02150nas a2200241   4500008004100000022001300041245012800054210006900182260000900251300001200260490000700272520127600279653002601555653002101581653002701602653002501629653003801654100002101692700002001713700002301733700002101756856013101777       2018                        eng d  a2210670700aSustainability assessment of brick work for low-cost housing: a comparison between waste based bricks and burnt clay bricks0 aSustainability assessment of brick work for lowcost housing a co  cFEB   a396-4060 v373 aManufacturing of bricks, using clay or fly ash, is one of the major contributors to greenhouse gas emissions as their manufacturing involves utilization of coal and cement. To overcome this limitation, alternative construction materials are developed by author using industrial and agro wastes like cotton mill waste, recycled paper mill waste, and rice husk ash. This work aims at performing a sustainability assessment of burnt clay bricks and bricks made of industrial and agro wastes used for brickwork in a low-cost house. The criteria considered for the assessment are economic, environmental, social, and technical aspects for manufacture of bricks and use of different bricks for brickwork. For the evaluation of environmental criterion, a life cycle assessment (LCA) tool is used. Overall sustainability index (SI) is calculated for alternatives based on the various criteria using MIVES approach. The relative SIs of clay and fly ash bricks, were 0.25 and 0.26, respectively. Overall, bricks made of industrial and agro wastes are found more sustainable with the highest SI for cotton waste bricks (0.94). Sensitivity analysis also confirmed that brickwork from waste based bricks is more sustainable compared to brickwork made from clay brick or fly ash brick.10aLife cycle assessment10aLow cost housing10aMulticriteria decision10aSustainability index10aSustainable construction material1 aJoglekar, S., N.1 aKharkar, R., A.1 aMandavgane, S., A.1 aKulkarni, B., D.  uhttps://library.ncl.res.in/content/sustainability-assessment-brick-work-low-cost-housing-comparison-between-waste-based-bricks02377nas a2200229   4500008004100000022001400041245010200055210006900157260000800226300001200234490000700246520158300253653002601836653002601862653001801888653001101906100002601917700002801943700002701971700002601998856012302024       2019                        eng d  a0944-134400aProcess development of silica extraction from RHA: a cradle to gate environmental impact approach0 aProcess development of silica extraction from RHA a cradle to ga  cJAN  a492-5000 v263 a<p>India is one of the major rice-producing countries. Rice husk is a major agricultural by-product from rice production, which is used as a fuel in boilers. Its use as fuel produces huge amounts of silica-rich rice husk ash (RHA). This paper aims at providing an overall assessment of environmental impacts associated with the extraction of silica from RHAa process developed by our study group. The functional unit used in this study is production of 100kg of silica. The analysis included the extraction and transportation of other raw materials; RHA was assumed to be processed at the site. The study was conducted in accordance with the international ISO 14040 procedural framework. LCA is performed using GaBi Education software, and five midpoint indicators are chosen to assess the environmental impacts of silica extraction. The overall climate change (CC) of the extraction process is 7.26kg CO2 equivalent per kg of silica produced. A high contribution of calcination to CC is attributed to the use of electricity. The comprehensive environmental impacts of silica-rich RHA resulting from processing of RHA and improvement options to achieve sustainable production are presented. The negative impacts that can be avoided during silica extraction are also discussed. It is observed that calcination is a major contributor to the overall environmental indicators. The work also stresses on the use of renewable energy for electricity generation, which would help in decreasing the overall greenhouse gas emissions during extraction while ensuring waste utilization.</p>10aEnvironmental impacts10aLife cycle assessment10aRice husk ash10asilica1 aJoglekar, Saurabh, N.1 aKharkar, Rhushikesh, A.1 aMandavgane, Sachin, A.1 aKulkarni, Bhaskar, D.  uhttps://library.ncl.res.in/content/process-development-silica-extraction-rha-cradle-gate-environmental-impact-approach02741nas a2200325   4500008004100000022001400041245014700055210006900202260000800271300001100279490000800290520162800298653002601926653001601952653001501968653001601983100002701999700002902026700003202055700001902087700001802106700002502124700001902149700003702168700002202205700002302227700001902250700001802269856012802287       2024                        eng d  a0959-652600aExtraction, characterization, and life cycle assessment of nanosilica from millet husk:  sustainable alternative with low environmental impact0 aExtraction characterization and life cycle assessment of nanosil  cFEB  a1409240 v4423 a<p>
	Eco-friendly approaches for silica production are highly researched to respond increasing industrial demand for bio-nanofillers. Herein, nanosilica of 10-20 nm with mesoporosity was obtained through a mild oxalic acid pre-treatment of millet husk, followed by calcination at 700 degrees C for 2 h. Compared with commercial precipitated silica (CS) and millet husk ash (MHA) directly obtained by calcination of the husk, the pre-treated silica (MHS) had higher purity, revealed using EDX spectroscopy. Moreover, FTIR and Si-29 NMR showed a higher condensation degree in MHS with 73% of Q4 siloxane bonds vs 4% in MHA. The release of the metal and organic impurities from the husk also allows to reduce the crystallinity of MHS, and to increase the specific surface area from 82 m(2)/g in MHA to 238 m(2)/g in MHS. The type II N-2 adsorption-desorption isotherms of MHA and MHS indicate aggregates of non-porous silica particles. MHS also demonstrated remarkable thermal resilience. According to the LCA analysis, MHS has a 40% lower impact on global warming, a 38% lower impact on human carcinogenic toxicity, and a 38% lower impact on terrestrial acidification compared to rice husk nanosilica. This research thus addresses sustainability challenges by repurposing millet husks, which are readily available due to continuous millet cultivation, particularly in India. By reducing the ecological impact of husk disposal through burning, this study offers an economically viable technology for high-purity silica production, aligning with global efforts to combat climate change and promote sustainable practices.</p>
10aLife cycle assessment10aMillet husk10aNanosilica10aOxalic acid1 aDominic, C., D. Midhun1 aRosa, Derval, dos Santos1 aBarbosa, Rennan, Felix da S1 aAnagha, O., V.1 aNeenu, K., V.1 aBegum, P., M. Sabura1 aKumar, Aswathy1 aParameswaranpillai, Jyotishkumar1 aSiriwong, Chomsri1 aAjithkumar, T., G.1 aShelke, Ankita1 aPasc, Andreea  uhttps://library.ncl.res.in/content/extraction-characterization-and-life-cycle-assessment-nanosilica-millet-husk-sustainable