Cadmium phytoextraction efficiency of hyperaccumulator as affected by harvest stage in three continuous years

Xuekai Dou; Huiping Dai; Dariusz Grzebelus; Lidia Skuza; Shuhe Wei

doi:10.1016/j.chemosphere.2022.137639

Cadmium phytoextraction efficiency of hyperaccumulator as affected by harvest stage in three continuous years

Chemosphere. 2023 Feb:313:137639. doi: 10.1016/j.chemosphere.2022.137639. Epub 2022 Dec 22.

Authors

Xuekai Dou¹, Huiping Dai², Dariusz Grzebelus³, Lidia Skuza⁴, Shuhe Wei⁵

Affiliations

¹ Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
² College of Biological Science & Engineering, Shaanxi Province Key Laboratory of Bio-resources, Qinling-Bashan Mountains Bioresources Comprehensive Development C.I.C, State Key Laboratory of Biological Resources and Ecological Environment Jointly Built By Qinba Province and Ministry, Shaanxi University of Technology, Hanzhong, 723001, China. Electronic address: daihp72@snut.edu.cn.
³ Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, Krakow, 31-120, Poland.
⁴ Institute of Biology, The Centre for Molecular Biology and Biotechnology, University of Szczecin, Szczecin, 71-415, Poland.
⁵ Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China. Electronic address: shuhewei@iae.ac.cn.

PMID: 36566791
DOI: 10.1016/j.chemosphere.2022.137639

Abstract

Phytoremediation which mainly using hyperaccumulator is a very popular and environmental-friendly clean method. Long term continuous test is very important due to its low remediation efficiency in a growth period. Cd hyperaccumulator Rorippa globosa (Turcz.) Thell. Was used to explore the effect of two remediation modes (harvests at flowering and maturity stages) on the continuous remediation efficiency in a 3-year experiment using pot experiment with real Cd contaminated soil. The results showed that the biomass in maturity-harvest treatments was 1.12 times of that in flowering-harvest treatments due to the short vegetation time. Shoot Cd concentrations in the flowering-harvest treatments were on average 15.4% lower compared to the maturity-harvest treatments either. However, the Cd phytoextraction efficiency (PE) in the flowering-harvest treatments was 13.8% higher compared to the harvests at the maturity stage due to the growth cycle of R. globosa harvested at the flowering was 34.5% of shorter compared to those in the maturity harvest treatments. After three consecutive years of R. globosa phytoextraction, the concentration of extractable Cd decreased on average by 28.7% and corresponding PEs lower either. It was suggested that cultivation modes of R. globosa and low-accumulation crop rotation, or three times flowering harvests of R. globosa per year seemed to be a good choice in practical solution.

Keywords: Cd-contaminated agriculture soil; Extractable Cd in Soil; Harvest at flowering stage; Hyperaccumulator.

MeSH terms

Biodegradation, Environmental
Biomass
Cadmium* / analysis
Soil
Soil Pollutants* / analysis

Substances

Cadmium
Soil Pollutants
Soil