Mono-and co-applications of Ca-bentonite with zeolite, Ca-hydroxide, and tobacco biochar affect phytoavailability and uptake of copper and lead in a gold mine-polluted soil
Abstract
We assessed the efficacy of Ca-bentonite (CB) alone and combined with Ca-hydroxide (CH), tobacco biochar (TB), and zeolite (ZL) aiming to immobilize Cu and Pb and decrease their bioavailability and uptake by pak choi followed by maize in a mining contaminated soil. The CB alone was able to decrease the availability and uptake of Cu and Pb by pak choi and maize. The mono- and multi-combination of CH, TB, and ZL with CB showed contradictory impact on the availability and uptake of Cu and Pb as compared to the mono-application of CB. The combination of CB with ZL and CH + ZL reduced the uptake of Pb by pak choi and maize, while the combination of CB with TB and ZL reduced the uptake of Cu by pak choi and maize as compared to the mono-application of CB. The co-application of CB with CH increased the phytoextraction of Cu by maize and Pb by pak choi shoots as compared to the mono-application of CB. We conclude that modified clays such as CB alone or combined with ZL, TB, and/or CH might be suitable candidates for phytomanagement of Cu and Pb contaminated soils.
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Increased pH after applying bentonite is another mechanism that reduces PTE mobility.
“Increased pH after applying bentonite is another mechanism that reduces PTE mobility (Lahori et al., 2019).”
From Soil amendments for immobilization of potentially toxic elements in contaminated soils: A critical review (2020) · cites this paper as Lahori et al., 2019
Alkaline clay minerals such as bentonite, sepiolite, and palygorskite would have better PTE immobilizing effects by increasing soil pH after application.
“Alkaline clay minerals such as bentonite, sepiolite, and palygorskite would have better PTE immobilizing effects by increasing soil pH after application (Lahori et al., 2019;Yi et al., 2017).”
From Soil amendments for immobilization of potentially toxic elements in contaminated soils: A critical review (2020) · cites this paper as Lahori et al., 2019
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References 46 · Cited by 42
- Authors
- Lahori, A. H., Zhang, Z., Shaheen, S. M., Rinklebe, J., Guo, Z., Li, R., Mahar, A., Wang, Z., Ren, C., Mi, S., Liu, T., & Jing, R.
- Affiliations
- Northwest A&F University (CN)
- Kafrelsheikh University (EG)
- University of Wuppertal (DE)
- University of Sindh (PK)
- Ningxia University (CN)
- Corresponding author
- Zhang, Zengqiang
- Shaheen, Sabry M.
- Rinklebe, Jörg
- ORCID
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2019-07
- Volume
- 374
- Pages
- 401-411
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2938929540
- Cited by
- 42
- References
- 46
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 7 · 2023: 7 · 2022: 5 · 2021: 3 · 2020: 9 · 2019: 3
- FWCI
- 1.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Alexander von Humboldt-Stiftung
- Topics
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Keywords
- calcium bentonite, zeolites, calcium hydroxide, copper, lead, heavy metal immobilization, phytoavailability, heavy metal uptake, phytoremediation, mining-contaminated soil, Brassica chinensis, maize
- MeSH terms
- Bentonite, Calcium, Calcium Hydroxide, Charcoal, China, Chlorophyll, Copper, Zea mays, Gold, Hydrogen-Ion Concentration, Lead, Mining, Soil, Soil Pollutants, Nicotiana, Zeolites
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