Phosphate Removal Mechanisms in Aqueous Solutions by Three Different Fe-Modified Biochars
Bibliographic Data
| ID | 15464271 |
|---|---|
| Authors | Yiyin Qin (Foshan University), Xinyi Wu (0009-0009-9933-7298, Foshan University), Qiqi Huang (0000-0001-7286-1190, Foshan University), Jingzi Beiyuan (0000-0001-5846-6071, Foshan University, corresponding author), Jin Wang (0009-0007-2219-6293, Guangzhou University), Juan Liu (0009-0009-0692-8882, Guangzhou University), Wenbing Yuan (0000-0001-5367-9772, Foshan University), Chengrong Nie (Foshan University), Hailong Wang (0009-0003-6619-7213, Foshan University) |
| Year | 2022 |
| Volume | 20 |
| Issue | 1 |
| Pages | 326-326 |
| Publication date | 2022-12-25 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph20010326 |
| PMID | 36612648 |
| OpenAlex | W4313259842 |
| Language | EN |
| References cited | 62 |
Iron-modified biochar can be used as an environmentally friendly adsorbent to remove the phosphate in wastewater because of its low cost. In this study, Fe-containing materials, such as zero-valent iron (ZVI), goethite, and magnetite, were successfully loaded on biochar. The phosphate adsorption mechanisms of the three Fe-modified biochars were studied and compared. Different characterization methods, including scanning electron microscopy/energy-dispersive spectrometry (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), were used to study the physicochemical properties of the biochars. The dosage, adsorption time, pH, ionic strength, solution concentration of phosphate, and regeneration evaluations were carried out. Among the three Fe-modified biochars, biochar modified by goethite (GBC) is more suitable for phosphate removal in acidic conditions, especially when the pH = 2, while biochar modified by ZVI (ZBC) exhibits the fastest adsorption rate. The maximum phosphate adsorption capacities, calculated by the Langmuir-Freundlich isothermal model, are 19.66 mg g -1 , 12.33 mg g -1 , and 2.88 mg g -1 for ZBC, GBC, and CSBC (biochar modified by magnetite), respectively. However, ZBC has a poor capacity for reuse. The dominant mechanism for ZBC is surface precipitation, while for GBC and CSBC, the major mechanisms are ligand exchange and electrostatic attraction. The results of our study can enhance the understanding of phosphate removal mechanisms by Fe-modified biochar and can contribute to the application of Fe-modified biochar for phosphate removal in water
Aqueous solution · Phosphate · Adsorption and biosorption for pollutant removal · Chemical Engineering · Chemistry · Engineering · Environmental Science · Iron oxide chemistry and applications · Phosphorus and nutrient management · Biochemistry · Environmental Chemistry · Organic Chemistry
| Citation velocity | historical |
|---|---|
| Highly cited | No |