المؤلفون: United States. Congress. House. Committee on Energy and Commerce

مصطلحات موضوعية: Legislative hearings., Infrastructure (Economics) -- United States., Federal aid to energy development -- United States., Renewable resource integration -- Government policy -- United States., Renewable energy sources -- Economic aspects -- United States., Federal aid to water quality management -- United States., Broadband communication systems -- United States., Digital divide -- United States., Renewable energy sources -- United States.

عناوين أخرى: Revitalizing our nation's infrastructure and economy

الوصول للمادة أونلاين: https://purl.fdlp.gov/GPO/gpo186658Test
https://www.govinfo.gov/content/pkg/CHRG-117hhrg46458/pdf/CHRG-117hhrg46458.pdfTest

المؤلفون: Milanta Tom, Sabu Thomas, Bastien Seantier, Yves Grohens, Mohamed Pulikaparambil Kochaidrew, Ramakrishnan Subramanian, Tapas Ranjan Mohanty, Henri Vahabi, Hanna Joseph Maria, Jibin Keloth Paduvilan, Martin George Thomas

المصدر: eXPRESS Polymer Letters, Vol 18, Iss 6, Pp 638-655 (2024)

مصطلحات موضوعية: natural fiber, reinforcement, renewable resource, elastomer, filler, nanocomposites, natural rubber, nanofiber, rheology, Materials of engineering and construction. Mechanics of materials, TA401-492, Chemical technology, TP1-1185

الوصف: The augmented demand for sustainable nanocomposites has paved the way to explore naturally derived materials. Nanocellulose, with its bountiful sources and inherent properties, ranks top in the list of biofillers with a perspective of reducing the carbon footprint. A systematic study is required to understand the reinforcing effect of various types of nanocellulose. In the present work, we selected three types of nanocellulose, i.e., cellulose nanocrystal (CNC), cellulose nanofiber (CNF) and microfibrillated cellulose (MFC), to investigate the effect of geometrical structure on the properties of unvulcanized natural rubber (NR). Incorporating these fillers improved the tensile strength and modulus of natural rubber films significantly through reinforcement via filler network structure. The reinforcing effect of CNF was found to be higher compared to CNC and MFC, where an increase of 3.85 MPa in tensile strength from the neat sample was obtained. More uniform dispersion was evident through transmission electron microscopy, atomic force microscopy and Raman imaging for CNF in the rubber matrix. The structural properties were determined using Raman spectra and X-ray diffraction. The rheological studies revealed a good interaction between filler and NR. The work presented comprehensively compares different types of nanocellulose as reinforcing filler in NR matrix, which will help the researchers select an ideal type for their specific application and, thus, the proper usage of renewable resources, leading to sustainability and a circular economy.

وصف الملف: electronic resource

العلاقة: http://www.expresspolymlett.com/letolt.php?file=EPL-0012899&mi=cdTest; https://doaj.org/toc/1788-618XTest

الوصول الحر: https://doaj.org/article/30eb8e54a85146e996c676aa840b9d9cTest

المؤلفون: Xiaona Li, Yancai Zhi, Minghao Jia, Xiaowei Wang, Mengna Tao, Zhenyu Wang, Baoshan Xing

المصدر: Carbon Research, Vol 3, Iss 1, Pp 1-14 (2024)

مصطلحات موضوعية: Carbon neutrality, Feedstock property, Hydrothermal humification, Photosynthetic mechanisms, Renewable resource, Production of electric energy or power. Powerplants. Central stations, TK1001-1841, Environmental sciences, GE1-350

الوصف: Abstract The artificial humic acids (AHA) approach contributes to achieving the carbon (C) emission peaking and neutrality goal through efficient recycling of waste biomasses and promotion of plant photosynthesis. However, the dependence of their production processes and photosynthetic promotion mechanisms on feedstocks remains unclear. In this study, waste biomasses including camphor leaves (CL), corn stalks (CS), peanut shells (PS), and mixed cyanobacteria (MC) have been respectively converted into artificial humic acids through an environmentally friendly hydrothermal humification approach. The dynamic humification process of different feedstocks and the composition, structural properties, and electron transfer capacity of AHA products were determined. Moreover, the different AHA products were applied to corn to explore their respective photosynthetic promotion mechanisms. High relative contents of lignin and C/N in feedstocks are not conducive to the formation of photodegradable substances and the redox property in AHA. The application of AHA increased the net photosynthetic rate and biomass C of corn by 70–118% and 22–39%, respectively. The AHA produced from higher H/C (0.19) and hemicellulose content (17.09%) in feedstocks (e.g., MC) increased corn photosynthesis by improving light energy capture and conversion efficiency in the PSII process. In contrast, the AHA produced from a higher content of lignin (19.81%) and C/N (7.67) in feedstocks (e.g., CS) increased corn photosynthesis by providing functional enzymes (proteins) and nutrients for leaves. This work provides new insights into the utilization of renewable resources, and the artificial humic acids approach sheds light on environmental sustainability by constructing a closed loop of C in environments. Graphical Abstract

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2731-6696Test

الوصول الحر: https://doaj.org/article/8d039d06f28d492d860922dda7100854Test

المؤلفون: Shivapura Manchaiah Anush, Suchetha Naga Raju, Ballupet Honnapa Gayathri, Keresanthe Parameshwarappa Ajeya, Yarabahally Ravindranath Girish, Sanneerappa Darshan, Yelaware Puttaswamy Naveen, Kalappa Prashantha, Byrappa Krishnaiah Narendra, Aishwarya Jayaram

المصدر: eXPRESS Polymer Letters, Vol 18, Iss 1, Pp 102-115 (2024)

مصطلحات موضوعية: chitosan, nanofiller, additive, renewable resource, nanocomposite, Materials of engineering and construction. Mechanics of materials, TA401-492, Chemical technology, TP1-1185

الوصف: A novel adsorbent material for the effective removal of hazardous metal ions from aqueous solutions was developed through modifications to chitosan. The process involved the use of vanillin to create cross-linked chitosan, which was then combined with thiourea-based graphitic carbon nitride (g-C3N4) to form a gel matrix. The resulting composite material was thoroughly characterized using various techniques, including Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffractometry. To assess its efficacy, adsorption experiments were conducted to determine the capability of the synthesized compounds to adsorb Cu(II) and Cr(VI) ions. The observed results found that the adsorption process was found to follow pseudo-second-order kinetics and the Langmuir isotherm model. Through thermodynamic studies, it was revealed that the adsorption process was both endothermic and spontaneous in nature. Furthermore, desorption studies confirmed that the material could be regenerated, making it reusable. This characteristic allowed for the effective recovery of the adsorbate species and highlighted the potential for reusing the adsorbent material multiple times.

وصف الملف: electronic resource

العلاقة: http://www.expresspolymlett.com/letolt.php?file=EPL-0012721&mi=cdTest; https://doaj.org/toc/1788-618XTest

الوصول الحر: https://doaj.org/article/c242820df12546d2a530de3fa2210dc1Test

المؤلفون: Xue Li, Ning Liu, Jiming Zhang, Zhentao Sun, Shifeng Fu, Xiumei Zhan, Jinfeng Yang, Rongxin Zhou, Hongda Zhang, Hang Liu, Xiaori Han

المصدر: Plant, Soil and Environment, Vol 69, Iss 8, Pp 363-373 (2023)

مصطلحات موضوعية: renewable resource, organic material, carbonisation, nutrient availability, absorption efficiency, Plant culture, SB1-1110

الوصف: Biochar is the carbon-rich product obtained when biomass is anaerobically heated. In this study, different materials (corn straw and peanut shell) and pyrolysis temperatures (350, 450 and 550 °C) affect the elemental composition, surface structure, and biochar properties. The results showed that the carbon (C) content in biochar increased as the temperature increased, but hydrogen (H) and nitrogen (N) did not change. The alkane overpressure of corn straw and peanut shell increased first and then decreased with the increased temperature; the fatty alkyl chain disappeared, but the ash content increased at 550 °C. At high temperatures, the aromaticity (H/C ratio) and hydrophobicity (O/C ratio) of biochar become "carbon-rich particles", while the polarity (O + N)/C decreases significantly. The pore wall of biochar became thinner with the increase in pyrolysis temperature, the internal pore structure became larger, and a large number of micropores appeared in biochar. Biochar pyrolysed at 550 °C has much higher C, ash content, pore, and stronger buffering capacity, and thus is more promising to improve soil health.

وصف الملف: electronic resource

العلاقة: https://pse.agriculturejournals.cz/artkey/pse-202308-0001_pyrolysis-temperature-had-effects-on-the-physicochemical-properties-of-biochar.phpTest; https://doaj.org/toc/1214-1178Test; https://doaj.org/toc/1805-9368Test

الوصول الحر: https://doaj.org/article/21fa83c171a946c9b00fcf30319bbf23Test

المؤلفون: Zachau Walker, Miriam Elisabeth

مصطلحات موضوعية: Electricity, Demand-side management (Electric utilities), Renewable resource integration, Engineering, Energy storage, Modeling, Energy transition, Renewable energy sources

الوصف: This thesis addresses the question: Can we characterize requirements for flexibility over different timescales in electricity systems dominated by solar and wind power? Storage and flexibility play an increasingly important role, but there is great uncertainty about amounts of flexibility needed and how they depend on generation mix and demand, including electrification of heating and transportation. Furthermore, to inform investment and planning, it is valuable to characterize the timescales over which flexibility will be needed, as different resources can be used to shift energy over different time horizons. To address this problem, the analysis uses the novel application of three methods to disaggregate overall flexibility requirements into short-, medium-, and long-term requirements, without relying on assumptions about technology parameters or costs. These methods are illustrated using the case of Great Britain and results are used to draw insights into GB flexibility needs under future scenarios. Flexibility is required over multiple timescales, from less than hourly to interseasonal or longer. Overcapacity of renewables provides value in terms of avoided storage costs, particularly displacing requirements for the longest duration storage, though generation capacity beyond 120% of demand yields diminishing marginal returns. Heating electrification has a larger impact than EVs, though flexible heating can partially offset additional power capacity needs. In all cases, the capacity required to shift energy by up to a day was on the order of 1 TWh; this could account for over half of all energy shifted depending on flexible resource operation. Electricity systems with at least 80% of energy from solar and wind require 3-150 TWh to shift energy by weeks or longer. The required capacity to shift energy by more than one year could potentially be avoided using renewables overcapacity, dispatchable generation, or interconnectors.

الوصول الحر: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.886715Test

المؤلفون: Mayuri, Tipale^{1, 1}, Shukla, R.N.¹, Balaji, Jadhav¹

المصدر: Asian Journal of Dairy and Food Research 42(2):137-143. 2023

المؤلفون: Kavita S. Raipurkar

المصدر: Environment Conservation Journal, Vol 25, Iss 1 (2024)

مصطلحات موضوعية: Biogas technology, National Biogas and Manure, Management Program (NBMMP), Renewable resource, Greenhouse gas emissions, Sustainable future, Environmental sciences, GE1-350

الوصف: India is facing a significant energy crisis due to its rapidly growing population, which is not being met by an equivalent increase in energy supply. According to the US Energy Information Administration, India's electricity consumption is projected to grow by 3.3% annually until 2035. Biogas technology, which converts waste into clean energy, offers a promising solution to this problem and accounts for 9% of global energy consumption. Despite being introduced in 1981, biogas technology's potential in India remains largely untapped, with only 7.34 MWe of off-grid projects generated by 2020. However, Tamil Nadu and Karnataka have significant potential for biogas generation. The National Biogas and Manure Management Program (NBMMP) have installed 5,056,139 biogas plants between 1981-82 and 2020-21, with Maharashtra being the top performer. India's agrarian economy provides ample raw materials for biogas generation, making it a crucial renewable resource for the country's energy crisis. Given the pressing need to address global warming, greenhouse effects, depleting fossil fuels, and pollution, biogas technology is essential for a cleaner, more sustainable future. Focusing on biogas technology can help India meet its increasing energy demands and contribute to a cleaner and more sustainable future. From 2018-19 to 2020-21, the NBMMP received a total allocation of INR 1,439,249,000.

وصف الملف: electronic resource

العلاقة: https://journal.environcj.in/index.php/ecj/article/view/2664Test; https://doaj.org/toc/0972-3099Test; https://doaj.org/toc/2278-5124Test

الوصول الحر: https://doaj.org/article/82096d64f15044c3922ac14edc907d16Test

المؤلفون: Abdurrahman Nazif Çatık, Çağla BUCAK, Esra Ballı, Müge Manga, Mehmet Akif Destek

مصطلحات موضوعية: Economic Impact of Environmental Policies and Resources, Economics and Econometrics, Economics, Econometrics and Finance, Social Sciences, Rebound Effect on Energy Efficiency and Consumption, Renewable Energy, Sustainability and the Environment, Energy, Physical Sciences, Life Cycle Assessment and Environmental Impact Analysis, Environmental Engineering, FOS Environmental engineering, Environmental Science, Energy Consumption, Environmental Impacts, Economic Growth, Global Energy Demand, Carbon Footprint, Economics, Non-renewable resource, Economic inequality, Ecological footprint, Consumption sociology, Globalization, Energy consumption, Cointegration, Renewable energy, Environmental quality, Inequality, Econometrics, FOS Economics and business

الوصف: This paper investigates the impacts of renewable and nonrenewable energy consumption, income inequality, and globalization on the ecological footprints of 49 countries for the period of 1995-2018. Panel cointegration test reveals a long-run relationship between the variables. Long-run parameter estimates derived from AMG and CCEMG, increasing income and nonrenewable energy consumption, have a significant positive impact on the ecological footprint, while countries that consume more renewable energy have seen an improvement in the quality of the environment. Conversely, neither income inequality nor globalization has a significant effect on national EFs. Evidence from the estimation of the panel threshold error correction model, where GDP growth is used as the transition variable, indicates a significant threshold effect, which supports a nonlinear relationship among the variables by identifying two distinct growth regimes: lower and upper. For the estimation sample, the positive and significant parameter ... : تبحث هذه الورقة في آثار استهلاك الطاقة المتجددة وغير المتجددة، وعدم المساواة في الدخل، والعولمة على الآثار البيئية لـ 49 دولة للفترة 1995-2018. يكشف اختبار التكامل المشترك للوحة عن علاقة طويلة المدى بين المتغيرات. إن تقديرات المعلمات على المدى الطويل المستمدة من AMG و CCEMG، وزيادة الدخل واستهلاك الطاقة غير المتجددة، لها تأثير إيجابي كبير على البصمة البيئية، في حين أن البلدان التي تستهلك المزيد من الطاقة المتجددة شهدت تحسنًا في جودة البيئة. وعلى العكس من ذلك، لا يؤثر عدم المساواة في الدخل ولا العولمة تأثيرًا كبيرًا على التدفقات المالية الإلكترونية الوطنية. تشير الأدلة من تقدير نموذج تصحيح خطأ عتبة اللوحة، حيث يتم استخدام نمو الناتج المحلي الإجمالي كمتغير انتقالي، إلى تأثير عتبة كبير، والذي يدعم علاقة غير خطية بين المتغيرات من خلال تحديد نظامين متميزين للنمو: السفلي والعلوي. بالنسبة لعينة التقدير، لا تدعم تقديرات المعلمات الإيجابية والهامة للنمو الاقتصادي في كلا نظامي النمو فرضية EKC. تشير النتائج إلى أن استهلاك الطاقة المتجددة وغير المتجددة له تأثير أكبر على الكهرومغناطيسية في الجزء العلوي من نظام النمو ...

العلاقة: https://dx.doi.org/10.60692/qnn0h-f3111Test

الإتاحة: https://doi.org/10.60692/we1rv-wqb0210.60692/qnn0h-f3111Test

المؤلفون: Ojonugwa Usman, Oktay Özkan, Ibrahim Adeshola, Babatunde Sunday Eweade

مصطلحات موضوعية: Economic Impact of Environmental Policies and Resources, Economics and Econometrics, Economics, Econometrics and Finance, Social Sciences, Rebound Effect on Energy Efficiency and Consumption, Renewable Energy, Sustainability and the Environment, Energy, Physical Sciences, Life Cycle Assessment and Environmental Impact Analysis, Environmental Engineering, FOS Environmental engineering, Environmental Science, Energy Consumption, Natural resource, Clean energy, Sustainability, Resource disambiguation, Non-renewable resource, Natural resource economics, Nexus standard, Renewable energy, Economics, China, Greenhouse gas, Environmental economics, Environmental science, Engineering, Computer science, Ecology, FOS Biological sciences

الوصف: The excessive use of non-renewable energy in 21st-century economic growth has continued to hurt the environment by accumulating carbon dioxide and other greenhouse gases. However, promoting environmental sustainability requires expanding clean energy utilisation. In this study, we examine the effects of clean energy expansion and natural resource extraction on load capacity factor (LCF) in China from 1970 to 2018. Using the dynamic autoregressive distributed lag simulations approach, we extend the standard load capacity curve (LCC) hypothesis by incorporating clean energy expansion and natural resource extraction as main determinants of the LCF. The empirical outcomes reveal that economic expansion is, although positively associated with the LCF, but its squared term degrades the LCF. This confirms that the LCC hypothesis is not valid for China. Moreover, while clean energy expansion has a positive effect on the LCF, the effect of natural resource extraction is negative. These effects are stronger ... : الخلاصة استمر الاستخدام المفرط للطاقة غير المتجددة في النمو الاقتصادي للقرن الحادي والعشرين في الإضرار بالبيئة من خلال تراكم ثاني أكسيد الكربون وغيره من غازات الدفيئة. ومع ذلك، يتطلب تعزيز الاستدامة البيئية توسيع نطاق استخدام الطاقة النظيفة. في هذه الدراسة، ندرس آثار توسع الطاقة النظيفة واستخراج الموارد الطبيعية على عامل سعة الحمولة (LCF) في الصين من 1970 إلى 2018. باستخدام نهج محاكاة التخلف الموزع الانحداري الذاتي الديناميكي، نقوم بتوسيع فرضية منحنى سعة الحمولة القياسية من خلال دمج توسيع الطاقة النظيفة واستخراج الموارد الطبيعية كمحددات رئيسية لمرفق سعة الحمولة. تكشف النتائج التجريبية أن التوسع الاقتصادي، على الرغم من ارتباطه بشكل إيجابي مع LCF، إلا أن مصطلحه التربيعي يحط من LCF. وهذا يؤكد أن فرضية المسؤولية المدنية المحلية غير صالحة للصين. علاوة على ذلك، في حين أن توسع الطاقة النظيفة له تأثير إيجابي على LCF، فإن تأثير استخراج الموارد الطبيعية سلبي. هذه التأثيرات أقوى وذات دلالة إحصائية على المدى الطويل فقط. لذلك، تسلط هذه الدراسة الضوء على إمكانات اقتصاد مستدام خالٍ من الكربون في الصين من خلال الاستثمار ليس ...

العلاقة: https://dx.doi.org/10.60692/3569y-2gx25Test

الإتاحة: https://doi.org/10.60692/hgjf4-g8y4410.60692/3569y-2gx25Test