排序方式: 共有86条查询结果,搜索用时 15 毫秒
21.
Bernd Markert Edita Baltrėnaitė Ewa Chudzińska Silvia De Marco Jean Diatta Zahra Ghaffari Svetlana Gorelova Jorge Marcovecchio Guntis Tabors Meie Wang Naglaa Yousef Stefan Fraenzle Simone Wuenschmann 《Environmental science and pollution research international》2014,21(8):5450-5456
Living or formerly living organisms are being used to obtain information on the quality of the general health status of our environment by bioindication and biomonitoring methods for many decades. Thus, different roads toward this common scientific goal were developed by a lot of different international research groups. Global cooperation in between various scientific teams throughout the world has produced common ideas, scientific definitions, and highly innovative results of this extremely attractive working field. The transdisciplinary approach of different and multifaceted scientific areas—starting from biology, analytical chemistry, via health physics, up to social and economic issues—have surpassed mental barriers of individual scientists, so that “production” of straightforward common results related to the influence of material and immaterial environmental factors to the well-being of organisms and human life has now reached the forefront of international thinking. For the further sustainable development of our common scientific “hobby” of bioindication and biomonitoring, highest personal energy has to be given by us, being teachers to our students and to convince strategically decision makers as politicians to invest (financially) into the development of education and research of this innovative technique. Young people have to be intensively convinced on the “meaning” of our scientific doing, e.g., by extended forms of education. One example of multilingual education of students on a global scale and perspective is given here, which we started about 3 years ago. 相似文献
22.
Fatemeh Sabermahani Zahra Hassani Mahboobeh Faramarzpoor 《Environmental monitoring and assessment》2013,185(6):4969-4976
The aim of the present work is the assessment of a new sorbent, prepared using silica gel coated with a pyrimidine derivative (allyl 6-methyl-4-phenyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate), for extraction and preconcentration trace amount of lead from different samples prior to determination by flame atomic absorption spectrometry. Common coexisting ions did not interfere with the separation and determination of lead at pH?6, so that lead ion completely adsorbed on the column. The limit of detection based on three times the standard deviation of the blank was found to be 0.53 ng?mL?1 in original solution. Obtained sorption capacity for 1 g sorbent was 5.0 mg Pb. The linearity was maintained in the concentration range of 0.1–30.0 ng?mL?1 for the concentrated solution. Eight replicate determinations of 2.0 μg?mL?1 of lead in the final solution gave relative standard deviation of ±2.6 %. The proposed method was successfully applied to the determination trace amounts of lead in the environmental samples such as carrot, rice, zardchoobe, and real water samples. 相似文献
23.
24.
A new strategy for determination of hydroxylamine and phenol in water and waste water samples using modified nanosensor 总被引:2,自引:0,他引:2
Roya Sadeghi Hassan Karimi-Maleh Mohammad A. Khalilzadeh Hadi Beitollahi Zahra Ranjbarha Mohammad Bagher Pasha Zanousi 《Environmental science and pollution research international》2013,20(9):6584-6593
A carbon paste electrode modified with p-chloranil and carbon nanotubes was used for the sensitive and selective voltammetric determination of hydroxylamine (HX) and phenol (PL). The oxidation of HX at the modified electrode was investigated by cyclic voltammetry (CV), chronoamperommetry, and electrochemical impedance spectroscopy. The values of the catalytic rate constant (k), and diffusion coefficient (D) for HX were calculated. Square wave voltammetric peaks current of HX and PL increased linearly with their concentrations at the ranges of 0.1–172.0 and 5.0–512.0 μmol L?1, respectively. The detection limits for HX and PL were 0.08 and 2.0 μmol L?1, respectively. The separation of the anodic peak potentials of HX and PL reached to 0.65 V, using square wave voltammetry. The proposed sensor was successfully applied for the determination of HX and PL in water and wastewater samples. 相似文献
25.
26.
Abdolreza Ayoubi Najafabadi Gholamreza Askari Mahammad Mousavi Zahra Emamdjomeh 《Journal of Polymers and the Environment》2017,25(2):241-249
The feasibility of sweet cherry gum as a bio-based film-forming material and effect of hydrogen peroxide as a chemical modifier investigated. The influence of film compositions (gum, glycerol) and hydrogen peroxide on the physical properties of films, including solubility in water, permeability to water vapor (WVP), mechanical properties, and transparency, thermal and microstructural properties evaluated. The results showed that WVP and thickness increased by gum and glycerol concentration, but significantly decreased by hydrogen peroxide. As expected, elongation-at-break and solubility, increased at higher concentration of glycerol but the tensile strength decreased at the same condition. The film transparency was influenced by the dry weight content and was improved by higher concentrations of hydrogen peroxide. The partial degradation of polymer chain by hydrogen peroxide was observed by FTIR analysis. 相似文献
27.
Ghasemzadeh Nasim Iranbakhsh Alireza Oraghi-Ardebili Zahra Saadatmand Sara Jahanbakhsh-Godehkahriz Sodabeh 《Environmental science and pollution research international》2022,29(24):35897-35907
Environmental Science and Pollution Research - Cold plasma (CP) application has increasing interest due to its environmental-friendly, high efficient, and low cost aspects to mitigate deletion... 相似文献
28.
Dadashi Zahra Mahmoudi Ali Rashidi Saman 《Environmental science and pollution research international》2022,29(32):47837-47866
Environmental Science and Pollution Research - Slowing and reversing climate change and keeping energy prices at affordable levels are the main important achievements of the use of renewable... 相似文献
29.
Mahmodi Sheikh Sarmast Zahra Sedaghat Sajjad Derakhshi Pirouz Azar Parviz Aberoomand 《Journal of Polymers and the Environment》2022,30(7):2990-3004
Journal of Polymers and the Environment - In this study, Fe3O4 nanoparticles and chitosan along with silver nanoparticles was synthesized to apply for the rapid and simple removal of amoxicillin... 相似文献
30.
A simple and rapid ligand-less in situ surfactant-based solid phase extraction method for preconcentration of silver from water samples is developed. In this method, a cationic surfactant containing a proper alkyl group (n-dodecyltrimethylammonium bromide) is dissolved in the aqueous sample and then a proper ion-pairing agent (ClO4?) is added. Due to the interaction between surfactant and ion-pairing agent, solid particles are formed and used for adsorption of silver carbonate. After centrifugation, the sediment is dissolved in 2.0 mL 1 M HNO3 in ethanol and then aspirated directly into the flame atomic absorption spectrometer. Variables affecting the extraction efficiencies such as pH, concentrations of surfactant and CO32?, ion pair concentration, and extraction time, are optimized. Under such conditions, the calibration curve is linear from 3 to 700 μg L?1. Detection limit is 1.1 μg L?1 with an enrichment factor of 37. The relative standard deviation for eight replicate measurements of 100 μg L?1 is 2.1%. The method has been applied for the determination of silver in water samples. 相似文献