Iron Extraction Characteristics of Sediment Samples from a River Bank Filtration Site

Abstract

: River bank filtration has been considered as a promising alternative water management scheme, in which groundwater is extracted from an aquifer near a river after infiltration of the river water into the aquifer, thereby improving and maintaining the quality of water recovered. Iron (Fe) associated with sediment in contact with groundwater and infiltrating surface water is an important factor in determining the quality of water recovered from the pumping wells in river bank filtration. This study reports the results of Fe speciation in the aquifer sediment samples collected from different depths at the river bank filtration site in Changwon, studied using four different chemical extraction methods, namely, ferrozine, oxalate, HCl, and DCB methods. Overall, the results show that Fe(II) as well as the total Fe content decreases with depth down to ∼20 m and then increases further below. This trend is consistent with the redox characteristics suggested by visual observation. The silt/clay size fraction (ø < 62.5 µm) has up to 2∼10 times more Fe compared with the sand size fraction (62.5 µm < ø < 2 mm), depending on the extraction method. Of the four extraction methods, DCB solution

Evaluating Effects of Membrane Filter Pore Sizes on Determination of Dissolved Concentrations of Major Elements in Groundwater and Surface Water Near Nakdong River

“…Hem and Robertson(1967) (Shiller et al, 1987;Taylor et al, 1990;Waber et al, 1990). 들 상위에 제4기의 충적층이 부정합으로 피복하고 있다 (Hamm et al, 2002;Hyun et al, 2013 (Fig. 2).…”

Analytical Evaluation of Interference and Ratio of River Water at Riverbank Filtration Pumping Wells

“…우리나라에서 강변여과수는 낙동강 주변에서 가장 활 발하게 개발되고 있는데 낙동강 하류 지역에서는 철과 망 간 등의 농도가 높게 나타나고 있어 대수층 기원의 수질 오염물질의 기원과 대책에 대한 연구가 많이 수행되었다 (Kim et al, 2009, Hyun et al, 2013. 또한하천수에서나타나는 오염물의 대수층 내거동에 대한 연구도 수행되고 있다 (Hyun et al, 2013).…”

“…또한하천수에서나타나는 오염물의 대수층 내거동에 대한 연구도 수행되고 있다 (Hyun et al, 2013). 그러나 강변여 과로 야기되는 대수층 내 흐름에 대한 수량 측면의 연구 는 상대적으로 빈약한 편이며 다음과 같은 최근의 연구결 과가 보고된 바 있다.…”