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81.
Genc E Sangun MK Dural M Can MF Altunhan C 《Environmental monitoring and assessment》2008,141(1-3):59-65
The European eel’s swimbladder nematode, Anguillicola crassus, sampled from the Asi River (Orontes River) in Antakya (Hatay, Turkey) in May 2006 were analysed by Inductively Coupled Plasma-Atomic
Emission Spectrometry (ICP-AES) for their some heavy metal (Cd, Cr, Cu, Fe, Hg, Mn, Pb and Zn) levels. The metal concentrations
of the parasites were compared to different organs (swimbladder, liver, muscle and skin) of the fish hosts. The parasite contained
statistically highly significantly amounts of Fe (P < 0.05). The iron level of nematode was up to 25.52 times than the muscle of its host, Anguilla anguilla. However, bioconcentration of Cd, Cr, Cu, Hg, Mn, Pb, Zn were detected in the A. crassus and it contained no statistically differences with the other tissues of its host, the eel (P > 0.05). Furthermore, no significant differences were detected in the heavy metal accumulations between the parasitized and
un-parasitized fish tissues. The analysed metals (Cd, Cr, Cu, Fe, Mn, Pb and Zn) were found in fish muscle at mean concentrations
under the permissible limits proposed by FAO. 相似文献
82.
Ghanbari F Amin Sharee F Monavari M Zaredar N 《Environmental monitoring and assessment》2012,184(3):1221-1230
Regarding various types of pollutant, waste management requires high attention. Environmental site selection study, prior
to landfill operation, and subsequently, monitoring and maintaining of the location, are of foremost points in landfill site
selection process. By means of these studies, it is possible to control the undesirable impacts caused by landfills. Study
ahead aims at examination of effectiveness of a new method called Monavari 95–2 in landfill site assessment. For this purpose,
two landfills Rasht and Andisheh, which are, respectively, located on humid and arid areas, were selected as case studies.
Then, the results obtained from both sites were compared with each other to find out the weaknesses and strengths of each
site. Compared with others similar methods, much more criteria (53 parameters) can be considered within this method, so the
results will be more calculable. According to this method, Rasht landfill (site H) is classified as unacceptable landfill
site i.e. there is an urgent need for a new suitable site for landfill, while Andishe Landfill (site D) is ranked as acceptable
landfill site but needs environmental management program to handle the existing weaknesses. 相似文献
83.
Amin U. Khan 《Environmental monitoring and assessment》2010,163(1-4):171-184
This paper summarizes the findings obtained in a monitoring study to understand the sources and processes affecting the quality of shallow and deep groundwater near central air conditioning plant site in Trombay region by making use of physicochemical and biological analyses. All the measured parameters of the groundwaters indicate that the groundwater quality is good and within permissible limits set by (Indian Bureau of Standards 1990). Shallow groundwater is dominantly of Na–HCO3 type whereas deep groundwater is of Ca–Mg–HCO3 type. The groundwater chemistry is mainly influenced by dissolution of minerals and base exchange processes. High total dissolved solids in shallow groundwater compared to deeper ones indicate faster circulation of groundwater in deep zone preferably through fissures and fractures whereas groundwater flow is sluggish in shallow zone. The characteristic ionic ratio values and absence of bromide point to the fact that seawater has no influence on groundwater system. 相似文献
84.
Ghufran Redzwan Maridah Mohd Amin Nur Nabiha Zulkarnain Mohd Radzi Abu Mansor Mohamad Suffian Mohamad Annuar Zul Ilham 《Journal of Material Cycles and Waste Management》2017,19(2):676-681
Biodiesel is commonly produced from vegetable oils, mostly edible and more expensive than petroleum diesel. By considering the cost of the conversion processes, cheap feedstock such as triglycerides and fatty acids (FA) extracted from early stage of food waste liquefaction has become a better choice than vegetable oils, as it could provide high yield of biodiesel without any compromise to food supply and other resources. In this study, FA from early stage of food waste liquefaction was extracted and tested for use as feedstock for biodiesel synthesis. The raw material was not pretreated but extraction was done by dry and wet methods. It was found that wet method could minimized the lost of short and medium-chained FA as well as reducing the number of steps required, thus, yielding higher amount of FA as feedstock. The effects of mixing, methanol ratio, reaction time and catalyst content were investigated for the acid-catalyzed esterification. The maximum biodiesel conversion obtained was 97.4 %. 相似文献
85.
Fazrul Razman Sulaiman Mohammad Syahirul Aiman Jusoh Amirul Amin Nasaruddin Noorzamzarina Sulaiman 《环境质量管理》2023,33(1):71-78
Heavy metals in suburban soils pose both indirect and direct health risks. This study assessed the concentrations of Cr, Zn, Pb, and Cd in Jengka (Malaysia) suburban soil and estimated the human health risk. Health risk assessment (HRA) was utilized to assess non-cancer and cancer risks. The concentrations of heavy metals increased in the following order: Cd < Zn < Cr < Pb. The heavy metals were found to be divided into two components using principal component analysis (PCA), with PC1 comprising Pb and Cd and PC2 containing Zn and Cr. PC1 originates from anthropogenic sources, while PC2 is often from mixed anthropogenic and natural sources. Despite having the lowest mean concentration, Cd was enriched based on the geo-accumulation index (Igeo) and enrichment factor (EF). Average hazard index values were below the acceptable threshold (HI < 1) for dermal and inhalation pathways suggesting a low non-cancer risk. Jengka suburban soil had total lifetime cancer risk values slightly higher than the acceptable threshold (1 × 10−5). Skin contact was the most prominent contributing exposure pathway for both non-carcinogenic and carcinogenic risks. This study suggests that heavy metal bioactivity levels be used to make a plausible HRA of heavy metal pollution in suburban soils. 相似文献
86.
Hussain Sajjad Mubeen Muhammad Ahmad Ashfaq Akram Waseem Hammad Hafiz Mohkum Ali Mazhar Masood Nasir Amin Asad Farid Hafiz Umar Sultana Syeda Refat Fahad Shah Wang Depeng Nasim Wajid 《Environmental science and pollution research international》2020,27(32):39676-39692
Environmental Science and Pollution Research - Land use/land cover (LULC) change has serious implications for environment as LULC is directly related to land degradation over a period of time and... 相似文献
87.
Nimra Amin Fazal-ur- Rehman Shahid Adeel Tanvir Ahamd Majid Muneer Aminoddin Haji 《Environmental science and pollution research international》2020,27(7):6851-6860
Natural colors particularly animal-based colorants are employed in the field of cosmetics, food, and flavors and also gaining popularity in textiles, due to their soothing nature. In this study, the microwave-assisted extraction of colorant from cochineal insects for dyeing of bio-mordanted silk has been carried out. Acidic, methanolic, and acidified methanol solubilized media were used to extract the natural colorant from cochineal under microwave irradiation for 1–6 min. Bio-mordants have been employed at optimized conditions to make the process greener and sustainable. It is found that acid solubilized extract of pH 4, employed at 55 °C for 55 min containing 5 g/100 mL of Glauber’s salt as exhausting agent has given high color strength onto microwave-treated silk fabric. Suggested ISO standards for colorfastness have revealed that bio-mordants have given excellent color depth and excellent rating of fastness properties, compared with chemical mordants used. It is found that microwave treatment has not only improved the dyeing behavior of colorant extracted from cochineal in acid solubilized medium but also enhanced the color characteristics onto bio-mordanted silk fabric. 相似文献
88.
建立了逆反射光场的数学模型,采用整场扫描的方法对逆向反射镜的反射光场进行光度测量,增加了测量信息量,并提出新的评价参数过反光矩RR。 相似文献
89.
Azhar Abbas Muhammad Ajaz Hussain Muhammad Amin Muhammad Sher Muhammad Nawaz Tahir Wolfgang Tremel 《环境科学学报(英文版)》2015,37(11):51-58
Chemically modified pullulan was evaluated for its sorption efficiency and selectivity to remove cadmium(Cd) from spiked high-hardness groundwater(GW). Pullulan esterified with succinic anhydride using dimethylaminopyridine showed a fairly high degree of substitution value as confirmed by1 H NMR spectroscopy. Pullulan succinate(Pull-Suc) was converted into the sodium salt(Pull-Suc-Na). The effect of contact time(5–200 min) and p H(2–8) on Cd-uptake by the sorbent(Pull-Suc-Na) was investigated. The sorbent showed more than 90% Cd-removal in first 15 min from distilled water(DW) and GW solution,respectively. Comparison of Pull-Suc-Na with other polysaccharidal sorbents suggested its high efficiency(DW 476.2 mg/g and GW 454.5 mg/g) and selectivity for the removal of Cd by an ion exchange mechanism, which is further supported by the negative Gibbs free energy values calculated from Langmuir isotherms. A Langmuir isotherm kinetic model provided the best fit for the sorption of Cd using Pull-Suc-Na. The sorbent showed a negligible decrease in Cd-uptake over three regeneration cycles. The thermal stability testing of the sorbents indicated that Pull-Suc-Na(sorbent) is more stable than Pull-Suc. 相似文献
90.
Transfer factors of Polonium from soil to parsley and mint 总被引:1,自引:0,他引:1
Transfer factors of 210Po from soil to parsley and mint have been determined. Artificial polonium isotope (208Po) was used as a tracer to determine transfer factor of Po from soil to plant in pot experiments. Two plant growing systems were used for this study namely, an outdoor system and a sheltered system by a polyethylene tent. 208Po and 210Po were determined in soil and different parts of the studied plants (stem and leaf), using alpha spectroscopy. The results have shown that there was a clear uptake of 208Po by roots to leaves and stems of both plants. Higher values of transfer factors using the 210Po activity concentrations than the 208Po activity concentration were observed. Transfer factors of 210Po from soil to parsley varied between 20 × 10−2 and 50 × 10−2 and 22 × 10−3 and 67 × 10−3 in mint, while 208Po transfer factors varied between 4 × 10−2 and 12 × 10−2 for parsley and 10 × 10−2 and 22 × 10−2 in mint. Transfer factors of Po were higher in those plants grown in the sheltered system than in the open system; about 75% of Po was transferred from atmosphere to parsley parts using the two systems. Ratios of transferred Po from soil to mint stem and leaf in the sheltered system were higher by 2 times from those in the open system. 相似文献