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A novel polyaspartic acid derivative with multifunctional groups for scale inhibition application.
Ying Zhang1, Hongquan Yin1, Qingshan Zhang1
1a School of Chemical Engineering and Environment , Beijing Institute of Technology , Beijing , People's Republic of China.
Environmental Technology
|March 30, 2017
Summary
A novel polyaspartic acid derivative (PASPTU) demonstrates superior scale inhibition for calcium orthophosphate and calcium sulfate, achieving 100% efficiency. This biodegradable antiscalant offers enhanced performance in water treatment applications.
Area of Science:
- Water Treatment Chemistry
- Polymer Science
- Materials Science
Background:
- Polyaspartic acid is a green, biodegradable antiscalant used in water treatment.
- Its effectiveness is limited, particularly against calcium orthophosphate scale formation.
Purpose of the Study:
- To develop a novel polyaspartic acid derivative with enhanced scale inhibition properties.
- To improve the efficiency of antiscalants for various calcium salts.
Main Methods:
- Synthesized a graft copolymer (PASPTU) by reacting polysuccinimide with threonine and urea.
- Characterized the copolymer using techniques like NMR, GPC, TGA, and FTIR.
- Evaluated scale inhibition performance against calcium orthophosphate, calcium sulfate, and calcium carbonate.
Main Results:
- The novel polyaspartic acid derivative (PASPTU) achieved 100% scale inhibition for calcium orthophosphate.
- 100% scale inhibition was also observed for calcium sulfate.
- 91% scale inhibition was recorded for calcium carbonate at specific dosages.
Conclusions:
- The developed PASPTU exhibits excellent scale inhibition efficiency for critical calcium salts.
- This multifunctional graft copolymer represents a significant advancement for water treatment applications.