Arsenic Removal
Arsenic Removal - Related Videos
08:01
Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
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Cited by 4 •
2019
In this work, we prepared an adsorbent composed of the cationic N,N-dimethylamino propylacrylamide methyl chloride quaternary (DMAPAAQ) polymer gel and iron hydroxide for adsorbing arsenic from groundwater. The gel was prepared via a novel method designed to ensure the maximum content of iron particles in its structure.
08:21
Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.
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Cited by 12 •
2017
The usefulness of an analytical method to determine inorganic arsenic in a wide range of food matrices is demonstrated. The method consists of selective extraction of inorganic arsenic into chloroform with a final determination by hydride generation-atomic absorption spectrometry.
09:24
In Vitro Scratch Assay to Demonstrate Effects of Arsenic on Skin Cell Migration
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Cited by 44 •
2019
This study focuses on an in vitro model of wound healing (scratch assay) as a mechanism for determining how environmental contaminants such as arsenic influence cellular migration. The results demonstrate that this in vitro assay provides rapid and early indications of changes to cellular migration prior to in vivo experimentation.
09:23
Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
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Cited by 6 •
2015
Production bleed water (PBW) was treated with cupric oxide nanoparticles (CuO-NPs) and cellular toxicity was assessed in cultured human cells. The goal of this protocol was to integrate the native environmental sample into a cell culture format assessing the changes in toxicity due to CuO-NP treatment.
06:43
Rotary Evaporation to Remove Solvent
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2023
Source: Dr. Melanie Pribisko Yen and Grace Tang — California Institute of Technology Rotary evaporation is a technique most commonly used in organic chemistry to remove a solvent from a higher-boiling point compound of interest. The rotary evaporator, or "rotovap", was invented in 1950 by the chemist Lyman C. Craig. The primary use of a rotovap is to dry and purify samples for downstream applications. Its speed and ability to handle large volumes of solvent make rotary evaporation a preferred...
FAQs
Oxidizing arsenite, As(III), to arsenate, As(V), changes the species available for downstream capture. Arsenate binds more readily to iron or aluminum hydroxides, while arsenite is more mobile. This conversion therefore supports adsorption or coprecipitation and can improve the effectiveness of a treatment sequence when arsenic speciation is appropriate.
Iron and aluminum hydroxides provide surfaces that can bind arsenate during adsorption. They can also participate in coprecipitation, in which arsenic becomes associated with hydroxide solids as those materials form. Because arsenate interacts more readily with these hydroxides than arsenite, hydroxide-based treatment is closely linked to the preceding chemical conversion step.
Performance depends on the arsenic species present, solution pH, competing ions, and the properties of the treatment material. These factors affect how strongly arsenic interacts with iron or aluminum hydroxides and whether adsorption or coprecipitation proceeds effectively. Chemical characterization helps identify the limiting conditions and guides treatment selection and optimization.
Adsorption and coprecipitation rely on interactions between arsenic and iron or aluminum hydroxides, often after converting As(III) to As(V). Ion exchange and membrane filtration provide different treatment pathways rather than relying on that hydroxide-binding mechanism. The appropriate option depends on arsenic speciation, water chemistry, competing ions, and treatment-material properties.
A practical workflow begins with chemical characterization of the water or wastewater, including arsenic speciation and relevant solution conditions. Researchers can then evaluate whether conversion to As(V) followed by hydroxide-based capture is suitable, or whether ion exchange or membrane filtration is more appropriate. Performance testing under representative conditions supports process optimization.
The approach is relevant to drinking-water treatment, industrial wastewater management, and remediation of contaminated sites. In each setting, treatment must account for the chemical form of arsenic and its interactions with the selected material or process. Effective control can reduce exposure risks for people and limit the movement of arsenic into aquatic systems.