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بررسی تأثیر فصول مختلف بر ترکیب و سرانه پسماند خطرناک خانگی تولیدی شهر تهران و ارائه راهکارهای زیست محیطی به شهروندان با رویکرد اجتناب و کاهش تولید | ||
| محیط شناسی | ||
| مقاله 6، دوره 46، شماره 1، خرداد 1399، صفحه 103-120 اصل مقاله (4.09 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jes.2020.79329 | ||
| نویسندگان | ||
| هومن غلامپور ارباستان؛ سعید گیتی پور* | ||
| گروه مهندسی محیط زیست، دانشکده محیط زیست، دانشکدگان فنی، دانشگاه تهران، تهران، ایران | ||
| چکیده | ||
| در میان پسماندهای خانگی که بواسطه فعالیت های روزمره خانوارها تولید می گردند، پسماندهایی حضور دارند که به‌دلیل نشان دادن یکی از خواص سمیت، اشتعال زایی، واکنش پذیری و خورندگی در دسته پسماندهای خطرناک خانگی طبقه بندی می گردند. اولین گام بمنظور برنامه ریزی جهت کاهش و مدیریت این دسته از پسماندها، شناخت ترکیب، سرانه تولید و تأثیرات عوامل مؤثر نظیر تغییرات فصلی بر میزان این پسماندهاست. در پژوهش حاضر، بمنظور بررسی تأثیر تغییرات فصلی بر ترکیب و میزان تولید پسماندهای خطرناک خانگی، پسماند تولیدی توسط 600 خانوار تهرانی از مناطق 22 گانه شهر تهران در فصول مختلف، جمع آوری شده و مورد بررسی و آزمایش قرار گرفته است. بر اساس نتایج این بررسی، 37/7 % از پسماند خطرناک تولیدی توسط خانوارهای تهرانی را پسماند پاک کننده های خانگی تشکیل می دهند. نتایج دیگر این پژوهش حاکی از آن است که میزان سرانه تولید در بازه (6/26-8/25) گرم در روز برای هر شهروند تهرانی بر آورد شده است که این میزان (1/22-1/58) درصد از سهم کل پسماند خانگی جامعه نمونه را بخود اختصاص داده است. علاوه بر این، بیشترین سهم درصد پسماندهای خطرناک خانگی از جریان پسماند، مربوط به فصل زمستان، و کمترین آن مختص به فصل پاییز می باشد. | ||
| کلیدواژه‌ها | ||
| جزء ویژه خانگی؛ سرانه تولید؛ ترکیب پسماند؛ تأثیرات فصلی | ||
| عنوان مقاله [English] | ||
| Investigation of Seasonal Variation Effects on Household Hazardous Waste Composition and Generation Rate in Tehran and Proposing Environmental Solutions to Prevent and Reduce | ||
| نویسندگان [English] | ||
| Houman Gholampour Arbastan؛ Saeid Gitipour | ||
| Department of Environmental Engineering. School of Environment, College of Engineering, University of Tehran, Tehran, Iran | ||
| چکیده [English] | ||
| Abstract Household waste, which is any waste generated from domestic source, represents over two-thirds of the municipal solid waste (MSW) stream. A small portion, typically 1% by weight is defined as household hazardous waste (HHW). Household hazardous waste (HHW) is a heterogeneous waste category that is usually defined as ‘‘flammable, corrosive, reactive, caustic, and toxic’’. Quantification and characterization HHW is an important and meaningful step for the promotion of appropriate HHW management and source separation of this kind of waste in Tehran. In this research, for investigating the effect of seasonal variation on generation rate and composition of HHW, A four-stage systematic tracking survey of 600 households was conducted in 22 municipal districts in Tehran to determine the characteristics of household hazardous waste (HHW) generated by the city. The results indicate that the rate of HHW generation was (6.26– 8.25) g/person/day, which accounted for (1.22-1.58) % of the household solid waste stream. The largest category in this fraction was home cleaning products. The highest rate of HHW generation of 8.25 g/person/day was observed in winter, which was most likely caused by the celebration of Nowruz. Introduction Household waste, which is any waste generated from domestic source, represents over two-thirds of the municipal solid waste (MSW) stream and internationally a large part ends up at landfills. A small portion, typically 1% by weight is defined as household hazardous waste (HHW). In US legislation, HHW is described as ‘‘Leftover household products that contain corrosive, toxic, ignitable, or reactive ingredients’’. According to article 2, paragraph 3 of Iran Waste Management Act, any wastes requiring special care due to containing at least one of the hazardous components of poisonous, pathogenesis, explosiveness, inflammability, corrosiveness and the likes. Those medical wastes, as well as some part of ordinary, industrial, and agricultural wastes which needs to special management, are included as specific wastes. Furthermore, based on Executive Regulation of Waste Management Act, the special component of domestic and agricultural waste, is not considered domestic waste but the responsibility of its executive management is for the domestic waste executive management which is municipality. Leachate contains inorganic and organic elements. Xenobiotic organic compounds (XOCs) and heavy metals are generally classified as the hazardous substances occurring in leachate. Hazardous XOCs and heavy metals can be toxic, corrosive, flammable, reactive, carcinogenic, teratogenic, mutagenic and ecotoxic, among other hazards, and can also be bioaccumulative and/or persistent. MSW landfill leachate analyses permit identification of the commonly found XOCs and heavy metals derived from waste with a domestic origin. Moreover, cosmetic wastes, lotions, detergents, batteries and fluorescent lamps which are all categorized as HHW in municipal waste stream, may noticeably increase siloxane and mercury-containing vapors in the gases emitted from the disposal sites and landfills. Apart from the mentioned environmental effects, the significant costs of transportation, pre-treatment and dispose of the HHW can be pointed out as the economic effects of these wastes. Workplace accidents and work-related illnesses of household waste collectors and job dissatisfaction are the social effects of HHW management. Quantification and characterization HHW is an important and meaningful step for the promotion of appropriate HHW management and source separation of this kind of waste Material & Methods Sampling Therefore, we used the household as the basic unit of analysis, one year as the large cycle, and weeks of various seasons as the small cycles in this study. household’s waste generation. Therefore, we used the household as the basic unit of analysis, one year as the large cycle, and weeks of various seasons as the small cycles in this study. In each season, to obtain statistically significant results, we investigated 600 households in all over the 22 districts of Tehran. All of households participating in the study, 600 (from 22 different districts of Tehran) participated in all four stages of the survey. HHW Classification Once the generation analysis was obtained, materials, packages, and containers were separated according to the classification suggested by literature. waste categories were: (1) home cleaning, (2) automotive maintenance, (3) batteries, (4) medicines, (5) biological-infectious (syringes, dialysis equipment, used bandages, and etc.), (6) gardening, (7) self-care products, (8) home maintenances, (9) fluorescent lamps, (10) miscellaneous. According to previous studies, to mark any leftover as positive it should represent at least 1% of the product. Determination of Generation Rate and HHW Composition Solid waste sampling was carried out during the summer of 2018. Bags were collected daily for seven consecutive days. Once the bags were gathered from the area, each bag was individually weighed. Refuse was hand sorted and individual components were also weighed. Categories and sub-categories corresponded to the format described elsewhere Once each part was categorized, each tray was weighed, taking care to note if the final sum corresponded to the total weight (kg) of the bin bag. The procedure was performed for each individual bin bag. For each household, the weight of solid waste was averaged throughout the whole period. The result indicated the average solid waste generation per household (kg/household). Parallel to the solid waste generation analysis, packaging and containers of hazardous wastes were selected and sorted, according to the classification proposed by previous studies. HHW was classified according to ten categories, as mentioned before. After categorization, each group was weighed, including the weight of the containers per product plus any product remaining inside the container. Finally, average generation rate and the composition of HHW in different seasons was calculated which will be presented in this paper. Discussion of Results Shapiro-Wilk analysis showed that the household hazardous waste generation in different season in Tehran are normally distributed with no significant statistical deviation (sig>0.05). During the sampling period, 6473.56, 6863.05, 6530.29, and 6097.61kg mixed solid wastes were collected from 600 households in Tehran in Spring, Summer, Autumn and, Winter respectively. The most tendency for producing HHW is in summer with 105.33kg and the less is for autumn by 79.98kg. The results indicate that the rate of HHW generation was (6.26– 8.25) g/person/day, which accounted for (1.22-1.58) % of the household solid waste stream. The largest category in this fraction was home cleaning products. Conclusions The results of the present study, which determine the composition and production rate of hazardous household waste in Tehran, indicate that the per capita rate of hazardous domestic waste production in Tehran is higher than the per capita values obtained in all domestic studies such as Isfahan, Amirkola. Based on the comparison HHW generation in Japan, Switzerland, China, Indonesia, Malaysia, Mexico, and Denmark, indicating generation HHW in Tehran higher than in the country of Japan, Switzerland, China, and Indonesia, but is smaller when compared to the generation HHW in Malaysia, Mexico, and Denmark. Indeed, a notable difference exists among the results, which can be explained by differences in the time the investigations were conducted, country characteristics, methodology and proposed objectives. Seasonal rates of HHW generation are summarized in this paper. On average, a higher rate of HHW generation of 8.25 g/person/day was observed in winter, which was most likely caused by the celebration of Iranian ancient Nowruz. Most household follow the custom of cleaning their houses to give a warm welcome to their family members, relatives and friends before the new year Festival. Finally, this study found a high disposal rate for used home cleaning containers in the winter survey period (e.g., oven cleaners, all-purpose cleaners, laundry detergent, powder or liquid). Generally, most Iranian households do not throw low value items away except when important events. As noted above, it can be concluded that the most part of the household's hazardous waste can be significantly reduced by increasing the awareness of citizen to consume the product entirely and also clean the containers. Given the results of the present study and the possible effects of these substances on landfill sites, further studies on leachate compounds and emitted gas from landfill sites are strongly recommended. | ||
| کلیدواژه‌ها [English] | ||
| Household Hazardous waste, Special Waste, Generation Rate, Waste Composition, Seasonal Variation | ||
| مراجع | ||
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