Abdolmotalleb Seyyed Mohammadi; Ghorban Asgari; MohammadTaghi Samadi; Ali Pour Mohammadi; Ali Faramarzi Govhar
Volume 22, Issue 4 , September and October 2015, , Pages 571-580
Abstract
Background and aim: Humic Acid (HA) is one of the polyelectrolyte compounds which cause many problems in water treatment process. In present study, UV/IO4- as a novel advance oxidation process, was used for removing HA. Material and methods: In present research, a batch reactor in lab scale was used.This ...
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Background and aim: Humic Acid (HA) is one of the polyelectrolyte compounds which cause many problems in water treatment process. In present study, UV/IO4- as a novel advance oxidation process, was used for removing HA. Material and methods: In present research, a batch reactor in lab scale was used.This reactor with useful volume of 2.5 L, made of stainless steel, which equipped with a low pressure Hg vapor lamp. In this study the effect of some parameters including pH, initial HA concentration, IO4- concentration and Fe (0) nanoparticles concentration were investigated. HA concentration was determined using Spectrophotometer at an absorbance wavelength of 254 nm. Results: According to the results, pH 3, periodate concentration 125 mg/L and Fe (0) Nano particles 12.5 mg/L were determined as optimum conditions. Moreover, results indicated that in presence of UV coupled with Periodate removal efficiency of HA increased to 66.08%, and the increase of Fe (0) Nano particles can led to increase HA removal (73.3%). Conclusion: Results show thatthe presence of UV letto increase in the activation of periodate, on the other hands, the presence of Fe (0) Nano particles led to further activation of periodate subsequently cause the increasing HA removal.
Mona Masoudi; Alireza Davoodian; Mehdi Pajoohesh; Fahimeh Mircholi; Mohammafata Mirsoleimani; Marziyeh Keihanpanah
Volume 22, Issue 2 , May and June 2015, , Pages 516-522
Abstract
Background & Objectives: Limitation of water resources and probability increase of waters pollution resulted from human activities have leaded intensification of control plans for quality of waters. Excremental pollution of water resources is one of substantial problems which their recognition is ...
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Background & Objectives: Limitation of water resources and probability increase of waters pollution resulted from human activities have leaded intensification of control plans for quality of waters. Excremental pollution of water resources is one of substantial problems which their recognition is of great importance in preventing epidemic digestive microbial diseases.
Materials & Methods: For the purpose of conducting study and determining the quality of waters in wells and springs existing in north-west area of Eghlid, sampling was performed from 10 wells and springs in north-west of Eghlid in July 2013 and March 2014, and the water samples of this region were assessed respecting to existed indexes of coliform.
Results: The results showed that the microbial pollution of springs in July was rather than March. Also, the results indicated that average coliform existing in springs was more than the world standards, and some of the springs did not have appropriate quality, so that 10% of samples had coliform pollution, which were related to Ghormas-Beigi spring, and 10% of samples had non-coliform microbial pollution, which were related to Hosseinak aqueduct.
Conclusion: The reason for further average of coliform in springs, in comparison to the world standards, is the pollution of springs with different types of human and bestial sewages which are resulted from the residency of nomads and farmers in the environment of springs.