Effect of irrigation on Fe(III)–SO42− redox cycling and arsenic mobilization in shallow groundwater from the Datong basin, China: Evidence from hydrochemical monitoring and modeling

Xie, Xianjun; Wang, Yanxin; Yu, Qian; Wu, Ya; Su, Chunli; Duan, Mengyu

doi:10.1016/j.jhydrol.2015.01.035

Cited by 49 publications

(10 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydraulic properties may also determine how fast As is released from freshly deposited river sediments and moves into an aquifer under the influence of urban pumping causing localized losing stream conditions in the river (Stahl et al ). Finally, aqueous‐phase concentrations of As have been found to oscillate seasonally in riverbank aquifers with monsoonal climates (Xie et al ; Schaefer et al ). Therefore, to accurately predict the volumetric and mass fluxes of water and dissolved metals within a riverbank aquifer, novel approaches are needed to accurately characterize the hydraulic properties of riverbank aquifers.…”

Section: Introductionmentioning

confidence: 99%

The Impact of the Degree of Aquifer Confinement and Anisotropy on Tidal Pulse Propagation

Shuai¹,

Knappett

Hossain

et al. 2017

Groundwater

View full text Add to dashboard Cite

Oceanic tidal fluctuations which propagate long distances up coastal rivers can be exploited to constrain hydraulic properties of riverbank aquifers. These estimates, however, may be sensitive to degree of aquifer confinement and aquifer anisotropy. We analyzed the hydraulic properties of a tidally influenced aquifer along the Meghna River in Bangladesh using: (1) slug tests combined with drilling logs and surface resistivity to estimate Transmissivity (T); (2) a pumping test to estimate T and Storativity (S) and thus Aquifer Diffusivity (D ); and (3) the observed reduction in the amplitude and velocity of a tidal pulse to calculate D using the Jacob-Ferris analytical solution. Average Hydraulic Conductivity (K) and T estimated with slug tests and borehole lithology were 27.3 m/d and 564 m /d, respectively. Values of T and S determined from the pumping test ranged from 400 to 500 m /d and 1 to 5 × 10 , respectively with D ranging from 9 to 40 × 10 m /d. In contrast, D estimated from the Jacob-Ferris model ranged from 0.5 to 9 × 10 m /d. We hypothesized this error resulted from deviations of the real aquifer conditions from those assumed by the Jacob-Ferris model. Using a 2D numerical model tidal pulses were simulated across a range of conditions and D was calculated with the Jacob-Ferris model. Moderately confined (K /K < 0.01) or anisotropic aquifers (K /K > 10) yield D within a factor of 2 of the actual value. The order of magnitude difference in D between pumping test and Jacob-Ferris model at our site argues for little confinement or anisotropy.

show abstract

Section: Introductionmentioning

confidence: 99%

The Impact of the Degree of Aquifer Confinement and Anisotropy on Tidal Pulse Propagation

Shuai¹,

Knappett

Hossain

et al. 2017

Groundwater

View full text Add to dashboard Cite

show abstract

“…This may be in part because such interactions could plausibly affect groundwater As in opposite ways and would therefore be difficult to disentangle. On one hand, the reduction of sulfur supplied by recent recharge or organic matter in the sediment could lead to the formation of insoluble As sulfides or the sequestration of As in iron sulfide phases (O’Day et al, 2004; Kirk et al, 2004; Lowers et al, 2007; Hery et al, 2010; Kocar et al, 2010; Xie et al, 2015). Without direct evidence from sediment analysis but on the basis of an extensive set of groundwater data, Buschmann and Berg (2009) made a convincing case that sulfate reduction had an inhibiting effect on the release of As to groundwater in South and Southeast Asia.…”

Section: Introductionmentioning

confidence: 99%

Evidence of decoupling between arsenic and phosphate in shallow groundwater of Bangladesh and potential implications

Aziz

Bostick

Zheng

et al. 2017

Applied Geochemistry

View full text Add to dashboard Cite

Reductive dissolution of iron oxyhydroxides and reduction of arsenic are often invoked as leading causes of high dissolved As levels in shallow groundwater of Bangladesh. The second of these assumptions is questioned here by comparing the behavior As and phosphate (P), a structural analogue for As (V) which also adsorbs strongly to Fe oxyhydroxides but is not subject to reduction. The first line of evidence is provided by a detailed groundwater time-series spanning two years for three wells in the 6–9 m depth range showing removal of As(III) from shallow groundwater during the monsoon without of loss of P. The data indicate a loss of ~90% of the dissolved As from groundwater in the intermediate well relative to a level of 3 μmol/L As predicted by conservative mixing between groundwater sampled from the shallower and the deeper well. In contrast, P concentrations of ~30 μmol/L in the intermediate well closely match the prediction from conservative mixing. Reduction therefore appears to inhibit the release of As to groundwater at this site relative to P instead of enhancing it. A re-analysis of existing groundwater As and P data from across the country provides a broader context for this finding and confirms that, without reduction, elevated concentrations of As would probably be even more widespread in shallow aquifers of Bangladesh. Without providing definite proof, X-ray absorption spectroscopy of sediment from the time-series site and elsewhere suggests that the loss of As from groundwater may be coupled to precipitation of As sulfide. Further study is needed to assess the implications of these observations for shallow aquifers that have been subjected to increased withdrawals for irrigation in recent decades.

show abstract

“…Among the inorganic species found in bank-filtered water, Fe has drawn the most attention from researchers (Ray, 2002;Kedziorek et al, 2009;Othman et al, 2015;Grischek & Paufler, 2017). Although Fe is non-toxic, its presence could be associated with that of toxic metals in the filtrate because some Fe minerals in the aquifer might contain Mn, arsenic (As), nickel (Ni), and zinc (Zn) as trace elements (Dowling et al, 2002;Lorenzen et al, 2010;Xie et al, 2015). In addition, Fe precipitates may clog the wells and the aquifer porous network, thereby reducing the overall efficiency of RBF systems (Antoniou et al, 2012;Grischek et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Identification of iron and sulfate release processes during riverbank filtration using chemical mass balance modeling

Kang

Stuyfzand

et al. 2021

Environ Geochem Health

View full text Add to dashboard Cite

show abstract

Effect of irrigation on Fe(III)–SO42− redox cycling and arsenic mobilization in shallow groundwater from the Datong basin, China: Evidence from hydrochemical monitoring and modeling

Cited by 49 publications

References 55 publications

The Impact of the Degree of Aquifer Confinement and Anisotropy on Tidal Pulse Propagation

The Impact of the Degree of Aquifer Confinement and Anisotropy on Tidal Pulse Propagation

Evidence of decoupling between arsenic and phosphate in shallow groundwater of Bangladesh and potential implications

Identification of iron and sulfate release processes during riverbank filtration using chemical mass balance modeling

Contact Info

Product

Resources

About