دورية أكاديمية
New thermodynamic entropy calculation based approach towards quantifying the impact of eutrophication on water environment.
| العنوان: | New thermodynamic entropy calculation based approach towards quantifying the impact of eutrophication on water environment. |
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| المؤلفون: | Luo L; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No. 13, Yanta Road, Xi'an 710055, China., Duan N; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No. 13, Yanta Road, Xi'an 710055, China., Wang XC; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No. 13, Yanta Road, Xi'an 710055, China. Electronic address: xcwang@xauat.edu.cn., Guo W; School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia., Ngo HH; School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia. Electronic address: h.ngo@uts.edu.au. |
| المصدر: | The Science of the total environment [Sci Total Environ] 2017 Dec 15; Vol. 603-604, pp. 86-93. Date of Electronic Publication: 2017 Jun 14. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Amsterdam, Elsevier. |
| مواضيع طبية MeSH: | Biomass* , Entropy* , Eutrophication* , Thermodynamics*, Anabaena/physiology ; Chlorella vulgaris/physiology ; Microcystis/physiology ; Nitrogen/metabolism ; Phosphorus/metabolism |
| مستخلص: | Although the eutrophication phenomenon has been studied for a long time, there are still no quantifiable parameters available for a comprehensive assessment of its impacts on the water environment. As contamination alters the thermodynamic equilibrium of a water system to a state of imbalance, a novel method was proposed, in this study, for its quantitative evaluation. Based on thermodynamic analyses of the algal growth process, the proposed method targeted, both theoretically and experimentally, the typical algae species encountered in the water environment. By calculating the molar enthalpy of algae biomass production, the heat energy dissipated in the photosynthetic process was firstly evaluated. The associated entropy production (ΔS) in the aquatic system could be then obtained. For six algae strains of distinct molecular formulae, the heat energy consumed for the production of a unit algal biomass was found to proportionate to the mass of nitrogen (N) or phosphorus (P) uptake through photosynthesis. A proportionality relationship between ΔS and the algal biomass with a coefficient circa 44kJ/g was obtained. By the principle of energy conservation, the heat energy consumed in the process of algae biomass production is stored in the algal biomass. Furthermore, by measuring the heat of combustion of mature algae of Microcystis flos-aquae, Anabaena flos-aquae, and Chlorella vulgaris, the proportionality relationships between the heat energy and the N and P contents were validated experimentally at 90% and 85% confidence levels, respectively. As the discharge of excess N and P from domestic wastewater treatment plants is usually the main cause of eutrophication, the proposed impact assessment approach estimates that for a receiving water body, the ΔS due to a unit mass of N and P discharge is 268.9kJ/K and 1870.1kJ/K, respectively. Consequently, P discharge control would be more important for environmental water protection. (Copyright © 2017. Published by Elsevier B.V.) |
| فهرسة مساهمة: | Keywords: Entropy production; Nutrients; Photosynthesis; Water environment |
| المشرفين على المادة: | 27YLU75U4W (Phosphorus) N762921K75 (Nitrogen) |
| تواريخ الأحداث: | Date Created: 20170618 Date Completed: 20180806 Latest Revision: 20181202 |
| رمز التحديث: | 20221213 |
| DOI: | 10.1016/j.scitotenv.2017.06.069 |
| PMID: | 28623794 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-1026 |
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| DOI: | 10.1016/j.scitotenv.2017.06.069 |