Preparation, Performances and Mechanisms of Co@AC Composite for Herbicide Atrazine Removal in Water
Autor: | Dunqiu Wang, Jinxiao Zhang, Jie Liu, Zhihong Tu, Danxia Liu, Liangliang Huang, Huijun He, Yongpan Liu |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
lcsh:Hydraulic engineering
Geography Planning and Development Infrared spectroscopy 02 engineering and technology 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry law.invention chemistry.chemical_compound symbols.namesake lcsh:Water supply for domestic and industrial purposes Adsorption lcsh:TC1-978 law medicine Calcination Freundlich equation activated carbon Atrazine Fourier transform infrared spectroscopy 0105 earth and related environmental sciences Water Science and Technology adsorption kinetic lcsh:TD201-500 Langmuir adsorption model 021001 nanoscience & nanotechnology cobalt adsorption isotherm chemistry symbols 0210 nano-technology Activated carbon medicine.drug Nuclear chemistry atrazine |
Zdroj: | Water Volume 13 Issue 2 Water, Vol 13, Iss 240, p 240 (2021) |
ISSN: | 2073-4441 |
DOI: | 10.3390/w13020240 |
Popis: | In this study, a high-performance adsorbent Co@AC was prepared by loading cobalt ions (Co2+) on activated carbon (AC) via solution impregnation and high-temperature calcination technology, and was used to remove atrazine in water. The preparation factors on the adsorbent properties were studied, and the characteristics were analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectrometer (FTIR). The results showed that Co@AC possessed the best performance when the factors were 7.0% of Co2+ (w/v), 7.0 h of immersing time, 500 ° C of calcination temperature and 4.0 h of calcination time. The adsorption conditions and mechanisms for atrazine removal by Co@AC were also studied scientifically. As the conditions were pH 4.0, reaction time 90 min and temperature 25 ° C, Co@AC had the largest adsorption capacity, which was 92.95 mg/g, and the maximum removal rate reached 94.79%. The correlation coefficient of the Freundlich isotherm was better than that of the Langmuir isotherm, and the adsorption process followed the pseudo-second-order kinetic model. Cycle experiments showed that the removal efficiency of atrazine by Co@AC remained above 85% after five repeated experiments, indicating that Co@AC showed a strong stable performance and is a promising material for pesticides removal. |
Databáze: | OpenAIRE |
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