Browsing by Author "K.K. Srivastava"

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Challenges and opportunities at the crossroads of Environmental Sustainability and Economy research
(Elsevier, 2021) Daniela Perrotti; Pramit Verma; K.K. Srivastava; Pardeep Singh
Cities occupy only nearly 3% of the world’s land surface. However, they account for over 75% of global natural resource consumption and contribute to about 70% of greenhouse gas emissions (UNEP International Resource Panel). Thus, human activities in cities are drivers of multiple environmental challenges, which are likely to increase with an expected rise of the global urban population by 70%-80% by 2050, and their effects extend over all the ecosystems of the world. Cities are human ecosystems where social, economic, biological, and ecological components work together forming a system of feedback loops and interactions. These interactions in urban ecosystems are guided through human values, agency, and perceptions. An ecological understanding of cities can help conceptualize them as key socioeconomic and environmental “nodes” where great potential exists for sustainability-oriented innovations in resource management and the mitigation of pollutant emissions, climate change, and other negative externalities of resource consumption. For several decades now, the need for sustainable development has emerged across different systems working in human societies on a global level. However, the challenge remains to integrate the environmental, social, and economic dimensions of sustainability. The focus of this chapter is to read environmental sustainability through a socioeconomic lens. In this context, the transition to innovative socioeconomic models and “metabolic” approaches has been explored here, learning from main insights from the chapters in this book. © 2021 Elsevier Inc. All rights reserved.
Effect of pH on removal of arsenic (III) by mixed adsorbents
(2008) A.P. Singh; K.K. Srivastava; H. Shekhar
The possibility of utilizing mixed adsorbent materials red mud with haematite and china clay and china clay with fly ash and red mud alone for the removal of As3+ from solution has been investigated in a batch type experiment. The effect of solution pH on adsorption process of low cost mixed adsorbents is reported and observed that favorable conditions are attained at an equilibrium time of 140 min and pH of 8 and maximum removal of As3+ in the range of 79-86%. The process of adsorption of As3+ is found to be time dependent and thus its removal is effective, economic and convenient.
Environmental Sustainability and Economy
(Elsevier, 2021) Pardeep Singh; Pramit Verma; Daniela Perrotti; K.K. Srivastava
Environmental Sustainability and Economy contains the latest practical and theoretical concepts of sustainability science and economic growth. It includes the latest research on sustainable development, the impact of pollution due to economic activities, energy policies and consumption influencing growth and environment, waste management and recycling, circular economy, and climate change impacts on both the environment and the economy. The 21st century has seen the rise of complex and multi-dimensional pathways between different aspects of sustainability. Due to globalization, these relationships now work at varying spatiotemporal scales resulting in global and regional dynamics. This book explores the complex relationship between sustainable development and economic growth, linking the environmental and social aspects with the economic pillar of sustainable development. Utilizing global case studies and interdisciplinary perspectives, Environmental Sustainability and Economy provides a comprehensive account of sustainable development and the economics of environmental protection studies with a focus on the environmental, geographical, economic, anthropogenic and social-ecological environment. © 2021 Elsevier Inc. All rights reserved.
Experimental study on thermal performance of pulsating heat pipe with al2o3-deionizedwater nanofluid at different orientations
(2013) B. Verma; V.L. Yadav; K.K. Srivastava
Thermal resistance as a function of heat load and start-up temperature with respect to time have been investigated for a pulsating heat pipe (PHP) at different inclination angles. PHP was made of 1.45 mm inner diameter copper tubes having 6 turns. Al2O3 nanofluid (concentration 0.25%, 0.5, 1.0, 1.25, 1.5, and 2.5% by wt.) with particle size 45 nm at an optimum filling ratio of 50% was used. It is found that as the concentration increases from 0.25% to 1.0% there is considerable decrease in thermal resistance as compared to that of the base fluid but as the concentration increases from 1.25% to 2.5% the thermal performance deteriorates. Optimum concentration of nanoparticles was 1.0% by wt. in base fluid with respect to start-up and thermal resistance for PHP in vertical orientation and 45. inclination, while in horizontal orientation 0.5% by wt. concentration showed the best results. Maximum decrease in thermal resistance with respect to deionized (DI) water was observed at 50Wfor 1.0% nanofluid concentration by wt. at 45. inclination, which was 33.6%. Heat transfer coefficients at evaporator and condenser are also investigated at vertical mode of operation. © 2013 by Begell House, Inc.
Floral biology of bael (Aegle marmelos) cultivars
(2000) K.K. Srivastava; H.K. Singh
[No abstract available]