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排序方式: 共有362条查询结果,搜索用时 15 毫秒
61.
Ahmed Amani Shawki Ibrahim Dalia Anas Hassan Tarek Hamdy Abd-El-Azem Wael Galal 《Environmental science and pollution research international》2022,29(23):33901-33908
Environmental Science and Pollution Research - Cleaning products are mixtures of many chemical ingredients that are known to contain sensitizers, disinfectants, and fragrances, as well as strong... 相似文献
62.
Leila Hajiaghababaei Babak Ghasemi Alireza Badiei Hassan Goldooz Mohammad Reza Ganjali Ghodsi Mohammadi Ziarani 《环境科学学报(英文版)》2012,24(7):1347-1354
A rapid method for the extraction and monitoring of nanogram level of Pb2+ and Cu2+ ions using uniform silanized mesopor (SBA-15) functionalized with aminobenzenesulfonamide groups and flame atomic absorption spectrometry (FAAS) is presented. Aminobenzenesulfonamide functionalized SBA-15 was synthesized according to procedure in the literature and the presence of organic groups in the silica framework was demonstrated by FT-IR spectra. The functionalized product showed the BET surface area 110 m2/g and pore diameter 5.1 nm, based on adsorption-desorption of N2 at 77 K. The effect of several variables such as (amount of adsorbent, stirring time, pH and presence of other ions in the medium) has been studied. Lead and copper were completely extracted at pH greater than 3 after stirring for 10 min. The maximum capacity of the adsorbent was found to be 191.3 ± 1.4 and 155.0 ± 1.0 μg of lead and copper ions/mg functionalized SBA-15, respectively. The preconcentration factor of the method was found to be 200. The detection limit of the technique was 3.4 and 0.4 ng/mL for Pb2+ and Cu2+, respectively. The applications of this methodology for real samples were examined by various water type, black tea and pepper samples. 相似文献
63.
Safa Sorur Ghaneian Mohammad Taghi Ehrampoush Mohammad Hassan 《Environmental science and pollution research international》2021,28(39):54679-54694
Environmental Science and Pollution Research - The congener polychlorinated biphenyls (PCBs) are one of the of persistent organic pollutant compounds that increase lifestyle-related diseases, such... 相似文献
64.
Zarei Mahsa Taghipour Hassan Hassanzadeh Yousef 《Journal of Material Cycles and Waste Management》2018,20(2):1099-1105
Journal of Material Cycles and Waste Management - Once a tire is removed from a vehicle without the possibility of being remounted for continued on-road use, it is defined as waste and called... 相似文献
65.
Hajabdollahi Hassan Shafiey Dehaj Mohammad 《Environmental science and pollution research international》2021,28(28):37580-37591
Environmental Science and Pollution Research - In this paper, a concept of balance is used to improve the important parameters of the thermal systems. In fact, using this concept give the designer... 相似文献
66.
Abdelbasir Sabah M. Hassan Saad S. M. Kamel Ayman H. El-Nasr Rania Seif 《Environmental science and pollution research international》2018,25(17):16533-16547
Environmental Science and Pollution Research - The increasing use of electrical and electronic equipment leads to a huge generation of electronic waste (e-waste). It is the fastest growing waste... 相似文献
67.
Hassan Nancy Husseiny Yousef Doaa Mohammed Alsemeh Amira Ebrahim 《Environmental science and pollution research international》2023,30(13):36208-36227
Environmental Science and Pollution Research - Aluminum, one of the most abundant metallic elements, is known to be toxic to multiple organs including the kidneys. This study aimed to investigate... 相似文献
68.
A. H. Abu-Hilal A. B. Adam I. M. Banat E. S. Hassan 《Environmental monitoring and assessment》1994,32(1):21-36
A one-year monitoring program was carried out to assess the degree of pollution in three creeks on the northern coast of the United Arab Emirates (UAE), through measuring for chemical nutrients such as phosphate, ammonium, nitrate, nitrite and dissolved oxygen, in addition to enumerating selected microbial communities such as the heterotrophic bacteria, salt tolerant heterotrophic bacteria, Gram-negative bacteria, total coliform and faecal coliform bacteria. The results indicated that Dubai and Sharjah creeks have occasional unusually high nutrients levels with sharp fluctuations and wide spatial and temporal variations, suggesting the presence of an anthropogenic sources of pollution, creating these conditions, near the sampling sites. These sources includes several wastewater outlets and recreational facilities. Ajman creek had much less nutrients levels. The microbial counts in the three creeks had a distinct pattern where numbers peaked in mid spring (May) and autumn (October) and were relatively low during the summer and winter months. Total and faecal coliform fluctuated depending on several factors including the presence of nearby recreation and commercial areas, but were at no time consistently high. It was concluded that there is no major pollution problem in these creeks and recommendation were made to prevent it in the future. 相似文献
69.
70.
Speciation of arsenic and chromium metal ions by reversed phase high performance liquid chromatography 总被引:1,自引:0,他引:1
The speciation of arsenic [As(III) and As(V)] and chromium [Cr(III) and Cr(VI)] was carried out by high performance liquid chromatography. The column used was Econosil C18 (250 x 4.6 mm i.d., particle size 10 microm). The mobile phases consisted of water-acetonitrile (80:20, v/v) for arsenic and 10 mM ammonium acetate buffer (6.0 pH)-acetonitrile (10:90, v/v) for chromium speciation separately and respectively. The detection was carried out by UV-Vis at 410 nm and atomic absorption spectrometer (AAS) respectively and separately. The values of alpha and Rs of As(III) and As(V) species were 1.4 and 1.5 respectively while the values of alpha and Rs for Cr(III) and Cr(VI) were 1.35 and 0.2 respectively. The effect of the acetonitrile percentages was also carried out on the speciation of arsenic only. The relative standard deviation and limit of detection were in the range of 0.01-0.02 and 0.4-1.0 microg/ml respectively. 相似文献