Iran Occupational Health

  Background and Aims: This is a descriptive and cross sectional study. The aim of this study was to investigate the environmental ranking of industries located at west of Tehran based on the quantitative and qualitative characteristics of industrial wastewaters in 2011.

  Methods: This study was conducted by site visit, questionnaire completion , database production and results analysis. The questionnaire was consisted of 30 questions about quantity, quality and management of industrial wastewater. Total number of industries with over than 50 personnel , was 287 . Class-weighted sampling was used and the sample size was contained 50 industries. In this study, industries were scored from 1 to 10, based on the flow rate, BOD and COD, generation of wastewater per worker per day and then were ranked according to the total score.

  Results: The average flow of wastewater generated by these 50 industries was 9422 m³/day. Wood and cellulose industries with 730 liters wastewater per worker per day was considered as the greatest wastewater generator . Minimum organic loading was related to non- metallic mineral industries with COD of 205 mg/ L and BOD of 85 mg / L . The maximum COD was related to paper industries with the rate of 8800 mg/ L and maximum BOD was related to food and drug industries with the rate of 1536 mg/ L .

  Conclusion: This environmental ranking was indicated that while paper industries contributed the most pollution load, non- metallic mineral industries had the least pollution load.

  Background and aims : Aniline as one of the aromatic amines is a widely distributed environmental pollutant resulting from the manufacture of dye materials and agricultural chemicals such as herbicides. It is frequently used by the industry such as the raw material in the manufacture of dyes, rubbers, pharmaceutical preparation, plastic and paint. It is also a common by product from paper and textile industries. Aniline has been found to distribute in an aqueous environment and interfere with aquatic species life . It is known to be carcinogenic for human and also reacts easily in the blood, thereby preventing oxygen uptake. The purpose of this study is to investigate the performance of electrochemical process for the treatment of a hard biodegradable compound called aniline from synthetic wastewater using iron electrodes in a batch laboratory-scale system.

  Methods: This Experimental study was carried out in a laboratory scale and in a glass reactor. The effect of operating parameters such as voltage, pH, reaction time and initial Aniline concentration on the removal efficiency has been investigated.

  Results: In operational conditions of 10 volts, 100 mg/L of initial Aniline concentration, acidic pH of 5.5 and 1 cm interelectrode distance following 120 minutes, the removal efficiency of aniline and COD were obtained 92% and 60% respectively .

  Conclusion: The results indicated that electrochemical process can be used as an effective method for Aniline removal from industrial wastewater.

Background and aims: Today, using magnetic adsorbents and the subsequent magnetically separation of pollutants is highly considered by researchers due to it’s ease of use, low cost and rapid results. Therefore the aim of this study was the synthesis of a magnetic composite of activated carbon/Fe3O4 nanoparticles (Fe3O4/PAC), and its application as a magnetic adsorbent for simultaneous removal of lead and aniline from industrial wastewater.

 Methods: Physical, surface and morphological features of the adsorbent, as well as, the performance of adsorption process were studied in a batch system by investigating the changes in parameters such as pH, contact time, adsorbent and adsorbate concentrations, and temperature. In order to explain experimental data, Freundlich and Langmuir equilibrium isotherms, in addition to Lagergren, Ho and Elovich kinetic equations were applied.

 Results: Results of this study demonstrated that 90 % of lead and 94 % of aniline were removable by the synthesized adsorbent under the optimal conditions (pH 6, a contact time 60 min and adsorbent dose of 2 g/L). Experimental data from adsorption were better described by both Langmuir and Freundlich isotherm models, and the pseudo-second-order kinetic model.

 Conclusion: According to these results, it can be claimed that Fe3O4/PAC had an effective adsorption capacity for simultaneous adsorption of lead and aniline, and thus, it is recommended