Related Experiment Video
Updated: Mar 15, 2026

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
Published on: June 2, 2022
Efficiency of several leaching reagents on removal of Cu, Pb, Cd, and Zn from highly contaminated paddy soil
Ruili Gao1, Pengfei Zhu1, Guangguang Guo1
1Key Laboratory of Subtropical Agricultural Resource and Environment, Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
Abstract:
The efficiency of five different single leaching reagents (tartaric acid (TA), citric acid (CA), CaCl2, FeCl3, EDTA) and two different composite leaching reagents (CA + FeCl3, CA + EDTA) on removing Cu, Pb, Zn, and Cd from contaminated paddy soil in Hunan Province (in China) was studied. The results indicated that the efficiencies of CA, FeCl3, and EDTA on extracting Cu, Pb, Cd, and Zn from soil were greater than that of TA and CaCl2, and their extraction efficiencies were EDTA ≥ FeCl3 > CA. The efficiencies of CA + FeCl3 on extracting Cu, Pb, Cd, and Zn were higher than that of single CA or FeCl3. The 25 mmol L-1 CA + 20 mmol L-1 FeCl3 was a promising composite leaching reagent for paddy soil, and it could remove Cu (57.6 %), Pb (59.3 %), Cd (84.8 %), and Zn (28.0 %), respectively. With the same amount of leaching reagent, the efficiency of continuous leaching by several times was higher than that by once. In addition, the easily reducible and oxidizable fractions of heavy metals showed significant decrease during the process of leaching.
More Related Videos
10:31Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
Published on: December 6, 2015
09:23Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
Published on: June 21, 2015
Related Concept Videos
Extraction: Advanced Methods
Precipitation and Co-precipitation
Voltammetry: Stripping Methods
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
Bioremediation
Factors Affecting Solubility