background and purpose: azo dyes including direct blue 71 (db71) are toxic, mutagenic and carcinogenic contaminants in effluents of industries. this study aimed to investigate the adsorption of db71 from aqueous solution onto pistachio hull waste (phw) as a low-cost adsorbent. materials and methods: a series of experiments were performed via batch adsorption technique to examine the effect of t...

introduction: textile industries produce large volume of colored dye effluents which are toxic and removal of dyes from wastewater is a significant environmental issue. advanced oxidation process (aops) is alternative method for the complete degradation many organic pollutants. zno and tio2 are important photocatalysts with high catalytic activity that have attracted much research attention. ma...

. the sonocatalytic activity of nano-sized zno powder was studied via the degradation of the direct blue 71 azo dye. the nano-sized zno powder that was selected was the same as that which was synthesized and characterized in our previous study. the influences of six operational parameters including the initial ph, the initial concentration, the dose of sonocatalyst, the ultrasound frequency, th...

1- introductionthe presence of synthetic dyes in water and wastewater causes toxicity to aquatic life and bacteria and changes the brightness, color and clarity of the water. common treatment methods for these compounds are not capable of complete mineralization. therefore, new methods are needed to maximize the efficiency. among them, advanced oxygen processes (aops), especially photocatalytic...

conclusions the c genotype should be considered as the prevalent ev71 circulating genotype in iran, particularly in cases of aseptic meningitis. patients and methods viral rna was extracted from 170 cerebrospinal fluid samples obtained from children aged under 8 years with a primary diagnosis of aseptic meningitis. specific ev71 pcr was conducted to identify the genotype of the detected ev71 vi...