scholarly journals Unlocking the potential of biosynthesized zinc oxide nanoparticles for degradation of synthetic organic dyes as wastewater pollutants

2021 ◽  
Author(s):  
Jaya Gangwar ◽  
Joseph Kadanthottu Sebastian
Keyword(s):  
Developing Countries ◽  
Zinc Oxide ◽  
Azo Dyes ◽  
Organic Dyes ◽  
Cost Effective ◽  
Water Bodies ◽  
Water Shortages ◽  
Degradation Of Dyes ◽  
Mechanism Of Degradation ◽  
Wastewater Pollutants

Abstract The azo dyes released into water from different industries are accumulating in the water bodies and bioaccumulating within living systems thereby affecting environmental health. This is a major concern in developing countries where stringent regulations are not followed for the discharge of industrial waste into water bodies. This has led to the accumulation of various pollutants including dyes. As these developing countries also face acute water shortages and due to the lack of cost-effective systems to remove these pollutants, it is essential to remove these toxic dyes from water bodies, eradicate dyes, or generate fewer toxic derivatives. The photocatalysis mechanism of degradation of azo dyes has gained importance due to its eco-friendly and non-toxic roles in the environment. The zinc nanoparticles act as photocatalysts in combination with plant extracts. Plant-based nanoparticles over the years have shown the potential to degrade dyes efficiently. This is carried out by adjusting the dye and nanoparticle concentrations and combinations of nanoparticles. Our review article considers increasing the efficiency of degradation of dyes using Zinc oxide (ZnO) nanoparticles and understanding the photocatalytic mechanisms in the degradation of dyes and the toxic effects of these dyes and nanoparticles in different tropic levels.

Perspective of Water Resources in Japan and in the World

1991 ◽  
Vol 23 (1-3) ◽  
pp. 11-18
Author(s):  
Tamon Ishibashi
Keyword(s):  
Developing Countries ◽  
Water Resources ◽  
Water Shortage ◽  
Water Shortages ◽  
The World

Recently, problems of water shortage are becoming global in both developed and developing countries. This is due to tremendous population increases and also urbanization and industrialization. In this paper, countermeasures for future water shortages are described.

Pollution, Toxicity and Carcinogenicity of Organic Dyes and their Catalytic Bio-Remediation

2019 ◽  
Vol 25 (34) ◽  
pp. 3645-3663 ◽  
Author(s):  
Muhammad Ismail ◽  
Kalsoom Akhtar ◽  
M.I. Khan ◽  
Tahseen Kamal ◽  
Murad A. Khan ◽  
...  
Keyword(s):  
Water Pollution ◽  
Textile Industry ◽  
Pathogenic Bacteria ◽  
Diarrheal Disease ◽  
Organic Dyes ◽  
Chemical Reduction ◽  
Cost Effective ◽  
Agricultural Runoff ◽  
E Coli ◽  
Sanitation Services

: Water pollution due to waste effluents of the textile industry is seriously causing various health problems in humans. Water pollution with pathogenic bacteria, especially Escherichia coli (E. coli) and other microbes is due to the mixing of fecal material with drinking water, industrial and domestic sewage, pasture and agricultural runoff. Among the chemical pollutants, organic dyes due to toxic nature, are one of the major contaminants of industrial wastewater. Adequate sanitation services and drinking quality water would eliminate 200 million cases of diarrhea, which results in 2.1 million less deaths caused by diarrheal disease due to E. coli each year. Nanotechnology is an excellent platform as compared to conventional treatment methods of water treatment and remediation from microorganisms and organic dyes. In the current study, toxicity and carcinogenicity of the organic dyes have been studied as well as the remediation/inactivation of dyes and microorganism has been discussed. Remediation by biological, physical and chemical methods has been reviewed critically. A physical process like adsorption is cost-effective, but can’t degrade dyes. Biological methods were considered to be ecofriendly and cost-effective. Microbiological degradation of dyes is cost-effective, eco-friendly and alternative to the chemical reduction. Besides, certain enzymes especially horseradish peroxidase are used as versatile catalysts in a number of industrial processes. Moreover, this document has been prepared by gathering recent research works related to the dyes and microbial pollution elimination from water sources by using heterogeneous photocatalysts, metal nanoparticles catalysts, metal oxides and enzymes.

scholarly journals Advances in Environmental Detection and Clinical Diagnostic Tests for Legionella Species

2021 ◽  
Author(s):  
Rajeshwari Vittal ◽  
Juliet Roshini Mohan Raj ◽  
Ballamoole Krishna Kumar ◽  
Indrani Karunasagar
Keyword(s):  
Developing Countries ◽  
Healthcare System ◽  
Diagnostic Tests ◽  
Clinical Manifestations ◽  
Cost Effective ◽  
Clinical Samples ◽  
Detection Techniques ◽  
Conventional Culture ◽  
Legionella Species ◽  
Mild Fever

Abstract Legionella is a fastidious organism that is difficult to culture in the lab but is widely distributed in environmental, domestic, and hospital settings. The clinical manifestations due to Legionella infections range from mild fever to fatal pneumonia and multiorgan pathologies. Legionella outbreaks though prevalent globally are not reported in developing countries due to difficulties in isolating this organism and the lack of simple diagnostic protocols. Here, we review the literature from across countries to present various methods used to detect Legionella from environmental and clinical samples. We compare the sensitivity and the specificity of the conventional culture-based assays with the recent methods and discuss approaches to develop better detection and diagnostic tests. With better cost-effective detection techniques and regular monitoring of the susceptible sites, which may harbor Legionella colonies, most of the Legionella infections can be prevented. As a result, considerable burden, caused by Legionella infections, on the healthcare system, in especially economically weaker countries, can be mitigated.

scholarly journals Energy Retrofitting Opportunities Using Renewable Materials—Comparative Analysis of the Current Frameworks in Bosnia-Herzegovina and Slovenia

2021 ◽  
Vol 13 (2) ◽  
pp. 603
Author(s):  
Darija Gajić ◽  
Slobodan Peulić ◽  
Tim Mavrič ◽  
Anna Sandak ◽  
Črtomir Tavzes ◽  
...  
Keyword(s):  
Developing Countries ◽  
Residential Buildings ◽  
Cost Effective ◽  
Primary Energy ◽  
Low Carbon ◽  
Resource Exploitation ◽  
Renewable Materials ◽  
Building Stock ◽  
Low Carbon Economy ◽  
Eu Member States

Sustainable approaches for retrofitting buildings for energy efficiency are becoming necessary in a time when the building sector is the largest energy consumer. Retrofitting building stock is effective for reducing global energy consumption and decreasing resource exploitation. Less developed EU member states and neighboring developing countries show reluctance towards healthy and renewable materials. Implementation of sustainable materials for energy retrofitting is slowed down due to gaps in legislation and effective strategic programs, availability of bio-based materials, lack of knowledge regarding use and maintenance of renewable products, and marketing lobbies. Use of bio-based materials in refurbishment is important due to their negative or low global warming potential (GWP), low primary energy (PEI) need for production, cost-effective benefits, and recycling/reuse potential. Role of environmentally friendly solutions and low-carbon economy growth is particularly relevant in developing countries, such as Bosnia-Herzegovina, that cannot afford innovative energy recovery systems, yet possess a significant amount of poorly managed building stock. This research aims to analyze frameworks regarding retrofitting of residential buildings in Bosnia-Herzegovina and Slovenia. The analysis tackles indirect causes, studies the legal background, and examines strategic frameworks; thus, it indicates potential barriers for implementation of recommended retrofitting solutions based on renewable materials.

Exploiting microbial biomass in treating azo dyes contaminated wastewater: Mechanism of degradation and factors affecting microbial efficiency

2021 ◽  
Vol 43 ◽  
pp. 102255
Author(s):  
Riti Thapar Kapoor ◽  
Mohammed Danish ◽  
Ram Sharan Singh ◽  
Mohd Rafatullah ◽  
Abdul Khalil H.P.S.
Keyword(s):  
Microbial Biomass ◽  
Azo Dyes ◽  
Factors Affecting ◽  
Mechanism Of Degradation ◽  
Microbial Efficiency

scholarly journals Incorporation of Kojic Acid-Azo Dyes on TiO2 Thin Films for Dye Sensitized Solar Cells Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Carolynne Zie Wei Sie ◽  
Zainab Ngaini
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Azo Dyes ◽  
Kojic Acid ◽  
Organic Dyes ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Thin Films ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Sensitization of heavy metal free organic dyes onto TiO2 thin films has gained much attention in dye sensitized solar cells (DSSCs). A series of new kojic acid based organic dyes KA1–4 were synthesized via nucleophilic substitution of azobenzene bearing different vinyl chains A1–4 with kojyl chloride 4. Azo dyes KA1–4 were characterized for photophysical properties employing absorption spectrometry and photovoltaic characteristic in TiO2 thin film. The presence of vinyl chain in A1–4 improved the photovoltaic performance from 0.20 to 0.60%. The introduction of kojic acid obtained from sago waste further increases the efficiency to 0.82–1.54%. Based on photovoltaic performance, KA4 achieved the highest solar to electrical energy conversion efficiency (η = 1.54%) in the series.

A simple and cost-effective zinc oxide thin film sensor for propane gas detection

2015 ◽  
Vol 157 ◽  
pp. 169-171 ◽  
Author(s):  
Vinoth Kumar Jayaraman ◽  
Arturo Maldonado Álvarez ◽  
María de la Luz Olvera Amador
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Cost Effective ◽  
Gas Detection ◽  
Oxide Thin Film ◽  
Zinc Oxide Thin Film ◽  
Film Sensor ◽  
Thin Film Sensor

Automotive Industry in BRIC Countries

2014 ◽  
pp. 55-65
Author(s):  
S. Afanas'ev ◽  
V. Kondrat’ev
Keyword(s):  
Developing Countries ◽  
Automotive Industry ◽  
Developing Economies ◽  
Cost Effective ◽  
State Regulation ◽  
Bric Countries ◽  
Final Assembly ◽  
Catching Up ◽  
The Future ◽  
Assembly Operations

For the next decade, the future of the automotive industry lies in BRIC’ countries. Together, Brazil, Russia, India, and China will account for some 30 percent of world auto sales in 2014 while also offering significant opportunities for cost-effective R&D, sourcing, and manufacturing. The authors analyze the degree of localization of leading TNC and supplies in each BRIC country, for each function, compare localization across BRIC countries, assess the future development of these markets, compare local capabilities and resources, and identify particularly promising combinations of functions and countries. Key trends in developing countries include continuing liberalization and globalization, increased foreign investment and ownership, and the increasing importance of follow-source and follow-design forces. The article concerns the trends and factors of national automotive industry formation in BRIC countries. Special emphasis is made on localization of R&D activities, final assembly operations and components production by global automotive companies in BRIC countries. It systemizes the factors of investment opportunities of different developing markets. It is concluded that active state regulation is playing the principle role in localization and catching-up process in automotive industry in developing countries. The comparison of the automotive industry in BRIC countries allows shedding light on the economic processes of emergence at large. There is a stark contrast in the capacities of development of the sector in these countries. This contrast serves as an analyzer between the modes of sector opening and the paths of technological catching-up that is the core of the phenomenon of emergence. The analysis and best practices presented in the topic, while focusing on the BRIC countries, are applicable also to other rapidly developing economies.

Use of cost-effective technologies for a routine clinical pathology laboratory

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Mercedes Vazquez ◽  
L. Anfossi ◽  
Hader Ben-Yoav ◽  
Lorena Diéguez ◽  
Thomas Karopka ◽  
...  
Keyword(s):  
Developing Countries ◽  
Clinical Pathology ◽  
Cost Effective ◽  
Limiting Factor ◽  
Economic Costs ◽  
Pathology Laboratory

Classically, the need for highly sophisticated instruments with important economic costs has been a major limiting factor for clinical pathology laboratories, especially in developing countries. With the aim of making...

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