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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Applied Biotechnology Reports
- نوع مقاله: Journal Article
- کلمات کلیدی: Soil,Immobilization,High Molecular Weight Polycyclic Aromatic Hydrocarbons,Crushed Biochar,Pulverized Biochar
- چکیده:
- چکیده انگلیسی: Introduction: Migration and mobilization of recalcitrant organic contaminants such as polycyclic aromatic hydrocarbons (PAHs) in contaminated sites may endanger groundwater resources if considerable amounts of these compounds are mobilized and leached from solid phase into aqueous phase. The aim of the present study was to investigate the influence of biochar in two forms i.e. crushed and pulverized on immobilization and leaching behavior of high molecular weight (HMW) PAHs from contaminated soil into water as well as evaluation of contribution of dissolved organic carbon (DOC) in mobilization and release of HMW PAHs in crushed and pulverized biochar-amended soil, which was addressed for the first time in this study.
Materials and Methods: Column leaching test was used to evaluate the leaching behavior of selected HMW PAHs from soil. Concentrations of PAHs in column leachates were determined using a GC/MS.
Results: Findings showed strong sorption of the studied HMW PAHs to solid phase in both unamended and amended columns. Dibenz[a,h]anthracene
was not mobilized by water flow in any of the examined treatments and showed the greatest affinity to solid matrix. Mobility and leaching of most HMW PAHs were enhanced in the presence of crushed biochar. Direct correlation between detected concentrations of HMW PAHs in column percolates and DOC was found in biochar-amended soil.
Conclusions: Biochar can be used as a promising cost-effective alternative to activated carbon in immobilization of PAHs in contaminated sites. However, contribution of DOC in mobilization of HMW PAHs from contaminated soils towards groundwater resources cannot be neglected.- انتشار مقاله: 26-07-1398
- نویسندگان: Ali Daryabeigi Zand,Ali Daryabeigi Zand,Ali Daryabeigi Zand
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Applied Biotechnology Reports
- نوع مقاله: Journal Article
- کلمات کلیدی: Soil,Phenanthrene,Immobilization,Biochar,Pyrene
- چکیده:
- چکیده انگلیسی: Contamination of soil with persistent organic contaminants has been of great concern due to their long-term effects in the environment. Polycyclic aromatic hydrocarbons (PAHs) are a well-known group of organic contaminants characterized by their resistance to biodegradation and high hydrophobicity. Mobilization and migration of PAH compounds in hydrocarbon-contaminated site may endanger groundwater resources. The main objective of this study was to investigate the influence of pulverized biochar on immobilization and release characteristics of model PAHs. Column leaching test was used to simulate leaching of PAH compounds from contaminated solid phase towards aqueous phase. Results showed strong sorption of both studied PAHs i.e. phenanthrene and pyrene to soil particles, however, at the end of the experiment 5.32% and 0.99% of the initial solid phase content of, respectively, phenanthrene and pyrene released into water in unamended soil. Application of pulverized biochar could finally reduce mobilization and cumulative release of the above-mentioned PAH compounds significantly. Similar trend was also obtained for sum 16 US EPA PAHs. Variation of pH during the leaching process and its contribution to mobilization and release of selected PAH compounds, which has scarcely studied previously, were also addressed. Results indicated that pulverized biochar as a cost-effective alternative to other carbon-rich amendments e.g. activated carbon can be effectively employed for site remediation purposes to reduce mobilization of PAHs in soil.
- انتشار مقاله: 22-01-1396
- نویسندگان: Ali Daryabeigi Zand,Ali Daryabeigi Zand,Ali Daryabeigi Zand
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Applied Biotechnology Reports
- نوع مقاله: Journal Article
- کلمات کلیدی: plant growth,Phytoremediation,sunflower,Gasoline,Spiked Soil
- چکیده:
- چکیده انگلیسی: Phytoremediation has gained increasing attention in recent years because of its ability to clean up and redevelop brownfield sites. Petroleum hydrocarbon-contaminated sites are among most prevalent industrial sites in Iran as one of the top oil producers in the world, which are in great need of remediation to prevent associated environmental and human health risks. A greenhouse study was conducted to identify the tolerance of sunflower (Helianthus annus L.) and its growth parameters under various scenarios. Additionally, remediation potential of sunflower in spiked soil with low to moderately gasoline-contaminated soil was evaluated. Results indicated that sunflower is a tolerant plant species in low to moderately gasoline-contaminated soil with remarkable biomass establishment in contaminated soil and acceptable phytoremediation potential. Sunflower was found to tolerate gasoline contamination up to the maximum applied concentration of 5000 mg/kg. However, sunflower biomass and height slightly decreased in presence of gasoline in soil which were not significant in most cases (P>0.05). Significant reduction of gasoline under the influence of sunflower was obtained in all vegetated treatments when compared to non-vegetated treatments (P<0.05). Phytoremediation effectiveness of sunflower did not vary significantly with increasing contamination level in soil (P>0.05). Results of the present research indicated that gasoline content of soil cannot be considered as a controlling factor affecting phytoremediation potential of sunflower when soil is polluted with low to moderate levels of gasoline. Soil remediation with sunflower can be considered as a promising approach to manage moderately gasoline-contaminated sites.
- انتشار مقاله: 25-06-1395
- نویسندگان: Ali Daryabeigi Zand,Hassan Hoveidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Applied Biotechnology Reports
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Colloids are small suspended particles in water which cannot be settled or removed naturally due to their light weight and stability. These particles pose some degree of stability and cause water turbidity. There are some concerns regarding colloid removal efficiency in water treatment plants of Iran. In this study, the effectiveness of aluminium sulfate and poly-aluminum chloride was evaluated at different pH values and coagulant dosage in order to find optimal operational conditions for low to high turbidity waters. The influence of lime, as a coagulant aid, on coagulation process was also studied. A set of jar test experiments was conducted to find the optimal pH and coagulant dosage. Results demonstrated that coagulation process can assure turbidity removal from low to medium turbidity waters effectively using relatively low levels of aluminium sulfate and poly-aluminum chloride (10 to 20 mg/L). Turbidity removal efficiency still remained high when the initial turbidities of water were increased to 500 and 1000 NTU. Results showed that turbidity removal is dependent on pH, coagulant dosage, as well as initial turbidity of water for both used coagulants. The highest turbidity removal efficiency was within 82.9-99.0% for alum and 93.8-99.6% for poly-aluminum chloride over the applied range of turbidity. Both applied coagulants demonstrated promising performance in turbidity removal from water; however, poly-aluminum chloride showed better performance compared to aluminium sulfate. The results of the current study can be used as a baseline data for drinking water treatment facilities which uses these two types of coagulants.
- انتشار مقاله: 24-06-1394
- نویسندگان: Ali Daryabeigi Zand,Hassan Hoveidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Phytoremediation,Flax,Hydrocarbon-polluted soil,Burningbush
- چکیده:
- چکیده انگلیسی: Phytoremediation is an emerging environmental-friendly technology that can be a promising solution to remediate oil-polluted soils. The impact of high amount of hydrocarbons on growth characteristics of burningbushand common flax was evaluated in this survey. The influence of organic fertilizers was also assessed on growth of plant species in oil-contaminated soil. Soil samples in which plants showed the best growth were analyzed for residual total petroleum hydrocarbons (TPHs) by GC-FID. Burningbush was employed for the first time in the history of phytoremediation of oil-polluted soils in this research. The two studied plant species demonstrated promising remediation efficiency in highly contaminated soil; however, petroleum hydrocarbon contamination depressed growth of surveyed plants significantly. Utilization of peat fertilizer improved plants’ growth parameters in highly oil-contaminated soil. Flax and burning bush reduced TPHs levels in contaminated soil by 87.63 and 65.29 percent, respectively, in comparison to initial concentration.
- انتشار مقاله: 02-03-1387
- نویسندگان: Ravanbakhsh Shirdam,Ali Daryabeigi Zand,Gholamreza Nabi Bidhendi,Nasser Mehrdadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: RIAM,Waste,Transfer stations,Leopold,Green spaces
- چکیده:
- چکیده انگلیسی: The current situation of world’s environmental issues, indicates that not only the man-made environmental damages have not been diminished, but also has given rise to more acute issues such as water and soil pollution, biodiversity loss, ozone depletion, greenhouse phenomena, etc. One of the most prominent effects of urban development on environmental problems caused by solid waste generated in urban areas. Transportation and disposal of wastes are directly connected to public health, and pollution of water, soil and air. Municipal solid waste transfer stations play an important role in waste management systems; however, they have been practically disregarded in most developing countries. Environmental impacts of solid waste transfer station (SWTS) for the relevant options in the north west of Tehran city is the main focus of this study. Environmental impact assessment of these options was performed using two methods: rapid impact assessment matrix (RIAM) and Iranian Leopold matrix (modified Leopold matrix). The rapid impact assessment matrix method provides fast and accurate ways of analysis and reanalysis of specified components. Iranian Leopold matrix chiefly is used for the reorganization of the project impacts in both the building and operation stages. Indoor loading/unloading with establishment of green space around the SWTS was found to be the most pragmatically beneficial option, based on the obtained results from Iranian Leopold and Rapid Impact Assessment Matrices.
- انتشار مقاله: 17-11-1397
- نویسندگان: Ali Daryabeigi Zand,Azar Vaeziheir,Hasan Hoveidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Waste Management,Fuel consumption,Transportation,Collection,Air pollutant emissions
- چکیده:
- چکیده انگلیسی: Solid waste collection, transfer and transportation (SWCTT) is a fundamental component of solid waste management systems that contributes to both the costs and environmental emissions associated with managing solid waste. The objective of this study is to project the fuel consumption and fuel costs of SWCTT in Tehran from 2018 to 2032. A further objective is to evaluate the air pollutant emissions from fuel consumption of SWCTT vehicles. For these purposes Waste Guidance System (WAGS) and Energy and Environment software were applied. Results of the present study showed that more than 39 million dollars would be required during the next 15 years in the SWCTT sector to supply 366 million liters of diesel fuel. In the context of local air pollution impact, about 9902.8, 6161.7, 73.5, 2639.6, 8065.5 and 4839.2 of NOX, SO2, SO3, CO, CH and SPM will be anticipated to be emitted by SWCTT sector in Tehran during the studied period.
- انتشار مقاله: 20-08-1397
- نویسندگان: Ali Daryabeigi Zand,Maryam Rabiee Abyaneh,Hasan Hoveidi
- مشاهده
- جایگاه : پژوهشی
- مجله: Environmental Energy and Economic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Life cycle assessment,rural waste,IWM-model,Abyaneh village,economic saving
- چکیده:
- چکیده انگلیسی: Waste disposal in the current situation, which quantity and variety of waste are increasing, needs not only effective management principles but also depends on environmentally-friendly methods to put as less environmental footprint as possible. This study aims to assess the energy consumption, emission of greenhouse gases and air pollutants which normally produce during various waste management scenarios in Abyaneh. The next objective of this research is to choose the best management method and practice which is completely compatible with the environment. In order to reach these goals, after sampling and waste analysis in terms of quantity and quality, results analysis for nine scenarios was conducted. These scenarios, considered for life cycle assessment, are combination of four waste disposal methods including landfill, recycling, composting and incineration. Life cycle inventory was done by IWM-1 model. The potential of economic saving and greenhouse gases and air pollutants emission reduction in various waste management approaches in Abyaneh were evaluated. It was shown that scenarios number 6, 5 and 2 with combination of landfill, recycling and composting methods have the least negative impacts on the environment. Also, the mentioned scenarios were found to be cost effective as they are not accompanied by greenhouse gas and acid gas emission. As produced waste in Abyaneh is consisted of 38.8% and 59% recyclable and compostable waste respectively, the mentioned scenarios can be viable options for effective waste management and can play an important role in reduction of environmental problems in this village.
- انتشار مقاله: 04-10-1396
- نویسندگان: Ali Daryabeigi Zand,Maryam Rabiee Abyaneh
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Environmental Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Zero-valent iron nanoparticles,toxicity,Z. mays,plant growth,phytoextraction
- چکیده:
- چکیده انگلیسی: Application of nanotechnology has gained remarkable interest in recent years and environmental exposure to nanomaterials is becoming inevitable. Therefore, nanotoxicity problem is gaining more attention. Zero-valent iron nano particles (nZVI) are being used widely for different purposes such as environmental remediation. Excessive amounts of nanomaterials may pose inhibitory effects on growth of plants cultivated in nZVI-affected soils which has been addressed in this research. Moreover, fate of nZVI in plants was investigated in the present study. Plant seeds were exposed to different concentrations of nZVI i.e. 0, 100, 250, 500, 800 and 1000 mg/kg. Z. mays was selected as the model plant in this study and found to be a tolerant plant species in presence of low to moderate levels of nZVI in soil. However, addition of higher doses of nZVI reduced seedling emergence and biomass establishment. Results indicated that the total Fe concentrations in Z. mays treated with nZVI increased compared to the control. Considerably higher accumulation of Fe in roots of Z. mays compared to the shoots in all treatments was found. Results indicated that the total Fe contents in Z. mays treated with nZVI were higher than those in control, with the highest Fe accumulation capacity of 24666.2 µg per pot which was obtained in soil received 500 mg/kg nZVI. Overally, toxic effects of higher doses of nZVI on plants were observed in this study. Intelligent use of nZVI for environmental purposes such as applying low to moderate levels of nZVI in soil remediation activities could remarkably prevent their adverse impacts on plant species, promote plant phytoextraction capability, and reduce nZV emission in the environment.
- انتشار مقاله: 03-02-1399
- نویسندگان: Ali Daryabeigi Zand,Ali Daryabeigi Zand,Ali Daryabeigi Zand,Ali Daryabeigi Zand
- مشاهده