Combined application of biochar and nano-zeolite enhanced cadmium immobilization and promote the growth of Pak Choi in cadmium contaminated soil

Shanshan Feng, Peng Zhang, Yanmei Hu, Feng Jin, Yuqing Liu, Shixin Cai, Zijie Song, Xing Zhang, Tcyganova Nadezhda, Zhiling Guo, Iseult Lynch, Xiuli Dang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Downloads (Pure)

Abstract

Biochar and zeolite have been demonstrated effective to remove heavy metals in soil; however, the effect of combined application of the both materials on the fraction of Cd and soil-plant system are largely unknown. Cd fractions in soil, growth and Cd uptake of Pak Choi were measured after the combined application of biochar (0, 5, 10 and 20 g·kg−1) and nano-zeolite (0, 5, 10, 20 g·kg−1) by pot experiment. Results showed that both single and combined application reduced the exchangeable Cd in soil and improved the plant growth. However, combined application of 20 g·kg−1 biochar with 10 g·kg−1 nano-zeolite showed the strongest effect, with the residual Cd in soil increased by 214% as compared with control. 20 g·kg−1 biochar with 10 g·kg−1 nano-zeolite Mechanic studies showed that this combination enhanced the antioxidant system, with the SOD, CAT and POD activities enhanced by 56.1%, 133.3% and 235.3%, respectively. The oxidative stress was reduced correspondingly, as shown by the reduced MDA contents (by 46.7%). This combination also showed the best efficiency in regulating soil pH, organic matter and soil enzymes thus improving the plant growth. This study suggests that combined application various materials such as biochar and nano-zeolite may provide new strategies for reducing the bioavailability of Cd in soil and thus the accumulation in edible plants.

Original languageEnglish
Article number100421
Number of pages11
JournalNanoImpact
Volume28
Early online date27 Aug 2022
DOIs
Publication statusPublished - Oct 2022

Bibliographical note

Funding Information:
The authors are thankful to the support of the National Key Research and Development Program of China (No. 2017YFD0801103 ), and the Open Foundation of Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs of China (No. 2015NYBKFT ). Additional support from EU H2020 project NanoSolveIT (Grant Agreement 814572 ) and NanoCommons (Grant Agreement 731032 ) are acknowledged.

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Biochar
  • Cadmium
  • Enzymatic activities
  • Nano-zeolite
  • Pak Choi

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Safety, Risk, Reliability and Quality
  • Safety Research
  • Public Health, Environmental and Occupational Health

Fingerprint

Dive into the research topics of 'Combined application of biochar and nano-zeolite enhanced cadmium immobilization and promote the growth of Pak Choi in cadmium contaminated soil'. Together they form a unique fingerprint.

Cite this