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With the rapid progress of industrialization and urbanization, water pollution has become increasingly prominent. Among them, coal-based granular activated carbon (CGAC) has become one of the core purification materials in the field of water treatment with its efficient adsorption capacity and economic practicality. This article will deeply analyze the key technical indicators, application scenarios and specific impact of CGAC on water treatment effects, and look forward to its future technical trends and market prospects.
Iodine adsorption value: a key parameter to measure the degree of development of the microporous structure of activated carbon, reflecting the removal efficiency of the material for low molecular weight pollutants.
Methylene blue value: characterizes the degree of development of the mesoporous structure of activated carbon, which directly affects the adsorption effect of dyes and macromolecular organic matter.
CTC adsorption value: evaluates the removal performance of volatile organic compounds.
Physical and mechanical properties: including hardness and specific surface area, to ensure the durability and total adsorption capacity of the material during backwashing.
Deep purification of drinking water: remove residual chlorine, trihalomethanes and odor substances, and significantly improve water quality.
Industrial wastewater treatment: For wastewater from chemical industry, electroplating, etc., the biochemical oxygen demand is reduced by adsorbing toxic substances.
Special pollutant control: Coal-based granular activated carbon shows excellent performance in intercepting antibiotic residues and microplastics in pharmaceutical wastewater.
Relationship between pore structure and adsorption kinetics: Micropores dominate the removal of small molecular weight pollutants, while mesopores have higher adsorption efficiency for macromolecular organic matter.
Influence of surface chemical properties: Oxygen-containing functional groups enhance the complexing ability of heavy metal ions, and ash control is suitable for high-purity water preparation.
Engineering optimization of particle size selection: coal-based granular activated carbon of different particle sizes is suitable for different process requirements, balancing adsorption efficiency and energy consumption.
With the strengthening of environmental protection regulations, coal-based granular activated carbon is moving towards functional modification. Technologies such as iron modification and ozone catalysis have improved the adsorption capacity and degradation efficiency of coal-based granular activated carbon. According to Global Market Insights, the market size of coal-based granular activated carbon in the field of water treatment will continue to expand, with a compound annual growth rate of 6.8%.
Summary: Coal-based granular activated carbon, as a "molecular catcher" in the field of water treatment, has achieved a leap from micro-pollutant interception to complex water purification by precisely regulating its technical indicators. With the cross-innovation of materials science and environmental engineering, coal-based granular activated carbon will surely play a more core role in the future sustainable water cycle system. Its high efficiency and economic characteristics have made it the focus of industry attention, and it is expected to continue to lead the development direction of water treatment technology in the future.
