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Showing 5 results for Zarrabi
Mechanism and Removal Efficiency of C.I. Acid Blake 1 by Pumice Stone Adsorbent
M.r Samarghandi, M Noori Sepehr, M Zarrabi, M Norouzi, F Amraie,
Volume 3, Issue 4 (8 2011)
Abstract

Backgrounds and Objectives: Treatment of colored wastewater is one of the important challenges of environmental engineers. Adsorption process is a key option for removal of organic matter from wastewater. The aim of present work was to investigate pumice stone as an adsorbent for removal of Acid Black 1 from aqueous solution.
Materials and Methods: Removal of Acid Black 1 by pumice stone was investigated. Acid Hyrdo Chloric(HCL) 1 N was used to increse adsorbent porosity. Various parameters such as pH, initial dye concentration and contact time were studied.
Results: Results showed that removal of Acid Black 1 was increased by increasing of contact time and initial dyeconcentration although it was decreased by increasing of pH. Experimental data was best fitted to Longmuir isotherm model (r2>0.98). Study of diffusion model revealed that intraparticle diffusion is rate-controlling step in removal of Acid Black 1 by pumice stone.
Conclusion : The results indicated that pumice stone was a dominant adsorbent for Acid Black 1 removal.


Removal of Cyanide from Aquatic Solution by Using of  Iron and Copper Powder: Equilibrium and Kinetic Study
M Shirzad Siboni, M.r Samarghandi, M Farrokhi, H Piri Dogahe, M Zarrabi,
Volume 4, Issue 3 (1 2011)
Abstract

Background and Objectives: Industrial wastewater included the cyanide is one of the important sources of environmental pollution which founded in Industrial wastewater which are harmful for human health and environment. Therefore, the purpose of this research that was fundamental designed is investigation of Removal of cyanide from aquatic solution by using of iron and copper powder in experimental scale.
Material and Methods: At first, pilot was designed. Then, acquired pH optimum equal to 2,7 for copper and iron by variation pH= (2,4,6,8,12) and constant other parameters. The effect of initial cyanide concentration (40,60,80 mg/l), initial iron and copper dosage (0.08-1 g/100CC) and contact time (15-12 min) studied at the constant of optimum pH. 
Results: The result showed removal efficiency Increased from 46.6% to 90.56% and 31% to 93.78% for copper and iron by increasing of contact time from 15to 120 minute in constant conditions, respectively. Also result showed Removal efficiency decreased and increased by increasing initial cyanide concentration and initial iron and copper dosage. The results showed equilibrium data were explained acceptably by Langmuir isotherms and kinetic parameters were obtained by application of Langmuir&Hinshelwood equation.
Conclusion: The results showed that removal of cyanide can be quick and effective done by iron and copper in experimental scale.


.Investigation the  Zero-Valent Iron (ZVI) Performance in the Presence of UV light and Hydrogen Peroxide on Removal of Azo Dyes Acid Orange 7 and Reactive Black 5 from Aquatic Solutions
Mansur Zarrabi, Ali Reaza Rahmani, Mohammad Reza Samarghandi, Fatemeh Barjasteh Askary,
Volume 5, Issue 4 (15 2013)
Abstract
A MicrosoftInternetExplorer4 Background and Objectives: Colored wastewaters are known as one of the most important sources of environmental pollutants. Having toxic chemicals and aesthetic problems has made treatment of these wastewaters very crucial. So far a number of methods such as electrochemical treatment, coagulation and flocculation, and adsorption have been used for treatment of textile industries wastewater. Hence,  the efficiency of zero-valent iron powder in the presence of UV light and hydrogen peroxide to remove Acid Orange 7 and Reactive Black 5 from the synthetic solutions was investigated.
Materials and Methods: Conducting all experiments in a batch reactor, we examined different parameters including initial concentration of the color (25, 50, 75 mg/L), contact time (30,  60, 120 min), pH (3, 7, 11), the amount of iron powder (0.6, 1.3,  2  g/l), and hydrogen peroxide concentration (10, 15, 20  ml/l).
Result: The results showed that dye removal efficiency was increased by increasing contact time, the amount of iron powder and hydrogen peroxide concentration. On the other hand, with the increasing pH and initial concentration of dye, removal efficiency decreased in both AO7and RB5 dyes.
Conclusion: We found that the integrated ZVI/UV/H2O2 method has  high efficiency in removing azo dyes Acid Orange 7 and Reactive Black 5.


The effect of vehicular air pollution on leaf anatomical characters of some fruit-bearing trees (Case study: traditional Qazvin gardens)
M Ghannadnia, Mm Zarrabi, N Habibi,
Volume 12, Issue 4 (2-2020)
Abstract
Background and Objective: Air pollution, especially the portion related to Motor vehicles, is a serious problem in many heavily polluted areas in the world. This investigation was conducted to study the effects of the air pollution on the anatomical structure of leaf in some valuable fruit-bearing trees in Traditional Qazvin gardens.
Materials and Methods: In this study, 72 leaf samples were randomly collected from the contaminated and control areas from traditional Qazvin gardens in 2018. Three leaves of each sample were selected randomly and were submerged into the fixative solution. Then the samples were sliced using a microtome after embedding in the paraffin. Staining was carried out with hematoxylin and eosin. Measurements at cellular levels were performed by Image J. Data were analyzed by SPSS 16 software. Comparison of the means was done by Duncan's test and the charts were drown using Excel.
Results: The thickness of the lower cuticle of the main leaf's vein was significantly increased in both plants. The leaf thickness and length of palisade parenchyma in the polluted areas were increased in Juglans regia in comparison to Pistacia vera. In addition, the resin duct's diameter of the leaves of the P. vera was significantly decreased as compared with those of the control areas.
Conclusion: The results revealed some of the negative effects of air pollution on the anatomical structure of the leaves, and on several various resistance mechanisms of them. In conclusion, the metabolism of the plants can be affected by air pollution and consequently their consumers health may be at risk.

A study on the performance of the wastewater treatment plant in Charmshahr industrial estate and the potential of reuse for effluent and disposal sludge
Narges Arab Ameri, Hatam Godini, Mansur Zarrabi, Mohammad Darvishmotevalli,
Volume 17, Issue 4 (3-2025)
Abstract
Background and Objective: Wastewater produced in industrial estates is crucial to address due to the wide range of pollutants it contains. The objective of the present study was to investigate the performance of the Chamshahr Industrial Estate Wastewater Treatment Plant for effluent and sludge reuse.
Materials and Methods: In this descriptive and comparative study, the quality of raw industrial wastewater, effluent, and sludge from the wastewater treatment plant of the Chamshahr Industrial Estate was investigated over three periods at monthly intervals. Additionally, archival quality data for wastewater, effluent, and sludge from 1402 to 1403 were analyzed. The results were compared with the standards and guidelines of Iran, WHO, FAO, USEPA, and others. The wastewater treatment method employed a combination of chemical sedimentation and aerated lagoons with return sludge.
Results: The volume of wastewater produced in this industrial estate was 15,000 m³/day, primarily originating from leather and tanning industries (6,100 m³/day), which exhibit high pollution intensity. The treatment plant's efficiency in removing BOD, COD, and TSS was 62±24%, 72±19%, and 84±13%, respectively. However, due to the concentration of heavy metals, such as chromium in the wastewater (0.28 mg/L) and sludge (353.5 mg/L), the treatment method was unable to meet existing standards and guidelines. Furthermore, the salt content in the effluent (43,300 mg/L) and sludge (202,000 mg/L) was excessively high, rendering it unsuitable for disposal or reuse without further treatment.
Conclusion: The performance of the wastewater treatment plant fails to meet the standards and guidelines for environmental discharge and the reuse of effluent and sludge. Therefore, the final effluent and sludge require additional treatment to enable reuse and prevent environmental pollution.
 

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