Academic Journal
Effect and mechanisms of synthesis conditions on the cadmium adsorption capacity of modified fly ash
| Title: | Effect and mechanisms of synthesis conditions on the cadmium adsorption capacity of modified fly ash |
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| Authors: | Xin Zhao, Hanghang Zhao, Xunrong Huang, Lu Wang, Fuhao Liu, Xiongfei Hu, Jingtian Li, Guibin Zhang, Puhui Ji |
| Source: | Ecotoxicology and Environmental Safety, Vol 223, Iss , Pp 112550- (2021) |
| Publisher Information: | Elsevier, 2021. |
| Publication Year: | 2021 |
| Collection: | LCC:Environmental pollution LCC:Environmental sciences |
| Subject Terms: | Coal fly ash, Cadmium, Adsorption, Mechanisms, Optimization, Environmental pollution, TD172-193.5, Environmental sciences, GE1-350 |
| More Details: | In this study, modified coal fly ash (NMFA) was prepared by sodium hydroxide (NaOH) with low-temperature hydrothermal method. The differences of the ash to alkali mass ratio (5:3, 5:4, 5:5, 5:6), calcination temperature (100 ℃, 200 ℃, 300 ℃), and calcination time (1 h, 3 h, 5 h) were investigated. The adsorption experiments obtained the optimal result with the ash to base ratio of 5:5, calcination temperature of 200 ℃, and calcination time of 3 h, adsorbing 90.27 mg/g of Cd2+. The characterization results (SEM-EDS, FTIR, XRD, and XPS) also confirmed the effective adsorption of Cd2+ by NMFA. The functional groups of Si-O, Al-O, and Fe-O played an important role in Cd2+ removal. Meanwhile, the influences of dosage, different pH, and co-existing cations were also investigated. Quasi-secondary adsorption kinetics and Langmuir isotherm model were also referred to the Cd2+ adsorption by NMFA. Therefore, the good adsorption of NMFA-3 on Cd2+ provided new ideas for the safe utilization of fly ash and heavy metal purification in wastewater. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 0147-6513 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S014765132100662X; https://doaj.org/toc/0147-6513 |
| DOI: | 10.1016/j.ecoenv.2021.112550 |
| Access URL: | https://doaj.org/article/33ca3c6d4f864f3c8ba5209340711397 |
| Accession Number: | edsdoj.33ca3c6d4f864f3c8ba5209340711397 |
| Database: | Directory of Open Access Journals |
| ISSN: | 01476513 |
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| DOI: | 10.1016/j.ecoenv.2021.112550 |
| Published in: | Ecotoxicology and Environmental Safety |
| Language: | English |