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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Adsorption,Nickel,Cadmium,Dendrimer
- چکیده:
- چکیده انگلیسی: Numerous heavy metals such ascadmium and nickel are toxic present in industrial wastewater and could cause severe damage to living organisms. These compounds are considered to be common contaminants, which are discharged into water resources and cause major environmental problems. Due to the excessive toxicity of heavy metals even at low concentrations, they also threaten human health. Therefore, it is essential to remove these elements from wastewater before discharge into the environment. The present study aimed to evaluate the adsorption of cadmium and nickel from aqueous solutions using poly (propyleneimine) (PPI) dendrimer, as well as the influential factors such as pH, PPI dosage, and the initial concentration of cadmium and nickel using a batch model. To assess the mechanism of adsorption and calculate the maximum adsorption values, the Langmuir and Freundlich isotherms were used. The findings indicated that increased pH and adsorbent dosage improved the removal efficiency. In contrast, increased heavy metal ion concentrations decreased the adsorption. According to the dynamic light scattering analysis, the mean diameter of the PPI dendrimer was 1-10 nm, and the maximum adsorption of both heavy metal ions occurred at the pH of seven. In addition, the maximum uptake of cadmium and nickel was attained with the adsorbent dosage of 0.08 g/l. The maximum removal capacities of the PPI dendrimer for nickel and cadmium were estimated at 1,428 and 1,225 mg/g, respectively.
- انتشار مقاله: 15-02-1397
- نویسندگان: Roya Ebrahimi,Bagher Hayati,Reza Rezaee,Behzad Shahmoradi,Mahdi Safari,Shivaraju Harikaranahalli Puttaiah,Afshin Maleki
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Biomonitoring,Breast milk,Marivan,Nursing Women,Organochlorine pesticides
- چکیده:
- چکیده انگلیسی: The present study aimed to assess the levels of organochloride pesticides (OCPs) in the human breast milk obtained from the nursing women admitted for delivery to a hospital in Marivan county, located in Kurdistan, Iran. Milk samples were collected from 30 women. Gas chromatography analysis was performed using a Dani 1000 (Italy) gas chromatograph equipped with the Ni electron capture detector (ECD). The findings showed the high concentrations of OCPs in the samples. On the other hand, DDTs were ranked as the most abundant OCPs, followed by HCHs and HCBs, with the concentrations estimated at 2,345, 2,617, and 570 ng/g lipid/wt, respectively. Therefore, it could be concluded that the tested women might have been exposed to OCPs. However, further investigation is required on larger sample sizes to take proper measures.
- انتشار مقاله: 19-08-1397
- نویسندگان: Behzad Shahmoradi,Afshin Maleki,Shadi Kohzadi,Jamshid Khoubi,Shiva Zandi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Doping,nanoparticle,Zinc oxide,Hydrothermal Synthesis,Semiconductor,Tungsten-Doped ZnO
- چکیده:
- چکیده انگلیسی: Hexagonal-structured zinc oxide (ZnO) is a semiconductor material with various industrial and cosmetic applications. Some of the main limitations of ZnO are aggregation, poor dispersibility, and wide energy gap, which limit its efficiency in some applications. The present study aimed to synthesize tungsten (W)-doped ZnO nanostructures using a hydrothermal method and characterize the particles to discover their application potency in various fields. To do so, 0.5%, 1.0%, and 2.0% of tungsten oxide (WO) were incorporated into the structure of ZnO, and the properties of the particles were determined via SEM, XRD, FTIR, AFM, DLS, and UV-Vis spectroscopy and zeta potential analysis. According to the obtained SEM images and XRD patterns, the prepared particles possessed hexagonal, non-aggregated structures. Furthermore, the UV-Vis spectra and AFM micrograms indicated that the doping of the ZnO nanostructures with tungsten caused a spectral shift in the absorbance of ZnO nanoparticles from the UV region to the visible light spectrum, increasing their relative roughness. According to DLS analysis, doping decreased the particle size of ZnO. In general, our findings demonstrated that the doping of ZnO nanostructures with tungsten could promote their efficiency and applicability in the treatment of environmental pollutants.
- انتشار مقاله: 12-03-1397
- نویسندگان: Yahya Zandsalimi,Behzad Shahmoradi,Saeed Dehestani Athar,Afshin Maleki
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Adsorption,Clinoptilolite,Direct Red 23,Acid Modification
- چکیده:
- چکیده انگلیسی: Dyes are an important class of pollutants which when discharged into water resources can be toxic to the aquatic environment and cause serious problems for public health. Various treatment technologies such as adsorption are in use. For this reason, clinoptilolite was used as a low-cost adsorbent to remove color from aqueous solution. Clinoptilolite was modified with sulfuric and phosphoric acids in order to adsorp aqueous direct red 23. The batch adsorption experiments used dye concentrations ranging from 50 to 200 mg/L. Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), and Fourier transform infrared spectra (FTIR) were used to determine properties of clinoptilolite. To evaluate the experimental data, adsorption isotherms and kinetics were studied. The results showed that experimental data followed both Langmuir and Freundlich isotherms, with a correlation coefficient of 0.95–0.99. Kinetic studies showed that adsorption followed pseudo first-order kinetics. The adsorption results showed that acid-modified clinoptilolite with maximum adsorption capacity of 0.0009 mmol/g was a superior adsorbent compared with unmodified clinoptilolite, according to Langmuir equation. It caused adsorption efficiency in terms of Si/Al ratio 7.5 after 200 min of contact of between 31% to 60%. According to the Dubinin-Radushkevich isotherm model, mean free energy of adsorption (8.2–8.9 kJ/ mol) means that adsorption might follow a weak chemisorption mechanism. We conclude that adsorbing properties of clinoptilolite, a cheap and abundant adsorbent, can be improved and used for removing dyes from wastewater.
- انتشار مقاله: 01-03-1397
- نویسندگان: Roya Ebrahimi,Afshin Maleki,Behzad Shahmoradi,Reza Rezaee,Hiua Daraei,Mahdi Safari,Yahya Zandsalimi,Pegah Bahmani,Shivaraju Harkaranahalli Puttaiah
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Water,corrosion,GIS,Scaling
- چکیده:
- چکیده انگلیسی: Corrosion is a physicochemical reaction occurring between the metal and its surroundings, which usually has an electrochemical nature and results in changes in the properties of the metal. The corrosive water dissolves the pipe’s material during flowing and this causes many problems. This study investigated the potential of corrosion and scaling of 46 water supply resources in the villages of Sarvabad, west of Iran during high-water (HW) and low-water (LW) periods. Parameters including pH, temperature, alkalinity, calcium hardness, and total dissolved solids (TDS) were measured and the Langelier, Rayznar, Aggressive, and Puchorius indices were calculated using the data collected. The zoning maps for the indices were prepared using ArcGIS (Ver. 9.3) software. The results showed that the mean value and standard deviation for the Langelier index were 0.23 and 0.28, respectively, while for the Rayznar index, they were 7.12 and 1.18, respectively. The values for the Aggressive index and Puchorius index were 11.6 and 1.84, and 7.03 and 1.45, respectively. The Langelier index in some water supplies showed a tendency to dissolve calcium carbonate, and meanwhile in some areas it tended to precipitate calcium carbonate. Moreover, based on the Rayznar index value, water potential for corrosion increases in steel pipes; based on the Aggressive index, the potential for corrosion is medium, whereas based on the Puchorius index, there is a potential for corrosion. A brief description about the zoning maps is also given.
- انتشار مقاله: 24-06-1396
- نویسندگان: Seiran Shahmohammadi,Asadollah Noori,Shafieh Karami,Ata Amini,Behzad Shahmoradi,Soheil Sobhan Ardakani,Seung-Mok Lee,Radheshyam Pawar
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Air pollution,Cardiovascular disease,PM10,Respiratory disease
- چکیده:
- چکیده انگلیسی: One of the air pollutant indices includes particulate matter with aerodynamic diameter less than or equal to 10 μg/m3 (PM10). Particulate matter has extensive effects on the respiratory and cardiovascular systems. Dissemination of such particles for a longer period can lead to increased mortality and hospitalization. In this study, the data of PM10 pollutant were gathered from the Kurdistan Department of Environment. Furthermore, PM10 effects on the total mortalities, cardiovascular mortalities, respiratory mortalities, and hospitalizations caused by respiratory and cardiovascular diseases were analyzed using AirQ software. The results reported the highest mean concentration of PM10 in 2014. This software predicted a total death toll of 57, 60, 57, 51, and 55 cases per 100,000 people during 2010–2014, respectively. Moreover, it was estimated that 3.4, 8, 1.2, 10.8, and 11.5 percent of all deaths could be attributed to the concentrations >20 μg/m3 of PM10. Due to the lack of suitable database for recording death toll attributable to air pollutants, this software could be considered as an alternative for estimating the health effects of air pollutants.
- انتشار مقاله: 14-10-1395
- نویسندگان: Shadi Kohzadi,Ata Amini,Behzad Shahmoradi,Shahab Mohammadi,H.P. Shivaraju
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Water,Arsenic species,ICP-AES,Total arsenic,Babagorgor fountain,SDDC
- چکیده:
- چکیده انگلیسی: Since Babagorgorfountain in the Ghorveh city of Kurdistan province is located in the arsenic belt of Iran, to raise awareness about the quality of drinking water from this fountain the concentration of arsenic and other heavy metals as well as other physicochemical parameters were investigated to protect the public health. In this study, water samples were collected from Babagorgorfountain. Arsenic in the water was measured by field and laboratory methods. Its concentration was estimated to be more than 500 ppb in a field method and 596 ppb in a SDDC method with absorbance measurements at 520 nm. The SDDC method can measure arsenic species separately and the concentration of arsenite and arsenate were found to be 239 and 357 ppb, respectively. Other physiochemicalparameters and heavy metals in the fountain water were evaluated according to standard methods. According to the World Health Organization guidelines the maximum safe level of arsenic in drinking water is 10 ppb. The concentration of arsenic in this fountain’s water is estimated at 60 times the limit and therefore its use is very dangerous for public health.
- انتشار مقاله: 13-06-1396
- نویسندگان: Mohammad Ahmadi Jebelli,Afshin Maleki,Mohammad Ali Amoozegar,Enayatollah Kalantar,Behzad Shahmoradi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Sanandaj,GIS,noise,sound pressure level,parks
- چکیده:
- چکیده انگلیسی: It is accepted that noise pollution has a major impact on health, such as physical, physiological, psychological and performance related effects, all over the world. This study aims to evaluate noise pollution in four urban parks located in Sanandaj City, Iran and to zone it in GIS environment. Sound pressure level (SPL) and maximum sound level (Lmax) were measured at 45 points (each point was measured in a duration of 1 min) spread throughout the parks. The measurement of SPL alongside Lmax was performed using a sound-level-meter TES-1351A. Location of measuring points was recorded using GPS. The noise pollution was found to be more than 50 dB (A) during the day and 40 dB (A) at night, which are within the prescribed standard level for commercial-residential-recreational zones by Iran National Environmental Standards. The Lmax of Amirieh, Koodak, IT, and Maolavi parks were 73.3, 74.31, 74.88, and74.79 dB (A), respectively. Moreover, the SPL of Amirieh, Koodak, IT, and Maolavi parks were 56.99, 60.27, 59.47, and 60.93 dB (A), respectively. Amirieh Park had the lowest Lmax and SPL due to high cover vegetation and lack of high road traffic, whereas the other three parks showed the maximum amount of Lmax and SPL due to the surrounding traffic routes. Improving the parks acoustic conditions through noise insulation using green barriers decorated with plant material can be considered as effective method in order to decrease noise to acceptable level in all the parks.
- انتشار مقاله: 07-06-1395
- نویسندگان: Asad Nouri,Behzad Shahmoradi,Ebrahim Darvishi,Mostafa Gholami,Sahar Hajimirzaie,Omid Nasri,Omid Khoshsoorat,Rizan Ghaderi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Arsenate,Nanocomposite,Membrane,Drinking Water
- چکیده:
- چکیده انگلیسی: Terms and conditions of current drinking water quality standards, including reducing the maximum arsenic concentration from 50 μgl-1 to 10 μgl-1 and predicted stricter standards in future, reveals the necessity for development of new technologies. This study aimed to prepare and evaluate a new nanocomposite membrane using graphene oxide (GO) thin layer to remove arsenic (v) from water. To fabricate the membrane, initially GO was prepared using the modified Hummers' method and then to gain a narrow-dispersed GO dispersion, several times centrifugation and sonication were performed. Then resultant dispersed GO was coated on a microporous flat-sheet polyethersulfone support by coating/deposition and vacuum filtration process. Performance of the synthesized membrane was assessed using a dead end filtration system. The results showed that pure water flux decreased as the coated GO thickness increased. Among the three prepared membranes, the greatest flux was attributed to M1 membrane with the value of 398.5 lm-2h-1 and the minimum flux was for M3 with a value of 131.3 lm-2h-1 at 4 bar of pressure. Furthermore, by increasing the coated GO, rejection of arsenate ions increased significantly. With initial concentration of 1000 ± 20 μgl-1, percentage of arsenate rejection for M1, M2 and M3 membranes were 41.8%, 73.5% and 86.7%, respectively. Relatively high removal by this novel membrane can be due to the exceptional properties of GO nanostructure and the presence of hydrophilic functional groups.
- انتشار مقاله: 03-12-1394
- نویسندگان: Reza Rezaee,Simin Nasseri,Amir Hossein Mahvi,Ali Jafari,Mahdi Safari,Behzad Shahmoradi,Mahmood Alimohammadi,Mohammad Khazaei,Mohammad Maroosi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Iran,Water,Phosphate,Spatial analysis,Groundwater,decision-making
- چکیده:
- چکیده انگلیسی: The purpose of this study was to evaluate the spatial changes of groundwater phosphate concentrations using geostatistical methods based on data from 10 groundwater wells. One of the conventional tools in decision making on the groundwater management is geostatistical method. To evaluate the spatial changes of phosphate concentrations in groundwater, the universal kriging method with cross-validation was used for mapping and estimating groundwater phosphate concentrations in Eyvan Plain, Iran. Phosphate concentration followed a log-normal distribution and demonstrated a moderate spatial dependence according to the nugget ratio (60%). The experimental variogram of groundwater phosphate concentration was best-fitted by a spherical model. Cross-validation errors were within an acceptable level. According to the spatial distribution map, phosphate pollution in the groundwater occurred mostly in the west of the plain because of the phosphate discharge from the industrial effluents.
- انتشار مقاله: 03-12-1394
- نویسندگان: Milad Ahmadi,Behzad Shahmoradi,Maryam Kiani-Sadr
- مشاهده