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Voltammetry: Stripping Methods

Voltammetry: Stripping Methods

Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
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Updated: Jul 9, 2026

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for Cu(II) Through Microwave Pre-Pyrolysis

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Surface-modified carbon black for As(V) removal.

Dipu Borah¹, Shigeo Satokawa, Shigeru Kato

¹Department of Materials and Life Science, Faculty of Science and Technology, Seikei University, 3-3-1 Kichijoji Kitamachi, Musashino-shi, Tokyo 180-8633, Japan.

Journal of Colloid and Interface Science

|December 18, 2007

Summary

Modified carbon black effectively removes arsenic(V) through surface complexation, with adsorption kinetics following a pseudo-second-order model. This study details the physicochemical principles behind enhanced arsenic removal using acid-treated carbon black.

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Last Updated: Jul 9, 2026

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for Cu(II) Through Microwave Pre-Pyrolysis

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for Cu(II) Through Microwave Pre-Pyrolysis

Published on: February 12, 2019

Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy

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Published on: February 5, 2017

Area of Science:

Environmental Chemistry
Materials Science

Background:

Arsenic(V) contamination poses significant environmental and health risks.
Developing efficient adsorbents for arsenic removal is crucial for water purification.

Purpose of the Study:

To evaluate the As(V) adsorption performance of commercial carbon black and its sulfuric acid-modified form.
To investigate the influence of process parameters and physicochemical principles on arsenic adsorption.

Main Methods:

Characterization of carbon black using BET, SEM, FTIR, and TGA.
Batch equilibrium adsorption experiments to study kinetics and thermodynamics.
Modeling adsorption data using Langmuir, Freundlich, and DKR isotherm equations.

Main Results:

Acid modification altered carbon black morphology, increased surface area, and introduced sulfonic acid groups, lowering the point of zero charge to pH 3.5.
Adsorption followed pseudo-second-order kinetics, with intraparticle diffusion not being rate-limiting.
Maximum As(V) uptake occurred at pH 4-5, indicating surface complexation as the primary adsorption mechanism.

Conclusions:

Sulfuric acid modification significantly enhances the As(V) adsorption capacity of carbon black.
Surface complexation is the dominant mechanism for As(V) removal by the modified carbon black.
The modified carbon black shows promise as an effective adsorbent for arsenic remediation.