Geochemical characteristics of arsenic in groundwater during riverbank filtration: a case study of Liao River, Northeast China

Abstract Affected by groundwater exploitation in the riverside, the infiltration of river water to recharge groundwater will cause changes in the groundwater environment, which has an important impact on the geochemical behavior of arsenic in groundwater. In this study, the groundwater environment zones in the process of river water infiltration were divided, and the arsenic content in groundwater in the study area had a good correlation with the environment zones. In the weak oxidation environment zone and the weak reductive environment zone, as the distance from the riverbank increased, the arsenic content gradually increased. In the reduction environment zone, there was a decreasing trend in arsenic content in groundwater. The arsenic content in groundwater varied significantly with the seasons, and its dynamic characteristics were closely related to the water level. The arsenic content in groundwater decreased with the rise in groundwater level, and it responded obviously to the change of water level in the shallows. Overall, arsenic entered the groundwater from the solid phase through adsorption and desorption of exchangeable arsenic and exchangeable iron, and reductive dissolution of iron or manganese oxides bound iron in the medium during riverbank filtration.

Download Full-text

Assessment of river water infiltration conditions based on both chloride mass-balance and hydrogeological setting: the Krajkowo riverbank filtration site (Poland)

Geologos ◽

10.2478/logos-2021-0003 ◽

2021 ◽

Vol 27 (1) ◽

pp. 35-41

Author(s):

Jozef Gorski ◽

Krzysztof Dragon ◽

Roksana Kruc-Fijalkowska ◽

Magdalena Matusiak

Keyword(s):

Surface Water ◽

River Water ◽

Water Infiltration ◽

Riverbank Filtration ◽

Superficial Zone ◽

Well Production ◽

Lower Chloride ◽

Average Contribution ◽

Strong Erosion ◽

Chloride Concentrations

Abstract In the present work measurements of chloride concentrations were used to assess the variability of infiltration conditions and contributions of surface water and local groundwater to the discharge of wells at Krajkowo riverbank filtration site (western Poland). Tests were performed on samples from 26 wells located in a well gallery close to the River Warta. Due to higher chloride concentrations in river water in comparison with local groundwater, significant differences in concentrations in samples from individual wells were noted. In particular, lower chloride concentrations in 11 wells were recorded, which can be linked to the local occurrence of low-permeability deposits in the superficial zone; a locally higher degree of riverbed sediment clogging in the highly convex meandering zone, where strong erosion of the riverbed occurred, which in turn led to increased clogging; the occurrence of a more intensive groundwater inflow into the river valley due to water infiltration from a smaller river entering the River Warta valley, as well as unfavourable conditions for the infiltration of surface water to the lower part of the aquifer with a greater thickness. Differences in chloride concentrations observed were also used to quantify approximately river water contribution to the well production. The average contribution of the River Warta to the recharge of the entire well gallery was estimated at 59.8%.

Download Full-text

Evaluation of the Impact of Ecological Water Supplement on Groundwater Restoration Based on Numerical Simulation: A Case Study in the Section of Yongding River, Beijing Plain

Water ◽

10.3390/w13213059 ◽

2021 ◽

Vol 13 (21) ◽

pp. 3059

Author(s):

Zijian Ji ◽

Yali Cui ◽

Shouquan Zhang ◽

Wan Chao ◽

Jingli Shao

Keyword(s):

Water Level ◽

Groundwater Level ◽

Positive Impact ◽

Water Infiltration ◽

River Channels ◽

Affected Area ◽

Groundwater Environment ◽

The Impact ◽

The Yongding River ◽

Yongding River

Ecological water supplement relies on river channels to introduce surface water, to make a reasonable supplement of groundwater, to repair the regional groundwater environment and urban river ecosystem. Evaluating the degree of groundwater restoration after ecological water supplement (by taking appropriate measures) is a critical problem that needs to be solved. Thus, based on the Yongding River ecological water supplement in 2019 and 2020, we analyzed the groundwater monitoring situates in the ecological water supplement region. We established an unstructured groundwater flow numerical model in the study area through the quadtree grids. The model was calibrated with the measured water level. The simulated results could accurately reflect the real groundwater dynamic characteristics, and it showed that the water level rise was concentrated in the 3–6 km range of the Yongding River after the ecological water supplement. In 2019, the calculated ecological water infiltration amount was 101.28 × 106 m3, the affected area was 265.19 km2, and the average groundwater level rise in the affected area was 2.10 m. In 2020, the calculated ecological water infiltration amount was 102.64 × 106 m3, the affected area was 506.88 km2, and the average groundwater level rise in the affected area was 1.25 m. While the ecological water supplement had a positive impact on groundwater level restoration, the groundwater level around the typical buildings within the study area, including Beijing West Railway Station and Beijing Daxing International Airport, would not be significantly affected.

Download Full-text

The fate of arsenic in groundwater discharged to the Meghna River, Bangladesh

Environmental Chemistry ◽

10.1071/en17104 ◽

2018 ◽

Vol 15 (2) ◽

pp. 29 ◽

Cited By ~ 3

Author(s):

Michelle Berube ◽

Katrina Jewell ◽

Kimberly D. Myers ◽

Peter S. K. Knappett ◽

Pin Shuai ◽

...

Keyword(s):

River Water ◽

Solid Phase ◽

Sediment Cores ◽

Hydrologic Processes ◽

Reactive Barrier ◽

Arsenic In Groundwater ◽

Phosphate Leaching ◽

Induced Changes ◽

The Ganges ◽

The Impact

Environmental contextArsenic contamination of groundwater is a major environmental problem in many areas of the world. In south-east Asia, iron-rich reducing groundwater mixes with oxidising river water in hyporheic zones, precipitating iron oxides. These oxides can act as a natural reactive barrier capable of accumulating elevated solid-phase concentrations of arsenic. AbstractShallow, anoxic aquifers within the Ganges–Brahmaputra–Meghna Delta (GBMD) commonly contain elevated concentrations of arsenic (As), iron (Fe) and manganese (Mn). Highly enriched solid-phase concentrations of these elements have been observed within sediments lining the banks of the Meghna River. This zone has been described as a Natural Reactive Barrier (NRB). The impact of hydrological processes on NRB formation, such as transient river levels, which drive mixing between rivers and aquifers, is poorly understood. We evaluated the impact of groundwater flow dynamics on hydrobiogeochemical processes that led to the formation of an Fe- and Mn-rich NRB containing enriched As, within a riverbank aquifer along the Meghna River. The NRB dimensions were mapped using four complementary elemental analysis methods on sediment cores: X-ray fluorescence (XRF), aqua regia bulk extraction, and HCl and sodium phosphate leaching. It extended from 1.2 to 2.4 m in depth up to 15 m from the river’s edge. The accumulated As was advected to the NRB from offsite and released locally in response to mixing with aged river water. Nearly all of the As was subsequently deposited within the NRB before discharging to the Meghna. Significant FeII release to the aqueous phase was observed within the NRB. This indicates the NRB is a dynamic zone defined by the interplay between oxidative and reductive processes, causing the NRB to grow and recede in response to rapid and seasonal hydrologic processes. This implies that natural and artificially induced changes in river stages and groundwater-tables will impact where As accumulates and is released to aquifers.

Download Full-text

REAL-TIME ANORMALY DETECTION OF RIVER WATER LEVEL OBSERVATION BASED ON PROBABILITY DISTRIBUTION OF WATER LEVEL ESTIMATION ERROR

Journal of Japan Society of Civil Engineers Ser B1 (Hydraulic Engineering) ◽

10.2208/jscejhe.75.2_i_193 ◽

2019 ◽

Vol 75 (2) ◽

pp. I_193-I_198

Author(s):

Masayuki HITOKOTO ◽

Noriko KAWAGOE ◽

Hajime HASHIDA ◽

Yuichi SEI ◽

Kazutomo FUSAMAE

Keyword(s):

Probability Distribution ◽

Water Level ◽

Real Time ◽

River Water ◽

Estimation Error

Download Full-text

Polarographic and Voltammetric Determination of Trace Amounts of 3-Nitrofluoranthene

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20061571 ◽

2006 ◽

Vol 71 (11-12) ◽

pp. 1571-1587 ◽

Cited By ~ 6

Author(s):

Karel Čížek ◽

Jiří Barek ◽

Jiří Zima

Keyword(s):

River Water ◽

Solid Phase ◽

Mercury Electrode ◽

Stripping Voltammetry ◽

Differential Pulse ◽

Differential Pulse Polarography ◽

Pulse Polarography ◽

Dropping Mercury Electrode ◽

Separation And Preconcentration

The polarographic behavior of 3-nitrofluoranthene was investigated by DC tast polarography (DCTP) and differential pulse polarography (DPP), both at a dropping mercury electrode, differential pulse voltammetry (DPV) and adsorptive stripping voltammetry (AdSV), both at a hanging mercury drop electrode. Optimum conditions have been found for its determination by the given methods in the concentration ranges of 1 × 10-6-1 × 10-4 mol l-1 (DCTP), 1 × 10-7-1 × 10-4 mol l-1 (DPP), 1 × 10-8-1 × 10-6 mol l-1 (DPV) and 1 × 10-9-1 × 10-7 mol l-1 (AdSV), respectively. Practical applicability of these techniques was demonstrated on the determination of 3-nitrofluoranthene in drinking and river water after its preliminary separation and preconcentration using liquid-liquid and solid phase extraction with the limits of determination 4 × 10-10 mol l-1 (drinking water) and 2 × 10-9 mol l-1 (river water).

Download Full-text