Skip to main content

Advertisement

Log in

Effects of an additive (hydroxyapatite–biochar–zeolite) on the chemical speciation of Cd and As in paddy soils and their accumulation and translocation in rice plants

  • Research Article
  • Published:
Environmental Science and Pollution Research Aims and scope Submit manuscript

Abstract

A pot experiment was carried out to investigate the remediation of paddy soils contaminated with both Cd and As. The effects of a soil additive (HZB: hydroxyapatite + zeolite + biochar) on the chemical speciation of Cd and As in the soil and on the accumulation and translocation of these two elements in rice plants were studied. The application of HZB decreased the concentration of acid-extractable Cd in the soil by 7.3–32.6% by promoting the transformation of soil Cd from soluble to insoluble species; as a result, the concentration of organically bound Cd in the soil increased by 6.8–49.5%. The application of HZB also promoted the transformation of soil As from soluble to insoluble species, thus increasing the concentration of Ca-bound As by 34.1–93.4% and reducing the concentration of soil-exchangeable As by 12.2–55.1%. However, when the application rate of HZB was greater than 4.0 g kg−1, the concentration of soil-exchangeable As increased again. It was found that the application of HZB decreased the Cd and As bioaccumulation capacity of rice root, and among various rice organs, rice husk was the highest in Cd transferring capacity, whereas rice root was the highest in As transferring capacity. When the amount of HZB applied was 0.05–0.2%, the Cd and As concentrations in the various parts of the rice plants decreased significantly.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1

Similar content being viewed by others

References

Download references

Funding

This study received financial support from the National Natural Science Foundation of China (No. 41501344), the Science Research Project jointly sponsored by the Ministry of Agriculture and the Ministry of Finance, PRC (Document [2015] No. 38), the Science Research project of the Education Department in Hunan Province Projects (No. 15K148), and the Hunan Province Projects of Construction of Key Academic Disciplines (No. 2006180).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Bo-Han Liao.

Additional information

Responsible editor: Yi-ping Chen

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Gu, JF., Zhou, H., Yang, WT. et al. Effects of an additive (hydroxyapatite–biochar–zeolite) on the chemical speciation of Cd and As in paddy soils and their accumulation and translocation in rice plants. Environ Sci Pollut Res 25, 8608–8619 (2018). https://doi.org/10.1007/s11356-017-0921-2

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11356-017-0921-2

Keywords

Navigation