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The use of spatial autocorrelation analysis to identify PAHs pollution hotspots at an industrially contaminated site 总被引:4,自引:0,他引:4
Geng Liu Rutian Bi Shijie Wang Fasheng Li Guanlin Guo 《Environmental monitoring and assessment》2013,185(11):9549-9558
The identification of contamination “hotspots” are an important indicator of the degree of contamination in localized areas, which can contribute towards the re-sampling and remedial strategies used in the seriously contaminated areas. Accordingly, 114 surface samples, collected from an industrially contaminated site in northern China, were assessed for 16 polycyclic aromatic hydrocarbons (PAHs) and were analyzed using multivariate statistical and spatial autocorrelation techniques. The results showed that the PCA leads to a reduction in the initial dimension of the dataset to two components, dominated by Chr, Bbf&Bkf, Inp, Daa, Bgp, and Nap were good representations of the 16 original PAHs; Global Moran’s I statistics indicated that the significant autocorrelations were detected and the autocorrelation distances of six indicator PAHs were 750, 850, 1,200, 850, 750, and 1,200 m, respectively; there were visible high–high values (hotspots) clustered in the mid-bottom part of the site through the Local Moran’s I index analysis. Hotspot identification and spatial distribution results can play a key role in contaminated site investigation and management. 相似文献
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生态文明是人类文明发展的必由之路.继承和创新中国传统文化固有的生态文明观,注重树立生态文明的新理念,要坚持以科学发展观为指导,以奥运为契机,建立绿色生态消费观,更要从审美的视角开展生态美育教育. 相似文献
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微生物对煤矿固体废弃物的脱硫效应 总被引:2,自引:0,他引:2
煤矸石是煤矿特有的一种固体废弃物,应用本实验室筛选出的氧化亚铁硫杆菌Thiobacillus ferrooxidans和嗜酸氧化硫硫杆菌Thiobacillus thiooxidans对宁夏大武口高硫煤矸石进行微生物脱硫技术及应用条件的研究,如不同煤矸石粒径、不同接种浓度和不同煤矸石浓度。2种脱硫细菌对煤矸石的脱硫效果显著,小粒径煤矸石的微生物脱硫效果更好。考虑脱硫成本及脱硫效率,Thiobacillus ferrooxidans菌最佳的接种浓度为25%,在Thiobacillus Thiobacillus thiooxidans菌悬液中,能脱出最大量硫酸根的煤矸石最佳比例是10%。2种菌混合较单菌株脱硫效果更好,以Thiobacillus ferrooxidans∶Thiobacillus thiooxidans=2∶3的比例混合后对煤矸石的脱硫效果最佳,该结果为煤矿废弃物煤矸石的污染防治提供技术依据。 相似文献
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Environmental mercury contamination of an artisanal zinc smelting area in Weining County, Guizhou, China 总被引:3,自引:0,他引:3
Li G Feng X Qiu G Bi X Li Z Zhang C Wang D Shang L Guo Y 《Environmental pollution (Barking, Essex : 1987)》2008,154(1):21-31
To investigate the extent of Hg contamination due to artisanal Zn smelting activities in Weining County, northwestern Guizhou, China, total Hg and methyl mercury (MeHg) concentrations in soil and surface water were determined. Samples of corn plants growing in the study area were also collected for total Hg analysis. A high geometric mean Hg emission factor of 75gHgt(-1)Zn was estimated and significantly elevated total gaseous mercury (TGM) concentrations were found in the atmosphere adjacent to the Zn smelting sites, ranging from 30 to 3814ngm(-3). Total Hg and MeHg concentrations in topsoil samples ranged from 62 to 355microgkg(-1) and from 0.20 to 1.1microgkg(-1), respectively. Total Hg Concentrations in corn plant tissues increased in the order of grains相似文献
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Numerous reports have indicated that hydrophobic organic compound bioaccessibility in sediment and soil can be determined by extraction using aqueous hydroxypropyl-β-cyclodextrin (HPCD) solutions. This study establishes the compatibility of HPCD with Selenastrum capricornutum and assesses whether its presence influences the toxicity of reference toxicants. Algal growth inhibition (72 h) showed no significant (P > 0.05) difference at HPCD concentrations up to and including 20 mM. HPCD presence did not influence the toxicity of the inorganic reference toxicant (ZnSO4), with IC50 values of 0.82 μM and 0.85 μM, in the presence and absence of HPCD (20 mM), respectively. However, HPCD presence (20 mM) reduced the toxicity of 2,4-dichlorophenol and the herbicides diuron and isoproturon. These reductions were attributed to inclusion complex formation between the toxicants and the HPCD cavity. Liberation of complexed toxicants, by sample manipulation prior to toxicity assessment, is proposed to provide a sensitive, high throughput, bioassay that reflects compound bioaccessibility. 相似文献
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Liang Xuedong Lin Shifeng Bi Xueyao Lu Enfan Li Zhi 《Environmental science and pollution research international》2021,28(13):15838-15852
Environmental Science and Pollution Research - As the construction industry generates more than 30% of global greenhouse gases and more than 40% of global urban waste every year, energy... 相似文献