Substantiation оf Parameters оf Biosorption Extraction оf Indium from Electronic Waste

2021 ◽  
Vol 25 (9) ◽  
pp. 24-29
Author(s):  
A.A. Chugainova ◽  
L.V. Rudakova
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Electronic Waste ◽  
Experimental Studies ◽  
Component Composition ◽  
Waste Generation ◽  
Limited Distribution ◽  
Research Results ◽  
Laboratory Conditions ◽  
Modern Methods

The data on the dynamics of e-waste generation in different countries are presented and modern methods of handling this type of waste are analyzed. The characteristics of the component composition of electronic waste are given. The problem of neutralization and disposal of mobile phone screens has been studied. An analysis of possible methods for extracting metals from electronic waste has been carried out, which has shown the promise of a biotechnological method based on the ability of the biomass of microscopic algae to selectively, under certain conditions, sorbs metals. Based on the analysis of the research results of domestic and foreign scientists presented in the literature the process of extracting indium from the screens of mobile phones using microscopic algae was simulated under laboratory conditions. When justifying the choice of indium as an extractable metal, two criteria were used: limited distribution in the earth's crust and the difficulty of obtaining from natural ores, as well as demand in various industries. In experimental studies, the parameters of the effective extraction of indium by the biosorption method have been determined.

scholarly journals Electronic Waste Generation Prediction in Bandung City, Indonesia

2021 ◽  
Vol 25 (1) ◽  
pp. 111-120
Author(s):  
I Made Wahyu Widyarsana ◽  
Dewi Suryanindah Supramono ◽  
Nabil Fadel
Keyword(s):  
Developing Countries ◽  
End Of Life ◽  
Mobile Phones ◽  
Electronic Waste ◽  
Economic Value ◽  
Toxic Waste ◽  
Delay Model ◽  
Waste Generation ◽  
Electronic Products ◽  
Survey Results

Abstract Nowadays waste electrical and electronic equipment (WEEE) generation is increasing due to the increase in the number of users and the development of electronic products. In Indonesia, there are no specific regulations about WEEE even though it is identified as hazardous and toxic waste. This study aims to predict the WEEE generation from the most used and replaced electronic products by citizens of Bandung City. The data is collected by surveying 400 families in Bandung City. Based on the survey results, there are three types of electronic products that are most used and replaced by citizens of Bandung City, which are mobile phones, laptops and televisions. The Delay Model is modified by replacing the lifespan variable with end-of-life to project the mobile phones, laptops and televisions waste generation in Bandung City. The purpose of this modification is to adjust the pattern of electronic products used in developing countries. The projection results state that Bandung City will generate 0.61 tons/day of mobile phones, 8.66 tons/day of laptops and 3.16 tons/day of televisions at the end of 2020. Based on the results of the projection, WEEE management and recycling is important which can reduce WEEE disposal and increase the economic value of WEEE.

scholarly journals Factors Affecting Mobile Waste Recycling through RSCM: A Literature Review

Recycling ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 30
Author(s):  
Taher Ben Yahya ◽  
Noriza Mohd Jamal ◽  
Balan Sundarakani ◽  
Siti Zaleha Omain
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Cell Phone ◽  
Management Practices ◽  
Electronic Waste ◽  
Waste Recycling ◽  
Reverse Supply Chain ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Waste Management Practices

Mobile phone consumers have been motivated by the rapid growth of technology and encouraged to update their devices regularly to keep up with new innovations, architectures, and capabilities. Consequently, mobile/cell phone waste has risen significantly in the last decade. Due to their small size, it is convenient for users to keep outdated or unused mobile phones at home or the office, rather than recycling them appropriately. A reverse supply chain (RSC) is one possible method of mitigating the questionable e-waste activity present in the ecosystem. RSC has been significant for the mobile phone industry, user states, analysts, and scholars. This paper reviews the available literature in the RSC management (RSCM) domain, along with its processes and strategies. The paper reviews 223 published scholarly papers in the domain of mobile phone waste recycling and investigates 22 papers related to factors influencing consumers’ intention with regard to electronic recycling, focusing on mobile devices, which contribute significantly to electronic waste management practices.

scholarly journals Process Planning Review for Mobile Phone Remanufacturing in Indonesia

2019 ◽  
Vol 130 ◽  
pp. 01039
Author(s):  
Yopi Yusuf Tanoto ◽  
Shu-San Gan ◽  
Didik Wahjudi ◽  
Niko Adrisenna Pontjonoto ◽  
Michael Suryajaya
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Process Planning ◽  
Visual Inspection ◽  
Electronic Waste ◽  
Manufacturing Plant ◽  
Qualitative Survey ◽  
Machine Interface ◽  
Recovery Management ◽  
Final Inspection

The increased number of mobile phone users has an impact on increasing electronic waste (E-Waste) without being offset by the act of product recovery management. Remanufacturing is one way to overcome this. Remanufacturing is a process to return used products to general aesthetics and operating standards.This paper aims to design a mobile phone remanufacturing process in Indonesia. Indonesia is a developing country where mobile usage is quite high. The mobile phones are chosen because it is one of the biggest e-waste takers of late. Several factories were visited in this study. This research uses a qualitative survey, which is carried out in mobile phone factories and service centers. From this research, a design has been made to remanufacture the process on mobile phones. The manufacturing plant verifies the design to obtain the input of the real constraints which will happen when the remanufacturing process is done. The steps in the process of remanufacturing are human machine interface & visual inspection, separation, disassembly, cleaning, inspection, sorting, reconditioning, reassembly, and final inspection.

Correlating Personality and Actual Phone Usage

2014 ◽  
Vol 35 (3) ◽  
pp. 158-165 ◽  
Author(s):  
Christian Montag ◽  
Konrad Błaszkiewicz ◽  
Bernd Lachmann ◽  
Ionut Andone ◽  
Rayna Sariyska ◽  
...  
Keyword(s):  
Big Data ◽  
Social Network ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Self Report ◽  
Psychological Variables ◽  
New Approach ◽  
Report Data ◽  
Self Report Data ◽  
Voice Calls

In the present study we link self-report-data on personality to behavior recorded on the mobile phone. This new approach from Psychoinformatics collects data from humans in everyday life. It demonstrates the fruitful collaboration between psychology and computer science, combining Big Data with psychological variables. Given the large number of variables, which can be tracked on a smartphone, the present study focuses on the traditional features of mobile phones – namely incoming and outgoing calls and SMS. We observed N = 49 participants with respect to the telephone/SMS usage via our custom developed mobile phone app for 5 weeks. Extraversion was positively associated with nearly all related telephone call variables. In particular, Extraverts directly reach out to their social network via voice calls.

The Effect of Prestige Sensitivity on Price Acceptance in Vietnam’s Mobile Phone Market

2018 ◽  
pp. 97-112
Author(s):  
Huyen Thi Nguyen ◽  
Ngoc Minh Nguyen
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Structural Equation ◽  
Sampling Method ◽  
Product Knowledge ◽  
Mediating Role ◽  
Modelling Method ◽  
Equation Modelling ◽  
Convenience Sampling

The purpose of this study is to examine the effect of prestige sensitivity on mobile phone customer’s price acceptance in Vietnam and the mediating role of product knowledge and price mavenism on this relationship. We used the convenience sampling method for data collection via questionnaires with a sample of 605 consumers who purchased mobile phones. The collected data was analysed by applying a structural equation modelling method. The result indicates that prestige sensitivity has both direct and indirect effects on price acceptance via product knowledge and price mavenism. The findings suggest that prestige sensitivity can be used as a market segmentation criterion for mobile phones when making price decisions and providing customers with adequate information could improve price acceptance.

Women, Empowerment, and Mobile Phones in the Developing World

2020 ◽  
pp. 528-544
Author(s):  
Laura Stark
Keyword(s):  
Developing Countries ◽  
Mobile Phone ◽  
Social Status ◽  
Mobile Phones ◽  
Mobile Communication ◽  
Recent Literature ◽  
Mobile Telephony ◽  
Women Empowerment ◽  
Gender And Development ◽  
And Control

This chapter surveys and analyzes recent literature on mobile communication to examine its relationship to gender and development, more specifically how women in developing countries use and are impacted by mobile phones. Focusing on issues of power, agency, and social status, the chapter reviews how mobile telephony has been found to be implicated in patriarchal bargaining in different societies, how privacy and control are enabled through it, what benefits have been shown to accrue to women using mobile phones, and what barriers, limitations, and disadvantages of mobile use exist for women and why. The conclusion urges more gender-disaggregated analysis of mobile phone impact and use and offers policy and design recommendations based on the overview and discussion.

scholarly journals Misuse and addiction to mobile phone in a sample of first-grade secondary school students of Palermo

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
S Pizzo ◽  
C Costantino ◽  
D Giliberti ◽  
I Calò ◽  
C Vella ◽  
...  
Keyword(s):  
Secondary School ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Representative Sample ◽  
Secondary School Students ◽  
First Grade ◽  
Educational Interventions ◽  
School Students ◽  
Developed Country ◽  
Teenagers And Young Adults

Abstract Background Nowadays, smartphone overuse affects massively teenagers and young adults. From 2014 to 2018 in Italy, for the 11-17 years age group, there has been an increase from 79.9% to 85.8% of daily mobile phone users. This project aims to investigate usage prevalence and misuse/addiction of mobile phones in a representative sample of first-grade secondary school students of the Province of Palermo, Italy, carrying out educational interventions to promote a proper and conscious use of smartphone. Materials and Methods An anonymous, standardized and previously validated pre-intervention questionnaire consisting of 39 items on general socio-demographic characteristics, attitudes and habits regarding smartphone usage, was administered online to 10-15 years old students of the Palermo's Province. Moreover, two additional sets of 11 and 15 items contributed to calculate a Misuse and an Addiction Score, respectively. After administration, educational interventions aimed at promoting the correct and conscious use of the smartphone, were carried out. Results A total of 1600 students belonging to 16 schools, responded to the questionnaire. 93% of the sample had a personal smartphone and 84% had a personal profile on at least one social network. About 15% of the sample experienced cyber bullying episodes and 30% accessed to adult content online (38% of parents didn't set parental control on the devices). Overall, 78.3% of the sample showed a moderate to severe misuse and 38.3% a moderate to severe addiction to mobile phones. Conclusions The uncontrolled and unconscious use of smartphones among adolescents exposes to different health risks including psycho-social and cognitive-relational problems. Results obtained demonstrate high levels of misuse and addiction to mobile devices in a representative sample of students in a developed Country, suggesting the need to implement educational interventions and the development of guidelines to encourage a responsible use of smartphones. Key messages The present study highlights an uncontrolled and unconscious use of mobile phones among 11-15 years old aged students in Southern Italy. The implementation of educational intervention at school and the development of guidelines regulating smartphone usage among adolescents, should represent a future global health priority.

scholarly journals Research on the Use of Mobile Devices and Headphones on Pedestrian Crossings—Pilot Case Study from Slovakia

Safety ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 17
Author(s):  
Miroslava Mikusova ◽  
Joanna Wachnicka ◽  
Joanna Zukowska
Keyword(s):  
Mobile Phone ◽  
Mobile Devices ◽  
Mobile Phones ◽  
Slovak Republic ◽  
Pedestrian Behavior ◽  
The Road ◽  
Phone Calls ◽  
Lack Of Information ◽  
Interaction Factor ◽  
Future Work

The topic of the use of mobile devices and headphones on pedestrian crossings is much less explored in comparison to the use of the mobile phone while driving. Recent years have seen many discussions on this issue, especially in foreign countries. The Slovak Republic, however, has not been giving it enough attention (and it is not mentioned in the National Road Safety Plan for the Slovak Republic from 2011 to 2020). This paper aims to draw attention to this issue. It presents basic outputs of a pilot study on pedestrian safety, with a focus on the use of mobile devices and headphones at selected non-signalized pedestrian crossings in three Slovak cities. Overall, 9% of pedestrians used headphones or mobile devices at observed pedestrian crossings (4% of them used headphones, 1% used headphones and at same time used their mobile phone, 2% made phone calls and 2% used their mobile phones). While these numbers can be considered relatively low, the study proved that during weekdays every 2 min someone was using the crossing without fully focusing on crossing the road safely. Another main finding was that although the safety risk at pedestrian crossings is increased by factors such as rush hour traffic or reduced visibility, pedestrian behavior related to the use of mobile phones and headphones does not change. A safety assessment was also carried out at the crossings. The results show that pedestrian behavior is not affected by the level of safety of the crossing (e.g., visibility of the crossing for drivers). The results of the presented analysis suggest that action is needed to change that. Due to the lack of information about accidents involving pedestrians using mobile phones and headsets when crossing the road, no relevant statistical data could be analyzed. The dataset collected can be used as a basis for further investigation or comparisons with other countries of the relevant indicators. In future work, we would like to include a pedestrian–driver interaction factor focusing on driver speed behavior in relation to pedestrians (who are on or are about to step onto a pedestrian crossing) and identify critical situations caused by improper behavior of drivers and/or pedestrians. This will help to understand speed adjustment problems related to pedestrian crossings.

Treated Textile Electrostatic Properties Study

2020 ◽  
Vol 992 ◽  
pp. 439-444
Author(s):  
I.V. Cherunova ◽  
S.S. Tashpulatov ◽  
S.V. Kurenova
Keyword(s):  
Experimental Studies ◽  
Material Structure ◽  
Ministry Of Education ◽  
Research Results ◽  
Textile Materials ◽  
Electrostatic Properties ◽  
Film Forming ◽  
Study Results ◽  
Water Proofing ◽  
Textile Fabric

In the article research results are presented, which aim to provide treated textile electrostatic properties study. In the article research results are presented, which aim to provide find out abilities of an anti-electrostatic treatment and binding agents for it in treatment of special textile materials and their dependance from modes of operating textile washing. Results of determine a composition and abilities of a functional impregnation; develop a method to study values of electrostatic field for tribocharging conditions of textile materialsare; experimental studies of electrostatic values of materials with functional treatment depending on operating washing modes also presented here. Study results allowed to establish efficiency of the proposed combination of anti-electrostatic active composition based on 5 % solution of dialkyldimethylammonium chloride with a binding agent with the effect to preserve the treatment in the material structure and content of which is 4 % in application of textile fabric with widely used fiber content (cotton 53 %, polyester + oil and water-proofing finish). Acrylic dispersion is stable film-forming component suitable in preserving anti-electrostatic treatment on the surface of a textile material. The research was made in Don State Technical University within the framework of State Assignment of the Ministry of education and science of Russia under the project 11.9194.2017/BCh.

scholarly journals Mobile Phone Use and Mental Health. A Review of the Research That Takes a Psychological Perspective on Exposure

2018 ◽  
Vol 15 (12) ◽  
pp. 2692 ◽  
Author(s):  
Sara Thomée
Keyword(s):  
Mental Health ◽  
Health Outcomes ◽  
Mobile Phone ◽  
Sleep Problems ◽  
Longitudinal Design ◽  
Experimental Studies ◽  
Mental Health Outcomes ◽  
Mobile Phone Use ◽  
Main Research ◽  
Behavioral Perspective

The purpose of this study was to carry out a review of observational studies that consider links between mobile phone use and mental health from a psychological or behavioral perspective. Systematic literature searches in PubMed and PsycINFO for articles published until 2017 were done. Exclusion criteria included: papers that considered radiofrequency fields, attention, safety, relational consequences, sexual behavior, cyberbullying, and reviews, qualitative, and case or experimental studies. A total of 4738 papers were screened by title and abstract, 404 were retrieved in full text, and 290 were included. Only 5% had any longitudinal design. Self-reporting was the dominating method of measurement. One third of the studies included children or youth. A majority of adult populations consisted of university students and/or self-selected participants. The main research results included associations between frequent mobile phone use and mental health outcomes, such as depressive symptoms and sleep problems. Mobile phone use at bedtime was associated with, e.g., shorter sleep duration and lower sleep quality. “Problematic use” (dependency) was associated with several negative outcomes. In conclusion, associations between mobile phone use and adverse mental health outcomes are found in studies that take a psychological or behavioral perspective on the exposure. However, more studies of high quality are needed in order to draw valid conclusions about the mechanisms and causal directions of associations.

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