Electronic Waste Management by Biological Leaching

2019 ◽  
Vol 1 (1) ◽  
pp. 54-61
Author(s):  
Gokul V ◽  
Rajasekaran T
Keyword(s):  
Acid Medium ◽  
Manufacturing Industry ◽  
Mine Drainage ◽  
Electronic Waste ◽  
Mining Industry ◽  
Negative Consequences ◽  
Policy Makers ◽  
Acidophilic Bacteria ◽  
Sulfur Oxidizing ◽  
Mining Water

The electronic industry is the largest and fastest growing manufacturing industry in the world. Electronic waste or E-waste is one of the emerging problems in developed and developing countries. Most of these e-wastes are ending up in dumping yards and recycling centers, posing a new challenge to the environment and policy makers as well. Toxic metals in the E-waste are usually non -biodegradable and they will create harmful long lasting negative consequences on the environment in general and our health particular. Currently E-waste is treated by chemical leaching, it gives more environmental issues due to usage of inorganic chemicals in treatment process. So that, the E-waste can be used for extraction of metals by the process of biological leaching. It is the process of extraction of metal from source by using biological organism. In this process involve numerous ferrous iron and sulfur oxidizing bacteria, acidophilic bacteria which is grown in acid medium. The acid mine drainage (AMD) is the outflow of acidic water from metal mines or coal mines. AMD is recognized as one of the most serious environmental problem in the mining industry. It is also toxic and difficult to managing this water. Due to the presence of sulphide metal in the ore, which is released after the mining process, will react with atmosphere and water forms sulphuric acid which poses potential harm to the environment and eco system. This acid medium is most suitable for the development of acidophilic bacteria’s. In this project, the Acidophilic bacteria in AMD can be suggested for process of recycling in biological leaching of electronic waste. This process can be used for both bioleaching of E-waste and management of mining waste water. The process will suppress the harmfulness in both E-waste and waste mining water.

scholarly journals Sequence analysis and confirmation of type IV pili-associated proteins PilY1, PilW and PilV in Acidithiobacillus thiooxidans

2018 ◽  
Author(s):  
Elvia Alfaro-Saldaña ◽  
O. Araceli Hernández-Sánchez ◽  
Araceli Soberano-Patrón ◽  
Marizel Astello-García ◽  
J. Alfredo Méndez-Cabañas ◽  
...  
Keyword(s):  
Mine Drainage ◽  
Protein Structures ◽  
Mining Industry ◽  
Type Iv Pili ◽  
Acidithiobacillus Thiooxidans ◽  
Type Iv ◽  
Cohesive Group ◽  
Associated Proteins ◽  
Sulfur Oxidizing ◽  
First Time

AbstractAcidithiobacillus thiooxidans is an acidophilic chemolithoautotrophic bacterium widely used in the mining industry due to its metabolic sulfur-oxidizing capability. The biooxidation of sulfide minerals is enhanced through the attachment of A. thiooxidans cells to the mineral surface. The Type IV pili (TfP) of At. thiooxidans may play an important role in the bacteria attachment, since among other functions, TfP play a key adhesive role in the attachment to and colonization of different surfaces. In this work, we reported for the first time the confirmed mRNA sequences of three TfP proteins from At. thiooxidans, the protein PilY1 and the TfP pilins PilW and PilV. The nucleotide sequences of these TfP proteins show changes of some nucleotide positions with respect to the corresponding annotated sequences. The bioinformatic analyses and 3D-modeling of protein structures sustain their classification as TfP proteins, as structural homologs of the corresponding proteins of P. aeruginosa, results that sustain the role of PilY1, PilW and PilV in pili assembly. Also, that PilY1 comprises the conserved Neisseria-PilC (superfamily) domain of the tip-associated adhesin, while PilW of the superfamily of putative TfP assembly proteins and PilV belongs to the superfamily of TfP assembly protein. Also, the analyses suggested the presence of specific functional domains involved in adhesion, energy transduction and signaling functions. The phylogenetic analysis indicated that the PilY1 of Acidithiobacillus genus forms a cohesive group linked with iron- and/or sulfur-oxidizing microorganisms from acid mine drainage or mine tailings. This work enriches knowledge regarding colonization, adhesion and biooxidation of inorganic sulfurs by A. thiooxidans.

M. A. Ayuh. Made in Jamaica: The Development of Manufacturing Sector. Baltimore: The Johns Hopkins University Press. 1981. xxii+128 pp.

1986 ◽  
Vol 25 (1) ◽  
pp. 93-95
Author(s):  
Najam-us- Saqib
Keyword(s):  
Manufacturing Industry ◽  
Manufacturing Sector ◽  
Policy Makers ◽  
Industrial Base ◽  
Johns Hopkins University ◽  
Key Characteristics ◽  
The World ◽  
Caribbean Country ◽  
Bauxite Ore ◽  
Made In

Jamaica, known in the world for her rich deposits of bauxite ore, is a small Caribbean country with an area of 10991 square kilometers and a population of just over two million individuals. This beautifu11and, which was described by Columbus as "The fairest isle that eyes have beheld" has developed a remarkably diversified manufacturing sector starting from a modest industrial base. Jamaica's manufacturing industry enjoyed a respectable growth rate of about 6 percent per annum during the good old days of the euphoric '50s and '60s. However, those bright sunny days ''when to live was bliss" were followed by the chilling winter of much subdued progress. The rise and fall of growth have aroused considerable interest among economists and policy• makers. The book under review probes the causes of this behaviour by analysing key characteristics of Jamaican manufacturing sector and tracing its path of evolution.

The Impact of Economic Crisis on Tourism Industry: A Bangladesh Perspective

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Md. Ziaul Haque
Keyword(s):  
Economic Crisis ◽  
Tourism Industry ◽  
Political Crisis ◽  
Strong Impact ◽  
Negative Consequences ◽  
Policy Makers ◽  
Tourism Product ◽  
International Tourist ◽  
Sustained Recovery ◽  
The Impact

The tourism sector is experiencing numerous challenges as a result of the global economic crisis. After a significant contraction in 2009, tourism rebounded strongly  in  2010  and  in  2011  the  international  tourist  arrivals  and  receipts  are projected to increase substantially. The Tourism industry is expected to show a sustained recovery in 2012. The crisis has particularly strong impact and slightly negative consequences in Bangladesh. The country is undergoing a political crisis, as well, and it seems that the forthcoming elections may be the only solution for the restoration of stability and social peace.  In addition, tourism can be the driving force behind Bangladesh economic recovery. However, for its achievement the country’s policy makers should take several measures towards restructuring and improving the sector. These measures include: enhancement of alternative forms of tourism; environmental protection; creation of quality infrastructure; and boost of competitiveness through a tourism product that offers value for money

The Impact Of Economic Crisis On Tourism Industry: A Bangladesh Perspective

2015 ◽  
Vol 1 (1) ◽  
pp. 15
Author(s):  
Md. Ziaul Haque
Keyword(s):  
Economic Crisis ◽  
Tourism Industry ◽  
Political Crisis ◽  
Strong Impact ◽  
Negative Consequences ◽  
Policy Makers ◽  
Tourism Product ◽  
International Tourist ◽  
Sustained Recovery ◽  
The Impact

The tourism sector is experiencing numerous challenges as a result of the global economic crisis. After a significant contraction in 2009, tourism rebounded strongly  in  2010  and  in  2011  the  international  tourist  arrivals  and  receipts  are projected to increase substantially. The Tourism industry is expected to show a sustained recovery in 2012. The crisis has particularly strong impact and slightly negative consequences in Bangladesh. The country is undergoing a political crisis, as well, and it seems that the forthcoming elections may be the only solution for the restoration of stability and social peace.  In addition, tourism can be the driving force behind Bangladesh economic recovery. However, for its achievement the country’s policy makers should take several measures towards restructuring and improving the sector. These measures include: enhancement of alternative forms of tourism; environmental protection; creation of quality infrastructure; and boost of competitiveness through a tourism product that offers value for money

Gender diversity and innovation in mining – a corpus-based discourse analysis

2017 ◽  
Vol 9 (4) ◽  
pp. 359-376 ◽  
Author(s):  
Ylva Fältholm ◽  
Cathrine Norberg
Keyword(s):  
Discourse Analysis ◽  
Gender Diversity ◽  
Mining Industry ◽  
Diversity Management ◽  
Business Case ◽  
Female Representation ◽  
Policy Makers ◽  
Content Type ◽  
Gender Patterns ◽  
Practical Implications

Purpose The purpose of this study is to gain increased knowledge about gender diversity and innovation in mining by analyzing how women are discursively represented in relation to these two concepts, and in doing so establish how diversity management is received and communicated in the industry. Design/methodology/approach The study is based on analysis of texts including references to gender diversity and innovation in mining found on the web. The tool used to retrieve the data has been WebCorpLive, a tool designed for linguistic analysis of web material. Findings Although increased female representation is communicated as a key component in the diversity management discourse, based on the idea that diversity increases innovation and creativity, closer analysis of texts on diversity and innovation in mining shows that what women are expected to contribute with has little explicit connection with innovation. Research limitations/implications The study contributes with increased knowledge about diversity management by providing an example of how it is received in a traditionally male-dominated industry. Practical implications The findings indicate that for diversity management to have a real effect in mining, it needs to be based on gender equality and social justice motives, rather than on a business case rationale – the principal motive today. To enable this change, stereotypical gender patterns, as shown in this study, need to be made visible and problematized among policy makers, practitioners and actors on all levels of the industry. Originality value The study contributes with new knowledge about gender in the mining industry previously not attended to by using a method which so far has been sparsely used in discourse analysis, although pointed out as promising.

Electronic Waste and Environmental Justice

2021 ◽  
Author(s):  
David N. Pellow
Keyword(s):  
Social Movements ◽  
Environmental Justice ◽  
Digital Media ◽  
Social Inequalities ◽  
Electronic Waste ◽  
Dynamic Changes ◽  
Policy Makers ◽  
Waste Production

This chapter offers a review of the interdisciplinary literatures on electronic waste (e-waste) from an environmental justice perspective. Specifically, the author explores how e-waste reflects dynamic changes in the ways that the materiality of digital media intersects with ecological concerns and social inequalities. The author draws on several examples of e-waste production, reuse, recycling, and export around the globe as illustrations of these tensions. The author also discusses the ways that grassroots social movements and policy makers have responded to this crisis. Finally, the chapter considers a number of debates about the changing character of environmental justice struggles in the e-waste industry and workplaces.

scholarly journals Metal Removal from Acid Waters by an Endemic Microalga from the Atacama Desert for Water Recovery

Minerals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 378 ◽  
Author(s):  
Marcela Martínez ◽  
Yanett Leyton ◽  
Luis Cisternas ◽  
Carlos Riquelme
Keyword(s):  
Mine Drainage ◽  
Metal Removal ◽  
Atacama Desert ◽  
Mining Industry ◽  
Mining Activity ◽  
Water Recovery ◽  
Metallic Ions ◽  
Mineral Extraction ◽  
High Concentrations ◽  
Acid Waters

The environmental problems generated by waste from the mining industry in the mineral extraction for business purposes are known worldwide. The aim of this work is to evaluate the microalga Muriellopsis sp. as a potential remover of metallic ions such as copper (Cu2+), zinc (Zn2+) and iron (Fe2+), pollutants of acid mine drainage (AMD) type waters. For this, the removal of these ions was verified in artificial acid waters with high concentrations of the ions under examination. Furthermore, the removal was evaluated in waters obtained from areas contaminated by mining waste. The results showed that Muriellopsis sp. removed metals in waters with high concentrations after 4–12 h and showed tolerance to pH between 3 and 5. These results allow proposing this species as a potential bioremediator for areas contaminated by mining activity. In this work, some potential alternatives for application in damaged areas are proposed as a decontamination plan and future prevention.

scholarly journals The Best Available Techniques for Disturbed Lands Reclamation in Kuzbass

2018 ◽  
Vol 41 ◽  
pp. 02006 ◽  
Author(s):  
Yury Manakov ◽  
Andrey Kupriyanov
Keyword(s):  
Mining Industry ◽  
State Standards ◽  
Sea Buckthorn ◽  
Coal Production ◽  
Negative Consequences ◽  
Natural Ecosystems ◽  
Traditional Methods ◽  
Best Available Technologies ◽  
Best Available Techniques ◽  
Economic Use

Remediation of disturbed lands is a stage of elimination of negative consequences of coal production. In Kuzbass traditional methods to create the plantations of pine and sea buckthorn for economic use. Now dumps are objects for restoration of natural ecosystems and biodiversity. During the UNDP-GEF project in Kuzbass, the best available technologies for the restoration of disturbed lands were developed. They have been included in the new state standards and are subject to mandatory application in the mining industry in Russia.

scholarly journals Students' Beliefs about Willingness to Access Complementary and Alternative Therapies (CAT) Training for Future Integration into Psychology Practice

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Lee-Ann M. Wilson ◽  
Kyra Hamilton ◽  
Katherine M. White
Keyword(s):  
Holistic Approach ◽  
Psychology Students ◽  
Alternative Therapies ◽  
Negative Consequences ◽  
Policy Makers ◽  
Psychological Practice ◽  
Complementary And Alternative Therapies ◽  
Important Others ◽  
Future Practice ◽  
Complementary And Alternative

It is suggested that all psychologists gain basic training in the types of complementary and alternative therapies (CAT) their clients may be using. As psychology students are the next cohort of health professionals who will inform future initiatives in the field, it is important to understand the factors which influence their decisions about CAT integration. Drawing on the theory of planned behavior, we investigated the beliefs that differentiate between psychology students who are high or low on willingness to access training in CAT for future practice use. Undergraduate psychology students () completed a questionnaire assessing the likelihood of positive and negative consequences of accessing training and utilizing CAT within a psychological practice, important others’ approval, and barriers preventing them from this integration behavior. Those students higher on willingness were more likely to endorse positive outcomes (e.g., offering a more holistic approach to therapy) of accessing CAT training for future practice use and to believe that important others (e.g., clients) would support this behavior. A regression analysis examining the relative importance of these belief sets broadly supported the belief-based analyses. These beliefs of student psychologists can inform educators and policy makers about CAT training and integration in psychology practice.

Intercorporate default contagion from industry failures: Stress testing on creditee linkage networks of China

2014 ◽  
Vol 01 (02) ◽  
pp. 1450019 ◽  
Author(s):  
Mingmin Yang ◽  
Haoyu Gao ◽  
Zhigang Cao ◽  
Xiaoguang Yang
Keyword(s):  
Manufacturing Industry ◽  
Mining Industry ◽  
Logistic Function ◽  
Financial Contagion ◽  
Underlying Network ◽  
Initial Shock ◽  
Bad Loans ◽  
Default Contagion ◽  
Regulatory Commission ◽  
Two Parameter

This paper explores a simulation framework to examine the financial contagion on the creditee linkage networks, owing to a comprehensive loan-level database of China Banking Regulatory Commission (CBRC). We merge two kinds of connections together, i.e., loan guarantee and shareholding relationships, when constructing our underlying network. Default transmission probabilities are characterized by the two-parameter logistic function with a variant of leverage. Our main finding is that, under the above channel, contagion spreads in a linear form. To be precise, as the scale of the initial shock grows, the total number of default firms and the amount of bad loans incurred both increase linearly. The main reason for this is that the underlying network is rather sparse. Within the same ratio of initially default companies, the Manufacturing Industry is likely to cause the largest number of companies to fail and the largest amount of bad loans. We also find that the default contagion mostly spreads within the same industries, explaining again why the domino effect is very limited. We investigate the impacts on different regions from industry failures, and get many interesting findings, e.g., most industries may influence the Yangtze Delta Economic Circle significantly except for Agriculture and the Mining Industry.

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