Influence of interfering anions on Cu2+ and Zn2+ ions removal on chestnut outer shell-derived hydrochars in aqueous solution
| Autor: | Kwan San Hui, Fang Chengran, Haifeng Zhuang, Liu Wanpeng, Shengdao Shan, Kwun Nam Hui, Xiaoting Hong |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
General Chemical Engineering Metal ions in aqueous solution Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Copper Hydrothermal circulation Hydrothermal carbonization Adsorption chemistry Fourier transform infrared spectroscopy 0210 nano-technology 0105 earth and related environmental sciences BET theory |
| Zdroj: | RSC Advances. 7:51199-51205 |
| ISSN: | 2046-2069 |
| Popis: | Hydrothermal carbonization method was used to produce different hydrochars from chestnut outer shell at various temperatures while resolving the environmental issues of agricultural bio-waste. Hydrochars were adopted as adsorbents to remove heavy metal ions (copper and zinc ions) from aqueous solution. Hydrochar samples were characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), and Brunauer-Emmett-Teller (BET) nitrogen adsorption-desorption isotherm. An increase in the hydrothermal temperature from 160 °C to 220 °C results in higher BET surface area (18.81 m2 g-1) and the porosity of the samples. The resultant hydrochar at 220 °C exhibited a more excellent adsorption performance (8.13 mg g-1 for copper nitrate) than the other two hydrochars at low hydrothermal temperature. The current study addressed the influence of interfering anions of nitrates, sulfates and chlorides on the adsorption performance. The result shows that the hydrochar possesses larger removal efficiency for heavy metal nitrates that that of chlorides and sulfates. |
| Databáze: | OpenAIRE |
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