scholarly journals Analytical Profiling of Heavy Metals Contamination in soils, Dismantling Dust, and Rubber Samples in Karachi City Using AAS, WD-XRF, and SEM Technique

2021 ◽  
Vol 2 (3) ◽  
pp. 242-257
Author(s):  
Abdul Rafeeq ◽  
Syed Azhar Ali ◽  
Asad Khan Tanoli ◽  
Naseem Akhter ◽  
Ghulam Raza
Keyword(s):  
Heavy Metals ◽  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Electronic Waste ◽  
Absorption Spectrometry ◽  
The United States ◽  
Particle Analysis ◽  
Local Market ◽  
Protection Agency ◽  
Allowable Limit

The concentrations of Cd, Cr, Cu, Fe, Ni, Pb, & Zn were determined in the samples of soil, dismantling dust and rubber collected from the electronic waste dumping site of Shershah market and rubber from the Local market of Karachi city Pakistan. The city e-waste dumping and dismantling sites toxicity were not conducted before using modern techniques. The subsequent data of the heavy metals concentration were obtained using Atomic Absorption Spectrometry (AAS), Scanning Electron Microscopy (SEM), and Wavelength Dispersive- X-Ray Fluorescence Spectrometry (WD-XRF). Cu, Pb, and Zn were found as 133.17, 104.53 & 113.26 in soil, whereas in dismantling dust Pb & Zn were remained 10.56 and 12.65 mg/kg similarly. The China toy particle analysis by SEM was resulting metallic trend as Fe > Zn > Pb > Cd > Ni > Cr. The estimated data were compared with the levels allowed by the Pakistan Environmental Protection Agency (Pak-EPA) and the United States Environmental Protection Agency (USEPA). The maximum allowable limit for Cd is 3; Cr, Cd, and Pb are 100 for Ni is 50 and 300 mg/kg for Zn. The presence of these heavy metals from e-waste dumping would become soon a significant reason to cause serious health problems for the nearby residents and as well as city too. It has been concluded that the dumping of e-waste is the major source of contamination of heavy metals in the studied media. It is recommended that the e-waste must be recycled formally to prevent the soil from being polluted. .

Municipal Wastewater Treatment Technology Transfer Activities of the United States Environmental Protection Agency

1989 ◽  
Vol 21 (6-7) ◽  
pp. 685-698
Author(s):  
J. J. Convery ◽  
J. F. Kreissl ◽  
A. D. Venosa ◽  
J. H. Bender ◽  
D. J. Lussier
Keyword(s):  
Technology Transfer ◽  
Environmental Protection ◽  
Case Studies ◽  
Environmental Protection Agency ◽  
The United States ◽  
Environmental Research ◽  
Outreach Program ◽  
Small Community ◽  
Protection Agency ◽  
Transfer Programs

Technology transfer is an important activity within the ll.S. Environmental Protection Agency. Specific technology transfer programs such as the activities of the Center for Environmental Research Information, the Innovative and Alternative Technology Program, as well as the Small Community Outreach Program are used to encourage the utilization of cost-effective municipal pollution control technology. Case studies of three technologies including a plant operations diagnostic/remediation methodology, alternative sewer technologies and ultraviolet disinfection are presented. These case studies are presented retrospectively in the context of a generalized concept of how technology flows from science to utilization which was developed in a study by Allen (1977). Additional insights from this study are presented on the information gathering characteristics of engineers and scientists which may be useful in designing technology transfer programs. The recognition of the need for a technology or a deficiency in current practice are important stimuli other than technology transfer for accelerating the utilization of new technology.

scholarly journals Sampling and analyses of polychlorinated dibenzo dioxins (PCDDs) and polychlorinated dibenzo furans (PCDFs) emissions in South Africa: A practitioner’s guide

2016 ◽  
Vol 24 (2) ◽  
pp. 29-32
Author(s):  
D.L. Posthumus ◽  
G.B. Woollatt
Keyword(s):  
Public Health ◽  
South Africa ◽  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Health Impact ◽  
The United States ◽  
Protection Agency ◽  
Draft Report ◽  
Limit Values ◽  
The Impact

Dioxins and furans are toxic chemicals. A draft report released for public comment in September 1994 by the US Environmental Protection Agency clearly describes dioxin as a serious public health threat. The public health impact of dioxins may rival the impact that dichlorodiphenyltrichloroethane (DDT) had on public health in the 1960’s. According to the United States Environmental Protection Agency(USEPA) report, not only does there appear to be no “safe” level of exposure to dioxin, but levels of dioxin and dioxin-like chemicals have been found in the general US population that are “at or near levels associated with adverse health effects.”  With this in mind the purpose of this paper is to provide an overview of the current dioxin and furan emissions from industry in South Africa, in terms of compliance with the relevant emission limit values (ELVs) and the current challenges faced with the monitoring and analysis thereof.

scholarly journals Radon measurements with charcoal canisters temperature and humidity considerations

2016 ◽  
Vol 31 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Milos Zivanovic ◽  
Gordana Pantelic ◽  
Jelena Krneta-Nikolic ◽  
Milica Rajacic ◽  
Dragana Todorovic
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Functional Dependence ◽  
Screening Method ◽  
Mass Gain ◽  
The United States ◽  
Calibration Data ◽  
Protection Agency ◽  
Temperature And Humidity ◽  
Radon Testing

Radon testing by using open-faced charcoal canisters is a cheap and fast screening method. Many laboratories perform the sampling and measurements according to the United States Environmental Protection Agency method - EPA 520. According to this method, no corrections for temperature are applied and corrections for humidity are based on canister mass gain. The EPA method is practiced in the Vinca Institute of Nuclear Sciences with recycled canisters. In the course of measurements, it was established that the mass gain of the recycled canisters differs from mass gain measured by Environmental Protection Agency in an active atmosphere. In order to quantify and correct these discrepancies, in the laboratory, canisters were exposed for periods of 3 and 4 days between February 2015 and December 2015. Temperature and humidity were monitored continuously and mass gain measured. No significant correlation between mass gain and temperature was found. Based on Environmental Protection Agency calibration data, functional dependence of mass gain on humidity was determined, yielding Environmental Protection Agency mass gain curves. The results of mass gain measurements of recycled canisters were plotted against these curves and a discrepancy confirmed. After correcting the independent variable in the curve equation and calculating the corrected mass gain for recycled canisters, the agreement between measured mass gain and Environmental Protection Agency mass gain curves was attained.

scholarly journals Quantification of silver in several samples using a new ionophore polymer membrane as an optical sensor

RSC Advances ◽  
2021 ◽  
Vol 11 (56) ◽  
pp. 35300-35310
Author(s):  
Hesham H. El-Feky ◽  
Abdelrazek M. Askar ◽  
Alaa S. Amin
Keyword(s):  
United States ◽  
Environmental Protection ◽  
Drug Administration ◽  
Optical Sensor ◽  
Environmental Protection Agency ◽  
Food And Drug Administration ◽  
Aquatic Organisms ◽  
The United States ◽  
Polymer Membrane ◽  
Protection Agency

Growing concerns about the possible toxicity of silver to aquatic organisms, bacteria and humans have led to newly issued regulations by the United States Environmental Protection Agency and the Food and Drug Administration regarding the use of silver.

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