**4. Conclusions**

The slag type and fluxing matter of vitrified Na silicate waste briquettes may be evaluated as aggregates in concrete or as filler in masonry products or as concrete debris use in foundations. The special vitrified waste briquettes may be evaluated in colored glass bottle production.

The phosphate-contained vitrified matters may be evaluated in the green house sands or as sand in the soil remediation of the local agricultural land. In the landfill deposition for hazardous-type wastes with weak vitrified sludges, avoiding costing of disposal asphalt or bituminous tar type binding is beneficial for inhibiting to solute contact in the waste dumping so that decaying with acidic solutions or digesting of sludge associated with environmental act is not permitted.

Basic Na silicate vitrification by 15% weight rate is sufficient for vitrification of acidic waste sludges with a filling carbon source in a weight rate of 15%. The carbon source of asphaltite slime and oak wood char decrease the digestion of heavy metals into the nitric acid solution from vitrified texture. The longer vitrification time over 30 minutes produced better strength of over 40 MPa compressive strength for 15% Na silicate added hazardous sludge and 15% carbon filler source of Şırnak asphaltite slime. *Microwave Vitrification of Hazardous Sludge by Şırnak Asphaltite Slime… DOI: http://dx.doi.org/10.5772/intechopen.101888*

Following 900 W microwave radiation at 20–22 min type microwave laboratory equipment, the strength of vitrified briquettes as the quality was tested. The strength increased from original values of 22 MPa to 10, 4 and 1% for Şırnak asphaltite slime, Şırnak shale and Sewage sludge. The sufficient microwave duration of 30 min showed a much efficient sintering method for hazardous sludge vitrification as designed.

Zn is decomposed as the original form of Zn5(OH) 2(CO3) on vitrification grain surface to Na ZnO silicate form causing higher strength evolution and dissolution process is negligible, bearing in acid-digesting medium.

Heap leaching applications for gold and copper productions in the area are used for planning the feasibility reports regarding environmental contamination showing some degree of contamination and certain collection pools and seepage area will be highly contaminated by atmospherical dry conditions. In the pH measurements made, the pH value of 5.3–6.3 in washing hazardous waste sludges finally at the last washing pound to 6.3, depending on the sulfate and heavy metal of salt sludge content, was observed.

Soil washing and chelate-decayed solvents tend to destroy the soil profile and should be performed to recover metals from heavily polluted industrial sites and in case, no other methods can be applied. *In situ* tar or asphalt barrier layers near the aquifer are a very promising technique for the soil protection and the aquifer may not be toxified even sludges with toxic heavy metals.

Microwave vitrification using sodium silicate binder at 15% weight rate with 15% carbon filler decreased heavy metal flow in seepages of 5N nitric acid solutions with complete elimination to below 1ppm levels as shown reductions in Pb and Fe at 237% performance. In vitrified dissolution, effluent had the 24 ppm Fe and 5 ppm Pb values, in which Pb reduction rates of sorption at Langmuir model with 5N nitrate washed were 0.01 ppm/min.l Pb and total Fe reduction rate 0.03 ppm/min.l, respectively.
