Preserving the Distribution of Inorganic Arsenic Species in Groundwater and Acid Mine Drainage Samples

As(iii)/As(v) ratio determined from orthophosphoric acid extraction/HPLC-ICP-MS matched XANES results, allowing routine measurement of As oxidation state in acid mine drainage precipitates.

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Release of arsenite, arsenate and methyl-arsenic species from streambed sediment affected by acid mine drainage: a microcosm study

Environmental Chemistry ◽

10.1071/en13225 ◽

2014 ◽

Vol 11 (5) ◽

pp. 514 ◽

Cited By ~ 13

Author(s):

Marina Héry ◽

Corinne Casiot ◽

Eléonore Resongles ◽

Zoe Gallice ◽

Odile Bruneel ◽

...

Keyword(s):

Acid Mine Drainage ◽

Microbial Activity ◽

Mine Drainage ◽

Arsenic Species ◽

Low Flow ◽

Main Process ◽

Anoxic Conditions ◽

Mining Sites ◽

Acid Mine ◽

Set Up

Environmental context Arsenic-rich waters generated from the oxidation of mining wastes are responsible for the severe contamination of river waters and sediments located downstream from mining sites. Under certain environmental conditions, the affected riverbed sediments may represent a reservoir for arsenic from which this toxic element may be released into water, mainly as a consequence of microbial activity. Abstract The (bio-)geochemical processes driving As mobilisation from streambed sediments affected by acid mine drainage (AMD) were investigated, and the structure of the bacterial community associated with the sediments was characterised. Microcosm experiments were set up to determine the effect of oxygen, temperature (4 and 20°C) and microbial activity on As mobilisation from contrasting sediments collected during high- (November 2011) and low- (March 2012) flow conditions in the Amous River, that received AMD. Distinct bacterial communities thrived in the two sediments, dominated by Rhodobacter spp., Polaromonas spp. and Sphingomonads. These communities included only few bacteria known for their capacity to interact directly with As, whereas biogeochemical processes appeared to control As cycling. Major As mobilisation occurred in the AsIII form at 20°C in anoxic conditions, from both November and March sediments, as the result of successive biotic reductive dissolution of Mn- and Fe-oxyhydroxides. The later process may be driven by Mn- and Fe-reducing bacteria such as Geobacter spp. and possibly occurred in combination with microbially mediated AsV reduction. The involvement of other bacteria in these redox processes is not excluded. Biomethylation occurred only with the sediments collected at low-flow during oxic and anoxic conditions, although no bacteria characterised so far for its ability to methylate As was identified. Finally, sorption equilibrium of AsV onto the sediment appeared to be the main process controlling AsV concentration in oxic conditions. Comparison with field data shows that the later process, besides biomethylation, may be of relevance to the As fate in AMD-affected streams.

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New preservation method for inorganic arsenic speciation in acid mine drainage samples

Talanta ◽

10.1016/j.talanta.2005.12.034 ◽

2006 ◽

Vol 69 (5) ◽

pp. 1182-1189 ◽

Cited By ~ 23

Author(s):

V. Oliveira ◽

A.M. Sarmiento ◽

J.L. Gómez-Ariza ◽

J.M. Nieto ◽

D. Sánchez-Rodas

Keyword(s):

Acid Mine Drainage ◽

Mine Drainage ◽

Arsenic Speciation ◽

Inorganic Arsenic ◽

Acid Mine ◽

Preservation Method

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Arsenic speciation and sorption in acid mine drainage and the polluted water of the Kosva river basin, Russia

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/962/1/012050 ◽

2022 ◽

Vol 962 (1) ◽

pp. 012050

Author(s):

N F Fetisova

Keyword(s):

Surface Water ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Arsenic Speciation ◽

Inorganic Arsenic ◽

Polluted Water ◽

Surface Complexation Model ◽

Acid Mine ◽

Abandoned Coal Mines

Abstract Acid mine drainage (AMD) of the abandoned coal mines of the Kizelovsky coal basin (the Urals, Russia) is one of the worst natural disasters in the region. Acidic sulphate waters with a high content of metals freely flow into the surface water bodies. Arsenic, found in elevated concentrations in AMD, is an element of concern due to its potential toxicity to humans and animals. The aim of this work is determination of chemical speciation of inorganic arsenic in AMD as well as the surface water and groundwater affected by mine drainage, and assessment the natural removal of As from mine drainage due to adsorption on precipitated hydrous ferric oxide (HFO). Geochemical speciation (PHREEQC) revealed that arsenic occurs in all water samples as As(V). Surface complexation model shows that, HFO induced by the natural attenuation process may remove 46–85% of total arsenic in AMD and only 28% in polluted groundwater (on average).

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Experimental and model studies on comparison of As(III and V) removal from synthetic acid mine drainage by bone char

Mineralogical Magazine ◽

10.1180/minmag.2014.078.1.06 ◽

2014 ◽

Vol 78 (1) ◽

pp. 73-89 ◽

Cited By ~ 6

Author(s):

Jing Liu ◽

Xi Huang ◽

Juan Liu ◽

Weiqing Wang ◽

Wei Zhang ◽

...

Keyword(s):

Acid Mine Drainage ◽

Mine Drainage ◽

Low Cost ◽

Arsenic Species ◽

Breakthrough Curves ◽

Filling Material ◽

Bone Char ◽

Acid Mine ◽

Adsorption Capacities ◽

Adsorption Cycle

AbstractAcid mine drainage (AMD) commonly contains elevated concentrations of As(III) and/or As(V) due to oxidation of arsenic-containing sulfides. Bone char has been used as a low-cost filling material for passive treatment. The breakthrough curves of As(III) and As(V) were studied in column experiments conducted at different flow rates, adsorption cycle times, and with different coexisting cations and anions to compare their transport behaviours. The experimental data were fitted by the Convection- Diffusion Equation (CDE) and Thomas model with the aim of obtaining retardation factors of As(III) and As(V) and their maximum adsorption capacities, respectively. The maximum adsorption capacities of As(III) and As(V) are 0.214 and 0.335 mg/g, respectively. Coexisting Mn2+ and Al3+ ions can shorten the equilibrium time of As(V) adsorption from 25 h to 8 h, but they have little effect on As(III). The retardation factors of As(III) and As(V) calculated by the CDE model decrease with adsorption cycles from 37 to 20 and 51 to 32, respectively. The Mn2+ and Al3+ ions could enhance retention ability with adsorption cycle time, especially Mn2+ for As(V). Secondary adsorption phenomena were observed only in breakthrough curves of As(V) in the presence of Mn2+ and Al3+. The competitive influences of coexisting arsenic species is As(V) > As(III). Regeneration experiments using distilled water and NaOH solution were completed to quantify the degree of desorption of both As(III) and As(V). The results show that As(V) adsorbed on bone char has better desorption performance than As(III), and the average degrees of desorption of As(III) and As(V) for three desorption experiments are 75% and 31%, respectively.

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