Microplastics influence the adsorption and desorption characteristics of Cd in an agricultural soil

Zhang, Shuwu; Han, Bin; Sun, Yuhuan; Wang, Fayuan

doi:10.1016/j.jhazmat.2019.121775

Cited by 212 publications

(37 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the future, long-term and large-scale studies should be performed on the interactions of MPs and heavy metals in agroecosystems, particularly in food crops, to ensure food safety. Second, because the impacts of MPs usually vary greatly with plastic type, particle size and shape, and surface characteristics [19,20,41,45,46], further research should focus on the ecotoxicity of more MPs, particularly nanoscale plastics and aged MPs, and their associated contaminants. Third, PS produced stronger impacts on Cd bioavailability and plant growth than HDPE.…”

Section: Discussionmentioning

confidence: 99%

“…Cd accumulation by plants is dependent on soil Cd content and availability, soil characteristics, and plant traits [31], which can all be influenced by MPs. First, MPs can decrease the Cd adsorption capacity of soil [19]. The co-occurring MPs may increase Cd bioavailability and Cd uptake by plants.…”

Section: Concentration and Uptake In Plantsmentioning

confidence: 99%

“…Due to their relatively simple components and surface structure compared to soil constituents, MPs generally have a highly hydrophobic surface with a much lower adsorption capacity for heavy metals [17,19]. Our previous study found that HDPE MPs reduced soil adsorption for Cd but elevated the desorption rate of the adsorbed Cd [19], implying that co-occurring MPs may enhance the release of exchangeable Cd from sorption sites. Thus, the presence of MPs may increase Cd exchangeability and attenuate soil retention of Cd via a "dilution effect".…”

Section: Dtpa-extractable CD In Soilmentioning

confidence: 99%

“…In particular, MPs can adsorb metallic contaminants and thus serve as a vector for carrying the metals into organisms [17,18]. Our previous studies found that Cd adsorbed onto high-density polyethylene (HDPE) MPs was easily desorbed [18], and the presence of HDPE MPs decreased Cd adsorption but increased desorption of Cd by soil [19]. Nevertheless, how MPs influence the biological effects of heavy metals such as Cd in plant-soil systems remains unknown [16].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Wang

Zhang

et al. 2020

Toxics

Self Cite

137

View full text Add to dashboard Cite

Microplastics (MPs) occur widely in terrestrial ecosystems. However, information on the interaction of MPs with metals in terrestrial ecosystems is lacking in the literature. The present study investigated the effects of two types of MPs (high-density polyethylene (HDPE) and polystyrene (PS)) with different dosages (i.e., 0, 0.1%, 1%, and 10%) on the uptake and effects of Cd in maize plants grown in an agricultural soil. Results showed that addition of Cd at a 5 mg/kg caused inhibited plant growth and resulted in high Cd accumulation in plant tissues. Polyethylene alone showed no significant phytotoxic effects, but a high-dose of HDPE (10%) amplified Cd phytotoxicity. Polystyrene negatively affected maize growth and phytoxicity further increased in the presence of Cd. Both HDPE and PS caused soil diethylenetriaminepentaacetic acid (DTPA)-extractable Cd concentrations to increase but did not significantly affect Cd uptake into plant tissues. In the soil without Cd addition, HDPE decreased soil pH, while PS did not significantly alter soil pH. However, in the soil spiked with Cd, both HDPE and PS increased pH. Overall, impacts on plant growth and Cd accumulation varied with MP type and dose, and PS induced substantial phytotoxicity. In conclusion, co-occurring MPs can change Cd bioavailability, plant performance, and soil traits. Our findings highlight the ecological impacts that could occur from the release of MPs into soil.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Concentration and Uptake In Plantsmentioning

confidence: 99%

Section: Dtpa-extractable CD In Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Wang

Zhang

et al. 2020

Toxics

Self Cite

137

View full text Add to dashboard Cite

show abstract

“…E). The detailed characteristics of the two kinds of soil samples were described in our previous studies [7,36]. The soils were first air-dried, then sieved (2 mm).…”

Section: Soil Sample Preparationmentioning

confidence: 99%

Remediation of Cr(VI)-Contaminated Soil by Nano-Zero-Valent Iron in Combination with Biochar or Humic Acid and the Consequences for Plant Performance

Sun

Zheng

Wang

et al. 2020

Toxics

Self Cite

View full text Add to dashboard Cite

Nano-scale zero-valent iron (nZVI) is among the most common nanoparticles widely used for the treatment of various environmental contaminants. However, little is known about the combined effects of nano-zero-valent iron (nZVI) and other soil amendments on soil remediation and plant performance. For the first time, we studied the remediation of Cr(VI)-contaminated soil using bare nZVI (B-nZVI) and starch-supported nZVI (S-nZVI) in combination with either biochar (BC) or humic acid (HA), and the consequent effects on plant growth and Cr accumulation. Both S-nZVI and B-nZVI decreased the contents of Cr(VI) and available Cr in soil, but increased available Fe content, with S-nZVI generally showing more pronounced effects at a higher dose (1000 mg/kg). B-nZVI exerted no inhibition and even stimulation on plant growth, but 1000 mg/kg S-nZVI produced significant phytotoxicity, resulting in decreased plant growth, low chlorophyll content in leaves, and excessive accumulation of Fe in roots. Each nZVI decreased shoot and root Cr concentrations. BC and HA produced synergistic effects with nZVI on Cr(VI) removal from soil, but HA decreased soil pH and increased the availability of Cr and Fe, implying a potential environmental risk. Addition of BC or HA did not alter the effects of either nZVI on plant growth. In conclusion, combined application of 100 mg/kg nZVI and BC could be an ideal strategy for the remediation of soil contaminated with Cr(VI), whereas high-dose S-nZVI and HA are not recommended in the remediation of agricultural soils for crop production or in the phytostabilization of Cr(VI).

show abstract

What Do We Know About the Effects of Microplastics on Soil?

Pinto

Ferreira

Dordio

et al. 2023

Microplastics in the Ecosphere

View full text Add to dashboard Cite

Microplastics influence the adsorption and desorption characteristics of Cd in an agricultural soil

Cited by 212 publications

References 41 publications

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Remediation of Cr(VI)-Contaminated Soil by Nano-Zero-Valent Iron in Combination with Biochar or Humic Acid and the Consequences for Plant Performance

What Do We Know About the Effects of Microplastics on Soil?

Contact Info

Product

Resources

About