 5 more authors.
RSC Advances | Year: 2016

A novel magnetic composite of La-Zr was prepared by co-precipitation method, and its fluoride removal ability was investigated in batch studies. The sample was characterized by SEM, EDS and FTIR. Influence of various factors such as pH, presence of coexisting anions, contacting time and initial fluoride concentration were studied in detail by batch sorption experiments. The equilibrium data fitted to Langmuir, Freundlich and Lan-Fre isotherm model, and the maximum sorption capacity was calculated to be 88.5 mg g-1, which is higher than lots of previous adsorbents. The kinetic data can be described well by the pseudo-second-order kinetic model. It was indicated that the overall rate of fluoride sorption is likely to be controlled by chemisorption process. Based on the results, the mechanism of adsorption was discussed in detail. There is no calcination in the preparing process, so this material is considered to be lower cost as compared with some metal elements-based oxides adsorbents, and is beneficial for the practical application. © The Royal Society of Chemistry 2016.

Luo X.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle | Luo X.,Nanchang Hangkong University | Liu L.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle | Liu L.,Nanchang Hangkong University | And 4 more authors.
Journal of Materials Chemistry A | Year: 2013

A novel Pb(ii) ion-imprinted crown ether (Pb(ii)-IIP) was prepared by inverse emulsion polymerization using 4-vinylbenzo-18-crown-6 as a functional monomer. Pb(ii)-IIP showed higher capacity and selectivity than the non-imprinted crown ether (NIP). The monolayer adsorption capacities of Pb(ii)-IIP and NIP for Pb(ii) ions were 27.95 and 13.54 mg g-1, respectively. The relative selectivity coefficients of Pb(ii)-IIP for Pb(ii)/Zn(ii), Pb(ii)/Co(ii), Pb(ii)/Ni(ii) and Pb(ii)/Cd(ii) were 617.79, 500.56, 52.28 and 201.15, respectively. Kinetics studies showed that the adsorption process closely agreed with a pseudo-second-order model. Pb(ii)-IIP exhibited good regeneration, and the adsorption capacity of Pb(ii)-IIP was stable within the first three cycles without obvious decrease. Moreover, Pb(ii)-IIP showed almost 100% removal efficiency for Pb(ii) ions in real environmental water samples, indicating that Pb(ii)-IIP could have wide application prospects in Pb(ii) removal. © 2013 The Royal Society of Chemistry.

Zhong X.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle | Zhong X.,Nanchang Hangkong University | Deng F.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle | Deng F.,Nanchang Hangkong University | And 4 more authors.
Microchimica Acta | Year: 2013

We describe a molecularly imprinted polymer (MIP) for the solid-phase extraction of the skin protectant allantoin. The MIP was deposited on the surface of monodisperse silica microspheres possessing acroyl groups on the surface (MH-SiO2). The resulting MIP microspheres (MH-SiO2@MIP) showed a 3.4-fold higher adsorption capacity and a 1.9-fold better selectivity for allantoin than the respective non-imprinted polymer (MH-SiO2@NIP). The monolayer adsorption capacities of the MH-SiO2@MIP and the MH-SiO2@NIP were calculated with the help of the Langmuir model and found to be 6.8 and 1.9 mg•g-1, respectively. Adsorption kinetics fit a pseudo-second order rate mechanism, with an initial adsorption rate of 1.44 for the MH-SiO2@MIP, and of 0.07 mg•g-1•min-1 for the MH-SiO2@NIP. The material can be regenerated, and its adsorption capacity for allantoin remains stable for at least five regeneration cycles. It was successfully used as a sorbent for the selective solid-phase extraction of allantoin from Rhizoma dioscoreae. [Figure not available: see fulltext.] © 2013 Springer-Verlag Wien.

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