11. This produces a higher graphene concentration, but removing the surfactant requires chemical treatments . 12. Scientists also are considering more conventional chemical treatments for the water. 13. Another chemical treatment involves treating with a silicon solution or calcium silicate slag. 14. No chemical treatment is applied after the carpet has been finished. 15. Some chemical treatments have not been effective in recent years. 16. Repellents, creams and other chemical treatments have been used with varying degrees of success. 17. Again, conservation groups like the GOERT view chemical treatments as an effective last resort. 18. But she said there were new chemical treatments for golf courses that minimized contamination. 19. One chemical treatment is soaking the object in a 5 % sodium sesquicarbonate solution. 20. Second, their are very effective chemical treatments for collapsing veins.
