Preparation of Mg,N-co-doped lignin adsorbents for enhanced selectivity and high adsorption capacity of As (V) from wastewater
| Autor: | Zhanhu Guo, Qinglong Jiang, Sifang Kong, Junhua Li, Xiaofeng Shi, Duo Pan, Junmao Hong, Jing Lin, Chao Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Langmuir
General Chemical Engineering Doping Kinetics Oxyanion 02 engineering and technology 021001 nanoscience & nanotechnology chemistry.chemical_compound Adsorption 020401 chemical engineering chemistry Wastewater Lignin General Materials Science 0204 chemical engineering 0210 nano-technology Selectivity Nuclear chemistry |
| Zdroj: | Particuology. 58:206-213 |
| ISSN: | 1674-2001 |
| DOI: | 10.1016/j.partic.2021.03.014 |
| Popis: | Among various environmental problems, water pollution has drawn more and more attention. To develop an adsorbent with enhanced selectivity and high capacity for As (V) oxyanion, a novel lignin-based adsorbent was prepared by doping with N and modifying with Mg2+, using thiethylenetetramine (TETA) and MgCl2 as the source of N and Mg2+, respectively. N-doped lignin (NL) shows a high selectivity for As (V), which is further enhanced by modifying with Mg2+ (MNL). MNL shows an excellent reusability. The adsorption isotherms and kinetics of MNL for As (V) follow Langmuir isotherms model and pseudo-second-order kinetics model, respectively. The adsorption of MNL for As (V) achieved a maximum adsorption capacity of 687.46 mg g−1 and the equilibrium was established within 30 min. This study offers a novel idea on the recycle of the waste of paper industry and provides a new technology for As (V) adsorption from wastewater. |
| Databáze: | OpenAIRE |
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