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91.
92.
Treatment of taste and odor causing compounds 2-methyl isoborneol and
geosmin in drinking water: A critical review 总被引:2,自引:0,他引:2
Problems due to the taste and odor in drinking water are common in treatment facilities around the world. Taste and odor are
perceived by the public as the primary indicators of the safely and acceptability of drinking water and are mainly caused by the
presence of two semi-volatile compounds – 2-methyl isoborneol (MIB) and geosmin. A review of these two taste and odor causing
compounds in drinking water is presented. The sources for the formation of these compounds in water are discussed alongwith the
health and regulatory implications. The recent developments in the analysis of MIB/geosmin in water which have allowed for rapid
measurements in the nanogram per liter concentrations are also discussed. This review focuses on the relevant treatment alternatives,
that are described in detail with emphasis on their respective advantages and problems associated with their implementation in a fullscale
facility. Conventional treatment processes in water treatment plants, such as coagulation, sedimentation and chlorination have
been found to be ine ective for removal of MIB/geosmin. Studies have shown powdered activated carbon, ozonation and biofiltration
to be e ective in treatment of these two compounds. Although some of these technologies are more e ective and show more promise
than the others, much work remains to be done to optimize these technologies so that they can be retrofitted or installed with minimal
impact on the overall operation and e ectiveness of the treatment system. 相似文献
93.
采用顶空-固相微萃取和色谱质谱联用仪器方法调查严重污染的河流、相关水源中甲硫醚嗅味物质的分布.结果表明,河流中甲硫醚浓度高达2 907 ng/L,受污染的相关水源中甲硫醚浓度达到53 ng/L.单独陶瓷无机膜工艺对DMS去除的效果为20%左右,而臭氧氧化则具有较好的效果,臭氧-陶瓷膜组合工艺对DMS去除率达到50%~9... 相似文献
94.
采用顶空气相色谱质谱(HS/GC-MS)联用技术对污泥恶臭成分进行检测,从污泥恶臭成分中分离多种化合物,并鉴定出烷、醛及苯等有机物。不同地区污泥的性质不尽相同,从而使恶臭成分也产生很大差异。HS/GC-MS法是一种分析污泥恶臭成分的有效方法,为污泥恶臭污染的防治提供了科学依据。 相似文献
95.
臭气浓度无组织排放监测现场采样问题的探讨 总被引:1,自引:0,他引:1
对现有规定中恶臭无组织排放采样部分进行了综合阐述,并对臭气浓度无组织排放采样中涉及的无组织排放的界定、企业工况、采样点位选择、采样频次、气象条件等问题进行探讨,使现场采样更加完善、规范。 相似文献
96.
98.
In this paper, a method using solid-phase extraction (SPE) and gas chromatography-mass spectrometry (GC-MS) was developed to simultaneously analyze five taste and odor compounds in surface water, i.e., 2-methylisoborneol (2-MIB), 2,4,6-trichloroanisole (TCA), 2-isopropyl-3-methoxy pyrazine (IPMP), 2-isobutyl-3-methoxy pyrazine (IBMP), and trans -1,10-dimethyl-trans -9-decalol (geosmin, GSM). The mass spectrometry was operated in selective ion monitoring (SIM) mode. Three kinds of SPE columns and three eluting solvents were compared, the C18 column was chosen as optimum SPE column, and methanol was chosen as the optimum eluting solvent. It was found that the method showed good linearity in the range of 1–200 ng·L-1 and gave detection limits of 0.5–1.5 ng·L-1 for individual compounds. Good recoveries (93.5%–108%) and relative standard deviations (1.58%–7.31%) were also obtained. Additionally, concentrations of these taste and odor compounds in Jinan’s surface and drinking water were analyzed by applying this method, and the results showed that GSM and 2-MIB were the dominant taste and odor compounds in Jinan’s raw water. 相似文献
99.
100.
为研究餐厨垃圾在厌氧消化过程中的恶臭污染物排放特征,采用冷阱富集-GC/MS技术对宁波市某典型餐厨垃圾处置企业的恶臭污染物成分、含量及成分谱进行研究,共检出烷烃、烯烃、芳香烃、卤代烃、含氧有机物、硫化物及氨等7类物质,其中含氧有机物是主要成分。检测结果表明,恶臭污染物总浓度水平为高温灭菌装置油水分离装置厌氧发酵装置分选装置卸料区,高温灭菌装置、分选装置、油水分离装置、厌氧发酵装置的臭气浓度值较高。结合数据分析初步筛选各单元的特征污染物:卸料区、分选装置:乙醇、硫化氢、二甲二硫醚、氨、柠檬烯;高温灭菌和油水分离装置:乙醇、甲硫醇、硫化氢、二甲二硫醚、柠檬烯;厌氧发酵装置:乙醇、硫化氢、二甲二硫醚、对-二乙苯、柠檬烯。 相似文献