Mechanism of stabilized/solidified heavy metal contaminated soils with cement-fly ash based on electrical resistivity measurements

Measurement ◽  
2019 ◽  
Vol 141 ◽  
pp. 85-94 ◽  
Author(s):  
Jingjing Liu ◽  
Fusheng Zha ◽  
Long Xu ◽  
Bo Kang ◽  
Xiaohui Tan ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Electrical Resistivity ◽  
Fly Ash ◽  
Contaminated Soils ◽  
Resistivity Measurements

Effect of w/cm and Composition on Correlations of Concrete Electrical Resistivity and Chloride Migration Coefficients

2016 ◽  
Vol 711 ◽  
pp. 21-28
Author(s):  
Francisco J. Presuel-Moreno
Keyword(s):  
Electrical Resistivity ◽  
Steady State ◽  
Fly Ash ◽  
Laboratory Experiments ◽  
Chloride Ion ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Ion Migration ◽  
Resistivity Measurements ◽  
Chloride Migration

The performance with regard to chloride penetration of specimens made with three base compositions (supplementary cementitious materials: 20% fly ash, 20% fly ash + 8% silica fume, and 50% slag replacement by weight of cement), and water-to-cementitious ratios of 0.35, 0.41, or 0.47 were investigated here. In this investigation, laboratory experiments were carried out to study the correlation between electrical resistivity and non-steady state chloride ion migration coefficients (Dnssm) of concrete. NT Build 492 was used to determine chloride migration coefficients. Rapid migration tests and resistivity measurements were performed several times over two years, and the non-steady state migration coefficient (Dnssm) vs. resistivity values were correlated. Experimental results show that a good correlation was found between electrical resistivity and Dnssm. Based on the relationships developed from this investigation, it appears that the correlations are age and composition dependent.

Assessment of strength and leaching characteristics of heavy metal–contaminated soils solidified/stabilized by cement/fly ash

2019 ◽  
Vol 26 (29) ◽  
pp. 30206-30219 ◽  
Author(s):  
Fusheng Zha ◽  
Chunjie Ji ◽  
Long Xu ◽  
Bo Kang ◽  
Chengbin Yang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Contaminated Soils ◽  
Leaching Characteristics

Evaluation of the Effects of Environmental Materials on Pb and Cd Immobilization

2013 ◽  
Vol 634-638 ◽  
pp. 229-238
Author(s):  
Zhan Bin Huang ◽  
Xiao Qing Zhang ◽  
Li Cheng Peng ◽  
Chen Shen ◽  
Zhen Huang
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Humic Acid ◽  
Soil Ph ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Environmental Materials

Environment materials (humic acid (HA), super absorbent polymers (SAP), fly ash (FM) and zeolite (FS)) were used as amendments to immobilize heavy metal Pb and Cd in artificial contaminated soils. The results showed that soil pH and EC changed after the application of single or combined and co-application amendments. The leaching Pb in the single-Pb contaminated soils amended with HA, FM, C1 (HA, SAP, FM, FS) and C2 (HA, SAP, FM) were 93%, 87%, 59% and 77% of the control without amendments, respectively. The leaching Cd in the single-Cd contaminated soils amended with SAP and C3 (HA, SAP, FS) were 64%, and 83% of the control, respectively, in four-steps leaching. The leaching Pb in the Pb-Cd co-contaminated soil amended with HA, C2 and C3 were 41%, 95% and 77% of the control, respectively. The leaching Cd in the Pb-Cd co-contaminated soil amended with HA, SAP and C3 were 85%, 72% and 55% of the control, respectively. The results indicated that C1 and SAP was the best amendments for single Pb and Cd contaminated soil, respectively. While the combined amendment, HA and C3 could prevent Pb and Cd to be leached from co-contaminated soils, respectively.

Possibility of using modified fly ash and organic fertilizers for remediation of heavy-metal-contaminated soils

2021 ◽  
Vol 284 ◽  
pp. 124713
Author(s):  
Xiongfei Hu ◽  
Xunrong Huang ◽  
Hanghang Zhao ◽  
Fuhao Liu ◽  
Lu Wang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Contaminated Soils ◽  
Organic Fertilizers ◽  
Modified Fly Ash

scholarly journals Utilization of fly ash for stabilization/solidification of heavy metal contaminated soils

2003 ◽  
Vol 70 (3-4) ◽  
pp. 377-394 ◽  
Author(s):  
Dimitris Dermatas ◽  
Xiaoguang Meng
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Contaminated Soils

Heavy metal bioaccumulation by selected plants from fly ash–contaminated soils in suburban area

2021 ◽  
Vol 14 (2) ◽  
Author(s):  
Sami Ullah Qadir ◽  
Vaseem Raja ◽  
Weqar Ahmad Siddiqi ◽  
Mohammed Nasser Alyemeni ◽  
Leonard Wijaya ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Contaminated Soils ◽  
Suburban Area ◽  
Metal Bioaccumulation ◽  
Heavy Metal Bioaccumulation

In-situ electrical-resistivity measurements in the high-voltage electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 68-69
Author(s):  
W. E. King
Keyword(s):  
Electrical Resistivity ◽  
Electron Microscope ◽  
High Voltage ◽  
Resistivity Measurements ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
High Voltage Electron ◽  
Wide Range ◽  
Helium Gas

A side-entry type, helium-temperature specimen stage that has the capability of in-situ electrical-resistivity measurements has been designed and developed for use in the AEI-EM7 1200-kV electron microscope at Argonne National Laboratory. The electrical-resistivity measurements complement the high-voltage electron microscope (HVEM) to yield a unique opportunity to investigate defect production in metals by electron irradiation over a wide range of defect concentrations.A flow cryostat that uses helium gas as a coolant is employed to attain and maintain any specified temperature between 10 and 300 K. The helium gas coolant eliminates the vibrations that arise from boiling liquid helium and the temperature instabilities due to alternating heat-transfer mechanisms in the two-phase temperature regime (4.215 K). Figure 1 shows a schematic view of the liquid/gaseous helium transfer system. A liquid-gas mixture can be used for fast cooldown. The cold tip of the transfer tube is inserted coincident with the tilt axis of the specimen stage, and the end of the coolant flow tube is positioned without contact within the heat exchanger of the copper specimen block (Fig. 2).

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