Effects of amendments on heavy metal immobilization and uptake by Rhizoma chuanxiong on copper and cadmium contaminated soil

Abstract

An improved method was applied for remediating cadmium and copper co-contaminated soil and reducing the metal concentration in Rhizoma chuanxiong. Pot experiments were conducted with six amendments (composed with bentonite, phosphate, humic acid, biochar, sepiolite powder, etc.). The results showed that soil pH, biological activities (soil enzymatic activities and microbial counts) and R. chuanxiong biomass were greatly improved with the addition of amendments in all treatments, especially in T3 and T6. Also, amendments effectively decreased the concentration of malondialdehyde and H2O2 in R. chuanxiong. In the T3 treatment, the bio-available Cd and Cu in soil were significantly decreased by 0.53 and 0.41 mg kg−1, respectively. Meanwhile, the amendment in T3 reduced Cd and Cu accumulation in R. chuanxiong about 45.83 and 39.37%, respectively, compared to T0. Moreover, the Fourier transform infrared spectroscopy spectra showed the surface functional groups of every amendment. To conclude, this study offers an effective and environmental method to reduce metal accumulation in R. chuanxiong on heavy metal co-contaminated soil.

Mitigation of Cadmium Induced Oxidative Stress by Using Organic Amendments to Improve the Growth and Yield of Mash Beans [Vigna mungo (L.)]

“…This practice has been found effective, eco-friendly and economical in reducing the toxic metal bio-availability [22,23]. The application of organic amendments such as press mud, compost, and farmyard manures (FYM) improve the soil properties and reduce the toxic metals' bio-availability in contaminated soils [24,25]. The application of organic amendments decreases the metals' availability by forming strong organic complexes with metals [26].…”

Effects of biochar, farm manure, and pressmud on mineral nutrients and cadmium availability to wheat ( Triticum aestivum L.) in Cd‐contaminated soil

“…In addition, pH has been stated to be the major factor in regulating the uptake of Cd by roots (Rizwan et al, 2012). The rise in soil pH with treatment could be attributed to the functional groups located at the surface of biochar (Xie et al, 2018). According to our findings, Uzoma et al (2011) observed a negative correlation between pH and Cd of the soil in the presence of biochar.…”

Enmiendas orgánicas en la inmovilización de cadmio en suelos agrícolas contaminados: una revisión

“…Experimentos realizados por Xie et al (2018) evaluaron 6 enmiendas orgánicas compuestas en la inmovilización del Cd y reportaron una disminución prominente en el contenido de Cd y Cu biodisponible. De manera similar, Hamid et al (2018) evaluaron doce enmiendas (solas y mixtas) para la inmovilización de Cd en el sistema de cultivo de arroz-trigo y encontraron una disminución relativamente mayor en la absorción de la planta por la adición combinada de estiércol.…”