Nanobiocatalysts and photocatalyst in dye degradation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Smilin Bell Aseervatham G ◽  
Arul Ananth Devanesan ◽  
Doulathunnisa Jaffar Ali
Keyword(s):  
Dye Degradation ◽  
Manufacturing Industries ◽  
Water Bodies ◽  
Polluted Water ◽  
Paper Pulp ◽  
The World ◽  
Stable Manner ◽  
Pharmaceutical Industries ◽  
Modern Era ◽  
Natural Water Bodies

Abstract In the modern era, the world today is in a mission for a new method of environmental bioremediation in faltering the damage, especially in polluted water. Recently, the global direction is regulated toward an alteration from the usual chemical-based methods to a supplementary ecofriendly green alternative. In this perspective, biocatalysts are appreciated as an economical and clean substitute which was meant to catalyze degradation of unmanageable chemicals in a rapid, green and ecologically stable manner. Among the various sources of water pollution, the textile manufacturing industries were thought to be a major dispute due to release of effluents in natural water bodies such as rivers. Other industries like paper, pulp and tannery pharmaceutical industries were also responsible in contaminating the water bodies. Photocatalysis was considered as an auspicious method for the removal of dyes from the natural bodies, specifically those with hard organic compounds; using enzymes. The present chapter briefly emphasizes on the effective methods used for degradation of dye effluents; their importance of photocatalytic and biocatalytic solution to the current environmental difficulties and future opportunities are discussed.

scholarly journals Surveillance of mosquitoes (Diptera: Culicidae) in Rajshahi, Bangladesh

2019 ◽  
Vol 6 (2) ◽  
pp. 329-336
Author(s):  
Md Tanvir Anjum Anik ◽  
Thahsin Farjana
Keyword(s):  
Public Health ◽  
Mosquito Species ◽  
Water Bodies ◽  
Polluted Water ◽  
Agricultural Fields ◽  
Light Traps ◽  
Anopheles Species ◽  
Breeding Sites ◽  
Arthropod Vectors ◽  
The World

Mosquitoes are considered the most important arthropod vectors in the world. Mosquito borne diseases are major public health problems in most of tropical and subtropical countries. An investigation was performed at Bagha upazila in Rajshahi district to identify the mosquito species and their breeding sites at the study area. Adult mosquitoes were collected by insect collecting net, light traps and human bait method and larvae were collected by dipper, mug, ladle spoon and dropper. A total of 1947 adult mosquitoes and 1376 larvae were collected and identified. Total ten species of adult mosquitoes and nine species of larvae under two genera were identified. The collected mosquitoes were belonging to two genera- Anopheles (An.) and Culex (Cx.). The identified species were Cx. quinquefasciatus, Cx. bitaeniorhynchus, Cx. tritaeniorhynchus, Cx. gelidus, Cx. pseudovishnui, Cx. whitmorei, Cx. fuscanus, Cx. fuscocephala, An. aconitus, An. vagus and An. barbirostris. In both cases of larvae and adult mosquitoes, Culex was found more prevalent than Anopheles. In case of larvae the prevalence was 75.8% and 24.2%, and in case of adult it was 71.2% and 28.8% for Culex and Anopheles, respectively. Among the all identified mosquitoes, Cx. quinquefasciatus showed the highest abundance in both cases of larval (23.5%) and adult mosquitoes (25.2%). From the survey it has been apparent that the Culex species may prefer the polluted water bodies in the locality like households, dairy sheds and drains whereas Anopheles species may prefer agricultural fields, and dairy sheds. This study will help to detect the breeding sites of mosquitoes in study areas and to take necessary steps to control mosquitoes and mosquito borne diseases. Res. Agric., Livest. Fish.6(2): 329-336, August 2019

Assessment of the Influence of the Invasive Species Pistia stratiotes (Araceae) on Some Species of Submerged Macrophytes of Natural Water Bodies of Ukraine

2017 ◽  
Vol 53 (5) ◽  
pp. 75-84
Author(s):  
O. P. Olkhovich ◽  
N. Yu. Taran ◽  
N. B. Svetlova ◽  
L. M. Batsmanova ◽  
M. V. Aleksiyenko ◽  
...  
Keyword(s):  
Invasive Species ◽  
Natural Water ◽  
Submerged Macrophytes ◽  
Water Bodies ◽  
Pistia Stratiotes ◽  
Natural Water Bodies

Nuclear Strategy in the Modern Era

2014 ◽  
Author(s):  
Vipin Narang
Keyword(s):  
Deterrent Effect ◽  
Regional Power ◽  
Nuclear Forces ◽  
Regional Powers ◽  
Nuclear Strategy ◽  
Weak Institutions ◽  
Nuclear Age ◽  
International Stability ◽  
The World ◽  
Modern Era

The world is in a second nuclear age in which regional powers play an increasingly prominent role. These states have small nuclear arsenals, often face multiple active conflicts, and sometimes have weak institutions. How do these nuclear states—and potential future ones—manage their nuclear forces and influence international conflict? Examining the reasoning and deterrence consequences of regional power nuclear strategies, this book demonstrates that these strategies matter greatly to international stability and it provides new insights into conflict dynamics across important areas of the world such as the Middle East, East Asia, and South Asia. The book identifies the diversity of regional power nuclear strategies and describes in detail the posture each regional power has adopted over time. Developing a theory for the sources of regional power nuclear strategies, the book offers the first systematic explanation of why states choose the postures they do and under what conditions they might shift strategies. It then analyzes the effects of these choices on a state's ability to deter conflict. Using both quantitative and qualitative analysis, the book shows that, contrary to a bedrock article of faith in the canon of nuclear deterrence, the acquisition of nuclear weapons does not produce a uniform deterrent effect against opponents. Rather, some postures deter conflict more successfully than others. This book considers the range of nuclear choices made by regional powers and the critical challenges they pose to modern international security.

KONSEP IMPLEMENTASI PENANAMAN AKHLAK SISWA BERBASIS NILAI-NILAI ISLAM

Edupedia ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 5-9
Author(s):  
Siti Amilus Soleha
Keyword(s):  
Educational Institutions ◽  
The World ◽  
Modern Era

At this modern era, the interaction of students cannot always be limited by some bulkheads. Interactivity can occur in any direction and at any time. Moral decadence always developed along with problem solved that had never ended. In the world of educational institutions, teachers have a very strategic and urgent position in fostering the morals of students. Moral in education is an effort made to provide guidance to students, so that their behavior is in accordance with Islamic guidance, so they can distinguish between good behavior and bad behavior. The morals that must be taught to students include morality to Allah SWT and morality to humans.

Prevalence and distribution of different diarrhoeagenicEscherichia colivirulotypes in major water bodies in Bangladesh

2013 ◽  
Vol 141 (12) ◽  
pp. 2516-2525 ◽  
Author(s):  
S. AKTER ◽  
M. ISLAM ◽  
K. S. AFREEN ◽  
N. AZMUDA ◽  
S. I. KHAN ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Regional Distribution ◽  
Distribution Patterns ◽  
Aquatic Systems ◽  
Water Bodies ◽  
Virulence Determinants ◽  
Waterborne Pathogen ◽  
E Coli ◽  
Enriched Cultures ◽  
Natural Water Bodies

SUMMARYEscherichia coli, a prominent waterborne pathogen, causes a variety of gastrointestinal and extraintestinal infections that depend on virulence determinants. To monitor natural aquatic systems for virulence-associated genes ofE. coli, multiplex PCR was used in a survey covering 46 major natural water bodies in Bangladesh. DNA was extracted directly from water samples as well as from pre-enriched and enriched cultures during three successive seasons and assessed forE. colivirulotype distribution. From the five virulotypes, genes from the enterotoxigenic (ETEC), enteropathogenic (EPEC), and enterohaemorrhagic (EHEC) virulotypes were detected consistently, but genes from the enteroinvasive (EIEC) and enteroaggregative (EAEC) virulotypes were traced only occasionally. ETEC was the most prevalent virulotype, followed by EPEC. However, EIEC and EAEC virulotypes could not be detected in winter or the rainy season, respectively. Specific regional distribution patterns of differentE. colivirulotypes and their temporal fluctuations were identified. These observations may assist with assessing seasonal risk and identifying vulnerable areas of the country prone toE. coli-associated outbreaks.

scholarly journals Reply: Potential discharge, attenuation and exposure risk of SARS-CoV-2 in natural water bodies receiving treated wastewater

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Manish Kumar ◽  
Md Alamin ◽  
Keisuke Kuroda ◽  
Kiran Dhangar ◽  
Akihiko Hata ◽  
...  
Keyword(s):  
Natural Water ◽  
Water Bodies ◽  
Treated Wastewater ◽  
Exposure Risk ◽  
Natural Water Bodies

On methodological approaches to the improvement of surface water bodies and target indicators of the natural waters’ quality

2021 ◽  
Vol 27 (1) ◽  
pp. 6-14
Author(s):  
V. Zaslonovsky ◽  
◽  
N. Sharapov ◽  
M. Bosov ◽  
◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Natural Water ◽  
Aquatic Ecosystems ◽  
Natural Waters ◽  
Water Bodies ◽  
Surface Water Bodies ◽  
Methodological Approaches ◽  
Natural Water Bodies

The paper is devoted to the development of proposals concerning the improvement of surface water bodies and the appointment of target indicators of the natural waters’ quality. The paper considers a variety of problems of preserving, restoring and improving the quality of natural surface waters: from regional features of the formation of natural water composition, to differences in the requirements for the quality of water consumed. The object of the study is the qualitative indicators of the waters of natural water bodies, and the subject of the study is the methodological approaches to the normalization of these indicators. The purpose of the work is to identify the main shortcomings in the domestic system of rationing the quality of natural waters, and to form appropriate proposals. For this purpose, the following tasks were set and solved: to review the methodological approaches to assessing and rationing the quality of natural waters used in some foreign countries and in the Russian Federation, to identify the main causes and shortcomings; to make proposals for improving the current system of water quality rationing. The result of this work is the conclusions about the lack of impact of the strategy operating in Russia in the development of schemes of complex use and protection of water objects, standards of permissible impact on water bodies, the appointment of permissible discharge limits in terms of maintaining and improving the water quality of natural water bodies. The reasons that led to this are indicated. The necessity of taking into account, in addition to the physical and chemical composition, also hydrobiological parameters is shown. It is concluded that instead of fisheries management standards, environmental standards should serve as the basis for target indicators of water quality of natural water bodies, which determine the well-being of humans and the stable functioning of aquatic ecosystems, taking into account regional factors. Proposals were made to adjust the methodological approaches to the implementation of this strategy. According to the authors, these proposals will speed up the solution of the main objectives of the strategy – the ecological improvement of water bodies, the preservation of unique aquatic ecosystems and the environmentally safe development of territories that previously experienced relatively small anthropogenic impacts (Eastern Siberia and the Far East)

Conceptual model for minimizing the risk of water pollution in the Kemerovo region

2020 ◽  
pp. 107-118 ◽  
Author(s):  
E. Yu. Kulikova ◽  
Ju. A. Sergeeva
Keyword(s):  
Water Pollution ◽  
Conceptual Model ◽  
Water Contamination ◽  
Coal Industry ◽  
Water Bodies ◽  
Polluted Water ◽  
Mining Operations ◽  
Mine Waters ◽  
Critical Limit

One of the problems of functioning of coal industry enterprises is the formation of mine waters, which are discharged into water bodies and cause their dangerous pollution. The total volume of water pumped by the enterprise includes up to 15 % for the recycling cycle, the remaining 85% is discharged to surface water bodies. As a result, the ecological balance of coal regions is disturbed, their sanitary and hygienic state on the environment worsens, and the quality of coal is reduced due to the intake of polluted water for technological operations. The volume of mine water contamination increases during mining operations at deeper horizons and in difficult mining and hydrogeological conditions. In turn, this leads to pollution and depletion of underground aquifers and the formation of environmental risk factors. In Kuzbass, all these factors contribute to the development of water crisis, since the state of surface reservoirs has already reached a critical limit. Especially dangerous is the process of liquidation of mines. Closing mines and sections disrupt natural water flows, resulting in all water from the aquifers going to deeper horizons. More pollutants enter the water, which poison the underground hydrosphere of the regions. The paper analyzes the pollutants entering the underground and surface hydro grid at coal-fired plants and offers a Conceptual model for minimizing the risk of water pollution.

Eschatology and Religiosity of the People in Russia in the 17th Century

2021 ◽  
Vol 20 (8) ◽  
pp. 23-33
Author(s):  
Natalya S. Gurianova
Keyword(s):  
17Th Century ◽  
Church Reform ◽  
Christian Teaching ◽  
The People ◽  
The World ◽  
Spiritual Crisis ◽  
Time Of Troubles ◽  
Early Modern Era ◽  
Modern Era ◽  
The Church

The article studies the religiosity of Russian population in the 17th century in order to find out the type of this state of public mind. Special attention is drawn to the acuteness of eschatological expectations in society, which intensified during periods of crises. After the Time of Troubles (Smuta), the Church, trying to bring society out of the spiritual crisis, had been exploiting the “end of the world” topic through publishing relevant texts. This trend was especially noticeable during the time of Patriarch Joseph. The decision of the Moscow Printing House (Pechatnyi Dvor) to extend the amount of eschatological publications was determined not only by the direction of church policy, but also by the request in society, the desire of the population to get a more complete picture of the Christian teaching about the ultimate destinies of the world and man, since the spiritual crisis had presupposed an increase of apocalyptic moods. This desire indicates that the population was characterized by the religiosity of the medieval type. The article scrutinizes in particular the 2nd half of the 17th century, which modern researchers rightly designate as the early Modern era. In a society with such a keen perception of the time, the church reform, initiated in the middle of the century by Patriarch Nikon, was naturally not supported by a part of the population. In the interpretation of the defenders of the Old Belief, the actions of the reformers turned into clear signs of the advent of the kingdom of Antichrist, as it was prophesied in Christian teaching. It was not some peculiarity of the worldview of the opponents of church reform, their behavior adjusted the religiosity of the epoch. To justify these thoughts the position of Patriarch Nikon could be mentioned. Nikon found himself in a situation of disapproval and, arguing to be wrongfully convicted and misunderstood, he also used the eschatological doctrine. Based on the analysis of such facts, the article concludes that the 2nd half of the 17th century was characterized by religiosity of the medieval type.

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