Selection of suitable adsorbent for the removal of Cr(VI) by using objective based multiple attribute decision making...

Area of Science:

• Environmental Science
• Chemical Engineering
• Materials Science

Background:

• Hexavalent chromium (Cr(VI)) poses significant environmental and health risks.
• Selecting the optimal adsorbent for Cr(VI) removal is complex due to numerous factors and material options.
• A systematic approach is needed for efficient and rational adsorbent selection.

Purpose of the Study:

• To develop a systematic and simplified expert system for selecting adsorbents to treat Cr(VI).
• To utilize fuzzy logic and Multiple Attribute Decision Making (MADM) for adsorbent selection.
• To provide a rational framework for choosing among various Cr(VI) removal materials.

Main Methods:

• Fuzzy logic was employed to facilitate the selection of appropriate adsorbents.
• Multiple Attribute Decision Making (MADM) was used to determine relative weighting values for sorbents.
• A preference index was calculated using subjective and objective weights, with normalized parameter values based on their impact on Cr(VI) removal and uptake capacity.

Main Results:

• The study successfully applied fuzzy logic and MADM to evaluate and rank adsorbents for Cr(VI) removal.
• Relative weighting values and preference indices were calculated, providing a quantitative basis for selection.
• The normalized values highlighted the influence of different parameters on adsorbent performance.

Conclusions:

• The developed expert system offers a simplified and organized method for selecting Cr(VI) adsorbents.
• The fuzzy logic and MADM approach provides a rational basis for decision-making in water treatment.
• The study lays the groundwork for further enhancements to the adsorbent selection system.