A Review on the Immobilization of Heavy Metals with Geopolymers

Geopolymers Are Attracting Great Interest from Mining and Energy Industries Alike, to Solve their Pressing Waste Disposal Problems. Geopolymers for Immobilization of Heavy Metal Consist of an Alkaline Activator and Cementing Components, such as Metakaolin, Coal Fly Ash, Slag, Etc., or a Combination of Two or More of them. its Main Hydration Product Is Aluminosilicate Gel at Room Temperature. Properly Designed Geopolymers Can Exhibit both Higher Strengths and Lower Leading than Portland Cement. the Exact Mechanism by which Heavy Metal Immobilization Occurs Is Not Fully Understood, and it Is Thought to Be Caused by Three Routes. this Paper Also Analyzes the Existing Problems in the Process on the Immobilization of Heavy Metal with Geopolymers Research, and its Development Is Prospected.