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71.
阐述了厦门市同安区工业固体废物的环境管理现状,分析其原因,并就辖区工业固废污染防治工作提出了对策措施。 相似文献
72.
-Phenyl--naphthylamine, a widely used rubber antioxidant and antiozonant, was biotransformed into -naphthylamine, a potent carcinogen, in a laboratory sewage sludge system. -Naphthylamine appeared to accumulate in the aqueous phase of the system while the undegraded parent compound appeared to be associated with the sludge solids. 相似文献
73.
Jones JM Hogrefe C Henry RF Ku JY Sistla G 《Journal of the Air & Waste Management Association (1995)》2005,55(1):13-19
The updated regulatory framework for demonstrating that future 8-hr ozone (O3) design values will be at or below the National Ambient Air Quality Standards (NAAQS) provides guidelines for the development of a State Implementation Plan (SIP) that includes methods based on photochemical modeling and analytical techniques. One of the suggested approaches is the relative reduction factor (RRF) for estimating the efficacy of emission reductions. In this study, the sensitivity of model-predicted responses towards emission reductions to the choice of meteorology and chemical mechanisms was examined. While the different modeling simulations generally were found to be in agreement on whether predicted future-year design values would be above or below the NAAQS for 8-hr O3 at a majority of the monitoring locations in the eastern United States, differences existed for a small percentage of monitors (approximately 6.4%). Another issue investigated was the ability of the attainment demonstration procedure to predict changes in monitored O3 design values. A retrospective analysis was performed by comparing predicted O3 design values from model simulations using emission estimates for 1996 and 2001 with monitored O3 design values for 2001. Results indicated that an average gross error of approximately 5 ppb was present between modeled and observed design values and that, at approximately 27% of all sites, model-predicted and observed design values disagreed as to whether the design value was above or below the NAAQS. Retrospective analyses such as the one presented in this study can provide valuable insights into the strengths and limitations of modeling and analysis techniques used to predict future design values over time periods of a decade or more for the purpose of developing SIPs. Furthermore, such analyses could provide avenues for improvement and added confidence in the use of the RRF approach for addressing attainment of the NAAQS. 相似文献
74.
75.
锑矿区土壤重金属污染及优势植物对重金属的富集特征 总被引:4,自引:0,他引:4
通过野外调查采样,分析了冷水江锑矿区4个采样点土壤和优势植物中重金属含量,以及矿区生长的5种优势植物对Sb、As、Cd、Pb、Cu和Zn的的吸收与富集能力及其富集特性。结果表明,矿区土壤中6种重金属元素的平均含量均超出湖南省土壤背景值和全国土壤背景值,土壤受Sb污染最严重,其次是Cd、As的污染。5种优势植物淡竹叶、苎麻、芒草、狗尾草和白背叶体内Sb、As的含量都超过正常范围,具有修复矿区土壤Sb、As污染的潜力。其中苎麻对Sb的富集系数和转运系数均大于1,满足Sb超富集植物的基本特征,可作为生态恢复的先锋植物;芒草对Cd的富集系数和转运系数都大于1,对重金属有较强的耐性,作为重金属污染的修复植物具有较好的应用前景。 相似文献
76.
Mikula Katarzyna Konieczka Maciej Taf Rafał Skrzypczak Dawid Izydorczyk Grzegorz Moustakas Konstantinos Kułażyński Marek Chojnacka Katarzyna Witek-Krowiak Anna 《Environmental science and pollution research international》2023,30(4):8759-8777
Environmental Science and Pollution Research - The studies presented in this work show that solid tannery waste-like shavings can be used as high-protein materials for fertilizer production... 相似文献
77.
Kamila Kočí Ivana Troppová Miroslava Edelmannová Jakub Starostka Lenka Matějová Jaroslav Lang Martin Reli Helena Drobná Anna Rokicińska Piotr Kuśtrowski Libor Čapek 《Environmental science and pollution research international》2018,25(35):34818-34825
Lanthanum-modified TiO2 photocatalysts (0.2–1.5 wt% La) were investigated in the methanol decomposition in an aqueous solution. The photocatalysts were prepared by the common sol-gel method followed by calcination. The structural (X-ray diffraction, Raman, X-ray photoelectron spectroscopy), textural (N2 physisorption), and optical properties (diffuse reflectance spectroscopy, photoelectrochemical measurements) of all synthetized nanomaterials were correlated with photocatalytic activity. Both pure TiO2 and La-doped TiO2 photocatalysts proved higher yields of hydrogen in comparison to photolysis. The photocatalyst with optimal amount of lanthanum (0.2 wt% La) showed almost two times higher amount of hydrogen produced at the same time as in the presence of pure TiO2. The photocatalytic activity increased with both increasing photocurrent response and decreasing amount of lattice and surface O species. It has been shown that both direct and indirect mechanisms of methanol photocatalytic oxidation participate in the production of hydrogen. Both direct and indirect mechanisms take part in the formation of hydrogen. 相似文献
78.
Beata Doczekalska Krzysztof Kuśmierek Andrzej Świątkowski Monika Bartkowiak 《Journal of environmental science and health. Part. B》2018,53(5):290-297
Adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) and 4-chloro-2-metylphenoxyacetic acid (MCPA) from aqueous solution onto activated carbons derived from various lignocellulosic materials including willow, miscanthus, flax, and hemp shives was investigated. The adsorption kinetic data were analyzed using two kinetic models: the pseudo-first order and pseudo-second order equations. The adsorption kinetics of both herbicides was better represented by the pseudo-second order model. The adsorption isotherms of 2,4-D and MCPA on the activated carbons were analyzed using the Freundlich and Langmuir isotherm models. The equilibrium data followed the Langmuir isotherm. The effect of pH on the adsorption was also studied. The results showed that the activated carbons prepared from the lignocellulosic materials are efficient adsorbents for the removal of 2,4-D and MCPA from aqueous solutions. 相似文献
79.
本文报道了新疆居民饮水中~(234)U、~(235)U和~(238)U比活度.它们的人口加权几何均值和算术均值分别为,~(234)U:113和186mBq/L;~(235)U: 3.0和 5.0mBq/L;~(238)U:65.9和108mBq/L.~(238)U的几何标准偏差为2.79.~(234)U/~(238)U活度比值为1.72.居民由饮水摄入~(234)U和~(238)U所受的有效剂量当量为13.5μSv/a,诱发1348万居民骨癌期望数约为1例/年. 相似文献
80.