Polytitanium sulfate (PTS): Coagulation application and Ti species detection.
Yanxia Zhao1, Sherub Phuntsho2, Baoyu Gao3
1Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China; Key Laboratory for Special Functional Aggregated Materials of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
Journal of Environmental Sciences (China)
|March 4, 2017
Summary
Polytitanium sulfate (PTS) shows promise as an effective water purification coagulant. It offers improved floc properties and comparable or better removal efficiency than traditional titanium sulfate, with potential for TiO2 nanoparticle recovery.
Area of Science:
- Inorganic chemistry
- Environmental science
- Materials science
Background:
- Growing interest in inorganic polymerized coagulants for water treatment.
- Limited research on polytitanium coagulants for enhanced efficiency.
- Need for improved floc properties and sustainable coagulant options.
Purpose of the Study:
- Synthesize polytitanium sulfate (PTS) for water purification.
- Characterize PTS flocs and titanium species.
- Evaluate PTS coagulation efficiency and floc properties.
Main Methods:
- Synthesis of stable polytitanium sulfate (PTS) solutions.
- Standard jar tests for coagulation efficiency assessment.
- Electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) for speciation analysis.
- On-line monitoring of floc size using laser diffraction particle size analyzer.
Main Results:
- Successful synthesis of stable PTS solutions.
- ESI-TOF-MS confirmed the polymeric nature of PTS with various complexes.
- PTS demonstrated comparable or superior removal of organic matter and particulates versus Ti(SO4)2.
- Improved effluent pH closer to neutral values.
- Enhanced floc characteristics: size, growth rate, and structure.
Conclusions:
- Polytitanium sulfate (PTS) is an efficient and promising coagulant for water purification.
- PTS offers improved floc properties and coagulation performance.
- Coagulated sludge from PTS can be a source for recovering valuable TiO2 nanoparticles.
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