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Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Precipitation and Co-precipitation01:17

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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

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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)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
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Related Experiment Video

Updated: Sep 7, 2025

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
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Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites

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Functionalized biochars: Synthesis, characterization, and applications for removing trace elements from water.

Yasir Hamid1, Lei Liu1, Muhammad Usman2

  • 1Ministry of Education (MOE) Key Lab of Environ. Remediation and Ecol. Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China.

Journal of Hazardous Materials
|June 17, 2022
PubMed
Summary
This summary is machine-generated.

Functionalized biochar enhances water purification by improving adsorption of trace elements. This review details synthesis, characterization, and applications of engineered biochars for effective water treatment.

Keywords:
Functional biocharRemediationSorptionTrace elementsWater and wastewater treatment

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Area of Science:

  • Environmental Science
  • Materials Science
  • Chemistry

Background:

  • Biochar (BC) effectively removes trace elements (TEs) from water.
  • Pristine biochar has limitations: low surface functionality and small pore size.
  • Functionalized biochars overcome these limitations through activation.

Purpose of the Study:

  • To provide a comprehensive review of functionalized/engineered biochars for TE removal from water.
  • To evaluate synthesis, characterization, and application methods.
  • To identify future research directions.

Main Methods:

  • Review of synthesis strategies: physical, chemical, and biological activation.
  • Description of characterization techniques: SEM, TEM, EDS, XRD, XANES/NEXAFS, XPS, FTIR, Raman spectroscopy.
  • Critical evaluation of adsorption efficiency, mechanisms, and fate of TEs.

Main Results:

  • Functionalized biochars exhibit improved physico-chemical properties and adsorption efficiency.
  • Various synthesis and characterization methods are detailed.
  • Factors affecting sorption, mechanisms, and challenges in TE removal are discussed.

Conclusions:

  • Functionalized biochar is a promising material for removing trace elements from contaminated water.
  • Further research is recommended to optimize applications and address challenges.
  • This review serves as a resource for utilizing engineered biochar in environmental remediation.