Influence of plants on the distribution and composition of PBDEs in soils of an e-waste dismantling area: Evidence of the effect of the rhizosphere and selective bioaccumulation

The influence of land use on the concentration and vertical distribution of PBDEs in soils of an e-waste recycling region of South China

“…Polybrominated diphenyl ethers (PBDEs) are a group of halogenated chemicals , that are ubiquitous in the environment (Hassanin et al, 2004;Miglioranza et al, 2013) and are considered persistent organic pollutants (POPs) due to their persistence, toxicity, bioaccumulation, and long-range atmospheric transport (Wang et al, 2014). PBDEs have been intensively used as brominated flame retardants in a wide array of materials over the past two decades, especially in electronic products .…”

“…Previous research has also found that the type of land use can affect the distribution and transfer of PBDEs in surface soils (Wang et al, , 2011a, especially in areas that are cultivated with plants. Plants can either chemically or biologically enhance the degradation of organic pollutants (Baudoin et al, 2003;Rentz et al, 2005), as well as facilitate the transport of those compounds in soil by producing large quantities of dissolved organic carbon, such as sugars, amino acids, and fatty acids (Hodge et al, 1996;Bertin et al, 2003;Wang et al, 2014).…”

Could Uptake and Acropetal Translocation of PBDEs by Corn Be Enhanced Following Cu Exposure? Evidence from a Root Damage Experiment

“…Passive air samplers (PAS), containing a polyurethane foam (PUF) disk (14 cm diameter, 1.2 cm thickness, and 0.035 g/cm 3 ), were used to measure the atmospheric deposition of PBDEs and estimate the evaporation of PBDEs from the soil/ water to air during the entire cultivation period. Two samplers were hung over the ceiling of the greenhouse where the pot and hydroponic experiments were carried out, and another two samplers were placed 400 m away from the greenhouse.…”

“…3 Most previous studies regarding PBDEs focused mainly on their physicochemical characteristics, partitioning equilibrium, toxicity, and environmental fate. 4−7 The uptake and translocation of PBDEs by plants have been studied intensely over the past decade.…”

Spatial distribution and temporal trends of farmland soil PBDEs: processes and crop rotation effects

“…When the crop rotated to autumn peanut in August and the land is turning dry, the PBDEs concentration in farmland soil reached the lowest level which was 8.1 ± 1.2 ng/g dry weight. Many studies showed that PBDEs in water field may be much lower than that in dry field (Cheng et al 2014;Wang et al 2011), and most PBDEs in agricultural soil are accumulated in the rhizosphere area (Wang et al 2014b). But the results of this study showed a trend that the total PBDEs concentration in farmland soil decreased from rice transplanting in April to rice harvesting in August, but increased to a higher level at fallow land period and returned to the highest level in early paddy period when the soil was totally wet at the beginning of the next year.…”