Accessible Requires Authentication Published by De Gruyter April 5, 2013

Influence of Heat Treatment on the Performance of Polymers as Gypsum (CaSO4 · 2H2O) Scale Inhibitors for Industrial Water Applications

Einfluss der Wärmebehandlung auf die Wirksamkeit von Polymeren als Inhibitor von Gips (CaSO4 · 2H2O)- und Kalkablagerungen in Industriewässern
Zahid Amjad

Abstract

The inhibition of gypsum precipitation by homo-, co-, and terpolymers has been examined in aqueous solution. It has been found that polymer performance as gypsum inhibitor depends upon polymer composition, type of comonomer, and functional groups. Results on the evaluation of polymers suggest that compared to co- and terpolymers, homopolymers containing carboxyl group are effective gypsum inhibitors. The impact of heat treatment (150°C to 240°C) on the performance of various homo-, co-, and teropolymers as gypsum inhibitors has also been investigated. It has been observed that all polymers lose performance to a varying degree when exposed to thermal treatment. Performance data on co- and terpolymers containing amido group show improved performance after heat treatment suggesting the formation of carboxyl group. Scanning electron microscopic investigations of gypsum crystals grown in the presence of polymers show that structures of these crystals are highly modified.

Kurzfassung

Es wurde die Hemmung von Gipsausfällungen durch Homo-, Co- und Terpolymere untersucht. Es wurde gefunden, dass die Wirksamkeit der Polymere als Inhibitor von der Polymerzusammensetzung, dem Comonomertyp und den funktionellen Gruppen abhängig ist. Die Bewertung der Polymere aufgrund der Ergebnisse zeigt, dass Homopolymere, die eine Carboxylgruppe enthalten, im Vergleich zu den Co- und Terpolymeren effektive Gipsinhibitoren sind. Der Einfluss einer Wärmebehandlung (150°C to 240°C) auf die Wirksamkeit der verschiedenen Homo-, Co- und Terpolymeren als Gipsinhibitor wurde untersucht. Man konnte feststellen, dass die Wirksamkeit aller Polymere nach einer thermischen Behandlung in unterschiedlichem Grad nach einer thermischen Behandlung verringert war. Co- und Terpolymere, die eine Amidogruppe besitzen, zeigen eine verbesserte Leistung nach der Wärmebehandlung, was auf die Bildung einer Carboxylgruppe hinweist. Rasterelektronenmikroskopische Untersuchungen an Gipskristallen, die in Anwesenheit von Polymeren gewachsen sind, zeigen, dass ihre Kristallstrukturen stark verändert sind.


Z. Amjad, Ph.D., Walsh University, Division of Mathematics and Sciences, 2020 East Maple Street, North Canton, Ohio 44720, E-Mail:

Zahid Amjad, Ph.D., has over 30 years experience in the water treatment, membrane processes, household, personal care, and pharmaceutical fields. He has published over 150 technical papers and is holder of 30 US patents. Dr. Amjad has edited six books and has presented papers at national and international conferences. Dr. Amjad is a member of several professional societies and is a recipient of Association of Water Technologies 2002 Ray Baum Memorial Water Technologist of the year award. His current research interests include development and applications of water soluble polymers, inhibition of mineral scale formation, and water purification. Dr. Amjad is the founder and president of Aqua Science and Technology LLC. He currently provides technical and marketing consultation to water treatment, separation processes, and related fields. Dr. Amjad is also a Visiting Professor in Chemistry at Walsh University, North Canton, Ohio.


References

1. Amjad, Z. and Zuhl, R. W.: Chapter 5 in The Science and Technology of Industrial Water Treatment, (Z.Amjad, Ed.), CRC Press (2010).10.1201/9781420071450 Search in Google Scholar

2. Wilson, D.: Influence of molecular weight on selection and application of polymeric scale inhibitors, CORROSION/94, Paper No. 94, NACE International, Houston (1994). Search in Google Scholar

3. Klepetsanis, P. G., Koutsoukos, P. G. and Amjad, Z.: Chapter 9 in Advances in Crystal Growth Inhibition Technologies, (Z.Amjad, Ed.), Kluwer Academic Publishers, New York, NY (2000). Search in Google Scholar

4. Smyk, E. E., Hoots, H. E., Fivizzani, K. F. and Fulks, K. E.: The design and application of polymers in cooling water programs, CORROSION/88, Paper No. 88014, NACE International, Houston, TX (1988). Search in Google Scholar

5. Amjad, Z.: Phosphorus and Sulfur144 (1999) 193.10.1080/10426509908546215 Search in Google Scholar

6. McGaugh, M. C. and Kottle, S.: Polym. Lett5 (1967) 817.10.1002/pol.1967.110050916 Search in Google Scholar

7. Denman, W. L. and Salutsky, M. L. Proceedings of the 28th International Water Conference, Pittsburgh, PA (1967). Search in Google Scholar

8. Masler, W. F.: Proceedings of the 43rd International Water Conference, Pittsburgh, PA, (1982). Search in Google Scholar

9. Gurkayanak, F., Tuber, Yang J., Matyas, J., Spenser, J. and Gryte, C. C.: J. Polym. Sci. A.34 (1996) 349.10.1002/(SICI)1099-0518(199602)34:3<349::AID-POLA3>3.0.CO;2-P Search in Google Scholar

10. Hetper, J., Balcerowiak, W. and Beres, J.: J. Thermal. Anal.20 (1981) 345.10.1007/BF01912883 Search in Google Scholar

11. McNeil, C. and Sadeghi, M. T.: Polym. Degrad. Stab.30 (1990) 267.10.1016/0141-3910(90)90081-H Search in Google Scholar

12. Amjad, Z. and Zuhl, R. W.: The impact of thermal stability on the performance of polymeric dispersants for boiler water systems, Paper presented at the Association of Water Technologies 2005 Annual Convention, Palm Springs, CA (2005). Search in Google Scholar

13. Amjad, Z. and Hooley, J.: J. Colloid Interface Sci.111 (1986) 496.10.1016/0021-9797(86)90052-4 Search in Google Scholar

14. Oner, M., Dogan, O. and Oner, G.: J. Crys. Growth186 (1998) 427.10.1016/S0022-0248(97)00518-6 Search in Google Scholar

15. Mahmood, M. H. H., Rashad, M. M. and Abdel, E. A.: J. Colloid Interface Sci.270 (2004) 99.10.1016/j.jcis.2003.09.023 Search in Google Scholar

16. Ahmed, S. B., Tlili, M. M. and Amor, M. B.: Crys. Res. Technol43 (2008) 935. Search in Google Scholar

17. Amjad, Z. and Zuhl, R. W.: Kinetic and Morphological Investigation on the Precipitation of Calcium Carbonate in the Presence of Inhibitors, CORROSION/2006, Paper No. 06385, NACE International, Houston, TX (2006). Search in Google Scholar

18. Demadis, K. D., Stathoulpoulou, A. and Ketsetzi, A.: Paper No. 07058, NACE International, Houston, TX (2007). Search in Google Scholar

19. Amjad, Z.: Tenside Surf. Det.43 (2006) 184. Search in Google Scholar

20. Amjad, Z.: Chapter 16 in Calcium Phosphate in Biological and Industrial Systems, (Z.Amjad, Ed.), Kluwer Academic Publisher, Boston, MA (1997). Search in Google Scholar

21. Amjad, Z. and Zuhl, R. W.: Phos. Res. Bull.13 (2002) 59. Search in Google Scholar

22. Amjad, Z.: Tenside Surf. Det.36 (1999) 50. Search in Google Scholar

23. Amjad, Z. and Zuhl, R. W.: Effect of heat treatment on the performance of deposit control polymers as calcium carbonate inhibitors, Paper No. 56, CORROSION/2007, NACE International, Houston, TX (2007). Search in Google Scholar

24. Amjad, Z.: Tenside Surf. Det.44 (2007) 2002. Search in Google Scholar

25. Amjad, Z.: Tenside Surf. Det.36 (1999) 162. Search in Google Scholar

26. Amjad, Z., Zuhl, R. W. and Zibrida, J. F.: Materials Performance36 (1997) 32. Search in Google Scholar

27. Amjad, Z.: Tenside Surf. Deter.43 (2006) 242. Search in Google Scholar

28. Sarig, S. and Kahana, F.: Crystal Growth35 (1976) 146.10.1016/0022-0248(76)90162-7 Search in Google Scholar

29. Dallas, E., Kallitsis, J. and Koutsoukos, P. G.: J. Crys. Growth89 (1988) 287.10.1016/0022-0248(88)90412-5 Search in Google Scholar

30. Amjad, Z.: Desalination and water Treatment Journal, submitted for publication (July 2012). Search in Google Scholar

Received: 2012-07-25
Revised: 2012-08-24
Published Online: 2013-04-05
Published in Print: 2012-11-01

© 2012, Carl Hanser Publisher, Munich