Environmental and Technological Implications
This study demonstrates the feasibility of transforming heavy metals into stable forms in ceramsite and the successful reduction of heavy metals mobility after heat treatment. The results show that the stability of heavy metals in ceramsite cannot be easily released into the environment again to cause secondary pollution and that this new technology for production of ceramsite can utilize sludge with different components by adjusting the oxide contents. The results are helpful to understand the leaching behaviors of heavy metals influenced by SiO2:Al2O3, acidic oxides (SiO2 and Al2O3), Fe2O3:CaO:MgO, and basic oxides (Fe2O3, CaO, and MgO) and to make a comprehensive judgment of the environmental impact of ceramsite during its service life or any secondary service life. It is concluded that WWTS and DWTS can be converted to harmless ceramsite and solve the problem of sludge disposal, in accordance with the concept of sustainable development.
Environmental and Technological ImplicationsThis study demonstrates the feasibility of transforming heavy metals into stable forms in ceramsite and the successful reduction of heavy metals mobility after heat treatment. The results show that the stability of heavy metals in ceramsite cannot be easily released into the environment again to cause secondary pollution and that this new technology for production of ceramsite can utilize sludge with different components by adjusting the oxide contents. The results are helpful to understand the leaching behaviors of heavy metals influenced by SiO2:Al2O3, acidic oxides (SiO2 and Al2O3), Fe2O3:CaO:MgO, and basic oxides (Fe2O3, CaO, and MgO) and to make a comprehensive judgment of the environmental impact of ceramsite during its service life or any secondary service life. It is concluded that WWTS and DWTS can be converted to harmless ceramsite and solve the problem of sludge disposal, in accordance with the concept of sustainable development.
การแปล กรุณารอสักครู่..