Self-cementation solidification of heavy metals in lead-zinc smelting slag through alkali-activated materials

Zhang, Pengpeng; Muhammad, Faheem; Yu, Lin; Xia, Ming; Lin, Huirong; Huang, Xianghua; Jiao, Binquan; Shiau, Yan-Chyuan; Li, Dongwei

doi:10.1016/j.conbuildmat.2020.118756

Cited by 73 publications

(33 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the leaching of As is a fact that is described in several environmental studies of flay ash or clay based geopolymers [23,[49][50][51][52], authors who introduce EAFD for their immobilization, do not monitor this element, only those associated with the steel dust (Zn, Pb, Cr, Cd) [16,17,37]. This also occurs with other authors who use geopolymers to immobilize another hazardous waste, [34,39,53,54] none of which studies the behavior of arsenic.…”

Section: Mobilization and Availability Of Metalsmentioning

confidence: 99%

Coal Fly Ash–Clay Based Geopolymer-Incorporating Electric Arc Furnace Dust (EAFD): Leaching Behavior and Geochemical Modeling

et al. 2021

View full text Add to dashboard Cite

The recent recovery processes of electric arc furnace dust (EAFD) include stabilization within materials with potential uses in the construction sector. The stabilization of EAFD by alkaline activation of different alumina-silicates, resulting in low-cost and environmentally friendly materials. The leaching standards within the different European regulations allow evaluating waste materials and products. This work aims to study the introduction of EAFD in FA–clay geopolymers, assessing the environmental and geochemical behavior in two different scenarios, disposal, and utilization. For it, the compliance equilibrium-based batch test (EN 12457-2) and pH dependence test (EN 14429) have been used. The dosages of EAFD in the geopolymeric matrix are 5% to 20% with curing temperatures of 75 °C and 225 °C. The introduction of EAFD favors the development of the flexural strength. From the environmental point of view, metals related to EAFD, such as Zn, Pb, or Cu, are retained in the matrix. While As or Se, comes mainly from clay, present a high concentration. Therefore, the role of clay should be analyzed in future research. As expected by the high iron content in the EAFD, the iron complexes on the surface of the material are responsible for immobilization of metals in this type of matrix.

show abstract

Section: Mobilization and Availability Of Metalsmentioning

confidence: 99%

Coal Fly Ash–Clay Based Geopolymer-Incorporating Electric Arc Furnace Dust (EAFD): Leaching Behavior and Geochemical Modeling

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Lead-zinc slag is a by-product of the lead and zinc production industry, generated from the ores during smelting [104,105]. It is reported that the production of 1t of lead and zinc discharges 7,100 kg and 9,600 kg slag [24], respectively. ese lead-zinc slags are generally landfilled, not only occupying large areas of arable land but also polluting the environment due to the leaching of heavy metals and the radiation of nuclides.…”

Section: Characterization Of Lead-zinc Slagmentioning

confidence: 99%

“…e chemical composition of lead-zinc slag changes depending on the ores, the fluxes, the smelting process, and the impurities in the coke and the iron. e chemical compositions of lead-zinc slag from different research papers [24,[104][105][106][107][108][109][110][111][112][113][114][115][116][117][118][119][120][121][122][123] are summarized in Table 3. It could be found in Table 3 that the major composition of lead-zinc slag is FeO x , SiO 2 , CaO, Al 2 O 3 , and ZnO.…”

Section: Characterization Of Lead-zinc Slagmentioning

confidence: 99%

“…e main solid waste generated during lead and zinc production is lead-zinc slag. According to statistics, the extraction cost per 100 tons of lead and zinc is 71 tons of lead slag and 96 tons of zinc slag [24,25]. It is estimated that the annual production of steel slag, copper slag, ferronickel slag, and lead-zinc slag each year worldwide is 200 million tons, 70 million tons, 150 million tons, and 25 million tons, respectively [17,23].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Advances in Understanding the Alkali‐Activated Metallurgical Slag

Liu

Zhang

Sun

2021

Advances in Civil Engineering

View full text Add to dashboard Cite

This paper summarized and reviewed the mechanism and macro-performance of alkali-activated metallurgical slag, including steel slag, copper slag, ferronickel slag, and lead-zinc slag. Better activated method and alkali-activator are still needed to be developed to improve the performance of the metallurgical slag with low reactivity. Besides, the chemical components’ variation of these metallurgical slags from different regions will lead to unpredictable performance, which needs further study.

show abstract

“…The best value is 1.5. In the experiment of solidifying heavy metal slag, Zhang et al (Zhang et al 2020) demonstrated the in uence of water content and alkalinity on the reaction rate and product strength, and the water content and alkalinity should be controlled within a reasonable range. It can be seen that the preparation of geopolymers is restricted by many conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on Solidification of Chromium-Containing Sludge With Alkali Slag Combined With Attapulgite

Lin¹,

Zeng²,

Zhang³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

In order to solve the harm of hazardous waste chromium-containing sludge to humans and the environment, this paper uses attapulgite to strengthen alkali slag to prepare cementitious materials to solidify/stabilize chromium-containing sludge. Single-factor and orthogonal experiments were used to optimize the preparation parameters of alkali slag cementitious materials. The compressive strength, heavy metal leaching toxicity, and microscopic characterization of chromium-containing sludge solidified body were tested to investigate the solidification effect and mechanism of chromium-containing sludge. The results show that: The best content of attapulgite is 4%. The compressive strength of the solidified body decreased with the increase of chromium sludge content, and the leaching concentration of Cr and Cu increased with the rise of chromium-sludge content. The addition of attapulgite enhanced the compressive strength. Compared with the original chromium-containing sludge, the leaching concentration of heavy metals in the solidified body is significantly reduced. The XRD and FTIR analysis showed that the solidified body might solidify/stabilize heavy metals by physical encapsulation of amorphous form and chemical immobilization. This research realizes the use of waste to treat waste and provides the possibility for the application of solidified products in construction.

show abstract

Self-cementation solidification of heavy metals in lead-zinc smelting slag through alkali-activated materials

Cited by 73 publications

References 50 publications

Coal Fly Ash–Clay Based Geopolymer-Incorporating Electric Arc Furnace Dust (EAFD): Leaching Behavior and Geochemical Modeling

Coal Fly Ash–Clay Based Geopolymer-Incorporating Electric Arc Furnace Dust (EAFD): Leaching Behavior and Geochemical Modeling

Advances in Understanding the Alkali‐Activated Metallurgical Slag

Study on Solidification of Chromium-Containing Sludge With Alkali Slag Combined With Attapulgite

Contact Info

Product

Resources

About