Fingerprinting inorganic arsenic and organoarsenic compounds in in situ oil shale retort and process waters using a liquid chromatograph coupled with an atomic absorption spectrometer as a detector

Evaluation of liquid chromatography inductively coupled plasma mass spectrometry for arsenic speciation in water from industrial treatment of shale

“…Although AsB and p-ASA have been used in the optimization step, these species could not be identified in the samples. Among the other arsenic species present in the samples might be phenylarsonic and methylarsonic acids [2] and thioarsenic species, since the sulfur concentration is high in the samples [29,30], which could promote the formation of thioarsenic species.…”

“…Purifying is usually made by water washing of the raw shale, partially retorted shale and oil shale. The water that comes from the retort shale contains a high amount of organic substances (mainly phenols and sulfur-containing compounds), as well as a great number of trace metals and metalloids that are potentially toxic for aquatic biota and humans [2]. Among the trace elements, arsenic can be found at relatively high concentration and in quite different forms [3].…”

“…Although inorganic and organic arsenic compounds have already been determined in a variety of materials, little information is available in the literature with respect to arsenic speciation in oil shale [2,21,22] and related wastes [2]. The aim of this work was to develop a method for arsenic speciation analysis in aqueous effluent from shale processing using LC-ICP-MS. Parameters related to sample preparation, As species separation and quantification by LC were evaluated (pH of sample and mobile phase, mobile phase flow rate, mobile phase concentration and column conditioning).…”

In situ ATR–FTIR and surface complexation modeling studies on the adsorption of dimethylarsinic acid and p-arsanilic acid on iron-(oxyhydr)oxides

“…In addition, organic forms of arsenic, including methylated and aromatic compounds, are synthesized during the pyrolysis of oil shale [3,11,12]. Arsenic content in energy sources continues to be a challenge to the energy industry because these compounds are potent catalyst poisons, hindering the optimum use of these fuels and their conversion into useful feedstocks [3].…”

Speciation of trace elements with special reference to the use of radioanalytical methods

“…Conventional ion-exchange chromatography for the separation of several arsenic species. Faust [406] demonstrated the speciation of As(III), As(V), MMAA, DMAA and PAA (phenylarsonic acid) in process water samples by anion-exchange HPLC with gradient elution and detection by GFAAS. Complete identification of all arsenic species in these process water samples was impossible; only fingerprints for different water samples were register&,…”