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Brønsted-Lowry Acids and Bases02:16

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In 1923, the Brønsted–Lowry definition of acids and bases was proposed by Johannes Brønsted and Thomas Lowry. According to this theory, a Brønsted acid is defined as a species that donates a proton in a chemical reaction and gets converted to its conjugate base. A Brønsted base is defined as a species that accepts a proton in a chemical reaction and gets converted into its conjugate acid. These transfers of protons are caused by the displacement of electrons in these reactions, which is...
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Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)
08:12

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)

Published on: May 16, 2016

CR@BaSO4: an acid rain-indicating material.

Hong-Wen Gao1, Xin-Hui Xu

  • 1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. hwgao@tongji.edu.cn

Chemical Communications (Cambridge, England)
|November 5, 2011
PubMed
Summary
This summary is machine-generated.

A new hybrid material, CR@BaSO(4), functions as an acid rain-indicating (ARI) material. When exposed to acid rain (pH 5 or less), an ARI umbrella changes color, reverting when the rain stops, providing a visual alert.

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Area of Science:

  • Materials Science
  • Environmental Science
  • Analytical Chemistry

Background:

  • Acid rain poses environmental risks.
  • Monitoring acid rain levels is crucial for environmental protection.
  • Developing real-time visual indicators for acid rain is needed.

Purpose of the Study:

  • To synthesize and characterize a novel hybrid material for acid rain indication.
  • To evaluate the material's performance as a visual acid rain indicator.
  • To explore the potential of this material for real-time environmental monitoring.

Main Methods:

  • Synthesis of the CR@BaSO(4) hybrid material.
  • Characterization of the synthesized material.
  • Testing the material's colorimetric response to simulated acid rain at different pH levels.

Main Results:

  • The CR@BaSO(4) hybrid was successfully synthesized and characterized.
  • The material exhibited a distinct color change upon exposure to simulated acid rain with a pH of 5 or below.
  • The color change was reversible, with the material returning to its original color after the acid rain exposure ceased.

Conclusions:

  • The CR@BaSO(4) hybrid material is a viable acid rain-indicating (ARI) material.
  • The color-changing properties allow for real-time visual detection of acid rain.
  • This functionalized material offers a potential tool for public awareness and environmental monitoring of acid rain events.