Preparation of Sodium Lignosulfonate/Chitosan Adsorbent and Application of Pb2+ Treatment in Water
| Autor: | Fulong Cheng, Jiangwei Zhu, Jie Pan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Metal ions in aqueous solution
Geography Planning and Development Radical polymerization lcsh:TJ807-830 lcsh:Renewable energy sources lignosulfonate 02 engineering and technology Management Monitoring Policy and Law 010402 general chemistry 01 natural sciences Chitosan Industrial wastewater treatment chemistry.chemical_compound adsorbent Adsorption Fourier transform infrared spectroscopy Thermal analysis lcsh:Environmental sciences lcsh:GE1-350 Renewable Energy Sustainability and the Environment Sodium lignosulfonate lcsh:Environmental effects of industries and plants 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:TD194-195 chemistry Chemical engineering chitosan 0210 nano-technology orthogonal optimization |
| Zdroj: | Sustainability, Vol 13, Iss 2997, p 2997 (2021) Sustainability Volume 13 Issue 5 |
| ISSN: | 2071-1050 |
| Popis: | Industrial wastewater has brought huge disasters to water resources and soil and has seriously affected the growth of animals and plants. There is an urgent need for a green and efficient adsorbent to solve the problem of water pollution. Sodium lignosulfonate and chitosan undergo free radical polymerization to form a lignin/chitosan adsorbent, which is used to treat Pb2+ in water pollution. An orthogonal experiment was used to optimize the content of sodium lignosulfonate, chitosan, cross-linking agent and initiator to obtain the adsorbent with the best adsorption performance. The adsorbents were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermal analysis and zeta potentiometry. The influence of different conditions on the adsorption of heavy metal ions by lignosulfonate/chitosan adsorbent was explored, and a kinetic and isotherm model was established. The results showed that the adsorption capacity of Pb2+ was 345 mg g–1 when the adsorbent was 0.01 g, the concentration of heavy metal ions was 100 mg L–1 and pH was 7. The adsorption process of lignosulfonate/chitosan is a kind of spontaneous adsorption mode, which is mainly composed of electrostatic adsorption and chemical adsorption. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|