A Rapid Field Detection Method for Arsenic in Drinking Water

Baghel, Anuradha; Singh, Beer; Pandey, P. N.; Sekhar, K.

doi:10.2116/analsci.23.135

Cited by 41 publications

(32 citation statements)

References 12 publications

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“…Arsine gas is a toxic gas that can form in the presence of As, acid, and a strong reductant. [40] We did not expect to see arsine gas under the conditions present in this experiment and indeed saw no indication of arsine gas formation using arsine sensitive test strips. Portable arsine gas sensors and dosimeter badges can also be used to monitor for arsine gas formation.…”

Section: Methodsmentioning

confidence: 62%

In situ oxalic acid injection to accelerate arsenic remediation at a superfund site in New Jersey

et al. 2014

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Arsenic is a prevalent contaminant at a large number of US Superfund sites; establishing techniques that accelerate As remediation could benefit many sites. Hundreds of tons of As were released into the environment by the Vineland Chemical Co. in southern New Jersey during its manufacturing lifetime (1949–1994), resulting in extensive contamination of surface and subsurface soils and sediments, groundwater, and the downstream watershed. Despite substantial intervention at this Superfund site, sufficient aquifer cleanup could require many decades if based on traditional pump and treat technologies only. Laboratory column experiments have suggested that oxalic acid addition to contaminated aquifer solids could promote significant As release from the solid phase. To evaluate the potential of chemical additions to increase As release in situ and boost treatment efficiency, a forced gradient pilot scale study was conducted on the Vineland site. During spring/summer 2009, oxalic acid and bromide tracer were injected into a small portion (~50 m2) of the site for 3 months. Groundwater samples indicate that introduction of oxalic acid led to increased As release. Between 2.9 and 3.6 kg of As were removed from the sampled wells as a result of the oxalic acid treatment during the 3-month injection. A comparison of As concentrations on sediment cores collected before and after treatment and analyzed using X-ray fluorescence spectroscopy suggested reduction in As concentrations of ~36% (median difference) to 48% (mean difference). While further study is necessary, the addition of oxalic acid shows potential for accelerating treatment of a highly contaminated site and decreasing the As remediation time-scale.

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Section: Methodsmentioning

confidence: 62%

In situ oxalic acid injection to accelerate arsenic remediation at a superfund site in New Jersey

et al. 2014

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“…Baghel et al used oxalic acid with magnesium as the reductant and it took 10 min to obtain a limit of detection of 10 μg L -1 . 21 However, oxalic acid did not dissolve easily in the small volume samples used in the present study. The results for 100 μg L -1 As(III) and As(V) with the acids tested are summarized in Table 1.…”

Section: Optimization Of Reagentsmentioning

confidence: 53%

High Sensitivity Arsenic Analyzer Based on Liquid-reagent-free Hydride Generation and Chemiluminescence Detection for On-site Water Analysis

et al. 2011

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In this work, a portable and reliable instrument based on manual hydride generation and subsequent ozone induced chemiluminescence analysis was developed and optimized for measurement of aqueous arsenic in drinking water. The aim was to develop a system for use in the field in villages in developing countries where water treatment systems have been installed. Consequently, it is beneficial that the system could be operated without reagent solutions or purified water. Arsenic trihydride (arsine) was generated by reaction with solid acid and solid borohydride, and then introduced to a chemiluminescence cell where the arsine was mixed with ozone to generate chemiluminescence. The measurement could be repeated with the throughput of 60 times h -1 , and the limit of detection was 0.4 μg L -1. The measurable arsenic concentration was up to 1 mg L -1 for 2 mL samples. The system was evaluated for analysis of natural water samples, and the obtained data agreed well with those from ICP-MS and sequential hydride generation flow analysis. We expect this small and inexpensive instrument will be used in developing countries.

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“…Although methods to use molybdoarsenate and dyes exhibited high sensitivity, [15][16][17] the procedures are still complicated. Visual detection of arsenic hydride using auric chloride as a colordeveloping agent was reported, 18 but the gold solution revealed limited stability. As an alternative method, arsenic hydride was trapped in an organic solution of silver diethyldithiocarbamate (Ag(DDTC)) and was accompanied by a characteristic color change of the solution.…”

Section: Introductionmentioning

confidence: 99%

Visual Detection of Arsenic Using Hydride Generation Followed by Reaction with Silver Bis(2-ethylhexyl)dithiocarbamate Retained in a Support Filter

Wakui

Suzuki

2014

ANAL. SCI.

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A Rapid Field Detection Method for Arsenic in Drinking Water

Cited by 41 publications

References 12 publications

In situ oxalic acid injection to accelerate arsenic remediation at a superfund site in New Jersey

In situ oxalic acid injection to accelerate arsenic remediation at a superfund site in New Jersey

High Sensitivity Arsenic Analyzer Based on Liquid-reagent-free Hydride Generation and Chemiluminescence Detection for On-site Water Analysis

Visual Detection of Arsenic Using Hydride Generation Followed by Reaction with Silver Bis(2-ethylhexyl)dithiocarbamate Retained in a Support Filter

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