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61.
Liu Xiang-Yu Yang Xu-Feng Li Yun-Xiao Zang Han Zhang Long-Jun 《Environmental science and pollution research international》2019,26(15):15019-15027
Environmental Science and Pollution Research - With rapid development of global wastewater treatment plants (WWTPs), acidification and enhanced CO2 release in receiving waters caused by high-CO2... 相似文献
62.
StudyonthewaterqualityoftheTaihuLakeusinggenotoxicologicalmethodsWuQinglong,ChenKainingNanjingInstituteofGeographyandLimnol... 相似文献
63.
The integration of methanogenesis with denitrification and anaerobic ammonium oxidation in an expaned granular sludge bed reactor 总被引:2,自引:0,他引:2
Dai-Jun Zang 《环境科学学报(英文版)》2003,15(3):423-432
The integration of methanogenesis with denitrification and anaerobic ammonium oxidation (ANAMMOX) was studied in an expanded granular sludge bed (EGSB) reactor in this work. Experimental results from the continuous treatment of wastewater with nitrite and ammonium, which lasted for 107 days, demonstrated that wastewater with high nitrite and ammonium could be anaerobically treated in an expanded granular sludge bed reactor. More than 91% to 97% of COD were removed at up to about 3.9 g COD/(L x d) of COD volumetric loading rate. More than 97% to 100% of nitrite was denitrified at up to about 0.8 g NO2(-) -N/(L x d), which is 16 times higher than that in a conventional activated sludge system with nitrification/denitrification (0.05 gN/(L x d)). No dissimilatory reduction of nitrite to ammonium occurred in the process. However, maximum of about 40% ammonium was found to be lost. Batch tests of 15 days with sludge from the reactor showed that 100% of nitrite was denitrified completely, and about 3% of ammonium was removed when only ammonium (34.3 mg/L) and nitrite (34.3 mg/ L) were added into the sludge suspension medium. Furthermore, about 15% of ammonium amounts were lost with organic COD addition. It suggested that the methanogenesis in the system could enhance ANAMMOX because of intermediate hydrogen produced during methanogenesis. 相似文献
64.
Sönnke Lustig Shuliang Zang Wolfgang Beck Peter Schramel 《Environmental science and pollution research international》1997,4(3):141-145
Platinum emitted by automotive catalyst converters mainly exists in the metallic form, which is not bioavailable. Several
investigations showed that finely dispersed metallic platinum is dissolved in organic matrices to a significantly high degree
[1,2]. In an exclusion experiment, observations were made as to whether the transformation of Pt(0) and other platinum compounds
is mainly of a chemical nature or is influenced by micro-organisms. A previous experiment [2], concerning the interaction
of several platinum compounds with a clay-like humic soil was repeated under sterile conditions to rule out the influence
of micro-organisms. During the time of interaction (3–60 d), no significant differences were observed between the sterile
and non-sterile modes. Thus, the dissolution of metallic platinum into soluble species, observed previously within this time
period [2], seems to be mainly of a chemical nature.
On leave from Liaoning University, Department of Chemistry, 110036 Shenyang, PR China 相似文献
65.
Jing Liu Benjamin R. Bunes Ling Zang Chuanyi Wang 《Environmental Chemistry Letters》2018,16(2):477-505
In recent years, there has been a wide research in supported single-atom catalysts (SACs), which contain only isolated individual metal atoms dispersed on an appropriate support or coordinated with the surface atoms of the support. The SACs exhibit many fascinating characteristics including high activity, selectivity, and maximum atomic utilization. These characteristics arise from the low coordination status, quantum size effect, and the strong metal–support interaction, which have proved to be very powerful in many typical heterogeneous catalysis field including oxidation, hydrogenation, the water–gas shift reaction, methanol steam reforming, electrocatalysis, and photocatalysis. In this review, we summarized the recent progress in synthesis, characterizations, properties, and applications of SACs. 相似文献
66.
Jianwei Liu Peng Yue Nana Zang Chen Lu Xinyue Chen 《Frontiers of Environmental Science & Engineering》2021,15(3):48
67.
模糊控制理论在煤矿通风安全自动化系统中的应用 总被引:9,自引:1,他引:8
由于煤矿通风系统的独特性和复杂性 ,要精确地建立具有时滞及控制对象的数学模型遇到较大的困难 ,因此 ,人们寻求了一些新的解决途径。笔者基于模糊控制理论 ,并提出将其应用于煤矿通风自动化系统中 ,同时采用单片机来实现模糊控制 ,实践证明 ,此法取得良好效果 ;与常规的控制方法相比 ,模糊控制方法具有响应快、控制简单、不需建模等特点 ,适用于矿井通风自动化系统 ;笔者还讨论了调节窗模糊控制系统设计 ,系统的单片机实现及软件编制 ,并进行了实验及实验结果分析 ;最后提出了向自组织方向的深化方案。 相似文献
68.
Wei You Zengliang Zang Lifeng Zhang Yi Li Weiqi Wang 《Environmental science and pollution research international》2016,23(9):8327-8338
Taking advantage of the continuous spatial coverage, satellite-derived aerosol optical depth (AOD) products have been widely used to assess the spatial and temporal characteristics of fine particulate matter (PM2.5) on the ground and their effects on human health. However, the national-scale ground-level PM2.5 estimation is still very limited because the lack of ground PM2.5 measurements to calibrate the model in China. In this study, a national-scale geographically weighted regression (GWR) model was developed to estimate ground-level PM2.5 concentration based on satellite AODs, newly released national-wide hourly PM2.5 concentrations, and meteorological parameters. The results showed good agreements between satellite-retrieved and ground-observed PM2.5 concentration at 943 stations in China. The overall cross-validation (CV) R 2 is 0.76 and root mean squared prediction error (RMSE) is 22.26 μg/m3 for MODIS-derived AOD. The MISR-derived AOD also exhibits comparable performance with a CV R 2 and RMSE are 0.81 and 27.46 μg/m3, respectively. Annual PM2.5 concentrations retrieved either by MODIS or MISR AOD indicated that most of the residential community areas exceeded the new annual Chinese PM2.5 National Standard level 2. These results suggest that this approach is useful for estimating large-scale ground-level PM2.5 distributions especially for the regions without PMs monitoring sites. 相似文献
69.
70.
研究了CuCl2在荷结构负电荷皂土上的吸附性能,考察了pH、无机以及有机添加剂等因素的影响,并结合IR和XRD实验结果探讨了吸附机理。研究表明,皂土对CuCl2有很强的吸附能力,其吸附动力学和吸附等温线分别符合准二级速率方程和Langmuir方程。初始pH增大,吸附量增加。无机以及有机添加剂均能能明显抑制吸附。Cu2+在皂土上的吸附层在微观上可分为因化学键合作用而形成的内络合层和因静电作用而形成的外络合层。 相似文献