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Strength development,leachability and microstructure of heavy metals from the solidified waste using synthesis rice husk ash (sRHA) and lime blended at the weight ratio of 1:1 were used as binders.The heavy metal-containing sludge was used at the level of 0 wt.%,30 wt.%,and 50 wt.% dry weight,respectively.The sample specimens with and without 1.5 wt.% of sodium silicate (SiO 2 /Na 2 O=1.0) were cured under the ambient condition and elevated temperature curing at 50°C for 24 hr.Experimental results showed that the introduction of sodium silicate solution and elevated temperature curing to sRHA-based solidified waste containing 30 wt.% of heavy metal sludge gave one day strength of 20 kg/cm 2 compared to 0.9 kg/cm2 for the control sample.XRD patterns indicated that most metal-sulfides present in the sludge were appeared in the solidified waste and SEM coupled with EDX techniques reveal these metal-sulfide particles were trapped within the lime-sRHA matrices.In addition,cumulative leaching behavior by tank test (EA NEN 7375:2004) showed that solidified waste containing up to 30 wt.% of heavy metal sludge was suitable to dispose in a secured landfill. 相似文献
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Areeprasert Chinnathan Kaharn Jeerattikul Inseemeesak Bundit Phasee Phatavee Khaobang Chanoknunt Kuhavichanun Apichaya Theerarojprateep Patcharanan Siwakosit Wichai 《Journal of Material Cycles and Waste Management》2018,20(1):302-313
Journal of Material Cycles and Waste Management - To quantitatively emphasize the importance of source separation practice, the difference on the MSW composition of the two areas in Bangkok, namely... 相似文献
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