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Chemical characteristics and Pb isotopic compositions of PM2.5 in Nanchang, China

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Particuology 2017年第3期15卷 95-102页

作者： Yang Zhao ruilian yu Gongren Hu Xiaohui Lin Xianrong Liu College of Chemical Engineering Huoqiao University Xiamen 361021 China Environmental Protection Agency of Nanchang City Nanchang 330038 China

In mid-September 2013, PM2.5 samples were collected at six sites in Nanchang, Jiangxi Province, China, to quantify nine water-soluble ions （Ca2＋, Mg2＋, K＋, Na＋, NH4＋, SO42-, Cl-, F , NO3 ）, 29 trace elements （Ba, Zn, Pb, Ni, Mo, Cr, Cu, Sr, Sb, Rb, Cd, Bi, Zr, V, Ga, Li, Y, Nb, W, Cs, Tl, Sc, Co, U, Hf, In, Re, Be, and Ta）, and to characterize Pb isotopic ratios （^207pb/^206pb, ^208pb/^206pb, and ^207pb/^204pb） for identifying the main source（s） of Pb. The results showed that the average daily PM2.5 concentration （53.16 ± 24.17） Dg/m3 was within the secondary level of the Chinese ambient air quality standard. The combined concentrations of SO42-, NH4＋, and NO3- to total measured water-soluble ion concentrations in PM2.5 ranged from 79.40% to 95.18%, indicating that anthropogenic sources were significant. Coal combustion and vehicle emissions were both contributors to PM2.5 based on the NO3-/SO4^2- ratios. Wushu School experienced the lowest concentrations of PM2.s and most trace elements among the six sampling sites. Enrichment factor results showed that TI, Cr, In, Cu, Zn, Pb, Bi, Ni, Sb, and Cd in PM2.5 were affected by anthropogenic activities. Cluster analysis suggested that Cd, Sb, Pb, Re, Zn, Bi, Cs, Tl, Ga, and In were possibly related to coal combustion and vehicle exhaust, while Ni, Nb, Cr, and Mo may have originated from metal smelting. Pb isotopic tracing showed that coal dust, cement dust, road dust and construction dust were the major Pb sources in PM2.5 in Nanchang. Combined, these sources contributed an average of 72.51% of the Pb measured, while vehicle exhaust accounted for 27.49% of Pb based on results from a binary Pb isotope mixed model,

关键词： PMzs Water-soluble ions Trace elements Pb isotopic composition Nanchang

Oxygen isotope and REE geochemistry of metamorphic veins within the Zhoutan Group, central Jiangxi Province

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Chinese Journal Of Geochemistry 2011年第4期30卷 422-429页

作者： HU Gongren LIU Congqiang yu ruilian yu Weihe LIU yue Department of Environmental Science and Engineering Huaqiao University Quanzhou 362021 China Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

Geochemical studies on REE, trace elements and oxygen isotopes from metamorphic veins and their host metasedimentary rocks in the Zhoutan Group at two localities, Xiangshan and Yihuang, in central Jiangxi Province have been conducted in this paper. The results show that the metamorphic quartz veins inherited the REE and oxygen isotope geochemical characteristics from their host rocks, suggesting that the vein-forming fluids were derived from the host rocks. Additionally, fractionation degrees of the trace element pairs Zr-Hf, Nb-Ta, Y-Ho and U-Th in the veins are different from those of their host rocks. It is also indicated that the veins are the products of the fluids. The metamorphic veins within the Zhoutan Group metasedimentary rocks were formed principally as a result of lateral diffusion of the metamorphic fluids.

关键词：稀土元素地球化学变质沉积岩氧同位素周潭群江西中部同位素地球化学特征微量元素化学研究

Heavy metal pollution in intertidal sediments from Quanzhou Bay, China

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Journal of Environmental Sciences 2008年第6期20卷 664-669页

作者： yu ruilian yuAN Xing ZHAO yuanhui HU Gongren TU Xianglin Department of Environmental Science Northeast Normal University Changchun 130024 China Department of Environmental Science and Engineering Huaqiao University Quanzhou 362021 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

The concentrations of eight heavy metals （Cu, Zn, Pb, Cd, Cr, Ni, Hg, and As） in the intertidal surface sediments from Quanzhou Bay were determined to evaluate their levels and spatial distribution due to urbanization and economic development of Quanzhou region, southeast China. The ranges of the measured concentrations in the sediments are as follows： 24.8-119.7 mg/kg for Cu, 105.5-241.9 mg/kg for Zn, 34.3-100. 9 mg/kg for Pb, 0.28-0. 89 mg/kg for Cd, 51.1-121.7 mg/kg for Cr, 16.1-45.7 mg/kg for Ni, 0.17-0.74 mg/kg for Hg, and 17.7-30.2 mg/kg for As. The overall average concentrations of above metals exceed the primary standard criteria but meet the secondary standard criteria of the Chinese National Standard of Marine Sediment Quality. Several contents of Cu and Hg exceed the secondary standard criteria at some stations. The results of geoaccumulation index （Igeo） show that Cd causes strong pollution in most of the study area. There are no significant correlations among most of these heavy metals, indicating they have different anthropogenic and natural sources. Some locations present severe pollution by heavy metals depending on the sources, of which sewage outlets, aquatic breeding, and commercial ports are the main sources of contaminants to the area.

关键词： heavy metal intertidal sediment contamination geoaccumulation index Quanzhou Bay

Distribution,fractionation,and contamination assessment of heavy metals in offshore surface sediments from western Xiamen Bay,China

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Acta Geochimica 2016年第4期35卷 355-367页

作者： Qiuli Yang Gongren Hu ruilian yu Haixing He Chengqi Lin Department of Environmental Science and Engineering Huaqiao UniversityXiamenChina State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of Sciences Guiyang 550002China

Surface sediment samples were collected at 21 offshore sites in western Xiamen Bay, Southeast China. Total concentrations of Li, V, Cr, Co, Ni, Cu, Zn, St, Mn, Pb, Ba, Fe, and Ti were determined by inductively coupled plasma-optical emission spectrometry; Hg was determined by atomic fluorescence spectrometry. A modified BCR sequential extraction procedure was used to extract fractions of the above elements. Concentrations of Pb, Cr, and Hg at most sites met the primary standard criteria of Marine Sediment Quality except site S12 for Pb and S7 for Cr, while concentrations of Zn at 17 sites and Cu at seven sites exceeded the criteria. The mean concentration of Hg was three times higher than the background, with a possible source being the Jiulong River. Fe, Ti, Ba, Co, V, and Li dominated the residual phase, mainly from terrestrial input. Ni, Cr, Pb, and Hg in the non-residual phase varied largely between sites. Sr, Mn, Cu, and Zn were mainly in the non- residual fraction. Most sites showed considerable ecological risk; exceptions were site S7 （very high） and sites S10, S11, and S14 （moderate）. Cu showed moderate-to-high pollution and Pb exhibited no-to-low pollution, while other metals had a non-pollution status according to their ratios of secondary phase to primary phase （RSP）. Results of two assessment methods showed moderate pollution and a very high ecological risk for Cu, Zn, Ni, and Cr at site S7, which might be due to the local sewage treatment plant.

关键词： Heavy metal Fractionation - Assessment Sediments Distribution Western Xiamen Bay

Effective alleviation of Cd stress to microbial communities in mining reclamation soils by thiourea-modified biochar amendment

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Pedosphere 2022年第6期32卷 866-875页

作者： Yanfeng ZHU Jing MA Fu CHEN ruilian yu Gongren HU Yongjun YANG Engineering Research Center of Ministry of Education for Mine Ecological Restoration China University of Mining and TechnologyXuzhou 221008(China) College of Chemical Engineering Huaqiao UniversityXiamen 361021(China) Low Carbon Energy Institute China University of Mining and TechnologyXuzhou 221008(China)

Reclaimed soils in mining area usually display low fertility and present Cd *** amendment of modified biochar effectively fixes Cd in soils,enhances soil fertility,and reduces Cd stress in soil ***,the effect of thiourea-modified biochar(TBC)on microbial adaptability to Cd stress in mining reclamation soils is still *** present work studied the Cd immobilization and microbial community changes in a mining reclamation soil displaying extreme Cd contamination under TBC *** results indicated that the amendment of TBC significantly enhanced(P<0.05)soil pH,the content of available phosphorus(AP),and the activities of urease and polyphenol oxidase by 1.3%,463.4%,54.4%,and 84.0%,respectively,compared to the control without *** amount of toxicity characteristic leaching procedure-extracable Cd decreased(P<0.05)by 68.0%in the TBC-amended soil compared with the unamended *** structure of soil microbiota was reorganized and the alpha diversity index was increased in the TBC *** TBC amendment increased the relative abundances of Proteobacteria,Bacteroidota,and Zoopagomycota,which were strongly associated(P<0.01)with higher soil pH and *** equation model results demonstrated that Cd immobilization was directly influenced by soil pH,AP,and urease,and indirectly affected by bacterial structure in the TBC *** TBC amendment can effectively improve the structural composition of soil bacteria under Cd stress and enhance the pathways of decreasing soil Cd availability as *** results might facilitate the development of in-situ remediation programs in Cd-contaminated soils in the future.

关键词： available phosphorus bacterial structure Cd immobilization enzyme activity toxicity characteristic leaching procedure-extracable Cd

Bioavailability of heavy metals in soil of the Tieguanyin tea garden, southeastern China

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Acta Geochimica 2017年第3期36卷 519-524页

作者： Jingwei Sun ruilian yu Gongren Hu Songhe Jiang yunfeng Zhang Xiaoming Wang College of Chemical Engineering Huaqiao UniversityXiamen 361021 China School of Resources and Environmental Science Quanzhou Normal University Quanzhou 362000 China Analytical Laboratory of Beijing Research Institute of Uranium Geology Beijing 100029 China Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants Putian China

The bioavailability of 22 heavy metals was investigated at 19 sampling sites in Tieguanyin tea garden in Anxi County,Fujian Province,southeastern *** metal concentrations were determined by inductively coupled plasma-mass spectrometry(ICP-MS)and evaluated by geo-accumulation index(I_(geo)).Dilute nitric acid extraction was used to evaluate biological ***,Pb,and Cd were highly bioavailable and most easily absorbed by tea *** metal bioavailability in the surface soil was as the ratio of the effective state to the total *** had the highest I_(geo)values,and the respective samples and sites were classified as moderately/strongly *** element is considered the main factor of heavy metal pollution in the tea garden in *** other heavy metals studied were present in lower concentrations;thus,the samples were classified as uncontaminated or slightly contaminated.

关键词： Geo-accumulation index Tieguanyin tea garden Heavy metals Bioavailability Dilute nitric acid extraction Southeastern China

Characteristics and environmental significance of rare earth elements in PM2.5 of Nanchang, China

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Journal of Rare Earths 2017年第1期35卷 98-106页

作者： ZHAO Yang yu ruilian HU Gongren LIN Xiaohui LIU Xianrong College of Chemical Engineering Huaqiao University Xiamen 361021 China Environmental Protection Agency of Nanchang City Nanchang 330038 China

Concentrations of sixteen rare earth elements（REEs） in PM2.5 and potential-source samples, collected in Nanchang city in mid-September 2013, were determined by inductively coupled plasma mass spectrometry（ICP-MS）. The results showed that the concentrations of total REEs（ΣREE） ranged from 78.76 to 1351 ng/mg. The order of REEs in PM2.5 samples showed the anthropogenic effects, Ce and Eu were affected more than the other REEs according to the enrichment factors. The results of chondrite-normalized REEs patterns and characteristic parameters showed evident light REEs fractionation, and positive anomalies of Ce and Eu in PM2.5. The other non-local pollution sources affected the PM2.5 samples, according to the triangular diagram of La, Ce and Sm compositions and plot of ΣREE vs δEu. Moreover, plot of（La/Sm）N vs（Gd/Yb）N revealed the effects of local sources. In conclusion, the REEs in potential-source samples were close to the background of local soil, while the REEs in PM2.5 samples in Nanchang city were jointly affected by the investigated local sources and other non-local sources.

关键词： PM2.5 rare earth elements composition characteristics distribution pattern enrichment factor

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加碳焙烧膨润土处理活性黑染料废水

非金属矿 2008年第1期31卷 56-58页

作者：于瑞莲华侨大学材料科学与工程学院泉州362021

用加碳焙烧法对膨润土进行活化改性,并用加碳焙烧膨润土处理活性黑染料废水,探讨其去除活性黑染料废水中CODCr和色度的能力。通过实验,确定了最佳活化改性条件:焙烧时间3.5h,加碳量3%,焙烧温度550℃。实验结果表明,加碳焙烧膨润土对活... 详细信息

用加碳焙烧法对膨润土进行活化改性,并用加碳焙烧膨润土处理活性黑染料废水,探讨其去除活性黑染料废水中CODCr和色度的能力。通过实验,确定了最佳活化改性条件:焙烧时间3.5h,加碳量3%,焙烧温度550℃。实验结果表明,加碳焙烧膨润土对活性黑染料废水的处理效果较之原土有较大程度提高,CODCr和色度的去除率分别达到88.2%和96.5%。

关键词：膨润土活性碳焙烧改性活性黑染料废水处理

CTMAB-膨润土预处理垃圾渗滤液的试验研究

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非金属矿 2006年第6期29卷 55-57页

作者：于瑞莲华侨大学环境科学与工程系泉州362021

用十六烷基三甲基溴化铵(CTMAB)改性膨润土,并用制备的有机改性膨润土处理垃圾渗滤液,研究其去除垃圾渗滤液中CODCr和色度的适宜条件。实验结果表明:有机改性膨润土对垃圾渗滤液中CODCr和色度的去除效果有显著提高;在适宜的实验条件下,C... 详细信息

用十六烷基三甲基溴化铵(CTMAB)改性膨润土,并用制备的有机改性膨润土处理垃圾渗滤液,研究其去除垃圾渗滤液中CODCr和色度的适宜条件。实验结果表明:有机改性膨润土对垃圾渗滤液中CODCr和色度的去除效果有显著提高;在适宜的实验条件下,CODCr和色度的去除率可分别达到86.7%和97.7%。本研究结果可为膨润土的改性及其在垃圾渗滤液处理中的应用提供有价值的参考数据。

关键词：膨润土十六烷基三甲基溴化铵有机改性膨润土垃圾渗滤液