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Abstract

Details

Heavy Metal Youth Identities: Researching the Musical Empowerment of Youth Transitions and Psychosocial Wellbeing
Type: Book
ISBN: 978-1-78756-849-5

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Article
Publication date: 23 March 2020

Guochao Zheng, Fuli Wang, Baiping Yan and Runting Cheng

The purpose of this study is to suppress the temperature rise of high voltage wall bushing metal plate.

Abstract

Purpose

The purpose of this study is to suppress the temperature rise of high voltage wall bushing metal plate.

Design/methodology/approach

First, the authors built a model of a traditional metal plate and got the magnetic field intensity distribution by FEA tools. Optimized according to the magnetic field intensity distribution, the authors slot the traditional metal plate and embed permanent magnets in the slot. Finally, the authors got the temperature distribution diagrams of the above three cases at different current levels by FEA tools.

Findings

Slotted metal plate is beneficial to suppress magnetic induction intensity, but the improvement of the magnetic induction intensity uniformity is not obvious. The method of embedding a permanent magnet in a slotted metal plate can optimize the magnitude and uniformity of the magnetic induction intensity in the metal plate. The larger the current passing through the metal plate, the better the temperature suppression effect of the slotted metal plate and the slotted metal plate embedded in the permanent magnet.

Originality/value

The effect of structural factors, slotting plate and setting permanent magnets on slots on the temperature of supporting plate is studied. The paper proposes two methods, slotting metal panels and embedding permanent magnet metal panels, to solve the problems of eddy current loss and high calorific value of the panel, which is of great significance to the safety of the grid equipment.

Details

Circuit World, vol. 46 no. 4
Type: Research Article
ISSN: 0305-6120

Keywords

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Article
Publication date: 26 February 2021

Hüccet Vural, Ayşenur Akbana and Alperen Meral

One of the problems that urbanization creates on the ecosystem is the increase of heavy metal accumulation of the urban lands. Due to constant urbanization and…

Abstract

Purpose

One of the problems that urbanization creates on the ecosystem is the increase of heavy metal accumulation of the urban lands. Due to constant urbanization and industrialization in many parts of the world, metals are constantly spreading to the environment and pose a great threat to human health. The purpose of the study is to determine the effect of heavy metal accumulation values of the lands located in Bingöl city center on the urban ecosystem by examining them in terms of zonal and land-use classification.

Design/methodology/approach

The research was conducted on 30 samples taken from five zones and six land-use classes (traffic area-TA, school area-SA, commercial-industry area-CA, green space-GS, residential area-RA and open space-OS). Heavy metal deposits of soil samples were determined in accredited laboratories using the Inductively Coupled Plasma – Mass Spectrometer (ICP-MS) and Atomic Absorption Spectrometer (AAS) device. The study employed the SPSS program for statistical analysis of laboratory results, and ArcGIS Pro programs were used to determine spatial pollution distribution.

Findings

Although the heavy metal contents of soil samples pose no problems in terms of national and international standards, a number of zones carry risks for the future. In the analyzes, traffic and settlement area soils in terms of land-use classifications and Zone 5 soils in terms of zonal distribution were determined as ecologically risky areas.

Originality/value

The study provided suggestions on what should be done to use the results of the research in planning the physical development of the city.

Details

Management of Environmental Quality: An International Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1477-7835

Keywords

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Article
Publication date: 1 February 2005

S.A. Mashi, S.A. Yaro and P.N. Eyong

Contamination of the environment by heavy metals is a phenomenon of global importance today. When present in high concentrations in the environment, heavy metals may enter…

Abstract

Purpose

Contamination of the environment by heavy metals is a phenomenon of global importance today. When present in high concentrations in the environment, heavy metals may enter the food chain from soils and result in health hazards. Accumulation in street dust is one major way through which heavy metals may find their way into soils and subsequently living tissues of plants, animals and human beings. In this paper, the magnitude and sources of some heavy metals (Cu, Mn, Fe, Cd, Pb and Zn) in street dust samples in and around Gwagwalada, Nigeria, were assessed.

Design/methodology/approach

Street dust samples were collected from 12 sites with and without varying levels of human activities (blacksmithing, motor repair works, metal working and fabrication, vehicular traffic and residential development) in the area and analysed by atomic absorption spectrophotometry to determine the magnitude and sources of accumulation of the above heavy metals in street dust in the study area.

Findings

The mean concentrations were found to be 210, 79, 97, 3.9, 120 and 96 μg g−1 respectively, for Pb, Zn, Cu, Cd, Fe and Mn across the various sampling sites. Samples collected from sites with human activities were found to contain concentrations of the metals that are generally higher than those in background areas (without human activities). However, metal working and fabrication, and motor repair works were found to have a stronger influence on the accumulation of the metals in the dust samples than vehicular traffic.

Practical implications

The results indicate that, contrary to what is expected, based on the observations made in several areas by many researchers elsewhere, metal working and fabrication, and motor repair works have a stronger influence on the accumulation of the metals in the dust samples than vehicular traffic in the study area.

Originality/value

Provides information on heavy metal contamination of the environment in an area of Nigeria.

Details

Management of Environmental Quality: An International Journal, vol. 16 no. 1
Type: Research Article
ISSN: 1477-7835

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Article
Publication date: 1 June 1994

Hussein I. Abdel‐Shafy, Werner Hegemann and Andrea Teiner

Describes a study carried out to evaluate the accumulation of heavymetals by two different vascular aquatic plants in the artificialwetlands which were constructed for the…

Abstract

Describes a study carried out to evaluate the accumulation of heavy metals by two different vascular aquatic plants in the artificial wetlands which were constructed for the treatment of municipal wastewater in Berlin, Germany. The studied plants were Pharagmites australis and Schoenoplectus lacustris. The investigated metals were: Zn, Cr, Cu, Fe, Cd, Ni and Pb. The translocation of such metals in the plant roots, stems and leaves was also determined. The level of metals in the influent and effluent of the wastewater, as well as the sludge, was investigated. The concentration factor of each metal by plants and sludge was further studied. Results revealed that P. australis has a higher tendency for the accumulation of metals than S. Lacustris. The level of metals was higher in roots, followed by leaves, then stems. Metals were more concentrated in the sludge than in the plants. Further study showed that the levels of metals in plants grown in the artificial wetlands were higher than in those grown in a “controlled” area. Concludes that vascular plants can act as scavengers of metals from the municipal wastewater while still maintaining a healthy status.

Details

Environmental Management and Health, vol. 5 no. 2
Type: Research Article
ISSN: 0956-6163

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Article
Publication date: 1 December 2005

N.M. Abd El‐Moniem, M.R. El‐Sourougy and D.A.F. Shaaban

Preparation of chelating resin to be used in the removal of heavy metal ions from solutions.

Abstract

Purpose

Preparation of chelating resin to be used in the removal of heavy metal ions from solutions.

Design/methodology/approach

Chelating resin based on poly (glycidyl‐methacrylate‐co‐N, N‐methylene‐bis‐acrylamide) containing ethylenediamine was synthesised and used in removal of heavy metals from solutions.

Findings

The optimal pH values for adsorption of different metal ions occur in the range 4.0‐10.0 depending on the metal ion used. The adsorption of metal ions increases with increasing treatment duration to reach to the equilibrium state. Also, the adsorption of metal ions depends on the degree of cross linking of the chelating resin, and a higher degree of cross linking results in a lower degree of metal ion adsorption. The chelating resin was highly effective for the collection of metal ions by batch and column methods. The metal ions adsorbed could be eluted with 2M HNO3 except Co2+ and the resin could be reused.

Research limitations/implications

The different factors affecting the metal ions (Cu2+, Co2+, Cd2+, Zn2+, Pb2+ and Hg2+) loading in resin such as pH, contact time and cross linking density were studied.

Practical implications

The practical applicability of the chelating resin for final stage of waste water treatment is recommended for use as a polishing agent.

Originality/value

The resins prepared were used successfully in removing heavy metals from water.

Details

Pigment & Resin Technology, vol. 34 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

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Article
Publication date: 1 February 1980

William Sharpe

Introduction Clad metals are composites of two or more metals which are joined in a continuous manner by a metallurgical bond. The composite provides the specific…

Abstract

Introduction Clad metals are composites of two or more metals which are joined in a continuous manner by a metallurgical bond. The composite provides the specific advantages of both metals, usually the good corrosion resistance of the cladding metal and the strength and economy of the backing metal.

Details

Anti-Corrosion Methods and Materials, vol. 27 no. 2
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 28 October 2014

Rihan Omar Rihan

This paper aims to report an experimental investigation of the galvanic corrosion that occurs between the base metal and the welds in X52 carbon steel petroleum pipelines…

Abstract

Purpose

This paper aims to report an experimental investigation of the galvanic corrosion that occurs between the base metal and the welds in X52 carbon steel petroleum pipelines when exposed in carbon dioxide (CO2)-containing saltwater at pH 4 at room temperature. The pipeline was fabricated by electric resistance welding (ERW).

Design/methodology/approach

The experimental setup was a closed glass cell equipped with a silver/silver chloride (Ag/AgCl) reference electrode, two working electrodes (the weld metal and the parent steel specimens) and a gas bubbler. The corrosion potential and polarization resistance of the base metal and the weld were determined using electrochemical testing methods: potentiodynamic polarization scans and linear polarization resistance measurement. The galvanic currents of the base metal when coupled to the weld metal were measured using zero resistance ammetry.

Findings

The weld metal was the anode of the couple for a very short time at the beginning of the experiment and then became the cathode until the end of the experiment. This indicates that electric resistance welded X52 steel pipe is a promising material to be operated in CO2-containing saltwater at pH 4 and 25°C because the weld area is cathodic to the parent metal, the value of the galvanic current is very low (in the order of nanoamps) and the area of the anode (i.e. the parent metal) is significantly larger than that of the cathode (weld metal).

Research limitations/implications

Further experimental research could be performed to investigate the galvanic corrosion behavior between the parent metal and the weld area of X52 carbon steel petroleum pipelines in CO2-containing saltwater at different pH values, temperature and velocity.

Practical implications

Electric resistance welded X52 steel pipe is a promising material for use with CO2-containing saltwater environments at pH 4 and 25°C.

Originality/value

The new information presented in the paper is the galvanic corrosion behavior between the parent metal and the ERW weld metal of X52 carbon steel in CO2-containing solutions. The paper should be useful to researchers working in the field of oil industry corrosion.

Details

Anti-Corrosion Methods and Materials, vol. 61 no. 6
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 1 January 1972

Every metal has a range of environmental conditions against which it is resistant or sufficiently resistant as to make the metal economically feasible. Unfortunately it is…

Abstract

Every metal has a range of environmental conditions against which it is resistant or sufficiently resistant as to make the metal economically feasible. Unfortunately it is almost a rule of thumb that the more expensive the metal the smaller the range. In most cases the resistance of the metal is a function of the metal thickness, but the function is such that relatively thin metals can produce very long lives.

Details

Anti-Corrosion Methods and Materials, vol. 19 no. 1
Type: Research Article
ISSN: 0003-5599

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Book part
Publication date: 11 May 2020

Karl Spracklen

Abstract

Details

Metal Music and the Re-imagining of Masculinity, Place, Race and Nation
Type: Book
ISBN: 978-1-83867-444-1

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