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101.
化工厂排放SO2对周围植物的影响 总被引:6,自引:0,他引:6
对某厂区及常年盛行风下风向地区植物受SO2危害情况进行了调查,并测定了部分植物叶片中的硫含量。从植物叶片中的硫含量可间接地判断大气被SO2污染的程度及植物对SO2吸收与抵抗能力的强弱。 相似文献
102.
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104.
北京市通州污灌区土壤环境质量监测和蔬菜重金属污染状况研究 总被引:15,自引:1,他引:15
通过对北京市通州污灌区土壤现状调查与蔬菜重金属污染监测,结合土壤环境质量标准、食品卫生标准及污灌区污染历史,分析对比该区土壤和蔬菜重金属污染状况及其变化。结果表明,本次监测通州污灌区土壤中重金属平均含量均达到土壤环境质量标准(GB15618-1995)中二级标准限量。对照土壤中的重金属Cu、Pb、Cr、Cd和As均达到土壤一级标准。凉水河两岸和通惠北干渠中重金属含量均高于对照土壤,说明污灌区污水灌溉已使土壤受到一定程度的污染。与二十世纪70年代末监测结果相比,土壤中多数重金属含量处于上升趋势。污灌区蔬菜重金属含量监测结果表明,其含量水平均达到食品卫生标准,说明污灌区蔬菜尚未受到严重污染。 相似文献
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106.
通过对昌吉州三工镇和榆树沟镇、米泉市古牧地镇和柏杨河乡种植区土壤、空气质量、灌溉水的监测分析与调查研究,对比清洁区蔬菜基地与污灌区蔬菜基地环境现状,探讨了灌溉用水对蔬菜质量的影响,提出切实可行的防治措施. 相似文献
107.
108.
Urban geochemistry: research strategies to assist risk assessment and remediation of brownfield sites in urban areas 总被引:1,自引:1,他引:0
Thornton I Farago ME Thums CR Parrish RR McGill RA Breward N Fortey NJ Simpson P Young SD Tye AM Crout NM Hough RL Watt J 《Environmental geochemistry and health》2008,30(6):565-576
Urban geochemical maps of Wolverhampton and Nottingham, based on multielement analysis of surface soils, have shown distribution
patterns of “total” metals concentrations relating to past and present industrial and domestic land use and transport systems.
Several methods have been used to estimate the solubility and potential bioavailability of metals, their mineral forms and
potential risks to urban population groups. These include sequential chemical extraction, soil pore water extraction and analysis,
mineralogical analysis by scanning electron microscopy, source apportionment by lead isotope analysis and the development
of models to predict metal uptake by homegrown vegetables to provide an estimate of risk from metal consumption and exposure.
The results from these research strategies have been integrated with a geographical information system (GIS) to provide data
for future land-use planning. 相似文献
109.
Anaerobic co-digestion of kitchen waste and fruit/vegetable waste: Lab-scale and pilot-scale studies
Long Wang Fei Shen Hairong Yuan Dexun Zou Yanping Liu Baoning Zhu Xiujin Li 《Waste management (New York, N.Y.)》2014,34(12):2627-2633
The anaerobic digestion performances of kitchen waste (KW) and fruit/vegetable waste (FVW) were investigated for establishing engineering digestion system. The study was conducted from lab-scale to pilot-scale, including batch, single-phase and two-phase experiments. The lab-scale experimental results showed that the ratio of FVW to KW at 5:8 presented higher methane productivity (0.725 L CH4/g VS), and thereby was recommended. Two-phase digestion appeared to have higher treatment capacity and better buffer ability for high organic loading rate (OLR) (up to 5.0 g (VS) L?1 d?1), compared with the low OLR of 3.5 g (VS) L?1 d?1 for single-phase system. For two-phase digestion, the pilot-scale system showed similar performances to those of lab-scale one, except slightly lower maximum OLR of 4.5 g (VS) L?1 d?1 was allowed. The pilot-scale system proved to be profitable with a net profit of 10.173 $/ton as higher OLR (?3.0 g (VS) L?1 d?1) was used. 相似文献
110.
Érica Castro Ferro Claudia A. L. Cardoso 《Journal of environmental science and health. Part. B》2017,52(10):762-769
This study describes a novel electrochemical method to determine the herbicide trifluralin in samples of water, fruit juice, and vegetable extracts in the presence of surfactants, using a glassy carbon electrode (GCE). In acidic media, trifluralin was irreversible on the glassy carbon electrode surface at ?0.5 V vs. Ag/AgCl. Surfactant presence on the electrode–solution interface modified current intensities and shifted the reduction peak potential of trifluralin. Different types of surfactant and their concentrations were investigated. The anionic surfactant significantly enhanced the peak current intensity of trifluralin. Under optimal analytical conditions, an analytical curve was obtained in the concentration range of 0.48–32.20 µM. The limits of detection and quantification were estimated at 0.031 and 0.104 µM, respectively. The method was successfully applied to quantify trifluralin in samples of water, orange and tomato juice, and green pepper, carrot, and onion extracts, with recovery rates of 97.9–102.1%. The results were in good agreement with those obtained using high-performance liquid chromatography, indicating that the proposed electrochemical method can be employed to quantify trifluralin in various types foods, with sensitivity, specificity, selectivity and reproducibility. 相似文献