| Autor: |
Yaohong Zhang, Renrong Liu, Liya Tan, Ningcan Yang, Kerkula, Anna, Hai Wang |
| Předmět: |
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| Zdroj: |
Desalination & Water Treatment; May2021, Vol. 221, p152-162, 11p |
| Abstrakt: |
In the study, the peanut shell was selected as original biochar and modified by adding montmorillonite to obtain modified biochar (B@M). The adsorbent was characterized by scanning electron microscopy, Brunauer-Emmett-Teller, Fourier-transform infrared spectroscopy and X-ray diffraction. The adsorption kinetics study of Pb(II) on B@M showed that the adsorption process of Pb(II) was according to the pseudo-second-order model and Langmuir adsorption model. The maximum adsorption capacity of B@M (61.5 mg g-1) was significantly higher than that of the biochar (35.5 mg g-1) and montmorillonite (54.4 mg g-1) and the reproducibility study indicated that B@M had good reproducibility. When the B@M was added to the microcosms of constructed wetlands (MCW), it showed that with the increase of the amount of B@M, the removal rate of lead in water increased significantly, which was 31.3%, 48.3% and 86.1%, respectively and can reduce the stress of Pb(II) in plants of MCW. Therefore, B@M can be used as a new substrate material and heavy metal Pb(II) adsorbent for constructed wetlands. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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