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09:33
An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
Published on: December 17, 2018
A newly found cadmium accumulator--Malva sinensis Cavan
Shirong Zhang1, Mingying Chen, Ting Li
1College of Resources and Environment, Sichuan Agricultural University, 46 Xinkang Road, Yaan 625014, PR China. rsz01@163.com
Journal of Hazardous Materials
|September 22, 2009
Summary
Malva sinensis Cavan. shows potential for phytoremediation, acting as a cadmium (Cd) accumulator. This study identified it as a non-standard Cd-hyperaccumulator in contaminated soils.
Area of Science:
- Environmental Science
- Botany
- Bioremediation
Background:
- Phytoremediation utilizes hyperaccumulator and accumulator plants for heavy metal soil cleanup.
- Cadmium (Cd) contamination in soils poses significant environmental and health risks.
- Identifying efficient plant species is crucial for effective phytoremediation strategies.
Purpose of the Study:
- To evaluate Malva sinensis Cavan. as a potential cadmium (Cd) hyperaccumulator.
- To assess Cd accumulation in M. sinensis from soils with varying Cd concentrations.
- To determine the bioconcentration and translocation factors of Cd in M. sinensis.
Main Methods:
- A pot experiment was conducted with a soil Cd concentration gradient (0-200 mg kg(-1)).
- Malva sinensis Cavan. samples were collected from two lead-zinc mine sites in Sichuan, China.
- Cd concentrations, bioconcentration factors (BCF), and translocation factors (TF) in plant shoots were analyzed.
Main Results:
- Highest Cd concentrations in shoots reached 154.30 mg kg(-1) (Kangding) and 122.77 mg kg(-1) (Yajiang) at 200 mg kg(-1) soil Cd.
- Accumulation amounts in shoots were 700.5 microg pot(-1) (Kangding) and 1403.2 microg pot(-1) (Yajiang).
- Bioconcentration factors ranged from 0.53-1.03 (Kangding) and 0.69-1.25 (Yajiang), with all translocation factors exceeding 1.0.
Conclusions:
- Malva sinensis Cavan. demonstrates significant Cd accumulation capabilities.
- The species can be classified as a Cd-accumulator or a non-standard Cd-hyperaccumulator.
- M. sinensis shows promise for phytoremediation of Cd-contaminated soils.
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