Sadegh Partani; Asiye Noruzi
Abstract
Introduction: Pollution of water receiving sources in waste disposal sites is the most important risk of waste disposal on the environment. Therefore, this research has identified the ecological risk (human society, natural flora and fauna) by including the characteristics of sources and pollutants and ...
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Introduction: Pollution of water receiving sources in waste disposal sites is the most important risk of waste disposal on the environment. Therefore, this research has identified the ecological risk (human society, natural flora and fauna) by including the characteristics of sources and pollutants and environments affected by pollution and its type, and has examined their effects with a comprehensive prioritization.Materials and methods: In this integrated applied study, during a step-by-step and step-by-step process and using available information and statistics (in terms of time and spatial area affected), including examples of the concentration of elements and chemical and physical compounds of pollutants with the origin of waste Urban and waste disposal activities, all types of risks that must be responded to were identified and the contribution of each of the effective, effects and affected was obtained. Axure RP program was used to draw diagrams of safety level calculations, risk and dimension and their distance and risk analysis.Results and discussion: The results showed that the ecological risk of receiving resources around Bojnord Burial Center as the selected center of North Khorasan Province is in the range of low ecological risk. The biological risk caused by heavy metals is moderate, and the risk of the human food cycle and animal and plant cover is low and without threat to the food cycle. The pollution risk index of the effective factors in the calculation for Bojnoord landfill with current implementation conditions was estimated as Rm=81%. The status of this risk is in the high range of risks and on the border of risks.Conclusion: According to the identification and analysis of the types of risk around the Bojnord landfill, equal risk, equal risk and equal safety maps were drawn, as a result of which vulnerable centers can be identified and proper planning can be done to control and protect them. In fact, the design of the co-risk map and the potential and actual sources of pollution, the type of pollutant and the target and affected environment, taking into account the time domain, can greatly improve the quality management of resources and complete the existing database in the country and province and prepare for long-term planning.
Sadegh Partani; Seyed Mohammad Reza Madany; Mir Hassan Seyed Seraji
Abstract
Introduction: Due to the development of cities and increasing water consumption per day, a large amount of wastewater is being daily produced. The use of refined sewage in irrigating the green space prevents environmental pollution. This research was carried out to investigate the effects of refined ...
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Introduction: Due to the development of cities and increasing water consumption per day, a large amount of wastewater is being daily produced. The use of refined sewage in irrigating the green space prevents environmental pollution. This research was carried out to investigate the effects of refined sewage treatment on plant growth and its effects on physical and chemical properties of soil. Material and methods: After studying the research carried out inside and outside the country, a certain geographic area, facilities and equipment were evaluated. Then, with coordination with the related organizations, this study was carried out in Shahid Bagheri highway in Tehran. Irrigation of the plants as treatments were done as a completely randomized block design (CRD) under through two treatments (100% wastewater and 0% wastewater (well water which is current irrigation system)). Considering the irrigations as treatments for green space plants, characteristics of the applied sewage which was provided from wastewater Ekbatan treatment plant the effects of midterm period use of effluent (in one-year) physical and chemical properties of soil was carried out.the effect of irrigation with treated wastewater on the vegetative characteristics of selected species of green space (donut) by clay meter was recorded every three days regarding to the curved parts of the plant. Due to the limited amount of wastewater parameters and in order to verify and evaluate the results, the quality of the waste water was measured monthly in Ekbatan's WWTP laboratory and was compared to the standard of the Iranian Environment Organization. Results and discussion: By studying the role of wastewater on the growth and maintenance of urban green spaces in the form of a pilot study, the possibility of reuse of the wastewater from the sewage treatment plant of Ekbatan town was assessed. The aim of this study was to identify sustainable water sources in order to maximize of the wastewater recycling for the implementation of human ecology goals for sustainable development. The results showed that the effluent was in the permitted range for irrigation of green space. On the other hand, to investigate the effect of treated wastewater on the soil before and after the experiment, 18 soil samples were randomly selected, nine of which were sampled from 0 to 30 cm depth and nine others from the depths of 30 to 60 cm. All samples were mixed and transferred to the laboratory. The physico-chemical properties of the soil were measured at both depth ranges. The concentration of each element was within the standard limits, which is a proof of the non-contamination of the soil. In other words, the use of wastewater for irrigation does not lead to soil contamination and irrigation with wastewater causes an increase in the nutrition and fertility of the soil. Also, the growth rate of the organs as a function of the treatment conditions during the experiment had a significant difference. Conclusion: In general, the results of this study showed that the amount of physiological parameters of plants irrigated with wastewater was greater than that of well water. Therefore, it can be concluded that the use of wastewater for irrigation of green space is possible and has no negative effect on soil.
