|North-Central Section - 42nd Annual Meeting (24–25 April 2008)|
|Paper No. 3-10|
|Presentation Time: 11:20 AM-11:40 AM|
CHEMICAL CHARACTERIZATION OF AMD WATERS AND SEDIMENTS AT ABANDONED COAL MINES OF SOUTHEASTERN OHIO
ZHANG, Qian, Environmental Studies, Ohio University, 316 Clippinger Laboratories, Athens, OH 45701, email@example.com and LOPEZ, Dina L., Geological Sciences, Ohio Univ, 316 Clippinger Laboratories, Athens, OH 45701|
Acid mine drainage (AMD) is a serious environmental problem around SE Ohio. Overall, there are three main cations that contaminate waters in southeastern Ohio: iron, aluminum, and manganese. Iron is the major heavy metal and it is always the most abundant of the three, with variable concentrations of aluminum and manganese. Some watersheds have abundant rock alkalinity due to the presence of carbonate rocks, and calcium can be also an important cation in the water and sediments. The abundant precipitates that form in acid mine waters is of great concern because even if the waters are remediated with the addition of alkalinity, the bottom of the streams is covered with the fine precipitates, which are formed mainly by iron hydroxides. These fine sediments do not allow a full recovery of remediated AMD impacted streams. The need to separate these sediments from the stream and use them in some industrial application is evident. Sediments and water samples were collected at four different acid mine drainage sites in SE Ohio. These sites have contrasting chemical composition in terms of the ions Ca, Fe, Mn, and Al. In this work, we present the chemical characterization of sediments deposited in the four types of waters: waters with relatively low Al, Mn, and Ca and high Fe, waters with high Al that show higher water-rock interaction, waters with high Mn, and waters with high Ca and neutral to alkaline pH that reflect the presence of carbonate rocks in the watershed. Preliminary results suggest that the sediments with higher concentrations of heavy metals are those deposited from alkaline waters high in Ca.
North-Central Section - 42nd Annual Meeting (24–25 April 2008)
General Information for this Meeting
|Session No. 3|
Environmental Controls and Human Impacts on Stream Biota of Ohio’s Western Allegheny Plateau
Casino Aztar Conference Center: Las Vegas
7:50 AM-12:00 PM, Thursday, 24 April 2008
Geological Society of America Abstracts with Programs, Vol. 40, No. 5, p. 7
© Copyright 2008 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.