earticle

영어

Wastes sludges containing heavy metals are hazardous to the environment and is dependent on waste disposal treatment including incineration, consignment to landfill and marine disposal. When wastes are consigned to landfill, problems arise often as a result of long-term release of toxic constituents into the surrounding environment. Portland cement (PCC) is a popular treatment agent for solidification due to its low cost, applicability to waste products and the relative ease of implementation. Nowadays, waste sulfur obtained as a by-product of oil refining, etc. is effectively utilized for implementation in different compositions of concrete which are used for diverse applications. Sulfur concrete (SC) is a thermoplastic composite made of aggregate and filler, with sulfur as a binder (instead of cement and water). For this reason, SC is a relatively new building material that can possibly replace conventional concrete made with PCC as a binder in many branches of construction. Therefore, we suggested that SC based solidification is produced by a simple treatment, where aggregate and heavy metal sludge are mixed with sulfur. We investigated the strength property of SC, which made of implementing in different compositions of filler used heavy metal sludge and analyzed mass changes and leaching test, as well as PCC in the solutions of HCl, H2SO4, and NaCl. The SC implementation with the heavy metal sludge was satisfied with mechanical strength and good resistance to aggressive conditions of acid and salt compared to PCC. Therefore, SC produced by a simple treatment, where aggregate and heavy metal sludge are mixed with sulfur can be used with a relatively new building material for minimizing wastes.