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| 1 | Characterization of humic acids extracted from the sediments of the various rivers and lakes in China显示文摘The humic acids (HAs) isolated from the sediments of the various rivers,lakes,and reservoirs in China were studied using elemental analyzer,fourier transform infrared (FT-IR),and CP/MAS 13C nuclear magnetic resonance (NMR) spectroscopy.The results showed that the HAs were characterized by some common chemical and physicochemical properties,but they also pose some differences in the C-containing functional groups.The C/N,C/H,O/C,and O/H ratios differ widely for the various HAs,showing that the elemental composition of the HAs from the various sediments was different due to the different environmental conditions.All HAs show similar spectra with different intense absorbance in the region of 4000-2000 cm-1,suggesting that they have very similar structures and functional groups.The absorbance region between 1900 and 400 cm-1 also showed similar spectra with different intense absorbance,different relative intensities,and some relevant differences for the various HAs.The total aromaticities for the six HAs varied from 23.1% to 41.8%.The differences in the elemental composition and functional groups for the various HAs were attributed to their different biogeochemical origins.The HAs in the sediments from Taihu Lake (one freshwater shallow lake with heavy eutrophication),the Pearl River (the tropical river),and the Liao River (located at the joint of the temperate zone and cold-temperate zone) showed different structural properties due to their different geographical and climate zones.These different properties for the six HAs were expected to affect the sorption,distributions,and fates of heavy metals and organic chemicals. | Mengchang HE Chunye LIN | 2008 | Journal of Environmental Sciences2008，20，11： | 35 |
| 2 | Antimony speciation in the environment:Recent advances in understanding the biogeochemical processes and ecological effects显示文摘Antimony(Sb) is a toxic metalloid, and its pollution has become a global environmental problem as a result of its extensive use and corresponding Sb-mining activities. The toxicity and mobility of Sb strongly depend on its chemical speciation. In this review, we summarize the current knowledge on the biogeochemical processes(including emission, distribution,speciation, redox, metabolism and toxicity) that trigger the mobilization and transformation of Sb from pollution sources to the surrounding environment. Natural phenomena such as weathering, biological activity and volcanic activity, together with anthropogenic inputs, are responsible for the emission of Sb into the environment. Sb emitted in the environment can adsorb and undergo redox reactions on organic or inorganic environmental media, thus changing its existing form and exerting toxic effects on the ecosystem. This review is based on a careful and systematic collection of the latest papers during 2010–2017 and our research results, and it illustrates the fate and ecological effects of Sb in the environment. | Mengchang He Ningning Wang Xiaojing Long Chengjun Zhang Congli Ma Qianyun Zhong Aihua Wang Ying Wang Aneesa Pervaiz Jun Shan | 2019 | Journal of Environmental Sciences2019，31，1： | 40 |
| 3 | A review of removal technology for antimony in aqueous solution显示文摘Antimony(Sb)and its compounds,toxic metalloid,have been classified as high-priority pollutants.Increasing Sb released into the water environment by natural processes and anthropogenic activities,which exposure threatens to human health and ecosystems.Therefore,it is of unquestionable importance to remove Sb from polluted water.Keeping in view the extreme importance of this issue,we summarize the source,chemistry,speciation,distribution,toxicity,and polluted situation of Sb about aqueous solution.Then,we provide the recent and common technology to remove Sb,which are based on adsorption,coagulation/flocculation,electrochemical technology,membrane technology,ion exchange,etc.In this review,we focus in detail on the adsorption method,researchers at present have been investigating to discover more advanced,cost-effective,eco-friendly,reusable adsorbents.However,to date the Sb-containing wastewater treatment technologies are not sufficiently developed and most of research have been tested only in controlled lab conditions.Few reports are available that include field studies and applications.We critically analyzed the salient features and removal mechanisms,evaluating benefits and limitations of these technologies,hoping to provide more references for further research.Finally,we considered the Fe-or Mn-based technologies was the most promising technique to remove Sb for field application. | Xiaojing Long Xin Wang Xuejun Guo Mengchang He | 2020 | Journal of Environmental Sciences2020，32，4： | 20 |
| 4 | Effects of temperature and surfactants on naphthalene and phenanthrene sorption by soil显示文摘Adsorption experiments were carried out to investigate the sorption behaviors of naphthalene and phenanthrene in six different soils and to determine the effects of temperature,linear alkylbenzene sulfonate(LAS)and cetylrimethyl ammonium bromide(CTAB)on sorption.The results show that for a given sorbent phenanthrene exhibited greater nonlinear and stronger sorption than naphthalene. There was a strong negative correlation for the Koc values with organic carbon content(foc).The increase of temperature was not favorable to sorption.Sorption decreased along with the increasing aqueous LAS concentration from 0 to 1000 mg/L.At low CTAB concentration(<100 mg/L),the adsorption increased as CTAB hemimicelles formed on the soil surface.At high concentration,CTAB decreased the adsorption by occupying active hydrophobic adsorption sites and solubilization of naphthalene and phenanthrene. | ZHANG Jinghuan ZENG Jianhui HE Mengchang | 2009 | Journal of Environmental Sciences2009，21，5： | 15 |
| 5 | Antimony smelting process generating solid wastes and dust:Characterization and leaching behaviors显示文摘A large amount of solid waste has been produced by the antimony smelting process in the'World Capital of Antimony', Xikuangshan area in China. This study comprehensively investigated the physical and chemical characteristics of the various solid wastes, as well as the leaching behavior of the solid wastes, which included water-quenched slag,arsenic-alkali residue, desulfurized slag and blast furnace dust. These four types of waste were enriched in a variety of heavy metals and metalloids and more specifically with As and Sb levels up to 8.6 × 104 and 3.16 × 105mg/kg, respectively, in arsenic-alkali residue. For desulfurized slag and water-quenched slag, the leaching concentration of Sb significantly exceeded the acceptable limits during the leaching tests using the toxicity characteristic leaching procedure and the synthetic precipitation leaching procedure. In addition, As leaching in arsenic-alkali residue was extraordinarily hazardous, being three orders of magnitude higher than the regulatory level of As. According to the results of the extraction tests, all the tested wastes were classified as hazardous waste. | Xuejun Guo Kunpeng Wang Mengchang He Ziwei Liu Hailin Yang Sisi Li | 2014 | Journal of Environmental Sciences2014，26，7： | 13 |
| 6 | pH-dependent release characteristics of antimony and arsenic from typical antimony-bearing ores显示文摘The pH-dependent leaching of antimony(Sb) and arsenic(As) from three typical Sb-bearing ores(Banxi, Muli and Tongkeng Antimony Mine) in China was assessed using a pH-static leaching experiment. The pH changes of the leached solutions and pH-dependent leaching of Sb and As occurred in different ways. For the Banxi and Muli Sb ores, alkaline conditions were more favorable for the release of Sb compared to neutral and acidic conditions, but the reverse was true for the pH-dependent release of As. For the Tongkeng Sb ore, unlike the previous two Sb-bearing ores, acidic conditions were more favorable for Sb release than neutral and alkaline conditions.The ores with lower Sb and As contents released higher percentages of their Sb and As after 16 day leaching, suggesting that they are the largest potential sources of pollution. This work may provide key information on the geochemistry of Sb and As in the weathering zone. | Xingyun Hu Xuejun Guo Mengchang He Sisi Li | 2016 | Journal of Environmental Sciences2016，28，6： | 12 |
| 7 | Insight into removal of dissolved organic matter in post pharmaceutical wastewater by coagulation-UV/H_2O_2显示文摘The removal of four dissolved organic matter(DOM) fractions, non-acid hydrophobics,hydrophobic acids, hydrophilics and transphilics, was achieved by coagulation-UV/H_2O_2 oxidation in post-pharmaceutical wastewater(PhW W). Coagulation with Polyferric chloride(PFC), Polymeric ferric sulfate(PFS) and Polymeric aluminum ferric chloride(PAFC) was studied separately to evaluate the effects of the initial pH and coagulant dosage. The coagulation-UV/H_2O_2 oxidation method resulted in much higher reduction rates for dissolved organic carbon(DOC)(by 75%) and UV_(254)(by 92%) than coagulation or UV/H_2O_2 oxidation alone. The proportion of non-acid hydrophobics, hydrophobic acids, transphilics and hydrophilics removed by coagulation was 54%, 49%, 27% and 12 %, while the combined treatment removed 92%, 87%,70% and 39%, respectively. Parallel factor analysis(PARAFAC) of fluorescence measurements revealed that the humic-like fluorescent component C4 showed the highest removal(by 44%)during the coagulation stage. After coagulation-UV/H_2O_2 treatment, the humic-like fluorescent component C3 had the highest removal(by 72%), whereas xenobiotic organic fluorescent components C1 and C4 remained recalcitrant to decomposition. Significant correlations(R2> 0.8)between C1 and the hydrophobic acids and non-acid hydrophobics suggested the possibility of using fluorescence spectroscopy as an effective tool to assess variations in DOM fraction treatment efficacy in coagulation-UV/H_2O_2 systems. After the combined treatment, toxic inhibition of cellular activity by post PhW W decreased from 88% to 47% and biodegradability increased from 0.1 to 0.52. | Feng Qian Mengchang He Jieyun Wu Huibing Yu Liang Duan | 2019 | Journal of Environmental Sciences2019，31，2： | 7 |
| 8 | Efect of dissolved organic matter on sorption and desorption of phenanthrene onto black carbon显示文摘Sorption and desorption of phenanthrene(PHE) onto black carbon(BC) extracted from sediments were studied in the presence of three types of dissolved organic matter(DOM), including L-phenylalanine(L-PH), peptone and citric acid. The nonlinearity of the sorption isotherms increased in the presence of DOM. The presence of L-PH reduced the sorption capacity and desorption hysteresis because of the solubilization of PHE in L-PH solution. Peptone at 50–500 mg/L also led to a decrease in sorption attributed to solubilization, although the sorbed peptone on the BC surface could slightly increase PHE sorption. Unlike L-PH and peptone, citric acid enhanced the sorption capacity and irreversibility of PHE on BC mainly due to the strong sorption of citric acid on the BC surface. Our results may help to understand the diferent impacts of DOM on the distribution and transport of PAH in the environment. | Jinghuan Zhang Mengchang He | 2013 | Journal of Environmental Sciences2013，25，12： | 5 |
| 9 | Organic ligand-induced dissolution kinetics of antimony trioxide显示文摘The influence of low-molecular-weight dissolved organic matter(LMWDOM) on the dissolution rate of Sb_2O_3 was investigated. Some representative LMWDOMs with carboxyl, hydroxyl,hydrosulfuryl and amidogen groups occurring naturally in the solution were chosen, namely oxalic acid, citric acid, tartaric acid, EDTA, salicylic acid, phthalandione, glycine, thiolactic acid,xylitol, glucose and catechol. These LMWDOMs were dissolved in inert buffers at pH = 3.7, 6.6and 8.6 and added to powdered Sb_2O_3 in a stirred, thermostatted reactor(25°C). The addition of EDTA, tartaric acid, thiolactic acid, citric acid and oxalic acid solutions at pH 3.7 and catechol at pH 8.6 increased the rate of release of antimony. In the 10 mmol/L thiolactic acid solution, up to 97% by mass of the antimony was released after 120 min reaction. There was no effect on the dissolution of Sb_2O_3 for the other ligands. A weak correlation between dissolution rate with the dissociation constant of ligands and the stability of the dissolved complex was also found. All the results showed that the extent of the promoting effect of ligands on the dissolution of Sb_2O_3 was not determined by the stability of the dissolved complex, but by the dissociation constant of ligands and detachment rate of surface chelates from the mineral surface. This study can not only help in further understanding the effect of individual low-molecular-weight organic ligands, but also provides a reference to deduce the effect of natural organic matters with oxygen-bearing functional groups on the dissolution of antimony oxide minerals. | Xingyun Hu Mengchang He | 2017 | Journal of Environmental Sciences2017，29，6： | 4 |
| 10 | Antimony pollution in China显示文摘 | Mengchang He Xiangqin Wang Fengchang Wu Zhiyou Fu | 2011 | Science of the Total Environment2011，，： | 3 |
| 11 | Comparison of masking agents for antimony speciation analysis using hydride generation atomic fluorescence spectrometry显示文摘为水里的 Sb 的氧化还原作用种形成分析的一个敏感原子度谱的方法被描述。建议方法为察觉用非散的原子荧光 spectrometry 在一个连续流动系统从 Sb (III ) 基于锑的选择产生。Sb (III ) 和 Sb (V) 的荧光紧张上的 HCl 集中的效果被调查。结果显示原子荧光排放能积极地由于 Sb (V) 防碍 Sb (III ) 的决心。为 Sb (III ) 的决心,四混合物作为掩盖代理人从 Sb (V) 禁止锑的产生被测试。掩盖的代理人并且从 Sb (III ) 和 Sb (V) 的荧光信号上的 HCl 的集中的效果被学习。结果显示柠檬性的酸和 NaF 罐头成功地从 Sb (V) 压制氢化物产生。为了评估发达方法论和矩阵,从与不同 Sb (III ) 被刺的自然的水的 Sb (III ) 的恢复和 Sb 的影响,(V) 集中被测试。 | Jianhong XI Mengchang HE Kunpeng WANG Guizhi ZHANG | 2015 | Frontiers of Environmental Science & Engineering2015，9，6： | 2 |
| 12 | Biodegradation of polycyclic aromatic hydrocarbons in sediments from the Daliao River watershed, China显示文摘The Daliao River, as an important water system in Northeast China, was reported to be heavily polluted by polycyclic aromatic hydrocarbons (PAHs). Aerobic biodegradations of four selected PAHs (naphthalene, phenanthrene, uorene and anthracene) alone or in their mixture in river sediments from the Daliao River water systems were studied in microcosm systems. Eects of additional carbon source, inorganic nitrogen and phosphorus, temperature variation on PAHs degradation were also investigated. Results showed that the degradation of phenanthrene in water alone system was faster than that in water-sediment combined system. Degradation of phenanthrene in sediment was enhanced by adding yeast extract and ammonium, but retarded by adding sodium acetate and not significantly inuenced by adding phosphate. Although PAHs could also be biodegraded in sediment under low temperature (5°C), much lower degradation rate was observed. Sediments from the three main streams of the Daliao River water system (the Hun River, the Taizi River and the Daliao River) demonstrated dierent degradation capacities and patterns to four PAHs. Average removal rates (15 or 19 d) of naphthalene, phenanthrene, uorene and anthracene by sediment were in the range of 0.062-0.087, 0.005-0.066, 0.008- 0.016 and 0-0.059 mg/(L·d), respectively. As a result, naphthalene was most easily degraded compound, anthracene was the hardest one. In multiple PAHs systems, the interactions between PAHs inuenced each PAH biodegradation. | QUAN Xiangchun, TANG Qian, HE Mengchang, YANG Zhifeng, LIN Chunye, GUO Wei State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China. | 2009 | Journal of Environmental Sciences2009，21，7： | 2 |
| 13 | Effects of different forms of antimony on the rice during the period of germination and growth and antimony concentration in rice tissue 显示文摘 | He Mengchang Yaag Jurong | 1999 | The Science of the Total Environmerit1999，，： | 1 |
| 14 | Distribution and phytoavailability of antimony at an antimony mining and smelting area, Hunan, China显示文摘 | Mengchang He | 2007 | Environmental Geochemistry and Health2007，，3： | 1 |
| 15 | Study of the seasonal water environmental capacity of the central Shaanxi reach of the Wei River显示文摘 | Wang Tao Zeng Weihua He Mengchang | 2012 | Procedia Environmental Sciences2012，，13： | 1 |
| 16 | Distribution and sources of organochlorine pesticides in water and sediments from Daliao River estuary of Liaodong Bay,Bohai Sea (China)显示文摘 | Li Tan Mengchang He Bin Men | 2009 | Estuarine Coastal and Shelf Science2009，84，： | 1 |
| 17 | Heavy metalpollution of the world largest antimony mine-affected agriculturalsoils in Hunan province ( China) 显示文摘 | WANG Xianqin HE Mengchang XIE Jun | 2010 | Journal of Soils andSediments2010，10，5： | 1 |
| 18 | Antimonypollution in China显示文摘 | HE Mengchang WANG Xianqin WU Fengchang | 2012 | Sci Total Environ2012，42，： | 1 |
| 19 | Distribution,partitioning and sources of polycyclicaromatic hydrocarbons in Daliao River water system indry season,China 显示文摘 | GUO Wei HE Mengchang YANG Zhifeng | 2009 | Journal of Hazardous Materials2009，164，23： | 1 |
| 20 | Characteristics of petroleum hydrocarbons in surficialsediments from the Songhuajiang River(China):spatialand temporal trends 显示文摘 | GUO Wei HE Mengchang YANG Zhifeng | 2011 | Environmental Monitoring and Assessment2011，179，1234： | 1 |
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