Background and Objective: Colors can cause major environmental pollutions and are responsible for the carcinogenic and mutagenic risks. In this study, single-walled carbon nanotubes have been carried out to determine the efficiency of removal of Acid Orange 7 ( AO7 ) dye from synthetic textile wastewater.   Materials and Methods : In the laboratory study , the color was determined in 484 nm u...

in the present work, a simple and sensitive method was developed for determination of morphine and heroin using gold nanoparticles as resonance rayleigh scattering (rrs) and colorimetric technique’s probe. synthesized gold nanoparticles by sodium citrate reduction method have a negative charge layer on their surfaces because of self-assembled citrate anions on their surface. binding of morphin...

During the TNT production process, raw product includes about 4.5% of asymmetric TNT isomers. In order to use TNT for military purposes, TNT asymmetric isomers should be removed. Purification of crude TNT is done by selite (15% solution of sodium sulfite). Because of its color, the term red-water is used for this wastewater. Different methods including incineration, microorganisms, conversion o...