Food safety is a major concern for the Chinese public. This study collected 465 published papers on heavy metal pollution rates (the ratio of the samples exceeding the Grade II limits for Chinese soils, the Soil Environmental Quality Standard-1995) in farmland soil throughout China. The results showed that Cd had the highest pollution rate of 7.75%, followed by Hg, Cu, Ni and Zn, Pb and Cr had ...

Cadmium and lead are potential heavy metal environmental pollutants. Cadmium is used in metal coating, paints, enamels, plastics, stabilizers of PVC, nickel-cadmium batteries, solders, low melting alloys, production of semiconductor and photovoltaic devices (Peterson and Allowy, 1979). Lead comes from printing industry plastics plaster, paint and batteries (Haley, 1968). Most of the investigati...

This paper motivates the use of automatic heavy-weight static analysis tools to find bugs in C (and C++) code for safety-critical embedded systems. By heavy-weight we mean tools that employ powerful analysis to cover all cases. The paper introduces two automatic and relatively heavy-weight tools that are currently employed in the automotive industry, and depicts their underlying techniques, adv...

Jarosite waste, originating from zinc extraction industry, is considered hazardous due to the presence and the mobility of toxic metals that it contains. Its worldwide disposal in many tailing damps has become a major ecological concern. Three different methods, namely modified Synthetic Precipitation Leaching Procedure (SPLP), three-stage BCR sequential extraction procedure and Potential Ecolo...

background: today, through various industrial processes, toxic heavy metals are released into aquatic environments that are harmful to the ecosystem. in the present investigation, removal of such contaminants from industrial wastewater is necessary. the purpose was made to extend an ecofriendly technology by using a bio carbon generated from sunflower waste biomass. methods: the impact of initi...

abstract in order to investigate the removal of copper, nickel, zinc and chromium from industrial waste water by a sand–soil–organic matter filter column, this experiment was conducted at a completely randomized design with sixteen treatments and four replications. p.v.c tubes (columns) with 66.5 cm height and 10 cm diameter were chosen and filled from down to top by coarse gravel (15 cm), sand...