Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Protein Complex Assembly02:41

Protein Complex Assembly

16.9K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
16.9K
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

3.0K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
3.0K
Complex Numbers01:29

Complex Numbers

324
The real number system cannot represent the square root of a negative number, which restricts solutions for certain equations, such as quadratics with negative discriminants. To address this, the complex number system was developed, introducing the imaginary unit i, where i = √(-1). This extension allows for the representation of all roots, including those involving negative radicands.A complex number is written in the form x + yi, where x and y are real numbers. Here, x represents the...
324
Formation of Complex Ions03:45

Formation of Complex Ions

26.2K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
26.2K
Complex Power01:14

Complex Power

931
Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
931
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

871
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
871

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Biomass Demineralization: A Critical Need for Future Biorefineries.

Chemical reviews·2026
Same author

Biochar, zeolite, and ferric chloride effectively separate phosphorus and nitrogen (plus potassium) in swine manure: A coagulation-flocculation-sedimentation approach.

Chemosphere·2025
Same author

Impact of biochar-based slow-release N-fertilizers on maize growth and nitrogen recovery efficiency.

Journal of environmental quality·2023
Same author

Evaluation of TiO<sub>2</sub> Based Photocatalytic Treatment of Odor and Gaseous Emissions from Swine Manure with UV-A and UV-C.

Animals : an open access journal from MDPI·2021
Same author

Design and Testing of Mobile Laboratory for Mitigation of Gaseous Emissions from Livestock Agriculture with Photocatalysis.

International journal of environmental research and public health·2021
Same author

Pilot-Scale Testing of UV-A Light Treatment for Mitigation of NH<sub>3</sub>, H<sub>2</sub>S, GHGs, VOCs, Odor, and O<sub>3</sub> Inside the Poultry Barn.

Frontiers in chemistry·2020

Related Experiment Video

Updated: Feb 13, 2026

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
08:01

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Published on: June 28, 2019

7.9K

Arsenic sorption on zero-valent iron-biochar complexes.

Santanu Bakshi1, Chumki Banik2, Samuel J Rathke3

  • 1Department of Environmental Sciences, The Connecticut Agricultural Experiment Station, New Haven, CT 06511, USA.

Water Research
|March 20, 2018
PubMed
Summary

Zero-valent iron (ZVI)-biochar complexes effectively remove toxic arsenic (As5+) from contaminated drinking water. Pyrolyzing biomass with iron ore rapidly produces these low-cost, efficient arsenic sorbents.

Keywords:
ArsenicBiocharCo-precipitationContaminated drinking waterPyrolysisZero valent iron

More Related Videos

Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry
07:27

Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry

Published on: January 5, 2024

4.0K
Assessment of Waste-Derived Biochars on the Health and Biological Activity of Soil
10:31

Assessment of Waste-Derived Biochars on the Health and Biological Activity of Soil

Published on: October 10, 2025

674

Related Experiment Videos

Last Updated: Feb 13, 2026

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
08:01

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Published on: June 28, 2019

7.9K
Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry
07:27

Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry

Published on: January 5, 2024

4.0K
Assessment of Waste-Derived Biochars on the Health and Biological Activity of Soil
10:31

Assessment of Waste-Derived Biochars on the Health and Biological Activity of Soil

Published on: October 10, 2025

674

Area of Science:

  • Environmental Science
  • Materials Science
  • Water Treatment

Background:

  • Arsenic contamination in drinking water poses a significant human health risk, particularly in regions like India and Bangladesh.
  • Existing arsenic removal methods are often costly or inefficient, highlighting the need for economical and effective alternatives.
  • Biochar modification offers a promising avenue for developing low-cost sorbents for arsenic remediation.

Purpose of the Study:

  • To investigate the efficacy of zero-valent iron (ZVI)-biochar complexes for removing pentavalent arsenic (As5+) from contaminated drinking water (CDW).
  • To explore the production of ZVI-biochar complexes via high-temperature pyrolysis of biomass and magnetite.
  • To elucidate the arsenic removal mechanisms, including redox reactions and co-precipitation.

Main Methods:

  • Batch equilibration and column leaching studies were conducted to assess arsenic removal efficiency.
  • X-ray Photoelectron Spectroscopy (XPS) As 3d analysis was used to determine the oxidation state of arsenic.
  • Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS) and X-ray Diffraction (XRD) were employed to analyze material composition and structure.

Main Results:

  • ZVI-biochar complexes demonstrated effective removal of As5+ from CDW across a pH range of approximately 7-7.5, even in the presence of competing ions.
  • XPS analysis confirmed the reduction of As5+ to As3+, coupled with the oxidation of Fe(0) to Fe(3+).
  • SEM-EDS and XRD revealed the isomorphous substitution of As3+ for Fe3+ in newly formed iron oxyhydroxides on biochar surfaces, indicating co-precipitation.

Conclusions:

  • ZVI-biochar complexes are highly effective for removing As5+ from contaminated drinking water.
  • The pyrolyzing process at 900°C efficiently produces ZVI-biochar complexes from biomass and low-cost iron ores.
  • These ZVI-biochar complexes show significant potential for low-cost, large-scale application in arsenic-contaminated water treatment.