Lead and cadmium sorption mechanisms on magnetically modified biochars
Language English Country England, Great Britain Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
26748045
DOI
10.1016/j.biortech.2015.12.056
PII: S0960-8524(15)01686-7
Knihovny.cz E-resources
- Keywords
- Cation release, Fe oxide impregnation, Magnetic biochar, Metal sorption, Wastewater treatment,
- MeSH
- Adsorption MeSH
- Water Purification methods MeSH
- Charcoal chemistry MeSH
- Cadmium chemistry MeSH
- Hydrogen-Ion Concentration MeSH
- Magnetics MeSH
- Wastewater chemistry MeSH
- Lead chemistry MeSH
- Ferric Compounds chemistry MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- biochar MeSH Browser
- Charcoal MeSH
- ferric oxide MeSH Browser
- Cadmium MeSH
- Waste Water MeSH
- Lead MeSH
- Ferric Compounds MeSH
This paper discusses Cd(II) and Pb(II) sorption efficiency of biochars modified by impregnation with magnetic particles. All selected biochar characteristics were significantly affected after the modification. More specifically, the cation exchange capacity increased after the modification, except for grape stalk biochar. However, the changes in the pH value, PZC, and BET surface after modification process were less pronounced. The metal loading rate was also significantly improved, especially for Cd(II) sorption on/in nut shield and plum stone biochars (10- and 16-times increase, respectively). The results indicated that cation exchange (as a metal sorption mechanism) was strengthened after Fe oxide impregnation, which limited the desorbed amount of tested metals. In contrast, the magnetization of grape stalk biochar reduced Pb(II) sorption in comparison with that of pristine biochar. Magnetic modification is, therefore, more efficient for biochars with well-developed structure and for more mobile metals, such as Cd(II).
References provided by Crossref.org
Magnetically Modified Biosorbent for Rapid Beryllium Elimination from the Aqueous Environment
