Factors affecting heavy metal leaching from excavated rocks with natural contamination

2013 ◽  
pp. 587-592 ◽  
Author(s):  
T Inui ◽  
T Katsumi ◽  
A Takai ◽  
M Kamon
Keyword(s):  
Heavy Metal ◽  
Metal Leaching ◽  
Factors Affecting ◽  
Heavy Metal Leaching ◽  
Natural Contamination

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.

The heavy metal leaching property and cementitious material preparation by treating municipal solid waste incineration fly ash through the molten salt process

2019 ◽  
Vol 38 (1) ◽  
pp. 27-34
Author(s):  
Peng Zhao ◽  
Minghai Jing ◽  
Lei Feng ◽  
Bai Min
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Molten Salt ◽  
Waste Incineration ◽  
Cementitious Material ◽  
Metal Leaching ◽  
Municipal Solid Waste Incineration ◽  
Heavy Metal Leaching ◽  
Material Preparation ◽  
Molten Salt Process

This research investigated the heavy metal leaching property and cementitious material preparation by treating municipal solid waste incineration fly ash through the molten salt process. The results indicated that the heavy metal thermal evaporation of fly ash in the molten salt was related to molten salt composition, heat treatment temperature and atmosphere. After treatment with sodium chloride molten salts (contains 10–50 wt% calcium chloride) from 900°C to 1000°C for 2 h, the leaching concentrations of lead, cadmium, copper, zinc and other heavy metals in fly ash were decreased more than 90% and they could fully meet with the landfill standard. Moreover, after molten salt treatment, the weight fraction of fly ash was reduced by 50 wt% than the original one, and the fly ash has been changed as a kind of cementitious material, which has excellent cementitious property. The X-ray diffraction result indicated that the main crystal mineral composition of cementitious materials obtained was alite, belite, alinite and calcium sulphate.

Heavy Metal Leaching from Mine Tailings as Affected by Plants

1999 ◽  
Vol 28 (6) ◽  
pp. 1727-1732 ◽  
Author(s):  
D. Zhu ◽  
A. P. Schwab ◽  
M. K. Banks
Keyword(s):  
Heavy Metal ◽  
Mine Tailings ◽  
Metal Leaching ◽  
Heavy Metal Leaching

Multivariate analysis of heavy metal leaching from urban soils following simulated acid rain

2015 ◽  
Vol 122 ◽  
pp. 89-95 ◽  
Author(s):  
Junhui Li ◽  
Chongjian Jia ◽  
Ying Lu ◽  
Suofang Tang ◽  
Hojae Shim
Keyword(s):  
Heavy Metal ◽  
Multivariate Analysis ◽  
Acid Rain ◽  
Urban Soils ◽  
Simulated Acid Rain ◽  
Metal Leaching ◽  
Heavy Metal Leaching

The Environmental Safety Evaluation on Heavy Metal Leaching of Deteriorated Concrete under Severe Conditions

2013 ◽  
Vol 25 (5) ◽  
pp. 539-546
Author(s):  
Yun-Wang Choi ◽  
Sung-Rok Oh ◽  
Man-Seok Park ◽  
Sang-Chel Kim ◽  
Sang-Hwa Jung
Keyword(s):  
Heavy Metal ◽  
Safety Evaluation ◽  
Environmental Safety ◽  
Metal Leaching ◽  
Heavy Metal Leaching
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