Cargando…
Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+)
In this study, aged biochar (CCB350 and CCB650) were obtained from pyrolysis of corn stalk biochar (CB350 and CB650) at the degree of 350 °C and 650 °C by artificial oxidation with hydrogen peroxide (H(2)O(2)). Also, the mechanism of Pb(2+) and Cd(2+) on fresh and aged biochars was analyzed qualitat...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9252994/ https://www.ncbi.nlm.nih.gov/pubmed/35788642 http://dx.doi.org/10.1038/s41598-022-15494-y |
_version_ | 1784740398819704832 |
---|---|
author | Wang, Zhe Geng, Chengxin Bian, Yuan Zhang, Guangyu Zheng, Chunli An, Chunjiang |
author_facet | Wang, Zhe Geng, Chengxin Bian, Yuan Zhang, Guangyu Zheng, Chunli An, Chunjiang |
author_sort | Wang, Zhe |
collection | PubMed |
description | In this study, aged biochar (CCB350 and CCB650) were obtained from pyrolysis of corn stalk biochar (CB350 and CB650) at the degree of 350 °C and 650 °C by artificial oxidation with hydrogen peroxide (H(2)O(2)). Also, the mechanism of Pb(2+) and Cd(2+) on fresh and aged biochars was analyzed qualitatively and quantitatively by batch adsorption experiments combined with characterization. The adsorption isotherm results showed that aging treatment decreased the adsorption capacity of Pb(2+) and Cd(2+) and inhibited the competitive adsorption behavior of heavy metals. In the single-metal system, precipitation and cation exchange were considered as the main adsorption mechanisms for CB350 and CB650, with a ratio of 40.07–48.23% and 38.04–57.19%, respectively. Competition between Pb(2+) and Cd(2+) increased the relative contribution of mineral precipitation, but decreased the contribution of cation exchange mechanism. Aging resulted in the rise of the contribution of surface complexation to the adsorption of Pb(2+) and Cd(2+) on biochars, especially in low-temperature biochars, but weakened the contribution of mineral precipitation to the adsorption. Further, the contribution of other adsorption mechanisms was significantly enhanced for high-temperature aged biochars. These results are important to evaluate its long-term application prospects in the natural environment. |
format | Online Article Text |
id | pubmed-9252994 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-92529942022-07-06 Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+) Wang, Zhe Geng, Chengxin Bian, Yuan Zhang, Guangyu Zheng, Chunli An, Chunjiang Sci Rep Article In this study, aged biochar (CCB350 and CCB650) were obtained from pyrolysis of corn stalk biochar (CB350 and CB650) at the degree of 350 °C and 650 °C by artificial oxidation with hydrogen peroxide (H(2)O(2)). Also, the mechanism of Pb(2+) and Cd(2+) on fresh and aged biochars was analyzed qualitatively and quantitatively by batch adsorption experiments combined with characterization. The adsorption isotherm results showed that aging treatment decreased the adsorption capacity of Pb(2+) and Cd(2+) and inhibited the competitive adsorption behavior of heavy metals. In the single-metal system, precipitation and cation exchange were considered as the main adsorption mechanisms for CB350 and CB650, with a ratio of 40.07–48.23% and 38.04–57.19%, respectively. Competition between Pb(2+) and Cd(2+) increased the relative contribution of mineral precipitation, but decreased the contribution of cation exchange mechanism. Aging resulted in the rise of the contribution of surface complexation to the adsorption of Pb(2+) and Cd(2+) on biochars, especially in low-temperature biochars, but weakened the contribution of mineral precipitation to the adsorption. Further, the contribution of other adsorption mechanisms was significantly enhanced for high-temperature aged biochars. These results are important to evaluate its long-term application prospects in the natural environment. Nature Publishing Group UK 2022-07-04 /pmc/articles/PMC9252994/ /pubmed/35788642 http://dx.doi.org/10.1038/s41598-022-15494-y Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Wang, Zhe Geng, Chengxin Bian, Yuan Zhang, Guangyu Zheng, Chunli An, Chunjiang Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+) |
title | Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+) |
title_full | Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+) |
title_fullStr | Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+) |
title_full_unstemmed | Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+) |
title_short | Effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of Cd(2+) and Pb(2+) |
title_sort | effect of oxidative aging of biochar on relative distribution of competitive adsorption mechanism of cd(2+) and pb(2+) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9252994/ https://www.ncbi.nlm.nih.gov/pubmed/35788642 http://dx.doi.org/10.1038/s41598-022-15494-y |
work_keys_str_mv | AT wangzhe effectofoxidativeagingofbiocharonrelativedistributionofcompetitiveadsorptionmechanismofcd2andpb2 AT gengchengxin effectofoxidativeagingofbiocharonrelativedistributionofcompetitiveadsorptionmechanismofcd2andpb2 AT bianyuan effectofoxidativeagingofbiocharonrelativedistributionofcompetitiveadsorptionmechanismofcd2andpb2 AT zhangguangyu effectofoxidativeagingofbiocharonrelativedistributionofcompetitiveadsorptionmechanismofcd2andpb2 AT zhengchunli effectofoxidativeagingofbiocharonrelativedistributionofcompetitiveadsorptionmechanismofcd2andpb2 AT anchunjiang effectofoxidativeagingofbiocharonrelativedistributionofcompetitiveadsorptionmechanismofcd2andpb2 |