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Cited by 63Heavy metals in environmentExtraction and Separation ProcessesHeavy Metals in Plants

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Phytoextraction of Cd from a contaminated soil by tobacco and safe use of its metal-enriched biomass

Yang, Yang, Ge, Yichen, Tu, Pengfei, Zeng, Hongyuan, Zhou, Xihong, Zou, Dongsheng, Wang, Kelin, Zeng, Qingru·2019·Journal of Hazardous Materials
DOI 10.1016/j.jhazmat.2018.09.093
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Abstract

Successful phytoextraction produces a large quantity of contaminated biomass, which will cause secondary pollution unless properly treated. This study investigated the disposal of contaminated tobacco biomass after phytoextraction. We detected significantly high Cadmium concentrations in tobacco, especially in their stems and leaves. From the latter, nearly all the Cd and nicotine were removed by extractions with 0.5% HCl + 70% ethanol, and the nicotine completely recovered via steam distillation, whereas the protein content remained unaffected in the leaves, thus making them safe for use as animal feed. The highest biochar yield was 47%, obtained after slow pyrolysis at 300 °C. In this case, the biochar contained the highest amount of nutrients and metals. From stem biochar, 87% of Cd and a large amount K along with several other elements were extracted by deionized water at pH 1. After acid-extraction, metals were formed precipitation and then separated from the K-enriched solution when the pH was adjusted to 11 by using drops of 40% KOH. Therefore, with improved technology to remove metals and recover nutrients and nicotine from biomass, tobacco is an ideal candidate as profit yielding crop for use in phytoextraction while also providing renewable resources.

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Cited by

Sorted by citations

  • Sustainable management of post-phytoremediation biomass

    Mukherjee, S., Leri, A. C., Bandaranayaka, C., Vázquez-Núñez, E., Barros, R., Khan, A. H. A., Zhou, P., Zhang, T., Bernal, M. P., Clemente, R., et al. (2025) · Energy, Ecology and Environment · doi:10.1007/s40974-025-00364-w · Cited by 45

    “However, this biomass can store toxic elements, particularly when it comes from phytoextraction, which may lead to secondary pollution unless it is appropriately treated (Yang et al. 2019b).”

Metadata

Authors
Yang, Y., Ge, Y., Tu, P., Zeng, H., Zhou, X., Zou, D., Wang, K., & Zeng, Q.
Affiliations
  • Chinese Academy of Sciences (CN)
  • Hunan Agricultural University (CN)
Corresponding author
Zeng, Qingru
ORCID
Venue
Journal of Hazardous Materials
Publisher
Elsevier BV
Published
2019-02
Volume
363
Pages
385-393
ISSN
0304-3894 (ISSN-L)
DOI
10.1016/j.jhazmat.2018.09.093
OpenAlex
W2894842808
Cited by
63
References
2
Citations by year
2026: 4 · 2025: 10 · 2024: 13 · 2023: 7 · 2022: 10 · 2021: 7 · 2020: 10 · 2019: 2
FWCI
1.78
Type
journal article
Language
en
Open access
closed
Licence
Locations
  • Journal of Hazardous Materials (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (41701366)
  • National Key Research and Development Program of China (2016YFD0800807)
Topics
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
  • Physical Sciences › Materials Science › Metals and Alloys › Extraction and Separation Processes
  • Physical Sciences › Chemistry › Analytical Chemistry › Heavy Metals in Plants
Keywords
phytoextraction, cadmium, contaminated soil, tobacco, biochar, slow pyrolysis, metal recovery, animal feed, secondary pollution, nutrient recovery
MeSH terms
Biodegradation, Environmental, Cadmium, Charcoal, Nicotine, Potassium, Soil Pollutants, Nicotiana

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