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Journal of Environmental Sciences 2012年第6期24卷 979-989页

作者： Huarong Zhao beicheng xia Jianqiao Qin Jiaying Zhang School of Environmental Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China School of Environmental Science and Engineering Guilin University of TechnologyGuilin 541004China Guangdong Provincial Academy of Environmental Science Guangzhou 510045China

Dabaoshan Mine,the largest mine in south China,has been developed since the *** mine drainage （AMD） discharged from the mine has caused severe environmental pollution and human health *** this article,chemical characteristics,mineralogy of ocher precipitations and heavy metal attenuation in the AMD are discussed based on physicochemical analysis,mineral analysis,sequential extraction experiments and *** AMD chemical characteristics were determined from the initial water composition,water-rock interactions and dissolved sulfide minerals in the mine *** waters,affected and unaffected by AMD,were Ca-SO4 and Ca-HCO3 types,*** affected water had a low pH,high SO42 and high heavy metal content and oxidation as determined by the Fe^2＋ /Fe^3＋ *** metal and SO4^2- contents of Hengshi River water decreased,while pH increased,*** was the major mineral at the waste dump,while goethite and quartz were dominant at the tailings dam and *** was transformed into goethite at the tailings dam and *** sulfate ions of the secondary minerals changed from bidentate-to monodentate-complexes ***-Mn oxide phases of Zn,Cd and Pb in sediments increased ***,organic matter complexes of Cu in sediments increased further away from the ***^3＋ mineral precipitates and transformations controlled the AMD water chemistry.

关键词： acid mine drainage Dabaoshan Mine heavy metal attenuation hydrogeochemical PHREEQC

Daily Changes of Spatial Patterns of Meteorological Elements over Pearl River Delta Based on GIS and MM5

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Chinese Geographical Science 2009年第1期19卷 69-76页

作者： JIANG Xueding xia beicheng LIN Guangfa LIN Wenshi School of Environmental Sciences and Engineering SUN Yat-sen University Guangzhou 510275 China

The spatial distribution of meteorological elements is important for understanding the regional meteorology and climate changes. However, previous studies rarely focused on the daily changes of the spatial patterns of meteorological elements due to the limitation of remote sensing （RS） techniques and traditional meteorological methods. In this paper, the regional meteorological elements were simulated by the fifth-generation non-hydrostatic Mesoscale Model （MM5）, and the spatial patterns of meteorological elements and their diurnal variations were analyzed in landscape level over the Pearl （Zhujiang） River Delta （PRD）, China. The results showed that there were several centers of urban heat islands, cold islands, dry islands, wet islands, high wind over the PRD at noon. The diurnal changes of Moran I of meteorological elements were obvious and they reached the extremum at noon and 2-3 hours after the sunrise. The landscape indices of meteorological elements, such as area-weighted mean Fractal Dimension Index （FRAC_AM）, Landscape Shape lndex （LSI）, Shannon＇s Diversity Index （SHDI） and Contagion lndex （CONTAG）, were more variable at about the sunrise, noon and sunset. The occurrence of wave crests and vales of landscape indices was affected by the surface net radiation, turbulence and local circumfluence. The spatial patterns of meteorological elements correlated well with the land surface, thermal exchanges and local circumfluence. A new approach combining GIS, RS and numerical simulations technologies and the landscape ecology method was presented to analyze spatial patterns of meteorological elements, which may be useful for studying global and regional climate changes.

关键词： MM5 GIS/RS landscape ecology meteorological element Pearl (Zhujiang) River Delta

Assessing high resolution oxidation-reduction potential and soluble reactive phosphorus variation across vertical sediments and water layers in Xinghu Lake:A novel laboratory approach

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Journal of Environmental Sciences 2010年第7期22卷 982-990页

作者： Yingzhi Li beicheng xia Jiaying Zhang Chuanhong Li Wenzhuan Zhu School of Environmental Sciences and Engineering Sun Yat-sen University Guangzhou 510275 China Huizhou Institution of Environmental Science Huizhou 516001 China

To understand the transfer process of soluble reactive phosphorus （SRP） on the lake sediment-water interface in a mesotrophic shallow lake in South China, the SRP concentrations and the oxidation-reduction potential （ORP） across the sediment-water interfaces were continually monitored. Sediment samples were collected from Xinghu Lake in Guangdong Province. The ORP dynamics at different layers of overlying water was similar for six experimental systems, whereas those in porewater were significantly different. The ORP in overlying water was 200-300 mV higher than those in sediments. The oxygen penetration depth ranged from 2 to 10 mm in xiannu Lake sediments. The variation amplitudes of ORP increased with sediment depth, but the mean ORP values were all about 218 mV. The SRP concentrations in porewater maintained at a low level of about 0.049 mg/L because of high atom ratio of total iron and total manganese to total phosphorus. The SRP concentrations and variation amplitudes in porewater increased with sediment depth. The SRP in overlying water mainly originated from S RP transference of the porewater of middle and bottom sediments （3-15 cm）. The ORP variation and SRP transfer in porewater played important roles in changing SRP concentrations. A distinct SRP concentration gradient appeared in overlying water when intense exchange occurred at the sediment-water interface; therefore, it was necessary to monitor the SRP concentration profiles to accurately estimate the internal loading.

关键词： sediment-water interface soluble reactive phosphorus oxidation-reduction potential

Removal of Zn2＋ from aqueous solution by biomass of Agaricus bisporus

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Frontiers of Environmental Science & Engineering 2013年第4期7卷 531-538页

作者： Feng XUE beicheng xia Rongrong YING Shili SHEN Peng ZHAO School of Environmental Science and Engineering Sun Yat-Sen University Guangzhou 510275 China Nanjing Institute of Environmental Sciences MEP Nanjing 210042 China

Abstract Biosorption of Zn2＋ from aqueous solutions by biomass of Agaricus bisporus was investigated. The removal rates of Zn2＋ by A. parameters （e.g., solution pH, initial Zn2＋ concentration） were A. bisporus＇s biosorption by bisporus under different bio-sorbent dosage and studied. The inhibition of anionic ligands EDTA （Ethylene Diamine Tetraacetic Acid）, acetate and citrate） implied that EDTA and citrate might be used as eluting reagents. Regular and simultaneous solution pH change and light metal ions release after biosorption indicated that an ion exchange mechanism was involved. From FT-IR （Fourier Transform Infrared） spectroscopy, the main functional groups participated in biosorption were found. Biosorption of Znz＋ byd. bisporus could be well described by the Freundlich and Langmuir models. In conclusion, the biomass of A. bisporus showed high potential for the treatment of wastewater containing Zn2＋.

关键词： biosorption Agaricus bisporus zinc ionexchange FT-1R isotherms

Factors influencing the concentration of negative air ions during the year in forests and urban green spaces of the Dapeng Peninsula in Shenzhen, China

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Journal of Forestry Research 2020年第6期31卷 2537-2547页

作者： Yafei Wang Zhuobiao Ni Di Wu Chen Fan Jiaqi Lu beicheng xia School of Environmental Science and Engineering Sun Yat-sen University135 Xingang Xi RoadGuangzhou 510275People’s Republic of China Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology Sun Yat-sen University135 Xingang Xi RoadGuangzhou 510275People’s Republic of China Shenzhen Degrees of Freedom Environmental Protection Science and Technology Co. Ltd.ShenzhenPeople’s Republic of China

Negative air ions(NAIs)benefit the mental and physical health of humans,but rapid urbanization can decrease the abundance of *** the spatial and seasonal distribution of NAIs and determining the factors that infl uence the concentration during urbanization is thus *** the present study of a typical developing urban district in southern China,negative air ion concentrations(NAICs)in 60 forests sites and 30 urban green spaces were quantifi ed on seven consecutive days in each of the four *** seasonal variations in NAIC were revealed in forests and urban green spaces with trough values in *** progressively decreased from forests to urban green spaces and was infl uenced by local land morphology,vegetation characteristics,and climatic *** vast,heavily vegetated northeastern region was the richest area for NAIs,whereas the narrow central region(urbanized area)was the poorest,implying dramatic impacts of urbanization on the spatial distribution of *** relationship between air temperature and NAIC was better fi tted with a quadratic equation than a linear ***,the NAIC was more sensitive to local morphology in urban green spaces than in urban forests,indicating the vulnerability of NAIs in urbanized ***,the appropriate design of local urban morphology is critical.

关键词： Forests Negative air ion concentration Urban green spaces Shenzhen

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玉米幼苗根际土壤微生物活性对芘污染的响应

生态学报 2010年第5期30卷 1296-1305页

作者：许超夏北成中山大学环境科学与工程学院广州510275 华南农业大学资源与环境学院广州510642

用根际袋法土培试验研究了玉米幼苗根际与非根际土壤微生物量碳、微生物熵、代谢熵和土壤酶活性对不同芘污染水平(50、200、800mg·kg-1,记为T1、T2、T3)的响应差异。结果表明,较低浓度芘可适当的刺激玉米幼苗的生长,而较高浓度芘则抑... 详细信息

用根际袋法土培试验研究了玉米幼苗根际与非根际土壤微生物量碳、微生物熵、代谢熵和土壤酶活性对不同芘污染水平(50、200、800mg·kg-1,记为T1、T2、T3)的响应差异。结果表明,较低浓度芘可适当的刺激玉米幼苗的生长,而较高浓度芘则抑制幼苗生长,其抑制作用随芘处理浓度的提高而增强;芘对玉米根系的影响要大于对茎叶的影响。玉米幼苗能够明显促进土壤中芘的去除。根际和非根际土壤中芘的去除率分别为56.67%-76.18%和32.64%-70.44%,根际土壤中芘的平均去除率比非根际土壤高16.06%。同处理中根际土壤芘含量显著低于非根际土壤,随着芘处理浓度的提高其差异更加显著。根际土壤微生物量碳、微生物熵、多酚氧化酶活性、脱氢酶活性和磷酸酶活性均高于非根际土壤,代谢熵低于非根际土壤,且其差异随芘处理浓度的提高而增大。在不同芘污染水平下,微生物量碳、微生物熵和脱氢酶活性根际和非根际土壤为T1>T2>T3,代谢熵为T3>T2>T1;多酚氧化酶活性根际土壤为T2>T1>T3,非根际土壤为T1>T2>T3;磷酸酶活性根际土壤为T3>T1>T2,非根际土壤为T1>T2>T3。土壤中残余芘含量与土壤微生物量碳、微生物熵、多酚氧化酶、脱氢酶和磷酸酶活性呈显著负相关,与代谢熵呈显著正相关。

关键词：芘根际微生物活性玉米

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土壤多环芳烃污染根际修复研究进展

生态环境 2007年第1期16卷 216-222页

作者：许超夏北成中山大学环境科学与工程学院广东广州510275

多环芳烃(polycyclicaromatichydrocarbons,PAHs)是环境中普遍存在的具有代表性的一类重要持久性有机污染物,具“三致性”、难降解性,在土壤环境中不断积累,严重危害着土壤的生产和生态功能、农产品质量和人类健康。修复土壤多环芳烃污... 详细信息

多环芳烃(polycyclicaromatichydrocarbons,PAHs)是环境中普遍存在的具有代表性的一类重要持久性有机污染物,具“三致性”、难降解性,在土壤环境中不断积累,严重危害着土壤的生产和生态功能、农产品质量和人类健康。修复土壤多环芳烃污染已成为研究的焦点。根际修复是利用植物-微生物和根际环境降解有机污染物的复合生物修复技术,是目前最具潜力的土壤生物修复技术之一。对国内外学者近年来在土壤多环芳烃污染根际修复的效果、根际修复机理和根际修复的影响因素方面的研究进展作了较系统的综述,并分别分析了单作体系、混作体系、多进程根际修复系统和接种植物生长促进菌根际修复系统对土壤多环芳烃的修复效果。指出根际环境对PAHs的修复主要有3种机制:根系直接吸收和代谢PAHs;植物根系释放酶和分泌物去除PAHs,增加根际微生物数量,提高其活性,强化微生物群体降解PAHs。并讨论了影响根际修复PAHs的环境因素如植物、土壤类型、PAHs理化性质、菌根真菌以及表面活性剂等。植物-表面活性剂结合的根际修复技术、PAHs胁迫下根际的动态调节过程、运用分子生物学技术并结合植物根分泌物的特异性筛选高效修复植物以及植物富集的PAHs代谢产物进行跟踪与风险评价将成为未来研究的主流。

关键词：根际多环芳烃(PAHs) 根际修复土壤

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芘对玉米根系分泌氨基酸的影响

生态环境学报 2009年第1期18卷 172-175页

作者：许超夏北成华南农业大学资源与环境学院广东广州510642 中山大学环境科学与工程学院广东广州510275

植物根系释放分泌物是根际修复土壤多环芳烃污染的重要机制之一,但对于多环芳烃污染下根系分泌物的研究很少。以玉米Zeamays L.为供试材料,通过土培培养试验方式研究了在多环芳烃芘处理下,玉米根系分泌氨基酸的变化。结果表明,种植玉米... 详细信息

植物根系释放分泌物是根际修复土壤多环芳烃污染的重要机制之一,但对于多环芳烃污染下根系分泌物的研究很少。以玉米Zeamays L.为供试材料,通过土培培养试验方式研究了在多环芳烃芘处理下,玉米根系分泌氨基酸的变化。结果表明,种植玉米21d后,低质量分数芘(75mg·kg-1)处理和高质量分数芘(600mg·kg-1)处理种植玉米土壤芘的去除率分别为36.0%和28.2%。氨基酸分泌总量随着芘胁迫的加强显著增多,低质量分数芘处理和高质量分数芘处理下氨基酸分泌总量分别是无芘胁迫处理下的1.25倍和5.12倍。不同芘质量分数处理下玉米根系分泌的氨基酸的种类和数量的变化情况不相同。

关键词：玉米芘氨基酸根系分泌物

TCLP法评价酸性矿山废水污染稻田土壤重金属的生态风险

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生态环境 2008年第6期17卷 2264-2266页

作者：许超夏北成华南农业大学资源与环境学院广东广州510642 中山大学环境科学与工程学院广东广州510275

采用美国最新的法定重金属污染评价方法TCLP（Toxicity Characteristic Leaching Procedure，TCLP）法对粤北大宝山矿山下游受酸性矿山废水长期污染的稻田土壤的重金属（Cd、Zn、Pb、Cu）污染状况进行评价，以国际规定的TCLP法标准评价... 详细信息

采用美国最新的法定重金属污染评价方法TCLP（Toxicity Characteristic Leaching Procedure，TCLP）法对粤北大宝山矿山下游受酸性矿山废水长期污染的稻田土壤的重金属（Cd、Zn、Pb、Cu）污染状况进行评价，以国际规定的TCLP法标准评价重金属生态环境风险。结果表明，TCLP试剂提取的土壤重金属Cd、Cu、Pb和Zn含量分别在0．02～0．58、1．42～38．07、0．16-31．01和1．84-75．29mg·kg^-1之间。酸性矿山废水污染稻田土壤不同程度地受到Cd、Cu、Pb、Zn的污染，其中以Pb、Zn污染最为严重，其次为Cu污染，Cd污染程度最轻。

关键词：酸性矿山废水重金属生态环境风险评价 TCLP

运用多隔层根箱研究黑麦草根际微域中芘的降解

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土壤学报 2009年第3期46卷 426-433页

作者：许超夏北成中山大学环境科学与工程学院广州510275 华南农业大学资源与环境学院广州510642

采用多隔层根箱,通过尼龙撩网插片的控制,实现根室土(S0)、离根室0～2 mm(S1)、2～4 mm(S2)、4～6 mm(S3)及>6 mm(S4)各室层土壤的分离采集,测定各室层土壤可提取态芘含量、土壤微生物生物量碳、土壤基础呼吸强度、微生物熵、代谢熵、... 详细信息

采用多隔层根箱,通过尼龙撩网插片的控制,实现根室土(S0)、离根室0～2 mm(S1)、2～4 mm(S2)、4～6 mm(S3)及>6 mm(S4)各室层土壤的分离采集,测定各室层土壤可提取态芘含量、土壤微生物生物量碳、土壤基础呼吸强度、微生物熵、代谢熵、脱氢酶和多酚氧化酶活性。结果表明:种植黑麦草处理的各室层内土壤可提取态芘含量存在显著的不同,可提取态芘含量在各室层的大小顺序为S4>S3>S0>S2>S1;各室层土壤微生物生物量碳、土壤基础呼吸强度、微生物熵、代谢熵、脱氢酶和多酚氧化酶活性表现出与可提取态芘含量变化相反的趋势。未种植黑麦草处理的各室层土壤可提取态芘含量、土壤微生物生物量碳、土壤基础呼吸强度、微生物熵、代谢熵、脱氢酶和多酚氧化酶活性没有差异。种植黑麦草处理各室层土壤可提取态芘含量与土壤微生物生物量碳、土壤基础呼吸强度、微生物熵、代谢熵、脱氢酶活性和多酚氧化酶活性之间均存在显著的负相关性(p<0.05)。主成分分析结果表明种植黑麦草处理土壤微生物活性在各室层间发生了明显的变化。

关键词：根际芘微生物生物量微生物活性酶活性黑麦草