نشریه محیط زیست طبیعی

ارزیابی چرخة حیات سنتز کربن نیترید گرافیتی با رویکرد استفاده در صنایع مستقر در حوضۀ خلیج فارس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه علوم و فناوری زیستی، دانشکده علوم و فناوری نانو و زیستی، دانشگاه خلیج فارس، بوشهر، ایران

2 استادیار گروه علوم و فناوری زیستی، دانشکده علوم و فناوری نانو و زیستی، دانشگاه خلیج فارس، بوشهر، ایران

3 استادیار گروه محیط زیست، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

چکیده

استفاده از فتوکاتالیست­ ها به‌منظور حذف آلاینده ­ها به­‌دلیل ویژگی­ های منحصر به فرد خود، در سال ­های اخیر مورد توجه محققان قرار گرفته است. کربن­نیتریدگرافیتی (g-C3N4) از جمله به‌روزترین و کارآمدترین فتوکاتالیست­ های سازگار با محیط­زیست است اما استفاده از ترکیبات نوآرا، بدون توجه به ارزیابی چرخۀ حیات آن ­ها منطبق بر نگرش توسعۀ پایدار نیست. در مطالعه حاضر برای نخستین بار ارزیابی چرخۀ حیات فتوکاتالیست g-C3N4 استفاده شده جهت گوگردزدایی پساب صنایع منطقۀ پارس‌جنوبی در سواحل خلیج فارس انجام شد. در این پژوهش جهت ویژه­ سازی مصرف آب از روش ReCiPe، محاسبة میزان مصرف انرژی از روش CED، محاسبۀ انتشار گازهای گلخانه­ ای از روش GGP و ردپای بوم ­شناسی از روش EP استفاده گردید. نتایج به‌دست آمده نشان داد که بیشترین تأثیر محیط­زیستی سنتز g-C3N4، عمدتاً بر روی بوم­سازگان های آبی و به‌ویژه بوم­ سم­ شناسی آب­ دریا و آب شیرین با مجموع 74/06% و در درجۀ دوم بر روی سمیت انسانی (6.15%) است. آثار مخرب محیط­زیستی به کمک بهره­گیری از شاخص­های نهایی نیز به ترتیب به­صورت آسیب به منابع (63/05%)> آسیب به سلامت انسان (34/56%)> آسیب به بوم­سازگان (2.39 %) برآورد گردید. آنالیز حساسیت نیز مصرف الکتریسته را به‌عنوان موثرترین پارامتر بروز آثار مخرب محیط­زیستی تعیین نمود. بر اساس نتایج به‌دست آمده می ­توان بیان داشت که بهره ­گیری از انرژی­های تجدیدپذیر و جایگزینی آن­ها با منابع فسیلی، می­تواند نقش موثری در کاهش پیامدهای محیط­زیستی حاصل از سنتز g-C3N4  ایفا نماید. نتایج حاصل از این مطالعه می ­تواند به­عنوان راهبردی مقدماتی در زمینۀ ارزیابی چرخۀ حیات ترکیبات نوآرا، پیش از کاربست بزرگ مقیاس آن­ها استفاده شود.

کلیدواژه‌ها

عنوان مقاله [English]

Life cycle assessment of graphite carbon nitride synthesis with application approach in industries located in the Persian Gulf basin

نویسندگان [English]

  • Narges Mehboudi 1
  • Mohsen Nowrouzi 2
  • hajar abyar 3

1 M.Sc. Student, Department of Science and Biotechnology, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr, Iran

2 Assistant Professor, Department of Science and Biotechnology, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr, Iran

3 Assistant Professor, Department of Environmental Sciences, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

چکیده [English]

The use of photocatalysts to remove contaminants has received more attention in recent years due to its unique properties. Carbon nitride graphite (g-C3N4) is one of the most up-to-date and efficient types of environmentally friendly photocatalysts. It should be noted that the use of novel compounds without considering the evaluation of their life cycle is not consistent with the attitude of sustainable development. In the present study, for the first time, an LCA analysis was performed for the g-C3N4 photocatalyst used to desulfurize industrial effluents in the South Pars region, on the shores of the Persian Gulf. In this case, the ReCiPe method was used to specialize in water consumption, chemical energy demand (CED) for calculating energy consumption, greenhouse gas protocol (GGP) for calculating greenhouse gas emissions, and ecological footprint (EP) method. The results showed that the greatest environmental impact of g-C3N4 synthesis mainly appeared in aquatic ecosystems, in specific marine and freshwater ecotoxicity with a total of 74.06% and by human toxicity (6.15%). The final indicator application showed the destructive environmental effects as follows: resources (63.05%) > human health (34.56%) > ecosystems (39.39%), respectively. Sensitivity analysis also determined the consumption of electricity as the most effective parameter for the occurrence of harmful effects on the environment. Therefore, based on the obtained results, it is stated that the use of renewable energies and their replacement with fossil-based energy sources can play an effective role in reducing the environmental consequences of the g-C3N4 synthesis. The results of this study can be also used as a preliminary strategy to conduct further studies in the field of LCA and environmental impact assessment of novel compounds before their large-scale application.

کلیدواژه‌ها [English]

  • Life Cycle Assessment
  • Graphite Carbon Nitride
  • Greenhouse Gases
  • Marine Biology
  • Energy Demand
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نشریه محیط زیست طبیعی
دوره 74، شماره 4
اسفند 1400
صفحه 855-868