scholarly journals Direct reuse of two deep-dewatered sludge cakes without a solidifying agent as landfill cover: geotechnical properties and heavy metal leaching characteristics

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3823-3830 ◽  
Author(s):  
Jiakuan Yang ◽  
Shinan Zhang ◽  
Yafei Shi ◽  
Chao Li ◽  
Wenbo Yu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Geotechnical Properties ◽  
Metal Leaching ◽  
Curing Time ◽  
Heavy Metal Leaching ◽  
Landfill Cover ◽  
Leaching Characteristics ◽  
Dewatered Sludge

The skeleton builders improve the geotechnical properties and heavy metal leaching characteristics of the dewatered sludge cakes which make them appropriate for re-use as landfill cover materials after a certain curing time.

Properties and heavy metal leaching characteristics of leachate sludge derived biochar

2021 ◽  
Author(s):  
Huiqin Zhang ◽  
Zixian Wang ◽  
Chenyu Du ◽  
Wenlong Liu ◽  
Andrea R. Gerson ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Leaching ◽  
Heavy Metal Leaching ◽  
Leaching Characteristics

Influence of speciation distribution and particle size on heavy metal leaching from MSWI fly ash

2022 ◽  
Vol 138 ◽  
pp. 318-327
Author(s):  
Davide Bernasconi ◽  
Caterina Caviglia ◽  
Enrico Destefanis ◽  
Angelo Agostino ◽  
Renato Boero ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Particle Size ◽  
Fly Ash ◽  
Metal Leaching ◽  
Mswi Fly Ash ◽  
Heavy Metal Leaching

Effects of progressive carbonation on heavy metal leaching from cement-bound waste

AIChE Journal ◽  
2006 ◽  
Vol 52 (2) ◽  
pp. 826-837 ◽  
Author(s):  
T. Van Gerven ◽  
G. Cornelis ◽  
E. Vandoren ◽  
C. Vandecasteele ◽  
A. C. Garrabrants ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Leaching ◽  
Heavy Metal Leaching

scholarly journals Stabilization of High-Organic-Content Water Treatment Sludge by Pyrolysis

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3292 ◽  
Author(s):  
Ye-Eun Lee ◽  
I-Tae Kim ◽  
Yeong-Seok Yoo
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Algal Blooms ◽  
Xrd Analysis ◽  
Organic Content ◽  
Metal Leaching ◽  
Water Treatment Sludge ◽  
Heavy Metal Leaching ◽  
Inorganic Matter ◽  
High Organic Content

Water treatment sludge from algal blooms were analyzed and compared with general water treatment sludge as the pyrolysis temperature was varied from 300 °C to 900° C. Elemental analysis showed that the water treatment sludge in the eutrophication region has ~12% carbon content, higher than that (8.75%) of general water treatment sludge. X-ray diffraction (XRD) analysis of both types of sludge showed that amorphous silica changed to quartz and weak crystalline structures like kaolinite or montmorillonite were decomposed and changed into stronger crystalline forms like albite. Fourier transform infrared spectroscopy (FT-IR) peaks of humic/fulvic acid that indicated the affinity to combine with heavy metals disappeared above 700 °C. Toxicity characteristic leaching procedure (TCLP), conducted to determine the heavy metal leaching amount of pyrolyzed water treatment sludge, showed the lowest value of 5.7 mg/kg at 500 °C when the humic acid was not decomposed. At 500 °C, the heavy metal leaching ratio to the heavy metal content of high organic content water treatment sludge and low organic content water treatment sludge were 1.87% and 3.19%, respectively, and the water treatment sludge of higher organic content was more stable. In other words, pyrolysis of water treatment sludge with high organic content at 500 °C increases the inorganic matter crystallinity and heavy metal leaching stability.

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