Improvement of ground granulated blast furnace slag on stabilization/solidification of simulated mercury-doped wastes in chemically bonded phosphate ceramics

Liu, Zhongzhe; Qian, Guangren; Zhou, Jizhi; Li, Chuanhua; Xu, Yunfeng; Qin, Zhe

doi:10.1016/j.jhazmat.2007.12.110

Cited by 44 publications

(12 citation statements)

References 9 publications

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“…The result showed that the Portland cement (PC) solidification of TFZ stabilized surrogates containing 1000 mg Hg/kg can successfully pass the toxicity characteristic leaching procedure leaching test. Liu et al [24] used ground granulated blast-furnace slag, and Chen et al [25] used PC and blended cements containing pulverized fuel ash to solidify/stabilize an electroplating sludge. After analysis of the status and development of stabilization technology in treating heavy metal hazardous, Jiang et al [26,27] highlighted that heavy metal chelating agent will play an important role in traditional stabilization/solidification of heavy metal-containing waste.…”

Section: Metal Recovery and Appropriate Disposal Of The Resultant Wastesmentioning

confidence: 99%

The current status of heavy metal pollution and treatment technology development in China

Wang

Chen

2015

Environmental Technology Reviews

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Heavy metal pollution has become a serious environmental problem and received increasing attention in recent years in China. In this paper, the current status of heavy metal pollution is analysed; the major heavy metal pollutants include Hg, Cd, Cr(VI), Pb and As. Non-ferrous metal industries, including mining and smelting, discharge about 67.8% of the total amounts of these five metals. Electroplating wastewater mainly from metal products manufacture and the printed circuit board industry also contributed to serious heavy metal pollution. For the discharge amount of Hg, Cd, Cr(VI), Pb and As, Chinese western and central area accounted for about 87%. Heavy metal-containing wastewater varied greatly quantitatively and qualitatively. Different treatment technologies for heavy metal removal from wastewater are introduced, evaluated and compared, including ion exchange, adsorption, solvent extraction, evaporation, air flotation, chemical precipitation, chemical oxidation and reduction, electrolyzation, biological flocculation, biosorption, membrane separation and nanotechnology. It is difficult to treat such complex wastewater using any single treatment method alone to meet the discharge standard. Integrated treatment processes should be applied. To alleviate and eliminate heavy metal pollution in China, comprehensive consideration should be taken to improve wastewater reuse, heavy metal recovery and the suitable disposal of the resulted residual wastes containing heavy metals. Multidisciplinary collaboration is required to develop innovative technologies for heavy metal wastewater treatment.

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Section: Metal Recovery and Appropriate Disposal Of The Resultant Wastesmentioning

confidence: 99%

The current status of heavy metal pollution and treatment technology development in China

Wang

Chen

2015

Environmental Technology Reviews

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“…It was hypothesised that any free Al in the binder could preferentially form a second phosphate phase, within the struvite-K matrix. GBFS dissolution and subsequent reaction to form a secondary phase would explain the enhanced strength development of the binder [11] as a result of filling pores in the matrix. The "area of interest" in Fig.…”

Section: Elemental Mapping -Gbfs/mkpcmentioning

confidence: 99%

“…The inclusion of FA in MKPC enhances the workability of the binder via the "ball-bearing effect" of the spherical particles [6,[9][10][11]. Several studies [6,12,13] based on FA/MKPC blended binders have suggested that FA simply acts as a diluent or inert filler, that modifies the aesthetics of MKPC to be compatible to traditional Portland cement, which has been deemed important for rapid-repair applications [9].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of magnesium potassium phosphate cements blended with fly ash and ground granulated blast furnace slag

Gardner

Bernal

Walling

et al. 2015

Cement and Concrete Research

272

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Magnesium potassium phosphate cements (MKPCs), blended with 50 wt.% fly ash (FA) or ground granulated blast furnace slag (GBFS) to reduce heat evolution, water demand and cost, were assessed using compressive strength, X-ray diffraction (XRD), scanning electron microscopy (SEM) and nuclear magnetic resonance (NMR) spectroscopy on 25 Mg, 27 Al, 29 Si, 31 P and 39 K nuclei. We present the first definitive evidence that dissolution of the glassy aluminosilicate phases of both FA and GBFS occurred under the pH conditions of MKPC. In addition to the main binder phase, struvite-K, an amorphous orthophosphate phase was detected in FA/MKPC and GBFS/MKPC systems. It was postulated that an aluminium phosphate phase was formed, however, no significant Al-O-P interactions were identified. High-field NMR analysis of the GBFS/MKPC system indicated the potential formation of a potassium-aluminosilicate phase. This study demonstrates the need for further research on these binders, as both FA and GBFS are generally regarded as inert fillers within MKPC.

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“…Other authors used magnesium potassium phosphate cements with K 2 S for the stabilization of wastes with a Hg 2+ content between 281.8 mg dm −3 and 572.7 mg dm −3 . Leachate concentrations after the TCLP test ranged between 1.6 mg dm −3 and 16.12 mg dm −3 [14].…”

Section: Introductionmentioning

confidence: 99%

Leaching behaviour of magnesium phosphate cements containing high quantities of heavy metals

Buj

Torras

Rovira

et al. 2010

Journal of Hazardous Materials

164

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Improvement of ground granulated blast furnace slag on stabilization/solidification of simulated mercury-doped wastes in chemically bonded phosphate ceramics

Cited by 44 publications

References 9 publications

The current status of heavy metal pollution and treatment technology development in China

The current status of heavy metal pollution and treatment technology development in China

Characterisation of magnesium potassium phosphate cements blended with fly ash and ground granulated blast furnace slag

Leaching behaviour of magnesium phosphate cements containing high quantities of heavy metals

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