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Showing 4 results for Shahbazi
The survey of effective factors on waste generation in Emam Khomaini hospital in Karaj and the analysis of the rate estimation using time series model ARIMA
A Shahbazi, F Bagheri Zonoz, H Aboomaash-Zadeh,
Volume 8, Issue 1 (8-2015)
Abstract

Background and Objectives: Although amount of hospital waste generation is less than urban waste generation, but because of health risks involved, these wastes need to be managed precisely and specifically. Therefore, the purpose of this study was to survey quality and quantity of waste generation in Emam Khomaini Hospital, Karaj, Iran and to estimate its generation process in future. Materials and Methods: the total amount of different waste percentage and its weight were examined and analyzed through monthly sampling from segregated waste (including general, infectious, pharmaceutical, and sharp wastes) in Emam Khomaini Hospital in Karaj during four years (2010-2013). Results: the hospital waste generation rate became double during four years of study. Among different types of waste, the highest monthly averages per bed for general and infectious waste was 48.3 and 46.5% respectively. In addition, the most and least amount of waste generation was observed in April and September respectively. Analysis of variance showed that the increasing trend of waste generation had a significant difference (P<0.001). Moreover, the estimate of waste generation process through ARIMA time series model represented continuation of increasing trend of waste generation up to 6.3 (kg bed-1 day-1) on December 2014. Conclusion: Waste generation in Emam Khomaini’s hospital follows an increase trend ( average generation from 2.98 to 4.44 kg bed-1 day-1 in 2010 to 2012 respectively, reflecting the increasing trend in the waste generation. ARIMA time series model shows that the waste generation rate would be 1.5 fold more in autumn 2014. Estimate of waste generation is necessary for planning and designing of waste management.


The frequency and type of events of Chaharmahal Bakhtyari nomads in the first half of 2014
A Shahbazi, M Falakzadeh, F Shahin, S.h Frahzad Boroujeni, E Mehrabi,
Volume 8, Issue 2 (8-2015)
Abstract

Background and Objectives: Events are the second leading cause of disability and one of the problems that can cause physical and psychological disorders, and in more severe cases lead to death. Therefore, at the first, the risks must be identified, so that one can offer how to confront and eliminate risk. Thus, this study aimed to determine the frequency and type of events among nomads. Materials and Methods: This cross-sectional study was performed on 534 nomad in Chaharmahal- Bakhtiari Province during first half of 2014. The data collection was through interviews based on a predetermined checklist and finally the data gathered were analyzed using SPSS (Ver.19) software and descriptive statistics. Results: It was found that out of 534 nomads, 144 were female (26.97%) and 390 male (73.03%) and age average of them was 26.32±24.12. These people are often faced with 18 types of events in their location or during their shifting the most frequent one is caused by sinking of thorns and sharp rock aggregates in their organs during labor activities (62.46%) and the least frequent one was hurt caused by lightning (0.19%) and electric shock by electrical tower (0.19%). The results showed that there was a significant relationship between sex, season of the year, the summer location, and accident rate (P ≤0.002) but there was no significant relationship between the nomads and clans of the study and event rate. Conclusion: Like many diseases, events are preventable, and this requires the development of knowledge about the principles of safety during migration and housing. Therefore, it seems that for the preserving nomadic population and reducing lost caused by these events, the national event management centers and emergency medical centers should have better planning in this field.


Comparison of adsorption efficiency of Triton X-100 surfactant from industrial wastewater using synthetic and natural zeolites: isotherm and kinetic studies
A Shahbazi,
Volume 8, Issue 3 (12-2015)
Abstract

Background and Objectives: Rapid growing of Triton X-100 application in industries results in its appearance in effluents  and threaten the aqueous ecosystems. Triton X-100 is not biodegradable and can accumulate in food chain.

Materials and Methods: In this study, sorption capacity of six synthesized zeolites with different regular porous structure was studied for triton X-100 (TX-100) surfactant and the results were compared with Clinoptilolite natural zeolite of Damavand region.

Results: Within all zeolite studied, Beta(200) showed the highest sorption capacity (about 575 mg/g), which is due to its regular pore structure with large pore diameter, channel intersections, high SiO2/Al2O3 ratio and high surface area. Langmuir monolayer isotherm and pseudo-second-order kinetic equation could provide well-fitted to the experimental data in simulating adsorption behavior of TX-100 over Beta(200) zeolite.

Conclusion: The adsorption feature was internal sorption and the intraparticle diffusion might be a rate-limiting control for Beta(200) zeolite. Results of experiments demonstrated that the hydrophobic zeolites with large pore diameter such as Beta(200) could be effective sorbents for industrial wastewater treatment features.


Investigating the relationship between the alkalinity of the influent wastewater and the performance of the anaerobic unit of the wastewater treatment plant and providing a solution to increase the alkalinity of the influent wastewater
Abdolmotaleb Seid Mohammadi, Ghorban Asgari, Reza Shokoohi, Parastoo Shahbazi,
Volume 13, Issue 3 (11-2020)
Abstract
Background and Objective: Considering the importance of alkalinity in pH regulation and its buffering role, in this study, the effect of inlet wastewater alkalinity on the efficiency of the anaerobic unit of the wastewater treatment plant. Moreover, a superior chemical compound in providing alkalinity to wastewater was investigated.
Materials and Methods: This study was performed in the treatment plant to determine the relationship between input alkalinity and removal efficiencies of COD, BOD5 and TSS. In order to determine the optimal alkali material for superb anaerobic wastewater performance, four common chemical substances including, NaOH, Na2CO3, Ca(OH)2 and MgO were selected and examined using One Factor At Time (OFAT) test method.
Results: According to the results maximum removal efficiencies were obtained 62, 66.6 and 71.2% for COD, BOD5 and TSS, respectively under alkaline condition of 1260 mg/L CaCO3. Furthemore, the optimal dose to supply one unit of alkalinity by Na2CO3, Ca(OH)2 and MgO were 0.53, 0.54 and 0.3 mg/L, respectively. These values were obtained 5 min contact time and mixing rate of 150 rpm. However, for NaOH the optimal dose supply was obtained 0.35 mg/L for 3 min contact time and mixing rate of 100 rpm.
Conclusion: In conclusion, the performance of anaerobic baffled reactor is highly related to the supply of influent alkalinity to the reactor. In addition, the use of MgO can be considered as a suitable alkaline substance to neutralize acidic wastewater and provide alkalinity for ABR system.

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