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Rongjun Qu,Xilu Ma,Minghua Wang,Changmei Sun,Xiaomei Sun,Shaoying Sun,Ying Zhang,Ping Yin 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
A series of low generation dendrimer polyamidoamine grafted silica gels (named SiO2-G1.0, SiO2-G2.0,SiO2-G3.0) were synthesized via the homogeneous route. The new materials were characterized byscanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermal analysis,pore and surface area analysis, X-ray diffraction analysis (XRD) and elemental analysis. The adsorptionproperties of the three products for Au3+ were studied by batch methods. The adsorbents prepared viathe homogeneous route showed higher adsorption capacities than those via the heterogeneous route. The maximum adsorption capacities for the three could reach up to 1.48, 2.45, and 2.21 mmol g-1,respectively.
Ping Yin,Rongjun Qu,Mingyu Xu,Wei Liu,Xiguang Liu,Qiang Xu 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
The novel functional composite silica microspheres encapsulated by organophosphonated polystyrene(SG–PS–N–P) has been successfully synthesized. SG–PS–N–P was employed to adsorb Au(III) fromsimulated wastewater, and it exhibited excellent performance, and the maximum adsorption capacitywas 980.39 mg/g at 35 ℃. The adsorption process optimization was performed using response surfacemethodology (RSM), and the analysis of variance (ANOVA) of the quadratic model demonstrated that themodel was highly significant. Moreover, the regeneration capacities of SG–PS–N–P were investigated,and it has been found that the adsorption capability remains high after several cycles of adsorption–desorption.
Biodiesel production from the esterification of fatty acid over organophosphonic acid
Wei Liu,Xiguang Liu,Shaohua Zhang,Rongjun Qu 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Biodiesel production from the esterification of fatty acid (stearic acid) with ethanol catalyzed by PA/NaY(PA = organophosphonic acid, NaY = NaY molecular sieve) was investigated, and the effects of PA loading,catalyst amount, molar ratio of ethanol to acid, reaction time and temperature on the esterificationreaction were examined. The optimumvalues for maximum esterification percentage can be obtained byusing a Box–Behnken center-united design with a minimum of experimental work. The pseudohomogeneous(PH) model has been used to simulate the experimental data, and the calculated values ofArrhenius coefficient and activation energy are 6.394 103 and 70.51 kJ/mol, respectively.
Rao Fu,Congcong Dong,Changmei Sun,Rongjun Qu,Chunnuan Ji,Ying Zhang 한국섬유공학회 2018 Fibers and polymers Vol.19 No.6
Enzyme degradation method was adopted to prepare porous m-aramid/cellulose blend membranes with high air permeability, water absorbency and moisture permeability. This facile preparation process started by casting a blend membrane from a DMAc/LiCl solution containing m-aramid and cellulose. An enzyme was then used to degrade the cellulose in the blend membrane, resulting in porous structures. Five enzymes including cellulase, chitosanase, papain, lipase, and glucose oxidase, were evaluated and cellulase was found to be optimal. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to characterize the miscibility and the morphology of the m-aramid/ cellulose blend membranes before and after degradation, respectively. The thermal stability of the blend membranes were characterized by thermogravimetric analysis (TGA). The properties including air permeability, water absorbency and moisture permeability of the m-aramid/cellulose blend membranes greatly improved after degradation as compared to those of the pure m-aramid. This paper provided a new approach to preparing novel textile materials with high comfortability.
Kun Deng,Ping Yin,Xiguang Liu,Qinghua Tang,Rongjun Qu 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
The agricultural residuals buckwheat hulls in the region of Jiaodong, China (BHJC) were employed to adsorb Au(III) ions both in the spiked samples and the gold-plating wastewater samples, and the relevant adsorption kinetics and isotherms were investigated. The investigation on the adsorption selectivity showed that BHJC displayed strong affinity for gold in the aqueous solutions. Furthermore, the process optimization was performed using response surface methodology (RSM), the quantitative relationship between the gold uptake and the different levels of experimental factors was used to work out optimized levels of these parameters.
Fujun Cao,Ping Yin,Jiang Zhang,Hou Chen,Rongjun Qu 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Nanoplates of cobalt phosphonate poly-Co3(LH2)2(LH3)2(H2O)4 2H2O (denoted as poly-CoAedp, L = 1- aminoethylidenediphosphononic acid anion) with two-dimensional structure has been successfully synthesized under hydrothermal conditions and applied in the removal of Pb(II) and Hg(II) ions from aqueous solutions. Poly-CoAedp has exhibited a good performance for heavy metal removal, especially for Pb(II). The effects of different experimental parameters on the competitive adsorption capacities were investigated. The research results suggest that the nanoplates of poly-CoAedp have great potential applications in environmental protection, and the good adsorption ability make it a good promising candidate material for lead removal.