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Recycling E-Waste for Sustainable Management of Natural Resources. In: Monitoring and Assessment of Natural Resources for Sustainable Management(National Conference MANRSM-2017, School of Environmental Earth Sciences, North Maharashtra University, Jalgaon)
(,,,,Year : 2017)
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Electronic waste (E-waste) which consists of old, end-of life, discarded electrical and electronic equipment’s (EEE), is the most rapidly growing MSW stream worldwide. The toxic and hazardous materials present in it can lead to severe environmental and occupational hazards, if not handled properly. However, presence of significant quantity of valuable recoverable material makes it a potential secondary resource for metal extraction. Composition of E-waste is complex with 38% ferrous material, 28% non-ferrous material, 19% plastic, 4% glass, 11% other (wood, rubber, ceramic, etc.). Although the precious materials are only 1% by weight, it accounts to nearly 80% of the total intrinsic value. Around $ 21 billion of Au and Ag are used in various EEE per annum.Along with precious metals it also contains various rare earth metals such as Platinum, Gallium, Indium, Lithium, etc. Primary metal extraction from mining has significant negative environmental impact due to substantial natural resources consumed and low recovery efficiency; comparatively extraction from E-waste is 50 times greater which is much more economical with lesser ecological foot printand the energy savings are considerable: aluminium 95%, copper 85%, iron and steel 74%, plastics 80%. This is the reason why E-waste recycling which is also called as “Urban Mining” can facilitate in sustainable management and conservation of rapidly depleting natural resources.
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Study of Valuable and Hazardous Metals from Capacitors of Personal Computer(NATIONAL CONFERENCE ON RECENT TRENDS IN CHEMICAL ENGINEERING AND TECHNOLOGY (REACT-2015), , LIT, Nagpur. )
(L J,,,,Year : 2016)
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Desktop personal computer (PC) is one of the major contributors of the waste electrical and electronic equipment’s (WEEE) generated worldwide. Composition of a typical desktop PC is complex and consists of hundreds of different materials which may be valuable, precious as well as hazardous in nature. Due to globalization and changing economic scenario, huge amount of E-waste is generated and its management has become a challenging task. The present paper highlights the various metals that can be recovered and recycle from the capacitors obtained from the printed circuit boards (PCB) of Central Processing Unit (CPU). Capacitors contain valuable (Aluminum, iron, copper, zinc, magnesium, manganese, nickel, etc.), hazardous (lead, chromium) and precious (silver) metals. The study of capacitors has been broadly undertaken following various systematic steps, which includes study of different types of capacitors present on the PCBs, its quantification, and characterizations studies. Effect of surface area on metal leaching efficiency was studied. It was observed that the electrolytic capacitors are present in higher quantity followed by solid electrolytic capacitors. Most of the valuable and hazardous metals were found in ceramic, film and solid electrolytic capacitors, also the metal leaching rate enhances by increasing surface area.
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Evaluation of the effect of size reduction and thermal treatment on metal extraction from PCBs of mother board and digital video drive of desktop PC(Current Science)
(,Vol. 110,5,,Year : 2015)
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The study aims at evaluating the effect of particle size and thermal treatment on printed circuit boards (PCBs) of Mother Board (MB) and DVD on metal extraction. Results show around 90-95% (w/w) and 35-40% (w/w) of total Al and Cu respectively, in CPU could be recovered by systematized disassembly. Remaining embedded Al and Cu require metallurgical or hydro-metallurgical processing. Cu extraction increases with size reduction. Thermal treatment of MB-PCB shows reduction in Cu extraction (23-38%) for all sizes in comparison without thermal treatment, while DVD-PCB showed surge in extraction after thermal treatment (41-141%) in comparison without thermal treatment.
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A review on water Resources Availability and management practices in India(Journal of Environmental Science and Engineering (JESE))
(,Volume 57,3,271-286,Year : 2015)
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Conservation and management of water resources is critically important for a vast and fast developing country like India. However, rapidly increasing population and continuous betterment of lifestyle has put tremendous pressure on water resources around major cities leading to alarmingly reduction in per capita water availability. Moreover, increasing fluctuations in precipitation over the country has only aggravated the problem. This paper presents the current and future water scenario in India and also discusses the impacts of various factors like population, pollution, mismanagement, climate change, government laws & regulations etc. on water resources and its availability. While emphasis has been laid on water productivity and various government initiatives, the paper also discusses and analyzes limitations in water management. Based on study and analysis, the paper finally recommends Best Management Practices (BMP) & Best Available Technologies (BAT) used & practiced worldwide for effective & efficient water management in India. The paper also highlights the importance of Public Private Community Partnership (PPCP) along with the recently developed monitoring tools and data information systems for sustainable & effective water resource management to meet present requirements without compromising the future needs.
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Management of E-waste(National Seminar on “Managing Health, Safety and Environment for Sustainable Development” held at Nagpur)
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,,,,Year : 2013)
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No information is available
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Mitigation of Air Pollution and Carbon Footprint by Energy Conservation through CFLs: A Case Study(Journal of Environmental Science and Engineering (JESE))
(,53,1,65-74,Year : 2011)
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Electricity consumption of compact fluorescent lamps (CFLs) is low, making them a useful tool for minimizing the rapidly increasing demand of electrical energy in India. The present study aims to project the likely electricity conservation in a scenario of complete replacement of existing Fluorescent Tubes (FTs) by CFLs at CSIR-NEERI (National Environmental Engineering Research Institute) vis a vis the financial repercussions and indirect reduction in emissions of greenhouse gases, eg CO, NO, CH, and other air pollutants, eg SO, NO, suspended particulate matter (SPM), black carbon (BC) and mercury (Hg) from coal fired thermal power plants. The calculations show that the Institute could save around 122850 kWh of electricity per annum, thereby saving approximately INR 859950/-(USD 1845386) towardselectricity cost perannum and would be able to minimize 4457908kg of Co-C'equivalent (over 100 year time horizon), 909 kg SO2, 982.8 kg NO, 9.8 kg of BC, 368.5 kg SPM, 18.4 Kg PM10 and 0.0024 kg Hg emissions per annum from a coal fired thermal power plant by conserving electricity at the institute level.
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