Preparation of non-sintered permeable bricks using electrolytic manganese residue: Environmental and NH3-N recovery benefits

Wang, Yaguang; Gao, Shuai; Liu, Xiaoming; Tang, Binwen; Mukiza, Emile; Zhang, Na

doi:10.1016/j.jhazmat.2019.120768

Cited by 91 publications

(23 citation statements)

References 30 publications

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“…The weak absorption peaks at 1643 cm −1 indicate the vibration spectrum of H-O-H. The vibration peak observed from 871 cm −1 is caused by the asymmetric stretching vibration of Si-OH and 461 cm −1 represents an absorption spectra for Si-O [ 20 ].…”

Section: Resultsmentioning

confidence: 99%

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Wang

Liu

et al. 2021

Materials

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Bayer red mud (BRM) is a kind of solid waste with high hematite content, and its effective utilization is difficult due to the special physicochemical properties. In this work, Fe2O3 in BRM was reduced to Fe3O4 by biomass, and iron concentrate and high activity tailings were obtained after magnetic separation. The pozzolanic activity and hydration characteristics of the tailings were systematically studied. The results showed that the relatively stable polymerization structures of Si-O and Al-O in BRM are destroyed under the effect of biomass reduction at 650 °C, and some fracture bonds and activation points are formed in the structures. The aluminosilicate phases in the BRM were easy to transform into the active substances of Si and Al. The pozzolanic activity of tailings is greatly improved, and its pozzolanic activity index is 91%. High polymerization degree of gel and ettringite are formed since more active substances and alkali in the tailings promote the hydration reaction of cement-based cementitious materials, which made cementitious materials have dense matrix, good mechanical properties, and environmental performance. This work has realized the full quantitative utilization of BRM and provided a feasible way for the resource utilization of BRM.

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Section: Resultsmentioning

confidence: 99%

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Wang

Liu

et al. 2021

Materials

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“…The contents of the targeted major metals such as Cu, Zn, Fe, and Mn were 2923 g/t, 1638 g/t, 108,671 g/t, and 591 g/t, respectively. The content of Na and K were lower than 0.2%, and S was mainly in the presence of sulfate; thus, the cracking risks caused by the dissolved salt and acidity will be reduced [ 18 ]. When the firing process was used, the available sulfur was easily turned to the notorious SO 2 [ 18 ]; therefore, this study planned to use curing methods to prepare building specimens.…”

Section: Resultsmentioning

confidence: 99%

“…It can be found that after curing, the main proportion of SiO 2 in the LRT was converted into more stable minerals such as CaAl 2 (SiO 3 ) 4 and Mullite. Thus, the good stability of the specimen could be obtained [ 18 , 36 ]. The solidified hydration reaction mixes the calcite with the partially crystalline gel, resulting in the coexistence of the amorphous phase and the crystalline phase of the hydrated product.…”

Section: Resultsmentioning

confidence: 99%

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Mechanical Properties and Toxicity Risks of Lead-Zinc Sulfide Tailing-Based Construction Materials

et al. 2021

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The leaching residue of the lead–zinc sulfide tailing (LRT) is the only residue generated from the tailing leaching recovery process; it is a typical hazardous material for its high heavy-metal contents and high acidity. Due to the large output of LRT, and because its main components are Ca, Si, and Al, the preparation of building construction materials with LRT was studied. The results showed that when the LRT addition is less than 47%, with the ordinary Portland cement (OPC) and fly ash (FA) added and the curing conditions appropriate, the strength values of the tested specimens meet the M15 Class of the autoclaved lime sand brick standard (GB/T 16753-1997). The carbonization coefficient and drying shrinkage of the specimen were 0.79 and smaller than 0.42, respectively. As the SEM, TG, and XRD analysis have shown, the LRT can chemically react with additives to form stable minerals. The heavy metal contents that were leached out well met the limits in GB5085.3-2007. Based on the high addition of the LRT, the good strength and lower heavy metals were leached out of the prepared test specimen, and the tailing could be reused completely with the leaching recovery and the LRT reuse process. LRT can be used to replace OPC, allowing more sustainable concrete production and improved ecological properties of LRT.

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“…There are pluvial flooding and surface runoffs in many cities around the world [4][5][6][7], and this reflects the hydrological and environmental impact of urban expansion that increase the runoff rate and flow, reduce the soil water that usually supports infiltration, reduce groundwater supply and base flow, and reduce evapotranspiration [8]. using aggregates with a particle size of 3-5 mm [24], and sintered permeable bricks with small pore diameters were prepared from fine aggregates with a particle size of 0.85-2 mm [31]. The sintering process of clay permeable brick has high energy consumption and is not environmentally friendly, there will also be secondary pollution even if waste slag and waste glass are used to make bricks.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Component Optimization of Resin-Based Permeable Brick

Wang

Zhang

2020

Materials

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The present study aims to prepare resin-based permeable bricks with micron-sized pores using fine aggregate with a particle diameter of 0.08–0.6 mm and bisphenol-A epoxy resin, a polymer binder. The properties of the binder, the characteristic parameters of the aggregate, and the micro pore structure of the brick were studied in order to break through the limitations of traditional porous permeable materials. The dynamic mechanical properties of resin were analyzed by dynamic mechanical analysis (DMA). The frequency parameter of particle size of 10 kinds of aggregate from different regions were obtained by digital image processing, and the characteristic parameter (aggregate distribution coefficient α) was obtained by modified Gaussian distribution. The microstructure of porous brick was analyzed by scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS). The test results show: (1) the glass transition temperature (Tg) of the resin is 61 °C; (2) the parameters of aggregate particle group will affect the performance of porous permeable materials; (3) the minimum effective pore diameter of the permeable brick is 30 μm, the maximum permeable rate is 6.22 × 10 − 2 cm / s and the compressive strength is 41.08 MPa. The conclusions of this study will provide an important reference for permeable materials in the micron-scale pore range and the selection of binder and aggregate materials.

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Preparation of non-sintered permeable bricks using electrolytic manganese residue: Environmental and NH3-N recovery benefits

Cited by 91 publications

References 30 publications

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Mechanical Properties and Toxicity Risks of Lead-Zinc Sulfide Tailing-Based Construction Materials

Preparation and Component Optimization of Resin-Based Permeable Brick

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