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Updated: Jun 5, 2025
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Target-oriented element activation and functional group synthesis lead to high quality modified clay for Prorocentrum
Xihua Cao1, Mingjiao Wang1, Fan Liu1
1CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, PR China.
A new single source with series modifications (SSSM) method optimizes modified clay (MC) for harmful algal bloom control. This method effectively activates aluminum in clay, forming polyhydroxyaluminum compounds for superior algal removal efficiency.
Area of Science:
- Environmental Science
- Materials Science
- Water Treatment
Background:
- Harmful algal blooms (HABs) pose significant environmental and economic challenges.
- Conventional methods for HAB control often have limitations in efficiency and environmental impact.
- Clay minerals offer a potential resource for developing novel HAB mitigation strategies.
Purpose of the Study:
- To develop and optimize a new method, single source with series modifications (SSSM), for preparing modified clay (MC) for effective harmful algal bloom control.
- To investigate the optimal preparation conditions for MC using response surface methodology.
- To elucidate the mechanisms behind the enhanced performance of MC in removing *Prorocentrum donghaiense*.
Main Methods:
- Response surface methodology was employed to determine the optimal preparation conditions for modified clay (MC).
- Material analysis was conducted to understand the structural and chemical changes in clay during the SSSM process.
- The performance of the optimized MC in removing *Prorocentrum donghaiense* was evaluated.
Main Results:
- Optimal preparation conditions were identified as: calcination temperature 750 °C, alkali neutralization pH 3.7, and clay supplementation ratio 1.3:1.
- Calcination activated aluminum in the clay lattice, generating highly active AlIV and AlV species.
- The optimized MC formed stable, large-particle-size flocs, enhancing coagulation and sedimentation of algal cells, leading to high removal efficiency.
Conclusions:
- The SSSM method provides an effective route for activating clay minerals for harmful algal bloom control.
- Targeted element activation (aluminum) and functional group shaping are key mechanisms for the high performance of MC.
- The optimized MC exhibits excellent regeneration and stability, making it a promising material for sustainable water treatment.
