Related Experiment Video
Updated: Sep 23, 2025

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
Published on: June 28, 2019
Removal of arsenic(v) from aqueous solutions using sulfur-doped Fe3O4 nanoparticles
Junhui Liu1, Long Kong1, Xueqiong Huang1
1School of Environmental Science and Engineering, Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China liangli117@sjtu.edu.cn longmao88@sjtu.edu.cn.
Abstract:
In this study, magnetic sulfur-doped Fe3O4 nanoparticles (Fe3O4:S NPs) were applied as adsorbents for the removal of As(v). Fe3O4:S NPs were fabricated by a two-step route, which included low-temperature mixing and high-temperature sintering. The as-prepared Fe3O4:S NPs could effectively remove As(v) under a wide pH range of 2-10 and presented a high As(v) adsorption capacity of 58.38 mg g-1, which was much better than undoped Fe3O4 nanoparticles (20.24 mg g-1). Adsorption experiments exhibited a pseudo-second-order model of adsorption kinetics and a Langmuir isotherm model of adsorption isotherms. Additionally, the coexisting ions such as NO3 -, SO4 2-, and CO3 2- had no significant effect on As(v) adsorption and the adsorbent worked well in actual smelting wastewater. XPS and FTIR spectra of Fe3O4:S NPs before and after As(v) adsorption showed that Fe-OH groups played a significant role in the adsorption mechanisms. Moreover, the magnetic Fe3O4:S NPs adsorbents after adsorption could be rapidly separated from wastewater with an external magnetic field. Therefore, Fe3O4:S NPs could be an ideal candidate for the removal of As(v) from water.
More Related Videos
08:34A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration
Published on: December 5, 2019
08:21Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.
Published on: September 1, 2017
Related Concept Videos
Precipitation and Co-precipitation
Sample Preparation for Analysis: Advanced Techniques
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Extraction: Advanced Methods
Enhanced Elimination of Poison
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
Sulfur Assimilation
Electrophilic Aromatic Substitution: Sulfonation of Benzene