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Reductive degradation of carbaryl in water by zero-valent iron 总被引:6,自引:0,他引:6
Reduction of carbaryl solution by zero-valent iron powder (ZVIP) was studied in a rotator batch system (70 rpm) in order to evaluate the utility of this reaction in remediation of carbamate contaminated water. Degradation with different amount of ZVIP: 0.01, 0.02, 0.03, 0.04 g/ml at pH 6.6 and at ambient temperature was investigated. The results show that the process exhibits a degradation rate appearing to be directly proportional to the surface contact area of ZVIP (325-mesh) with the carbaryl molecules. Three analytical techniques were used to monitor carbaryl degradation: (1) A UV-Vis diode array spectrophotometer was used to record all spectra. (2) A high performance liquid chromatography was used to separate by-products and examine the evolution of breakdown products. (3) A home-built spectrophosphorimeter that uses the solid surface room temperature phosphorescence (SSRTP) was employed to observe selectively the decline of the carbaryl concentration at different amount of ZVIP on Whatman no. 1 filter paper. Results show that the reducing degradation of carbaryl with ZVIP as the source of electrons is effective with a half-life close to several minutes. 相似文献
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Ayari Jamel Barbieri Maurizio Agnan Yannick Sellami Ahmed Braham Ahmed Dhaha Faouzi Charef Abdelkarim 《Environmental geochemistry and health》2021,43(10):4027-4042
Environmental Geochemistry and Health - High-quality and accurate environmental investigations are essential for the evaluation of contamination and subsequent decision-making processes. A... 相似文献
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Ghauch A Turnar C Fachinger C Rima J Charef A Suptil J Martin-Bouyer M 《Chemosphere》2000,40(12):1327-1333
Diffuse reflectance spectroscopy can be successfully used for the quantitative determination of small amounts of pollutants like metals. The remission function was found to be linearly proportional to the concentration, when we applied the Kubelka–Munk equation. The color reactions of Cu(II), Co(II), and Ni(II) with dithiooxamide, were realised on filter paper. Reaction between Fe(III) and ammonium thiocyanate was realized on filter paper and gelatine matrix. All measurements were accomplished with a laboratory-constructed reflectometer. We have obtained a calibration curve by plotting the optical density of reflectance AR vs log of the mol l−1 concentration. Limits of detection at the 10−4 M level were estimated for all the compounds. Linear dynamic range extend over one order of magnitude and shows the potential of device for the quantitative analysis of environmental pollutants. 相似文献
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Trifi Mariem Gasmi Anis Carbone Cristina Majzlan Juraj Nasri Nesrine Dermech Mohja Charef Abdelkrim Elfil Hamza 《Environmental science and pollution research international》2022,29(58):87490-87508
Environmental Science and Pollution Research - In northern Tunisia, Sidi Driss sulfide ore valorization had produced a large waste amount. The long tailings exposure period and in situ minerals... 相似文献
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