The experimental study of Cr6+ contaminated water remediation by zero-valent nano-Fe

Abstract

In recent years, researchers have developed a number of new types of zero-valent nano-Fe remediation materials applied in the remediation of contaminated soil and water, which has attracted wide attentions. This paper selected soil leaching wastewater severely contaminated by chromium as target of the study and chose zero-valent nano-Fe, [Formula: see text] and [Formula: see text] for comparison experiments to study the effects on removing [Formula: see text] under experimental conditions of different pH values, dosages and reaction times. As is shown in the experiments, zero-valent nano-Fe has the highest removal rates for [Formula: see text], while the reaction of [Formula: see text] is the slowest under the same conditions. However, both removal rates are prone to be stable after 10 min. Dosages do not make a distinct difference and the pH value has the least effect on the repair of zero-valent nano-Fe.