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RISS 인기검색어
- 검색키워드
- 저자 : Xianghua Feng (검색결과 6 건)
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Feng, Xianghua,Ding, Shimin,Xie, Faping Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.11
Photochemical degradation of dimethyl phthalate (DMP) in Fe(III)/tartrate/$H_2O_2$ system was investigated utilizing fluorescent lamps as the primary light source. Effects of initial pH, light source, and initial concentration of each reactant on DMP photodegradation was examined. The results show that the system was able to effectively photodegrade DMP utilizing visible light. Fluorescent lamp, halide lamp, UV lamp and sunlight could all be used as the light sources. The optimal pH ranged among 3.0-4.0 for the system. Increases of the initial concentrations of Fe(III) and $H_2O_2$ accelerated the photodegradation of DMP, whereas excessively high initial tartrate concentration resulted in the decrease of photodegradation efficiency and rate of DMP.
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Photocatalytic Reduction of Hexavalent Chromium Induced by Photolysis of Ferric/tartrate Complex
Feng, Xianghua,Ding, Shimin,Zhang, Lixian Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.11
Photocatalytic reduction of hexavalent chromium (Cr(VI)) in ferric-tartrate system under irradiation of visible light was investigated. Effects of light resources, initial pH value and initial concentration of various reactants on Cr(VI) photocatalytic reduction were studied. Photoreaction kinetics was discussed and a possible photochemical pathway was proposed. The results indicate that Fe(III)-tartrate system is able to rapidly and effectively photocatalytically reduce Cr(VI) utilizing visible light. Initial pH variations resulte in the concentration changes of Fe(III)-tartrate complex in this system, and pH at 3.0 is optimal for Cr(VI) photocatalytic reduction. Efficiency of Cr(VI) photocatalytic reduction increases with increasing initial concentrations of Cr(VI), Fe(III) and tartrate. Kinetics analysis indicates that initial Fe(III) concentration affects Cr(VI) photoreduction most significantly.
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Photochemical Degradation of Dimethyl Phthalate by Fe(III)/tartrate/H2O2 System
Xianghua Feng,Shimin Ding,Faping Xie 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.11
Photochemical degradation of dimethyl phthalate (DMP) in Fe(III)/tartrate/H2O2 system was investigated utilizing fluorescent lamps as the primary light source. Effects of initial pH, light source, and initial concentration of each reactant on DMP photodegradation was examined. The results show that the system was able to effectively photodegrade DMP utilizing visible light. Fluorescent lamp, halide lamp, UV lamp and sunlight could all be used as the light sources. The optimal pH ranged among 3.0-4.0 for the system. Increases of the initial concentrations of Fe(III) and H2O2 accelerated the photodegradation of DMP, whereas excessively high initial tartrate concentration resulted in the decrease of photodegradation efficiency and rate of DMP.
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Photocatalytic Reduction of Hexavalent Chromium Induced by Photolysis of Ferric/tartrate Complex
Xianghua Feng,Shimin Ding,Lixian Zhang 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.11
Photocatalytic reduction of hexavalent chromium (Cr(VI)) in ferric-tartrate system under irradiation of visible light was investigated. Effects of light resources, initial pH value and initial concentration of various reactants on Cr(VI) photocatalytic reduction were studied. Photoreaction kinetics was discussed and a possible photochemical pathway was proposed. The results indicate that Fe(III)-tartrate system is able to rapidly and effectively photocatalytically reduce Cr(VI) utilizing visible light. Initial pH variations resulte in the concentration changes of Fe(III)-tartrate complex in this system, and pH at 3.0 is optimal for Cr(VI) photocatalytic reduction. Efficiency of Cr(VI) photocatalytic reduction increases with increasing initial concentrations of Cr(VI), Fe(III) and tartrate. Kinetics analysis indicates that initial Fe(III) concentration affects Cr(VI) photoreduction most significantly.
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Does Price matter for online word-of-mouth value---evidence from online restaurants' reviews
Xianghua Lu,Yue Feng 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
The value of online world-of-month (WOM) is well recognized but far from being fully explored. This paper examines the value of WOM on service oriented product sales by using volume, valence and negative percentage of online review as measurements. Mean while, this paper proposes that price has a moderate effect on WOM value realization, Empirical finding of this study, which is based in the restaurants’ reviews data from Dianping.com, the biggest restaurant review website in China, verifies significant impacts of volume, valence and negative percentage of online review on product sales, and supports the hypotheses that product price has a moderate effect on WOM value.
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Effects of Montmorillonite Nanocomposite on Mercury Residues in Growing/Finishing Pigs
Lin, Xianglin,Xu, Zirong,Zou, Xiaoting,Wang, Feng,Yan, Xianghua,Jiang, Junfang Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.10
The study was conducted to evaluate the effects of montmorillonite anocomposite (MNC) on mercury residues in growing/finishing pigs. A total of 96 cross bred pigs ($Duroc{\times}Landrace{\times}large$ white, 48 barrows and gilts respectively), with similar initial weight (27.87${\pm}$1.15 kg), were used in this study. The animals were randomly assigned to two concentrations of mercury (0.1 and 0.3 ppm from $HgCl_2$) and two levels (0 and 0.3%) of MNC in a $2{\times}2$factorial arrangement of treatments. Each group has 3 pens (replications), and each pen has 8 pigs (4 barrows and 4 gilts). The experiment lasted for 90 days. The results showed that pig growth performances were not affected significantly by inclusion of Hg and addition of MNC (p$\geq$0.05). It indicated that the extent of intoxication in these pigs were not severe enough to impair growth performances. Both on the bases of 0.1 ppm and 0.3 ppm mercury supplementations, addition of 0.3% MNC markedly decreased mercury levels of blood, muscle, kidney and liver tissue (p<0.05). These results implied that the addition of non-nutritive sorptive material, MNC, could effectively reduce the gastrointestinal absorption of mercury via its specific adsorption, with a consequent reduction of mercury residues in body tissues. MNC had offered an encouraging solution to produce safe animal products with mercury contaminated feed.
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