scholarly journals Photocatalysis: Activity of Nanomaterials

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 611
Author(s):  
Giuseppe Vitiello ◽  
Giuseppina Luciani
Keyword(s):  
Low Cost ◽  
Environmental Issues ◽  
Sustainable Technology ◽  
Photocatalytic Processes

Photocatalytic processes have shown great potential as a low-cost, green-chemical, and sustainable technology able to address energy and environmental issues [...]

Bamboo Towers: A Low-Cost and Sustainable Technology for Connecting the Unconnected Regions

2021 ◽  
Author(s):  
Siddhartha Ghosh ◽  
Allan Lambor Marbaniang ◽  
Ajmal Babu Mahasrankintakam ◽  
Radhika Pajgade ◽  
Subhrajit Dutta ◽  
...  
Keyword(s):  
Low Cost ◽  
Sustainable Technology

Composites Based on Thermoset Resin and Orbignya phalerata (Babassu Coconut): Evaluation of Mechanical Properties, Morphology and Water Sorption

2016 ◽  
Vol 869 ◽  
pp. 237-242
Author(s):  
Carlos Alberto Lopes Fonteles ◽  
Gustavo Figueiredo Brito ◽  
Laura Hecker Carvalho ◽  
Tatianny Soares Alves ◽  
Renata Barbosa
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Low Cost ◽  
Environmental Issues ◽  
Fiber Composites ◽  
Plant Fiber ◽  
Thermoset Resin ◽  
Superior Mechanical Properties ◽  
Polyester Matrix ◽  
Kinetics Of

Researches in plant fiber composites have been developed with greater frequency during the last years, especially on environmental issues. The opening of the market, especially in the automotive sector, points to the replacement of synthetic additives by natural reinforcements. Characteristics such as low density and abrasiveness, superior mechanical properties and low cost are the most sought in these composites. The aim of this study was to evaluate the behavior of composites based polyester matrix and fiber of the babassu coconut epicarp, at levels of 5, 7.5 and 10% under testing of tensile strength and impact, as well as the morphology by microscopy scanning electron and water absorption. All composites were prepared raw fibers and fiber with treated with alkaline solution of 5% NaOH. As regards the mechanical properties, an increasing of the rigidity of the system was observed, and the kinetics of water absorption increased levels indicated for compounds with high content of fibrous reinforcement. By SEM there was greater interaction between fiber and matrix.

Development of Portable CO2 Monitoring System

2013 ◽  
Vol 838-841 ◽  
pp. 2547-2551
Author(s):  
Chilin Liu ◽  
Thammita A. S. Anuruddha ◽  
Atsushi Minato ◽  
Satoru Ozawa
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Low Cost ◽  
Carbon Dioxide Concentration ◽  
Environmental Issues ◽  
Measurement Systems ◽  
The Earth ◽  
Global Environmental ◽  
The World ◽  
The Stability

Recently, the concern for global environmental issues has risen all over the world. The increment in concentration of the heat-trapping greenhouse gases that causes global warming in earth’s atmosphere became a serious problem. The level of the sea rises by melting glaciers when global warming advances it. Forecasting the changes of carbon dioxide concentration is a major issue to maintain the stability of the Earth and its species. The measurement of carbon dioxide is also important for agriculture and local industrialization. The density of carbon dioxide varies depending on the environment. The development of a low cost device that detects carbon dioxide density is discusses in this paper. We developed some measurement systems of carbon dioxide for various purpose.

scholarly journals Citizen Sensing: An Action-Orientated Framework for Citizen Science

2021 ◽  
Vol 6 ◽  
Author(s):  
Saskia Coulson ◽  
Mel Woods ◽  
Keyword(s):  
Data Collection ◽  
Citizen Science ◽  
Social Innovation ◽  
Low Cost ◽  
Environmental Issues ◽  
Environmental Challenges ◽  
European Project ◽  
Citizen Sensing ◽  
The Cross ◽  
Future Practice

Citizen Sensing, a correlative of Citizen Science, employs low-cost sensors to evidence local environmental issues and empowers citizens to use the data they collect. Whilst motivations for participation can vary, communities affected by pollution frequently have changemaking as their goal. Social innovation is closely aligned with citizen sensing, however the process of co-creating practices and solutions with citizens who wish to shape their world can be highly complex to design. Therefore, our research articulates an action-orientated framework which emerges from a 2-year pan European project by which follow-on communities may replicate sensing initiatives more easily. The authors examine five studies and explore the cross-cutting principles, phases, stakeholders, methods, and challenges which form this framework. The authors argue that whilst data collection and data awareness are crucial to the citizen sensing process, there are precursory and subsequent stages which are necessary to equip citizens to address complex environmental challenges and take action on them. Therefore, this paper focuses on the stages and methods which are distinctive to citizen sensing. It concludes with recommendations for future practice for citizen sensing and citizen science.

Recovery of Cellulose Nanofiber from Lignocellulosic Biomass: Recent Trends and Applications

2020 ◽  
Vol 16 ◽  
Author(s):  
Ria Majumdar ◽  
Umesh Mishra ◽  
Muthusivaramapandian Muthuraj ◽  
Biswanath Bhunia
Keyword(s):  
Lignocellulosic Biomass ◽  
Low Cost ◽  
Cellulose Nanofibers ◽  
Environmental Pollutants ◽  
Extraction Procedure ◽  
Environmental Issues ◽  
Cellulose Nanofiber ◽  
Physico Chemical ◽  
Recent Trends ◽  
Tuning Strategy

Background: Plant is considered as an important feedstock for cellulose, although, algae can be used as reservoir for extraction of cellulose in its pure form. Cellulose nanofiber extracted from plant and algae gains more attention among researchers, due to their size in nano range, low cost for preparation, higher surface area available for tuning, outstanding mechanical properties and eco-friendly nature. However, the quality of nanofiber depends on extraction procedure and feedstock used for the extraction of them. Furthermore, the extracted nanofiber from lignocellulosic biomass is not compatible with liquid and polymeric matrices due to less amount of functional groups available on the surface of them. Therefore, it is urged to comprehend the explicit protocol required for extraction of highly resourceful nanofiber from specific lignocellulosic biomass and surface tuning strategy, which can augment their application in various fields. The present review targets to understand the various polysaccharides, lignin and production of cellulose nanofibers in an economical & efficient way with special attention on its implementation in environmental applications to mitigate the toxic pollutants from our surroundings. Methods: Research articles related to the cellulose types, feedstocks, physico-chemical features, various extraction and conversion techniques, functionalization methods, and applications on mitigating environmental pollution were collected and reviewed. This review article comprises sections which details various cellulose and nanocellulose types, feedtsocks, followed by their extraction, characterization and applications in mitigation of environmental issues such as heavy metal contaminations. Results: Studies highlighted in the article detailed types of extraction protocols, so far developed and strategies applied to improve the salient properties of nanofiber for specific applications are enlighten. Conclusion: The functionalized or modified cellulose and nanocellulose have gained significant interest attributed to their unique attributes, physico-chemical characteristics and efficiency in recovery of environmental pollutants. Thus, further exploitation of such natural resources in mitigation of various environmental issues and other realted applications are to be maximized.

Melt Flow and Mechanical Properties of Polypropylene/Recycled Plaster of Paris

2013 ◽  
Vol 315 ◽  
pp. 905-908 ◽  
Author(s):  
S.S. Jikan ◽  
I. Mat Arshat ◽  
Nur Azam Badarulzaman
Keyword(s):  
Composite System ◽  
Low Cost ◽  
Environmental Issues ◽  
Strengthening Mechanism ◽  
Environmental Issue ◽  
Plaster Of Paris ◽  
Phase Dispersion ◽  
The Matrix ◽  
Ceramic Manufacturing ◽  
The Government

Polypropylene (PP) composites have better material properties such as good strength, better stiffness, improve of ductility; good stability and thermal expansion; and low cost of production. Nevertheless, these properties depend on the matrix phase, the phase dispersion of fillers and strengthening mechanism, shapes and arrangements of filler particles and the bonding interface between filler and matrix [1]. Plaster of paris (POP) has been chosen as filler in this composite system because it is used in many ceramic manufacturing and construction sectors which produce lots of POP wastes. It becomes one of the environmental issues due to the amount of used POP that has been disposed without recycling. Therefore, it is crucial to develop new composite material which consists of recycled POP as filler in order to assist the government in addressing the environmental issue.

scholarly journals Demographic profile, production and marketing management of native pig raisers in the three largest island in the province of Romblon, Philippines

2021 ◽  
Vol 22 ◽  
pp. 852-869
Author(s):  
Ken N. Falculan
Keyword(s):  
High School ◽  
Research Design ◽  
Personal Experience ◽  
Production Management ◽  
Low Cost ◽  
Environmental Issues ◽  
Monthly Income ◽  
School Graduate ◽  
Descriptive Research ◽  
The Family

This study was conducted to determine and evaluate production, management, marketing practices and the profitability of production of native pig raisers in the three largest island in the Province of Romblon. This study used the descriptive research design, the data gathered were statistically analyzed using frequency/percentage and mean. From the analysis and interpretation conducted it was found out that the oldest pig raisers is 73 years old, female, married, high school graduate, engage in farming with estimated monthly income of P3,000-5,000, having 3 members in the family and manage pigs through personal experience; adopted combination of fattening and breeding, with a meager capital and raised 3- 4 pigs throughout the years of raising swine; breed through natural mating and the source of boar is within the pigpen and others from rental/sharing. The pigs were fed with a combination of commercial, local and leftover feeds using a movable federer. Majority of the piggeries were located at the upland areas, tethered, tied under the tree and the pigpen was constructed at the ground; buried their carcass waste to avoid common environmental issues; and the majority of the pig raisers applied antibiotics to cure diseases in their pigs. The pig raisers always rear pigs to meet emergency household expenses; never sell pigs in terms of barter or exchange of other goods; and due to low cost requirements.

scholarly journals Green when seen? No support for an effect of observability on environmental conservation in the laboratory: a registered report

2020 ◽  
Vol 7 (4) ◽  
pp. 190189 ◽  
Author(s):  
Florian Lange ◽  
Cameron Brick ◽  
Siegfried Dewitte
Keyword(s):  
Low Cost ◽  
Environmental Issues ◽  
Comprehensive Analysis ◽  
Environmental Conservation ◽  
Prosocial Behaviour ◽  
Laboratory Procedure ◽  
Methodological Choices ◽  
Energy Conserving ◽  
Led Lights ◽  
Wasted Energy

Understanding how humans navigate the tension between selfish and prosocial behaviour is central to addressing social dilemmas and several environmental issues. Many accounts predict that human prosociality would increase in the presence of observing individuals. Previous studies on this observability effect predominantly relied on artificial observability manipulations and low-cost measures of prosociality. In the present Registered Report, we used a recently validated laboratory procedure of repeated dilemmas to test whether the presence of actual observers affects costly prosocial behaviour in the domain of environmental conservation. When completing this dilemma task, participants repeatedly chose between minimizing the length of the laboratory session and minimising wasted energy from a bank of LED lights. Their choices were made either in private or in the presence of actual observers. Contrary to our expectation, we did not observe higher rates of energy-conserving behaviour when participants' choices were being observed. Manipulation and robustness checks indicate that this lack of a finding is unlikely to be owing to arbitrary methodological choices. In view of these findings, we argue that a more comprehensive analysis of situation- and behaviour-specific consequences might be necessary to predict how particular behaviours are affected by observability.

scholarly journals Template free mild hydrothermal synthesis of core–shell Cu2O(Cu)@CuO visible light photocatalysts for N-acetyl-para-aminophenol degradation

2019 ◽  
Vol 7 (36) ◽  
pp. 20767-20777 ◽  
Author(s):  
Sekar Karthikeyan ◽  
Chitiphon Chuaicham ◽  
Radheshyam R. Pawar ◽  
Keiko Sasaki ◽  
Wei Li ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Environmental Remediation ◽  
Light Harvesting ◽  
Low Cost ◽  
Core Shell ◽  
Earth Abundant ◽  
Template Free ◽  
Photocatalytic Processes

Solar photocatalytic processes are a promising approach to environmental remediation, however their implementation requires improvements in visible light harvesting and conversion and a focus on low cost, Earth abundant materials.

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