Fixed bed adsorption of toxic metal ions such as chromium is a research area current interest. Mathematical models are routinely used to summarize breakthrough results ions, which often display varying degrees curve asymmetry. This work introduces the Weibull function simple model for correlating asymmetric curves chromium. The similar widely Bohart-Adams in several aspects. For example, they b...

Excessive use of nitrogen fertilizers has increased nitrate concentrations in groundwater, which poses a health hazard from nitrate-contaminated drinking water and contributes to eutrophication. Nitrate removal systems been carefully studied; However, new, low-cost solutions are urgently needed. Clay terracotta minerals commonly used environmental applications due their non-toxicity, global ava...