Enzyme-induced carbonate precipitation utilizing synthetic Ca2+-zeolite for low ammonium

In this study, a low-ammonium enzyme-induced carbonate precipitation (LA-EICP) technique is proposed that utilizes the cation exchange capability of zeolite to remove ammonium, an environmentally harmful by-product urea hydrolysis. The LA-EICP process modified (EICP) suitable for soil stabilization, by mixing and resulting solution amounts calcium precipitated ammonium ions removed synthetic calcium-modified were analyzed through tube tests. addition, unconfined compressive strengths specimens measured compared investigate reinforcing effect LA-EICP. within specimen was also confirmed scanning electron microscope energy dispersive spectrometry analyses. results showed can precipitate same amount as conventional EICP, while removing almost all ions. LA-EICP-treated higher strength improvement than EICP-treated specimen, due combined zeolite.