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241.
Elucidation of phosphorous sorption by calcareous soils using principal component analysis 总被引:2,自引:0,他引:2
Kholoud Mashal Yahya S. Al-Degs Mohammed Al-Qinna Mohammed Salahat 《Chemistry and Ecology》2014,30(2):133-146
This study was conducted to understand the mechanisms governing P-sorption and desorption by calcareous soils (up to 48% CaCO 3). Batch experiments with KCl as background were carried out by adding varying amount of P up to 100 mgP.L?1. The desorption percentage (%DES) results show that little P was released from the adsorbed phase. Principal component analysis was applied to evaluate the combined influence of soil components on P sorption. The complex P sorption process can be related to specific soil components by the following equation: P? sorption=?2.20 (CaCO 3% )?0.04 (Fe? oxide)+0.04 (pHe)+11.02 (sand % )+3.35 (silt)?10.73 (clay)?1.24 (EC)?0.22 (OM)?0.81 (CEC)?1.93 (P? Olsen) (R2=0.9941, SSE=380). Sand% and clay% are the most significant variables for modelling P sorption data. The derived equation could be applied to predict P sorption in other soils that have similar compositions to those investigated herein. The degree of P saturation (DPS) threshold level for all soils was less than 3% except in the soil with the lowest iron oxide. All of the studied soils have exceeded the environmentally unacceptable P concentration except the soil with the lowest iron oxide content. 相似文献
242.
Chlorpyrifos is a common organophosphorus insecticide used for crop protection. Chlorpyrifos use has induced heath issues and water pollution. Such issues may be solved by phytoremediation, which is the use of plants for the cleanup of pollutants. Here, we tested Plantago major L. to clean water and soils under laboratory conditions. Results show that the concentration of chlorpyrifos residues after 5 days exposure reached 36.86 μg/g in roots and 13.93 μg/g in upper plant tissues. Gas chromatography–mass spectrometry (GC–MS) analysis of chlorpyrifos metabolites suggests the formation of 3, 5, 6-trichloro-2-pyridinol (TCP) and diethyl 3,5,6-trichloropyridin-2-yl phosphate (chlorpyrifos-oxon). Chlorpyrifos-oxon was detected in the roots and the leaves after 2 h of testing. After 24 h of testing, the degradation product chlorpyrifos-oxon increased in the roots and the leaves then decreased gradually until the end of testing. TCP levels increased gradually to 192 h then decreased until the end of testing. 相似文献
243.
Eiman Al-Abdulghani Amr El-Sammak Mohammed Sarawi 《Journal of Coastal Conservation》2013,17(3):445-462
Kuwait Bay is an imperative characteristic of the State of Kuwait. It has a number of major activities existing around it, including, business, industrial and recreational ones. The phase of construction and development of projects, and their resulting pollution have led to major change in the features of the area. The purpose of this research is to serve as a managing tool for decision-making through the environmental assessment of Kuwait Bay. Due to the multiplicities and diversities of the man-made activities and the natural environmental setting of the bay, the impacts are out looked on a holistic approach rather than on a single approach. The methodology of assessment including, sampling and analysis of water and sediment, statistical analysis, as well as application of the Rapid Impact Assessment Matrix (RAIM) in order to analysis the impacts in an integrated approach. The southern areas of the bay are the main sources of pollution that distributed northward to cover the central region of the bay. Sulaibikhat Bay (South-West sector of the bay) is the most vulnerable area due to its exposure to anthropogenic activities such as reclamations, sewage inflow and other activities. The area near Shuwaikh Port is suffering due to reclamation processes. The northern and north-west sectors suffer from coastal erosion as well as from pollutants arriving via Shatt Al Arab. 相似文献
244.
Marine sponges of the Genus Plakortis are typically unfouled; they can have a distinctive pleasant smell and an oily surface. A significant quantity of fragrant
oil was obtained from a Jamaican Plakortis sp. by cryo-trap. The oil was determined to be exclusively 2-decanone. The antifouling character of the oil was evaluated
by its effects on surface attachment of a gram negative bacterial model using confocal fluorescence microscopy as well as
its effects on the attachment of Dreissena polymorpha (zebra mussel). The ketone dramatically inhibited attachment of the bacteria and zebra mussels. The results suggest that
the oil impacts establishment of related epifauna on the Plakortis sponge in nature. Although the aliphatic ketone alone is not a potential commercial alternative for antifouling coatings,
incorporating the functionality into coating design should be considered in future studies. 相似文献
245.
Wei Tze Mook Mohammed A. Ajeel Mohamed Kheireddine Arou Ma?gorzata Szlachta 《环境科学学报(英文版)》2017,29(4):184-195
In this work a novel anode configuration consisting of an iron mesh double layer is proposed for the electrochemical treatment of wastewater. The removal of Reactive Black 5 dye(RB5) from synthetic contaminated water was used as a model system. At a constant anode surface area, identical process operating parameters and batch process mode, the iron mesh double layer electrode showed better performance compared to the conventional single layer iron mesh. The double layer electrode was characterized by RB5 and chemical oxygen demand(COD) removal efficiency of 98.2% and 97.7%, respectively, kinetic rate constant of 0.0385/min, diffusion coefficient of 4.9 × 10~(-5)cm~2/sec and electrical energy consumption of 20.53 kWh/kgdye removed. In the continuous flow system, the optimum conditions suggested by Response Surface Methodology(RSM) are: initial solution p H of 6.29,current density of 1.6 m A/cm~2, electrolyte dose of 0.15 g/L and flow rate of 11.47 m L/min which resulted in an RB5 removal efficiency of 81.62%. 相似文献
246.
Bello Mustapha Mohammed Raman Abdul Aziz Abdul 《Environmental Chemistry Letters》2019,17(2):1125-1142
Environmental Chemistry Letters - The presence of recalcitrant organic pollutants in water is a major source of concern worldwide. These pollutants are not easily removed using conventional... 相似文献
247.
Antioxidant and antimicrobial activities of phytonutrients as antibiotic substitutes in poultry feed
Seidavi Alireza Tavakoli Masoomeh Asroosh Fariborz Scanes Colin G. Abd El-Hack Mohamed E. Naiel Mohammed A. E. Taha Ayman E. Aleya Lotfi El-Tarabily Khaled A. Swelum Ayman A. 《Environmental science and pollution research international》2022,29(4):5006-5031
Environmental Science and Pollution Research - Globally, there is increasing demand for safe poultry food products free from antibiotic residues. There is thus a need to develop alternatives to... 相似文献
248.
Biomass conversion of agricultural waste residues for different applications: a comprehensive review
Gupta Nitin Mahur Bhupender Kumar Izrayeel Ansari Mohammed Dilsad Ahuja Arihant Rastogi Vibhore Kumar 《Environmental science and pollution research international》2022,29(49):73622-73647
Environmental Science and Pollution Research - Agricultural waste residues (agro-waste) are the source of carbohydrates that generally go in vain or remain unused despite their interesting... 相似文献
249.
Radwan Mohammed K. H. Onn Chiu Chuen Mo Kim Hung Yap Soon Poh Chin Ren Jie Lai Sai Hin 《Environment, Development and Sustainability》2022,24(4):4751-4785
Environment, Development and Sustainability - Coal fly ash and granulated ground blast furnace slag (GGBS) are more widely used as supplementary cementitious materials in cement production. This... 相似文献
250.
Xiong Qinli Xiao Yang Halmy Marwa Waseem A. Pan Kaiwen Dakhil Mohammed A. Zhang Lin Li Ting Liang Pinghan 《Environmental science and pollution research international》2020,27(7):7040-7052
Environmental Science and Pollution Research - Land use/land cover (LULC) changes impact the structure and functioning of ecosystems, which consequently influences the provisioning of a range of... 相似文献