Paraoxon is an emerging organophosphate pollutant that commonly used as a pesticide and drug, hence increasing the risk of contamination water supplies. Its intensive use for vector control has led to pollutions in soil water. very toxic, with LD50 2 30 mg/kg rats. It can be metabolized body from parathion; thus, exposure lead serious health effects. In this study, zero valent iron (Fe°/ZVI NPs...

introduction     cadmium as one of the toxic heavy metal, because of harmful effects on health and the environment, has attracted a lot of attention. the main sources of cadmium emissions are the environment, the waste of electroplating, melting, alloyed manufacturing, pigments, plastics, batteries, extraction and refining processes. this metal easily accumulates in different machines of people...

background and purpose:organic dyes with a complex structure are often toxic, carcinogenic, mutagenic, non-biodegradation and stable in the environment and if released to the environment without treatment can endanger the environment and human health. the aim was to evaluate the performance nanoscalezero-valent iron (nzvi) in the removal of dye acid red 18 (ar18) from aqueous solutions. materia...

background contamination of water resources with nitrate is a serious environmental problem in many regions of the world. in addition, this problem has been observed in some regions of iran. as nitrate is threatening for human health and environment, it must be decreased to standard levels in drinking water. objectives the purpose of this research was to model the nitrate removal from water by ...