Akademik Veri Yönetim Sistemi
Rumeli 1ST International Scientific Research Conference On Sustainable Engineering And Technology (ISRCSET’22), İstanbul, Türkiye, 13 - 15 Mayıs 2022, ss.1-7
Urbanization and technological developments cause a continuous increase
in the amount of hazardous and non-hazardous waste. According to the waste
management hierarchy; wastes are managed by prevention, reduction, reuse,
recycling, energy recovery and disposal processes. Improper disposal of waste
poses a serious threat to human health and the environment, and also causes
pollution of air, soil and groundwater. Hazardous wastes which Especially for
toxicity, corrosiveness, flammability etc. containing are managed in accordance with the waste
management legislation of the country in which they are located. One of the
prominent methods of disposal of hazardous wastes is landfill. The
solidification/stabilization (S/S) process which is the pre-treatment before
landfill, is one of the main methods used in the treatment of hazardous wastes.
The S/S process involves the conversion of the physical and chemical properties
of wastes containing components that are forbidden to be disposed of without
pretreatment with binders. In the S/S process, harmful inorganic and/or organic
pollutants are stabilized by a matrix formed with binder material and converted
into a monolithic structure. The aim of the S/S process is to minimize the
environmental risk of pollutants in the waste to meet the landfill acceptance
criteria. Cement is a widely used binder material due to its low cost,
availability and effectiveness in stabilizing heavy metals. In this study, a
total of 4 different matrices containing different percentages of waste and
cement were prepared in order to reduce the flue gas dust generating from iron
and steel production and containing Pb heavy metal in high concentration to the
hazardous waste landfill limits. In the study, it was aimed to determine the
optimum amount of cement required to reduce the Pb concentration to the storage
limits. Leaching tests including the waste acceptance criteria specified in the
Toxicity Characteristics Leaching Procedure (TCLP) and the Regulation on
Regular Landfilling of Wastes (RRLW) Annex-2 were applied to the waste and
samples used in the study. Compressive strength test was performed on samples
with 14-day curing time and comparisons
were made according to international pressure strength limit values.