mohammadreza behrouzikhah

One of the most important environmental pollutants that there is in sewage of different industrials is cyanide to cause pollution of water sources that are dangerous to humans and the environment. Cyanide can be removed in different ways from the aqueous media, but most of these methods are costly. Therefore, the aim of this study is the removal cyanide using iron nanoparticles.

Removal of cyanide from aqueous media using iron nanoparticles in various conditions including the effect of the adsorbent, initial cyanide concentration, contact time and pH were studied in discontinuous phase. In this study, adsorption equilibrium and also the kinetics of the reaction examined.

In the process of sharing discontinuous, the balance was achieved after 120 minutes of contact time and maximum amount of removal cyanide in the pH =11 for cyanide concentration of 2.5 mg/L and 1 gr of nanoparticle over 97% obtained. Also the results showed that the adsorption process fitted with Langmuir isotherm and chemical kinetic fitted with of secondary grade.

According to the findings, iron nanoparticles can be used as a suitable option for removal cyanide from aqueous solution in hazardous waste. Keywords: iron nanoparticles, cyanide, hazardous waste

Background and Thyroid autoimmune disease is the most common thyroid disorder in low-iodine intake areas; evaluation of thyroid peroxidase antibodies (TPOAb), anti-Thyoglubolin (TGAb) and anti-microsomal (TMAb) in most patients with hypothyroidism is of significant importance. Therefore, the present study was conducted to determine the role of anti-thyroid antibodies in patients with hypothyroidism in Sabzevar, Iran. Methods and Materials: This is a cross-sectional descriptive analytical study where 382 subjects with TSH above normal and T3 and T4 below normal were selected through non-probability convenient sampling. Their TSH, TPOAb, TGAb and TMSb were measured through Eliza method. The obtained data were analyzed in SPSS 15 using chi-square, independent t-test and Pearson correlation coefficient, where P<0.05 was considered significant. TPOAb, TGAb and TMSb in men and women with TSH higher than 10 mIU/ml were 72.3%, 78.3% and 50% positive respectively. In 72.3% of the subjects, TPOAb was above normal; in 78.5% of them TMAb was higher, and in 50% of them TGAb was higher. The highest rate of correlation was observed between TGAb and TPOAb (r=0.89). The results indicated that, in the population studied, TPOAb, TMAb and TGAb were higher than the normal rates, and that TPOAb and TGAb are more remarkably changing to higher rates than TMAb.