Recycling of Industrial Wastewater by its Immobilization in Geopolymer Cement
In this work, wastewater from Teva Pharmaceutical Industries Ltd., which comprises several organic and inorganic compounds, was solidified in a geopolymer matrix. The addition of wastewater to the polymerization mixture of fly ash based geopolymers yielded a high compressive strength of 50-75 MPa that is similar to that of wastewater-free geopolymer. The leaching of organic compounds from the matrix was examined and it was found to be negligible, about 0.2%wt, and comparable to the amount that leached from a geopolymer matrix made without wastewater. The results indicate that the immersion temperature and the time of immersion have negligible influences on carbon leaching.
Pietro VINCENZINI and Cristina LEONELLI
D. Tavor et al., "Recycling of Industrial Wastewater by its Immobilization in Geopolymer Cement", Advances in Science and Technology, Vol. 69, pp. 180-185, 2010