scholarly journals Sunlight-assisted degradation of textile pollutants and phytotoxicity evaluation using mesoporous ZnO/g-C3N4 catalyst

RSC Advances ◽  
2021 ◽  
Vol 11 (43) ◽  
pp. 26800-26812
Author(s):  
H. Leelavathi ◽  
N. Abirami ◽  
R. Muralidharan ◽  
Helen P. Kavitha ◽  
S. Tamizharasan ◽  
...  

Accessibility of adequate safe and fresh water for human consumption is one of the most significant issues throughout the world and extensive research is being undertaken to resolve it.

2022 ◽  
Vol 12 ◽  
Author(s):  
Michelle F. O’Brien ◽  
Sarah Pellett

Gastropods (class Gastropoda) form the largest of the classes in the phylum Mollusca and inhabit terrestrial, fresh water and marine environments. A large number of these species are of major conservation importance and are an essential component of ecosystems. Gastropods may be deemed as pests, having a negative impact in horticulture and agriculture, whereas others may be used as a food source for human consumption and therefore are beneficial. Gastropods are susceptible to primary diseases and also act as intermediate hosts for diseases which affect other animals, including humans. The diseases described include two that are notifiable to the World Organisation for Animal Health (OIE): Xenohaliotis californiensis and Abalone viral ganglioneuritis caused by Haliotid herpesvirus-1 (HaHV-1). Research into the diseases of gastropods has often focused on those species that act as intermediate disease hosts, those that are used in research or those cultured for food. In this paper we review the viral, bacterial, fungal, parasitic and miscellaneous conditions that have been reported in gastropods and mention some of the factors that appear to predispose them to disease. The pathogenicity of a number of these conditions has not been fully ascertained and more research is needed into specifying both the etiological agent and significance in some of the diseases reported.


2021 ◽  
Vol 5 ◽  
pp. 239784732199752
Author(s):  
Eni-yimini Solomon Agoro ◽  
Charles German Ikimi ◽  
Tommy Edidiong

Background: The World Health Organization (WHO) has estimated drowning as the leading cause of unintentional death in the world, with 372,000 deaths reported annually. Not all drowning are unintentional; some could be disguised to cover up an act of heinous criminality. This study was aimed at using some vitreous renal function biochemical parameters as a discriminant of postmortem fresh water drowning. Twelve albino rabbits constituted the sample size as validated by Mead’s formula. The study was divided into three groups; the control, postmortem-drowned and truly drowned as mimicked using an artificial fresh water pond. Vitreous humours were extracted using Coe method. The vitreous renal chemistries were analysed using diacetyl monoxime, Jaffe’s test, uricase and ion-selective electrode (ISE) methods respectively. Result: The mean of vitreous creatinine, urea, uric acid, Na+, K+, Cl−, Ca2+, glucose and CO2 of the control, postmortem-drowned and truly drowned groups were compared using One-way Anova (post-hoc-LSD) with the aid of SPSS Inc., Chicago, IL, USA; Version 18–21 package. The findings revealed a significant increase in concentrations of vitreous creatinine, glucose, Ca2+ and K+ of the drowned death group, whereas vitreous concentrations of CO2 and urea significantly decreased when compared to the controls and/or postmortem-drowned death. Conclusion: The study has shown that some of the studied vitreous biochemical parameters could be used as an ancillary tool in discriminating death due to fresh water drowning from that of disguised or postmortem-drowned death.


2014 ◽  
Vol 592-594 ◽  
pp. 2409-2415 ◽  
Author(s):  
S. Naga Sarada ◽  
Banoth Hima Bindu ◽  
Sri Rama R. Devi ◽  
Ravi Gugulothu

In recent years with the exacerbation of energy shortage, water crisis increases around the world. With the continuous increase in the level of greenhouse gas emissions, the use of various sources of renewable energy is increasingly becoming important for sustainable development. Due to the rising oil price and environmental regulations, the demand of utilizing alternative power sources increased dramatically. Alternative energy and its applications have been heavily studied for the last decade. Energy and water are essential for mankind that influences the socioeconomic development of any nation. Pure water resources become more and more scarce every day as rivers, lakes wells and even seawater pollution rapidly increases. Solar energy is one promising solution to secure power and potable water to future generation. The process of distillation can be used to obtain fresh water from salty, brackish or contaminated water. Water is available in different forms such as sea water, underground water, surface water and atmospheric water. Clean water is essential for good health. The search for sustainable energy resources has emerged as one of the most significant and universal concerns in the 21st century. Solar energy conversion offers a cost effective alternative to our traditional usages. Solar energy is a promising candidate in many applications. Among the alternative energy sources used for electricity production, wind and solar energy systems have become more attractive in recent years. For areas where electricity was not available, stand alone wind and solar systems have been increasingly used. The shortage of drinking water in many countries throughout the world is a serious problem. Humankind has depended for ages on river, sea water and underground water reservoirs for its fresh water needs. But these sources do not always prove to be useful due to the presence of excessive salinity in the water. To resolve this crisis, different methods of solar desalination have been used in many countries. Distillation is a well known thermal process for water purification, most importantly, water desalination. Most of the conventional water distillation processes are highly energy consuming and require fossil fuels as well as electric power for their operation. Single basin solar still is a popular solar device used for converting available brackish or waste water into potable water. Because of its lower productivity, it is not popularly used. Numbers of works are under taken to improve the productivity and efficiency of the solar still. There are large numbers of PCMs that melt and solidify at wide range of temperatures, making them attractive in a number of applications. PCMs have been widely used in latent heat thermal storage systems for heat pumps, solar engineering and spacecraft thermal control applications. The use of PCMs for heating and cooling applications for buildings has been investigated within the past decade. The experimental results computed in the field of water distillation process using solar energy in the presence of energy storage materials sodium sulphate and sodium acetate are discussed in this paper. Keywords: solar energy, saline water, distillation, phase change material.


2020 ◽  
Author(s):  
Hashim Yaqub ◽  
Martin Kemp

Over the past year the world has changed dramatically. With greater restrictions on accessibility, the need to provide innovative and distributable remote experiences is now more prominent than ever. BMT has partnered with the SS Freshspring Trust to create multi-generational STEM experiences. “Preserving the past to inspire knowledge for the future”. The SS Freshspring Trust have a vision to become a STEM hub by utilising cutting-edge technology. BMT have extensive experience in developing VR applications in the Maritime Domain. With skills shortfalls in many engineering disciplines, there is a need to inspire future generations into careers in STEM. Equally, many adults have a passion for technology and have valuable skills to offer to STEM projects. This paper uses the historic vessel SS Freshspring, a 1940s RFA Fresh Water Carrier currently being restored in North Devon, as the basis for exploring a range of initiatives and activities aimed at making engineering and technology interesting and accessible to all. The specific focus is on the development of an interactive 3D virtual tour, aiming to provide access to a wide audience by targeting a range of modalities including smartphones, internet browsers, and most consumer VR headsets.


Soundings ◽  
2021 ◽  
Vol 78 (78) ◽  
pp. 50-63
Author(s):  
Dipesh Chakrabarty ◽  
Ashish Ghadiali

The notion of the planetary allows us to distinguish between the global of globalisation and the global of global warming. Globalisation is the process through which humans created the world we live in, how we converted the planet into a spherical human domain, at the centre of which are the human stories of technology, empires, capitalism and inequality. Global warming is what has resulted at the planetary level as intensified human consumption of the globe's resources has turned humanity into a geological agent of change. The global is 500 years old, while the planetary is as old as the age of the earth. The physical world has its own deep history: over time it has experienced profound changes. If climate change is to be addressed this mutability must be recognised – the unchanging nature of the world can no longer be taken for granted. The interview covers the rise of atmospheric sciences during the Cold War, when the Earth became, effectively, part of a comparative study of planets; the relationship between Marxism and the idea of 'deep history'; the human-made ecological disaster of bush-fires in Australia; the influence of Rohith Vemula and Rabindranath Tagore on planetary thinking and ideas about connectivity; biopower, zoe and the pandemic; and the difficulty of thinking politically about deep history.


Author(s):  
Heiner Stuckenschmidt

The World Wide Web today is a huge network of information resources which was built in order to broadcast information for human users. Consequently, most of the information on the Web is designed to be suitable for human consumption: the structuring principles are weak, many different kinds of information co-exist, and most of the information is represented as free text.


Author(s):  
Ann T. Jordan

Business anthropology is a fast-evolving field. Social sciences such as sociology, psychology, and anthropology each have a unique set of constructs and theories for studying human behavior and each brings special insights to understanding business. Anthropologists are skilled in observing and learning from the rich interaction of social beings in their environment. With methods based in techniques for first-hand observation and interviewing of participants, and with theoretical knowledge gleaned from studying human societies across the world, anthropologists are the social scientists uniquely situated by training to analyze the social milieu and group-patterned interaction in any human setting. Simply, business anthropology is the use of anthropological constructs, theory, and methods to study its three subfields: organizations, marketing and consumer behavior, and design. Organizational anthropology is the study of complex organizations from an anthropological perspective to solve organizational problems or better understand the nature and functioning of the organizational form within and across organizations. In marketing and consumer behavior anthropology’s methods allow one to get close to consumers and understand their needs, while anthropology’s theoretical perspectives allow one to understand how human consumption plays out on the world stage. In the design field anthropologists use their methods to observe and learn from the detailed interaction of social beings in the designed environments in which we all live. They use their theoretical perspectives to develop a holistic analysis of the rich data to develop new products and evaluate and improve existing ones whether they be refrigerators or office buildings. The field of business anthropology is difficult to define because the moniker “business anthropology” is a misnomer. This field, as most anthropologists practice it, is not limited to work in for-profit businesses. Business anthropologists work with for-profit organizations, but also non-profit ones, government organizations and with supranational regulatory bodies. In addition to working for a business, an organizational anthropologist might be working in a non-profit hospital to improve patient safety, a design anthropologist might be working for an NGO to develop a less fuel-intensive cooking system for refugee camps and an anthropologist in marketing might be working in a government agency to develop ways to advertise new vaccines.


2019 ◽  
Vol 9 (16) ◽  
pp. 3278
Author(s):  
Julio Mendoza-Escamilla ◽  
Francisco Hernandez-Rangel ◽  
Pedro Cruz-Alcántar ◽  
María Saavedra-Leos ◽  
Josefa Morales-Morales ◽  
...  

Worldwide, the shortage of fresh water has increased exponentially due to population growth and contamination of available water, especially in water tables that provide water for general consumption. One of the main pollutants of water is arsenic (As), present in the environment and in most mining/metallurgical processes, which is a major health risk, especially as a carcinogen. In the region of Matehuala, San Luis Potosi (SLP), Mexico, a highly productive mining area, arsenic concentrations of 138.1 mg/kg have been found in soils—6.2 times higher than what is allowed in domestic soils, while in water it is reported up to 158 mg/L, exceeding permissible limits for human consumption. In addition to As pollution, the region suffers from water shortage both in the city and in rural communities. Therefore, it is necessary to explore new technologies to provide the population with fresh water. This paper presents a feasibility study on the use of an atmospheric water generator (AWG) to capture fresh water in the region of Matehuala, SLP. The region was found to have the necessary environmental conditions to use AWGs, with an annual average relative humidity (RH) of approximately 60%. Using a mathematical model of a dehumidifier, water harvesting can be evaluated under the region’s prevailing climatic conditions. The month with lowest harvest was found to be January, with 0.89 to 3.6 L/day, while the month with largest harvest was August at 3.9 to 18 L/day and water production costs of 0.0093 and $ 0.038 USD/L, respectively. The study concludes that the use of AWGs would help alleviate water shortages, thus benefiting marginalized people or communities, preserving ecosystems and the environment.


Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 119 ◽  
Author(s):  
Ihsan Ullah ◽  
Mohammad Rasul

Fresh water resources are depleting rapidly as the water demand around the world continues to increase. Fresh water resources are also not equally distributed geographically worldwide. The best way to tackle this situation is to use solar energy for desalination to not only cater for the water needs of humanity, but also to offset some detrimental environmental effects of desalination. A comprehensive review of the latest literature on various desalination technologies utilizing solar energy is presented here. This paper also highlights the environmental impacts of desalination technologies along with an economic analysis and cost comparison of conventional desalination methods with different solar energy based technologies. This review is part of an investigation into integration of solar thermal desalination into existing grid infrastructure in the Australian context.


1996 ◽  
Vol 1996 ◽  
pp. 105-105 ◽  
Author(s):  
S.P. Simpkin ◽  
P. Rowlinson

Estimates of camel lactation yields in the literature vary from less than 1000kg to more than 12000 kg, with mean daily yields from 0.1 to 35kg (Simpkin 1985). Suckling or milking frequency and strength of the milk letdown reflex are just two of many factors that affect milk secretion rate in camels. Most of the 18 million camels in the world are kept in nomadic pastoral herds where estimation of milk yield is particularly difficult and the large variation in reported camel milk yields could be attributed to the methodology used to estimate yields. A literature survey shows most articles are based on infrequent observations on small numbers of animals over a short period of lactation and fail to state the experimental conditions or whether figures represent milk offtake for human consumption or total milk yield.


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