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Adsorption and Reduction of Aqueous Cr by FeS-Modified Fe-Al Layered Double Hydroxide
- Source :
- Sustainability, Vol 14, Iss 21, p 21 (2022), Sustainability; Volume 14; Issue 1; Pages: 21
- Publication Year :
- 2022
- Publisher :
- MDPI AG, 2022.
-
Abstract
- To remedy the widespread chromium (Cr) pollution in the environment, this study mainly used the ultrasonic-assisted co-precipitation and precipitation methods to prepare FeS-modified Fe-Al-layered double hydroxide (FeS/LDH) composite material. The experimental results showed that FeS/LDH has higher removal efficiency of Cr in aqueous solution and stronger anti-interference ability than unmodified LDH. Under the same reaction conditions, the removal efficiency of total Cr(Cr(T)) using LDH was 34.85%, and the removal efficiency of Cr(VI) was 46.76%. For FeS/LDH, the removal efficiency of Cr(T) and Cr(VI) reached 99.57% and 100%, respectively. The restoration of Cr(T) and Cr(VI) by FeS/LDH satisfied the Langmuir adsorption isotherm. The maximum adsorption capacity of Cr(T) and Cr(VI) achieved 102.9 mg/g and 147.7 mg/g. The efficient removal of Cr by FeS/LDH was mainly based on the triple synergistic effect of anion exchange between Cr(VI) and interlayer anions, redox of Cr(VI) with Fe2+ and S2−, and co-precipitation of Fe3+ and Cr3+.
- Subjects :
- Environmental effects of industries and plants
Renewable Energy, Sustainability and the Environment
Geography, Planning and Development
TJ807-830
Management, Monitoring, Policy and Law
FeS/LDH
TD194-195
double reduction
Renewable energy sources
Environmental sciences
chromium
anti-interference
co-precipitation
GE1-350
Subjects
Details
- Language :
- English
- ISSN :
- 20711050
- Volume :
- 14
- Issue :
- 21
- Database :
- OpenAIRE
- Journal :
- Sustainability
- Accession number :
- edsair.doi.dedup.....eb9d2e3630114b26c3ae8cb71eb9ed4c