Work

Cadmium sulfide (CdS) nanoparticles and Cd2+ accumulated by Portulaca oleracea L. using a hydroponic system: Constructed wetland perspective

Year: 2024

Type: article

Abstract: To identify cadmium sulfide nanoparticles (CdS NPs) and Cd hyperaccumulators for Cd-contaminated waters. A potential species of constructed wetland plants ( P. oleracea ) was examined for their CdS NPs and Cd ions tolerance and accumulation. This study evaluated the P. oleracea life traits response, Cd accumulation, bioaccumulation factor (BCF), and translocation factor (TF) to assess their abilities to absorb and accumulate Cd. P. oleracea demonstrates high tolerance to both CdS NPs and Cd stress, with no significant effects observed on biomass, leaf color, plant height, or root length. High accumulation of Cd was noted in plant tissues, with higher Cd in the roots than in the stems and leaves. The Cd levels in plants subjected to CdS NPs were higher than those in the Cd treatment group. CdS NPs aggregates were identified within the plant cells in root and shoot tissues using transmission electron microscopy (TEM). The BCF values ranged from 6.96 to 548.10 for the Cd treatment and 12.91–499.66 for CdS NPs, indicating the ability of P. oleracea to accumulate Cd and NPs. Additionally, TF values for Cd at 0.05 and 0.1 mg/L were above 1, showing effective translocation capability. The findings suggest that P. oleracea demonstrates significant potential as a Cd-hyperaccumulator, exhibiting a robust ability to extract Cd and CdS NPs from contaminated waters. It is a feasible plant in a constructed wetland for Cd removal. • No effect on measured life traits on P. oleracea under exposure to Cd and CdS NP. • Cd could accumulate in various plant tissues. • Cd uptake from CdS NP was higher than that from Cd ion exposure. • Elevated BCF and TF values confirms the potential use of P. oleracea in remediation of Cd.

Source: Ecotoxicology and Environmental Safety

DOI: 10.1016/j.ecoenv.2024.117575

Authors: Hameed Ullah, Yanqing Sheng

Institutions: Chinese Academy of Sciences, Yantai Institute of Coastal Zone Research, University of Chinese Academy of Sciences

Language: English

Topic: Heavy metals in environment

Subfield: Pollution

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $2,990