Consumption of fermented Cd and Pb contaminated wheat flour increases potential health risk.

Fermentation can increase the availability of heavy metals in wheat flour, however, its effect on the health risk of heavy metal contaminated wheat flour has not been fully investigated. A contaminated wheat flour (Pb = 0.26, Cd = 0.

Long-term nonferrous metal smelting affects metal accumulation/transfer in a soil-plant-woodlouse system.

Nonferrous metal smelting is one of the main sources of heavy metal pollution in the environment, yet its effect on heavy metal transfer in soil-plant-animal systems is not well investigated. In this work, soil, plant (Humulus scandens [HS], Digitaria sanguinalis [DS], and Setaria viridis [SV]), and woodlouse (Armadillidium vulgare) samples were collected in a long-term nonferrous metal smelting area from 26 sites over approximately 7 km and analyzed for Cd, Cu, Mn, Ni, Pb, and Zn concentrations. Cadmium and Pb were the most accumulated soil metals, with mean concentrations of 4.

Investigation of phloem transport of foliar-absorbed Cd in wheat.

The transport pathway of foliar absorbed Cd in wheat has not been clarified. Hydroponically raised wheat seedling stems were steam girdled to disrupt phloem transport, then the leaves were exposed to Cd solutions (40 or 60 mg L) containing 20 mg L Rb (a phloem transport indicator) for 16 h. Plants were harvested 7 days later and divided into roots and leaves, while the stem was divided into two parts above and below the girdling location, with phloem sap collected from the upper part.

Effect of Feeding Mice Soluble Metals and Heavy Metal Contaminated Soil on Feces Metal Concentrations.

The effect of heavy metal availability and interaction in feed on feces heavy metal excretion in mice has rarely been investigated. In this work, feed containing a polluted soil (total Cd = 6.34, total Pb = 387 mg kg) amended with phosphate, bentonite and lime, or feed spiked with soluble Pb and Cd were fed to mice for 10 days.

Cadmium and lead bioavailability to poultry fed with contaminated soil-spiked feed.

Geophagy is common for free-range chickens, however, the relative bioavailability (RBA) of heavy metals in contaminated soils consumed by chickens has not fully investigated. In this work, chickens were fed diets increasingly spiked with a contaminated soil (Cd = 105, Pb = 4840 mg kg; 3, 5, 10, 20 and 30 % of overall feed by weight), or Cd/Pb reagent spikes (from CdCl or Pb(Ac)), for 23 d. After the study period, chicken liver, kidney, femur and gizzard samples were analyzed for Cd and Pb concentrations, and organ/tissue metal concentrations were used to calculate Cd and Pb RBA.

Heavy metal distribution in wheat plant components following foliar Cd application.

Atmospheric deposition of Cd, from anthropogenic activities, can be directly deposited onto and absorbed into wheat plants, yet, how foliar absorbed Cd is translocated in wheat plants is not well understood. A pot experiment investigated foliar Cd application on the accumulation and distribution of heavy metals in various wheat parts. Wheat was grown in a Cd/heavy metal contaminated soil, and from grain heading to the filling stage, 0, 10, 20, 30 and 40 mg kg Cd solution was sprayed repeatedly on leaves (grain heads were covered).

Bioaccessibility, source and human health risk of Pb, Cd, Cu and Zn in windowsill dusts from an area affected by long-term Pb smelting.

Non-ferrous metal smelting results in heterogenous spatial distribution of potentially toxic metals (PTM) near smelters. In this work, windowsill dusts were collected from smelting (SA) and urban (UJ) sub-areas of Jiyuan (a city affected by >70 years of Pb smelting) to investigate PTM source and bioaccessibility. The <10 μm fraction of dusts were analyzed for total and bioaccessible Pb, Cd, Cu and Zn concentrations; bioaccessibility was analyzed by a three-stage assay (i.