The lower Neosho River watershed has been negatively affected by intensive Pb and Zn mining that took place from the late 1800's through the mid-1900's. The nearby region is recognized with several of the U.S....
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ISBN:
(纸本)9781622769339
The lower Neosho River watershed has been negatively affected by intensive Pb and Zn mining that took place from the late 1800's through the mid-1900's. The nearby region is recognized with several of the U.S. environmental Protection Agency's Superfund Sites. The Tar Creek Superfund Site in Oklahoma is contaminated with ecotoxic metals such as lead, zinc, cadmium, and iron. In addition, millions of tonnes of mine tailings have been left on the surface near the neighboring towns of Picher and Cardin. Tar Creek is the main drainage through the Oklahoma portion of the mining area and a major source of contamination leading into the Neosho River and subsequently Grand Lake O' the Cherokees. Completion of the Pensacola Dam forming Grand Lake is a cause of backwater flooding in the Neosho River basin, which could lead to sediment and dissolved metals transport into the surrounding riparian areas. Due to the increased frequency of upstream flood events since construction of Grand Lake, a floodplain area on the Neosho River upstream of Tar and Elm Creeks was investigated for possible transport of mining-related metals using sediment core sampling and analysis techniques. Metals analysis showed total metals concentrations to have strong correlations with elevation in the floodplain area. Other relationships regarding metals concentrations and distance from the riverine area and particle size were inconclusive. Further study should be employed to characterize the quantities of metals on the remaining downstream stretch of the Neosho River.
Eco-Efficiency emerged in the 1990s as a measure of "the efficiency that ecological sources use to meet human needs." As a tool in economic and environmental integration, Eco-efficiency needs to be promoted ...
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Electro-Fenton is part of electrochemical advanced oxidation processes (EAOPs) which have been widely used to treat various types of waste such as color, drugs, phenol compounds, leachate, surfactants, and others. Thi...
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In terms of global water scarcity, the water footprint is an indicator of the use of water resources that given knowledge about the environmental impact of consuming a product. The sustainable use of water resources n...
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Plastic is one of the most serious environmental threats. Plastic is a non-biodegradable substance that releases various hazardous compounds that cause cancer and other serious illnesses, as well as endangering aquati...
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Cassava starch industry is one of the leading small-medium enterprises (SMEs) in Pati Regency. Cassava starch industry released waste that reduces the quantity of final product and potentially contamined the environme...
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In this work, we have studied the electrochemical behavior of non-porous and porous graphene/polyimide composite films fabricated by the thermal degradation of grafted flexible acrylic acid on polyamic acid backbone. ...
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ISBN:
(纸本)9780985011277
In this work, we have studied the electrochemical behavior of non-porous and porous graphene/polyimide composite films fabricated by the thermal degradation of grafted flexible acrylic acid on polyamic acid backbone. It is observed that pore size distribution has a significant effect on specific capacitance and bulk resistance of the composite material. BET and Electrochemical impedance spectroscopy (EIS) data reveal a complex pore distribution for the materials. As the porosity of the composite material increased, its bulk resistance decreased by up to 400% and the specific capacitance increased by up to 200%. Ionic diffusion resistance associated with the pore structure for the porous composite decreased due to easy access of electrolyte ions through the pore length of the material. Specific capacitance of up to 34,240mF/g was obtained for the composite system at a scan rate of 50mV/s which remained fairly stable through the 50 cycle runs. Potassium hexaflorophosphate (KPF6) dissolved in propylene carbonate was used as electrolyte for all the electrochemical techniques.
Safety Data Sheet (SDS) gave important information for safe chemicals handling and widely used in communicating chemical hazards. Laboratory as one of the places associated with the consumption of a number of chemical...
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The National science Foundation (NSF) was established in 1950 as an Independent Agency of the Federal Government with the broad mission to promote and advance scientific progress in the U.S. This is accomplished prima...
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