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| 1 | Spectroscopic study on transformations of dissolved organic matter in coal-to-liquids wastewater under integrated chemical oxidation and biological treatment process显示文摘A large amount of wastewater containing various toxic organic contaminants is produced during coal-to-liquids process. In this study, several spectroscopic methods were used to monitor the transformation of organic pollutants during an integrated chemical oxidation and biological process. The results showed that the hydrophobic acid fraction increased after Fenton oxidation, which was likely due to the production of small-molecule organic acids. Soluble microbial products were generated during biological treatment processes,which were degraded after ozonation; meanwhile, the hydrophilic base and acid components increased. Ultraviolet-visible spectroscopic analysis indicated that peaks at the absorption wavelengths of 280 and 254 nm, which are associated with aromatic substances, were detected in the raw water. The aromatic substances were gradually removed, becoming undetectable after biological aeration filter(BAF) treatment. Fourier transform infrared spectroscopy analysis revealed that the functional groups of phenols;benzene, toluene, ethylbenzene, and xylene(BTEX); aromatic hydrocarbons; aliphatic acids;aldehydes; and esters were present in raw wastewater. The organic substances were oxidized into small molecules after Fenton treatment. Aromatic hydrocarbons were effectively removed through bioadsorption and biodegradation after BAF process.Biodegradable organic matter was reduced and finally became undetectable after anoxic–oxic treatment in combination with a membrane bioreactor. Four fluorescent components were fractionated and obtained via excitation–emission matrix parallel factor analysis(EEM-PARAFAC). Dissolved organic matter fractionation in conjunction with EEM-PARAFAC was able to monitor more precisely the evolution of characteristic organic contaminants. | Siwei Peng Xuwen He Hongwei Pan | 2018 | Journal of Environmental Sciences2018，30，8： | 9 |
| 2 | Treatment of mine water high in Fe and Mn by modified manganese sand显示文摘The iron and manganese absorption properties of several filter media were studied. Four plain filter media and six surface-modified media were examined. The surface modification was performed using potassium permanganate as a surface treatment. The surface-modified manganese sand was found to be most efficient at removing iron and manganese from water. The metal concentrations in filtered effluent were between 0.01 and 0.04 mg/L, which is far lower than the standard for recycle water. A concen-tration of 5% KMnO4 was found to be most effective as surface modifier. The surface of the manganese sand modified by 5% KMnO4 was examined and found to be covered with a dense membrane of some compound. The membrane had the advantages of uniform texture, large surface area and physical and chemical stability. It was effective at removing iron and manganese from mine water. | HE Xuwen YANG Huimin HE Yong | 2010 | Mining Science and Technology2010，20，4： | 7 |
| 3 | Catalytic wet air oxidation of phenol with functionalized carbon materials as catalysts:Reaction mechanism and pathway显示文摘The development of highly active carbon material catalysts in catalytic wet air oxidation(CWAO)has attracted a great deal of attention. In this study different carbon material catalysts(multi-walled carbon nanotubes,carbon fibers and graphite) were developed to enhance the CWAO of phenol in aqueous solution. The functionalized carbon materials exhibited excellent catalytic activity in the CWAO of phenol. After 60 min reaction,the removal of phenol was nearly100% over the functionalized multi-walled carbon,while it was only 14% over the purified multi-walled carbon under the same reaction conditions. Carboxylic acid groups introduced on the surface of the functionalized carbon materials play an important role in the catalytic activity in CWAO. They can promote the production of free radicals,which act as strong oxidants in CWAO. Based on the analysis of the intermediates produced in the CWAO reactions,a new reaction pathway for the CWAO of phenol was proposed in this study. There are some differences between the proposed reaction pathway and that reported in the literature. First,maleic acid is transformed directly into malonic acid. Second,acetic acid is oxidized into an unknown intermediate,which is then oxidized into CO2 and H2O. Finally,formic acid and oxalic acid can mutually interconvert when conditions are favorable. | Jianbing Wang Wantao Fu Xuwen He Shaoxia Yang Wanpeng Zhu | 2014 | Journal of Environmental Sciences2014，26，8： | 6 |
| 4 | Treatment of coking wastewater using oxic-anoxic-oxic process followed by coagulation and ozonation显示文摘An oxic-anoxic-oxic(O-A-O)system followed by coagulation and ozonation processes was used to study the treatment of coking wastewater.In the O-A-O process,the removals of NH4+-N,total nitrogen and COD were 91.5-93.3%,91.3-92.6%and 89.1-93.8%,respectively when employing hydraulic residence times of 60 h for the biochemical system.High removal of NH4+-N was obtained due to the placement of an aerobic tank in front of A-O system which can mitigate the inhibitory effect of toxic compounds in coking wastewater on nitrifying bacteria.Addition of methanol into the anoxic reactor greatly increased the removal of total nitrogen,indicating that denitrifiers can hardly use organic compounds in coking wastewater as carbon source for denitrification.COD values of the effluent from the O-A-O system were still higher than 260 mg/L even with a prolonged time of 160 h mainly due to the high refractory properties of residual compounds in the effluent.The subsequent coagulation and ozonation processes resulted in the COD removal of 91.5%-93.3%and reduced the relative abundance of large molecular weight(MW)organics(>1 kDa)from 55.8%to 20.93%with the ozone,PAC and PAM dosages of 100,150 and 4 mg/L respectively.Under these conditions,the COD value and concentration of polycyclic aromatic hydrocarbons in the final effluent were less than 80 and 0.05 mg/L,respectively,which meet the requirement of the Chinese emission standard.These results indicate that the combined technology of O-A-O process,coagulation and ozonation is a reliable way for the treatment of coking wastewater. | Jianbing Wang Yuxian Ji Fengyuan Zhang Dongliang Wang Xuwen He Chunrong Wang | 2019 | Carbon Resources Conversion2019，2，2： | 5 |
| 5 | 显示文摘 | Wang Minxin Zhu Shuquan He Xuwen | 2001 | Journal of China University of Mining & Technology2001，11，2： | 1 |
| 6 | Cadmium adsorption characteristic of alkali modified sewage sludge显示文摘 | Hu Jianlong He Xuwen Wang Chunrong | 2012 | Bioresour Technol2012，121，4： | 1 |
| 7 | Comments on Design Methods of Penstocks 显示文摘 | Hou ]ianguo An Xuwen He Yingming | 2004 | Journal of Pressure Vessel Technology2004，126，3： | 1 |
| 8 | Study on Micro Electrolysis Treatment for Decolorizing Dyed Water显示文摘 | Wang Minxin Zhu Shuquan He Xuwen | 2001 | Jour CUNT2001，11，2： | 1 |
| 9 | Electrochemical treatment of residual ammonia nitrogen in biologically pretreated coking wastewater with three-dimensional electrodes显示文摘 | He Xuwen Liu Li-yuan Wang Hao | 2011 | Water Science&Technology2011，63，11： | 1 |
| 10 | Temporal assembly patterns of microbial communities in three parallel bioreactors treating low-concentration coking wastewater with differing carbon source concentrations显示文摘Carbon source is an important factor of biological treatment systems, the effects of which on their temporal community assembly patterns are not sufficiently understood currently.In this study, the temporal dynamics and driving mechanisms of the communities in three parallel bioreactors for low-concentration coking wastewater(CWW) treatment with differing carbon source concentrations(S0 with no glucose addition, S1 with 200 mg/L glucose addition and S2 with 400 mg/L glucose addition) were comprehensively studied. Highthroughput sequencing and bioinformatics analyses including network analysis and Infer Community Assembly Mechanisms by Phylogenetic bin-based null model(iCAMP) were used. The communities of three systems showed turnover rates of 0.0029~0.0034 every 15days. Network analysis results showed that the S0 network showed higher positive correlation proportion(71.43%) and clustering coefficient(0.33), suggesting that carbon source shortage in S0 promoted interactions and cooperation of microbes. The neutral community model analysis showed that the immigration rate increased from 0.5247 in S0 to 0.6478in S2. The iCAMP analysis results showed that drift(45.89%) and homogeneous selection(31.68%) dominated in driving the assembly of all the investigated microbial communities.The contribution of homogeneous selection increased with the increase of carbon source concentrations, from 27.92% in S0 to 36.08% in S2. The OTUs participating in aerobic respiration and tricarboxylic acid(TCA) cycle were abundant among the bins mainly affected by deterministic processes, while those related to the metabolism of refractory organic pollutants in CWW such as alkanes, benzenes and phenols were abundant in the bins dominated by stochastic processes. | Weijia Li Yu Xia Na Li Jie Chang Jing Liu Pei Wang Xuwen He | 2024 | Journal of Environmental Sciences2024，，3： | 0 |
| 11 | Corrigendum to“Temporal assembly patterns of microbial communities in three parallel bioreactors treating low-concentration coking wastewater with differing carbon source concentrations”[Journal of Environmental Sciences,Volume 137,March 2024,Pages 455-468]显示文摘The authors regret that the first line of Fig.7 has an extra“toluene”.The correct Fig.7 is provided as below. | Weijia Li Yu Xia Na Li Jie Chang Jing Liu Pei Wang Xuwen He | 2024 | Journal of Environmental Sciences2024，，3： | 0 |
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