PH, ELECTRICAL CONDUCTIVITY,NITROGEN,  PHOSPHORUS AND TRACE METAL LEVELS IN THE SEDIMENT SAMPLES OF AVARAGERE LAKE, DAVANGERE, KARNATAKA: A CASE STUDY

This study is focused on evaluating the trace metal levels in water and tissues of two commercial fish species Arius thalassinus and Pennahia anea that were collected from Kapar and Mersing coastal waters. The concentrations of Fe, Zn, Al, As, Cd and Pb in these coastal waters and muscle, liver and gills tissues of the fishes were quantified. The relationship among the metal concentrations and the height and weight of the two species were also examined. Generally, the iron has the highest concentrations in both water and the fish species. However, Cd in both coastal waters showed high levels exceeding the international standards. The metal level concentration in the sample fishes are in the descending order livers > gills > muscles. A positive association between the trace metal concentrations and weight and length of the sample fishes was investigated. Fortunately the level of these metal concentrations in fish has not exceeded the permitted level of Malaysian and international standards.

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Trace Metal Levels in Water, Fish, and Sediment From River Nile, Egypt: Potential Health Risks Assessment

Journal of Toxicology and Environmental Health Part A ◽

10.1080/15287394.2013.848421 ◽

2013 ◽

Vol 76 (21) ◽

pp. 1183-1187 ◽

Cited By ~ 18

Author(s):

Hesham Dahshan ◽

Amr Mohamed Mohamed Abd-Elall ◽

Ayman Mohamed Megahed

Keyword(s):

Trace Metal ◽

Health Risks ◽

River Nile ◽

Potential Health ◽

Metal Levels ◽

Water Fish ◽

Health Risks Assessment ◽

Risks Assessment

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Trace Metal Contamination Characteristics and Health Risks Assessment ofCommelina africanaL. and Psammitic Sandflats in the Niger Delta, Nigeria

Applied and Environmental Soil Science ◽

10.1155/2016/8178901 ◽

2016 ◽

Vol 2016 ◽

pp. 1-14 ◽

Cited By ~ 5

Author(s):

Nsikak U. Benson ◽

Paul A. Enyong ◽

Omowunmi H. Fred-Ahmadu

Keyword(s):

Trace Metal ◽

Niger Delta ◽

Anthropogenic Activities ◽

Hazard Quotient ◽

Risk Index ◽

Sediment Quality ◽

Hazard Index ◽

Adult Males ◽

Metal Concentrations ◽

Metal Levels

The purpose of this study was to investigate and quantify trace metal concentrations inCommelina africanaL. and psammitic sandflats from an intertidal coastal ecosystem in Niger Delta, Nigeria, and to evaluate their spatial distribution, degree of contamination, and source apportionment. The environmental risks associated with soil contamination were elaborately assessed using potential ecological risk index, sediment quality guidelines, and enrichment relative to background levels. The mean concentrations of Cd, Cr, Ni, Pb, and Zn in sandflat soil samples are0.76±9.0×10-2,7.39±8.7×10-1,2.28±0.35,0.024±4.0×10-3, and74.51±2.55 mg/kg, respectively. Metal levels indicate strong variability with sampling sites. The order of trace metal concentrations in theCommelina africanaL. samples isZn>Ni>Cr>Pb>Cd. The concentrations varied with the sample locations; and the levels of Pb (0.05 to 0.08 mg/kg) at all locations are found to be significantly below permissible level of 0.3 mg/kg. Potential sources of metal loadings may be associated with localised or diffused anthropogenic activities. The average carcinogenic risks are below1.0×10-6threshold values, and the sandflat soils are not considered to pose significant health effects to children and adult males and females. However, the carcinogenicity and noncarcinogenicity risks ranking decrease following the orderchildren>adult males>adult females. Comparatively, the hazard quotient and hazard index indicate that the psammitic sandflats might pose a health risk to children in future.

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Fly Ash Modified Coalmine Solid Wastes for Stabilization of Trace Metals in Mining Damaged Land Reclamation: A Case Study in Xuzhou Coalmine Area

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph15102317 ◽

2018 ◽

Vol 15 (10) ◽

pp. 2317 ◽

Cited By ~ 1

Author(s):

Jiu Huang ◽

Peng Wang ◽

Chaorong Xu ◽

Zhuangzhuang Zhu

Keyword(s):

Fly Ash ◽

Trace Metal ◽

Soil Layer ◽

Fly Ashes ◽

Migration Ability ◽

Metal Elements ◽

Trace Metal Elements ◽

Simulated Precipitation ◽

Backfill Materials

In China, coalmine wastes, such as gangues, are used for reclamation of mining subsided land. However, as waste rocks, gangues contain several trace metal elements, which could be released under natural weathering and hydrodynamic leaching effects and then migrate into the reclamed soil layer. However, it is very difficult to find adequate other backfill materials for substitution of gangues. In this paper, we present a novel method and case study to restrict the migration ability of trace metal elements in gangues by using another kind of coalmine solid waste—fly ashes from coal combustion. In this study, fly ashes were mixed with gangues in different mass proportions 1:0.2, 1:0.4, 1:0.6 and 1:0.8 as new designed backfill materials. Due to the help of fly ash, the occurrence states of studied trace metal elements were greatly changed, and their releasing and migration ability under hydrodynamic leaching effect were also significantly restricted. In this research seven trace metal elements in gangues Cu, Zn, Pb, Cd, Cr, Mn and Ni were studied by using soil column hydrodynamical leaching method and simulated precipitation for one year. The results show that under the driving of natural precipitation trace metal elements were generally transported deep inside the reconstructed land base, i.e., far away from soil layer and most of the trace metal elements were transformed into a bonded state, or combined in inert occurrence states, especially the residual state. With this method, the migration activities of tested trace metal elements were greatly restricted and the environmental potential risk could be significantly reduced.

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The risk of static electricity at handling diesel fuel

MATEC Web of Conferences ◽

10.1051/matecconf/202134310013 ◽

2021 ◽

Vol 343 ◽

pp. 10013

Author(s):

Mihaela Părăian ◽

Emilian Ghicioi ◽

Niculina Vătavu ◽

Dan Gabor ◽

Sorin Iuliu Mangu

Keyword(s):

Electrical Conductivity ◽

Diesel Fuel ◽

Static Electricity ◽

Fuel Type ◽

Point Temperature ◽

Flammability Characteristics ◽

Fuel Tanks ◽

Temperature And Pressure ◽

A Company

Diesel fuel in motion when is transporting by pipes when is mixing, pumping, filtering, agitating or by pouring them from one vessel to another can generate static charges. Also, static electricity may occur if the liquid is splashes and forms a mist inside the tank. Accumulation of static electricity can, under certain conditions, be discharge and ignite the flammable/explosive atmosphere. Ignition hazards from static discharges can be eliminated by controlling the generation or accumulation of static charges or by eliminating a flammable mixture where static electricity may be discharged. Factors that need to be considered to reduce the risk of ignition sunt flammability characteristics of explosive atmosphere (the vapor pressure, flash point, temperature, and pressure) and the factors that determine the charging of static electricity (fuel type, electrical conductivity, sulfur content, viscosity, vehicle process: flow rate, pipe diameter, filters, pumps, spark promoters). In this paper are presented some aspects regarding the technical, organizational requirements and responsibilities of the personnel designated to prevent the formation and accumulation of static electricity when loading diesel fuel tanks, starting from a case study, respectively some explosions which occurred to a company during the loading operation.

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