The screening of various biochars for Cd 2+ removal at relevant soil pH
Fourteen biochars from seven biomass sources were investigated on their long-term Cd removal. The experiments consisted of a ten-day batch Cd adsorption in a pH-buffered solution (pH = 6) to minimise pH effects. Insect frass, spent peat and chicken manure-derived biochars are promising Cd adsorbents...
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| Veröffentlicht in: | Waste management (Elmsford) 2023-06, Vol.168, p.376 |
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| creator | Lataf, A Carleer, R Yperman, J Schreurs, S D'Haen, J Cuypers, A Vandamme, D |
| description | Fourteen biochars from seven biomass sources were investigated on their long-term Cd
removal. The experiments consisted of a ten-day batch Cd
adsorption in a pH-buffered solution (pH = 6) to minimise pH effects. Insect frass, spent peat and chicken manure-derived biochars are promising Cd
adsorbents. Pyrolysis temperature was crucial for optimising Cd
removal by insect frass and spent peat-derived biochars. For these biochars, a pyrolysis temperature of 450 °C was optimal. In contrast, the Cd
removal by chicken manure biochars was independent of pyrolysis temperature. The Cd
removal by insect-frass and spent peat-derived biochars was associated with chemisorption on surface functionalities, while using chicken manure biochars was more associated with Cd
precipitation. The kinetics of Cd
removal over the course of ten days showed that insect frass biochar (450 °C) showed a gradual increase from 36 to 75 % Cd
removal, while chicken manure and spent peat-derived biochar (450 °C) already showed a higher Cd
removal (72 - 89 %) after day 1. This evidences that a long-term Cd
removal effect can be expected for some biochars. This should certainly be taken into consideration in future soil-based experiments. |
| doi_str_mv | 10.1016/j.wasman.2023.06.018 |
| format | Article |
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removal. The experiments consisted of a ten-day batch Cd
adsorption in a pH-buffered solution (pH = 6) to minimise pH effects. Insect frass, spent peat and chicken manure-derived biochars are promising Cd
adsorbents. Pyrolysis temperature was crucial for optimising Cd
removal by insect frass and spent peat-derived biochars. For these biochars, a pyrolysis temperature of 450 °C was optimal. In contrast, the Cd
removal by chicken manure biochars was independent of pyrolysis temperature. The Cd
removal by insect-frass and spent peat-derived biochars was associated with chemisorption on surface functionalities, while using chicken manure biochars was more associated with Cd
precipitation. The kinetics of Cd
removal over the course of ten days showed that insect frass biochar (450 °C) showed a gradual increase from 36 to 75 % Cd
removal, while chicken manure and spent peat-derived biochar (450 °C) already showed a higher Cd
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removal. The experiments consisted of a ten-day batch Cd
adsorption in a pH-buffered solution (pH = 6) to minimise pH effects. Insect frass, spent peat and chicken manure-derived biochars are promising Cd
adsorbents. Pyrolysis temperature was crucial for optimising Cd
removal by insect frass and spent peat-derived biochars. For these biochars, a pyrolysis temperature of 450 °C was optimal. In contrast, the Cd
removal by chicken manure biochars was independent of pyrolysis temperature. The Cd
removal by insect-frass and spent peat-derived biochars was associated with chemisorption on surface functionalities, while using chicken manure biochars was more associated with Cd
precipitation. The kinetics of Cd
removal over the course of ten days showed that insect frass biochar (450 °C) showed a gradual increase from 36 to 75 % Cd
removal, while chicken manure and spent peat-derived biochar (450 °C) already showed a higher Cd
removal (72 - 89 %) after day 1. This evidences that a long-term Cd
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removal. The experiments consisted of a ten-day batch Cd
adsorption in a pH-buffered solution (pH = 6) to minimise pH effects. Insect frass, spent peat and chicken manure-derived biochars are promising Cd
adsorbents. Pyrolysis temperature was crucial for optimising Cd
removal by insect frass and spent peat-derived biochars. For these biochars, a pyrolysis temperature of 450 °C was optimal. In contrast, the Cd
removal by chicken manure biochars was independent of pyrolysis temperature. The Cd
removal by insect-frass and spent peat-derived biochars was associated with chemisorption on surface functionalities, while using chicken manure biochars was more associated with Cd
precipitation. The kinetics of Cd
removal over the course of ten days showed that insect frass biochar (450 °C) showed a gradual increase from 36 to 75 % Cd
removal, while chicken manure and spent peat-derived biochar (450 °C) already showed a higher Cd
removal (72 - 89 %) after day 1. This evidences that a long-term Cd
removal effect can be expected for some biochars. This should certainly be taken into consideration in future soil-based experiments.</abstract><cop>United States</cop><pmid>37348380</pmid><doi>10.1016/j.wasman.2023.06.018</doi></addata></record> |
| fulltext | fulltext |
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| ispartof | Waste management (Elmsford), 2023-06, Vol.168, p.376 |
| issn | 1879-2456 |
| language | eng |
| recordid | cdi_pubmed_primary_37348380 |
| source | Elsevier ScienceDirect Journals |
| title | The screening of various biochars for Cd 2+ removal at relevant soil pH |
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