Chromium (Cr) is a toxic heavy metal that is heavily discharged into the soil environment
due to its widespread use and mining. High Cr levels may pose toxic hazards to plants …

Background Unlike organic pollutants, heavy metals are not created nor are biodegradable
materials. They naturally occur in earth crust and many of them reach the environment via …

Carboxymethyl cellulose/polyethylenimine hydrogel (CMC/PEI) was firstly prepared with a
facile one-step method to enhance Cr (VI) removal. The sufficient hydrogen ions in double …

Metals reach humans through food and drinking water intake and inhalation of airborne
particles and can have detrimental health effects in particular for children. The metals …

Ultramafic soils are in equal parts fascinating and dangerous. Developed on rocks derived
predominately from the Earth's mantle and metamorphosed at the ocean floors, ultramafic …

Cr (VI) from oxidation of geogenic Cr (III) minerals is gradually becoming the primary source
of Cr (VI) in soils and groundwater instead of direct emissions. Thermodynamically, natural …

Chromium (VI) produced from the oxidation of indigenous Cr (III) minerals is increasingly
being recognized as a threat to groundwater quality. A critical determinant of Cr (VI) …

The potential for new US regulations for Cr (VI) in drinking water have spurred strong
interests in improving technologies for Cr (VI) removal. This study examined iron …

Abstract Hexavalent chromium (Cr (VI)) groundwater usually exists in shallow aquifers
related to ultramafic and serpentine formations, but knowledge of the genesis of dissolved …

During the last part of the twentieth century, northern Europe, the south western parts of
Norway and Sweden, suffered from “acid rain”. Sulphur dioxide emissions from combustion …