Study on the migration and transformation of arsenic and antimony in the rhizosphere of plants grown in zinc smelting slag

2021 ◽  
pp. 1-16
Author(s):  
Hang Sun ◽  
Xinlong Li ◽  
Yonggui Wu
Keyword(s):  
Zinc Smelting ◽  
Smelting Slag ◽  
Zinc Smelting Slag

Recovery of cobalt and zinc from the leaching solution of zinc smelting slag

2019 ◽  
Vol 7 (1) ◽  
pp. 102777 ◽  
Author(s):  
Shaole Song ◽  
Wei Sun ◽  
Li Wang ◽  
Runqing Liu ◽  
Haisheng Han ◽  
...  
Keyword(s):  
Zinc Smelting ◽  
Leaching Solution ◽  
Smelting Slag ◽  
Zinc Smelting Slag

The recovery of Zn and Pb and the manufacture of lightweight bricks from zinc smelting slag and clay

2014 ◽  
Vol 271 ◽  
pp. 220-227 ◽  
Author(s):  
Huiping Hu ◽  
Qiufeng Deng ◽  
Chao Li ◽  
Yue Xie ◽  
Zeqin Dong ◽  
...  
Keyword(s):  
Zinc Smelting ◽  
Smelting Slag ◽  
Zinc Smelting Slag

scholarly journals The Solidification of Lead-Zinc Smelting Slag through Bentonite Supported Alkali-Activated Slag Cementitious Material

2019 ◽  
Vol 16 (7) ◽  
pp. 1121 ◽  
Author(s):  
Yanhong Mao ◽  
Faheem Muhammad ◽  
Lin Yu ◽  
Ming Xia ◽  
Xiao Huang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Water Glass ◽  
Cementitious Material ◽  
Curing Temperature ◽  
Solid Ratio ◽  
Zinc Smelting ◽  
Lead Zinc ◽  
Smelting Slag ◽  
Alkali Activated ◽  
Zinc Smelting Slag

The proper disposal of Lead-Zinc Smelting Slag (LZSS) having toxic metals is a great challenge for a sustainable environment. In the present study, this challenge was overcome by its solidification/stabilization through alkali-activated cementitious material i.e., Blast Furnace Slag (BFS). The different parameters (water glass modulus, liquid-solid ratio and curing temperature) regarding strength development were optimized through single factor and orthogonal experiments. The LZSS was solidified in samples that had the highest compressive strength (after factor optimization) synthesized with (AASB) and without (AAS) bentonite as an adsorbent material. The results indicated that the highest compressive strength (AAS = 92.89MPa and AASB = 94.57MPa) was observed in samples which were prepared by using a water glass modulus of 1.4, liquid-solid ratio of 0.26 and a curing temperature of 25 °C. The leaching concentrations of Pb and Zn in both methods (sulfuric and nitric acid, and TCLP) had not exceeded the toxicity limits up to 70% addition of LZSS due to a higher compressive strength (>60 MPa) of AAS and AASB samples. While, leaching concentrations in AASB samples were lower than AAS. Conclusively, it was found that the solidification effect depends upon the composition of binder material, type of leaching extractant, nature and concentration of heavy metals in waste. The XRD, FTIR and SEM analyses confirmed that the solidification mechanism was carried out by both physical encapsulation and chemical fixation (dissolved into a crystal structure). Additionally, bentonite as an auxiliary additive significantly improved the solidification/stabilization of LZSS in AASB by enhancing the chemical adsorption capacity of heavy metals.

scholarly journals Sodium Silicate Gel Effect on Cemented Tailing Backfill That Contains Lead-Zinc Smelting Slag at Early Ages

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Lijie Guo ◽  
Wenchen Li ◽  
Xiaocong Yang ◽  
Wenyuan Xu
Keyword(s):  
Pore Structure ◽  
Sodium Silicate ◽  
Mechanical Test ◽  
Strength Development ◽  
Gel Effect ◽  
Zinc Smelting ◽  
Lead Zinc ◽  
Smelting Slag ◽  
Cementitious Activity ◽  
Zinc Smelting Slag

This paper presents the results of an experimental study on the priming effect of sodium silicate gel (SS) on cemented tailing backfill (CTB) that contains lead-zinc smelting slag. CTB and cemented paste (CP) containing lead-zinc smelting slag samples with SS of 0 and 0.4% of the mass of the slag were prepared and cured at 20°C for 1, 3, 7, and 28 days. Mechanical test and pore structure analyses were performed on the studied CTB samples, microstructural analyses (X-ray diffraction analysis and thermal gravity analysis) were performed on the studied CP samples, whereas the electrical conductivity of CTB was monitored. The results reveal that SS has a significant positive effect on cementitious activity of binder mixed by cement and lead-zinc smelting slag. This activation leads to the acceleration of binder hydration process, the formation of more cement hydration products in the CTBs, and the refinement of their pore structure, which is favorable for the strength development of CTB.

scholarly journals The Utilization of Alkali-Activated Lead–Zinc Smelting Slag for Chromite Ore Processing Residue Solidification/Stabilization

2021 ◽  
Vol 18 (19) ◽  
pp. 9960
Author(s):  
Lin Yu ◽  
Lu Fang ◽  
Pengpeng Zhang ◽  
Shujie Zhao ◽  
Binquan Jiao ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Hazardous Waste ◽  
Chromite Ore Processing Residue ◽  
Chromite Ore ◽  
Ore Processing ◽  
Zinc Smelting ◽  
Lead Zinc ◽  
Smelting Slag ◽  
Alkali Activated ◽  
Zinc Smelting Slag

Lead–zinc smelting slag (LZSS) is regarded as a hazardous waste containing heavy metals that poses a significant threat to the environment. LZSS is rich in aluminosilicate, which has the potential to prepare alkali-activated materials and solidify hazardous waste, realizing hazardous waste cotreatment. In this study, the experiment included two parts; i.e., the preparation of alkali-activated LZSS (pure smelting slag) and chromite ore processing residue (COPR) solidification/stabilization. Single-factor and orthogonal experiments were carried out that aimed to explore the effects of various parameters (alkali solid content, water glass modulus, liquid–solid ratio, and initial curing temperature) for alkali-activated LZSS. Additionally, compressive strength and leaching toxicity were the indexes used to evaluate the performance of the solidified bodies containing COPR. As a result, the highest compressive strength of alkali-activated LZSS reached 84.49 MPa, and when 40% COPR was added, the strength decreased to 1.42 MPa. However, the leaching concentrations of Zn and Cr from all the solidified bodies were far below the critical limits (US EPA Method 1311 and China GB5085.3-2007). Heavy-metal ions in LZSS and COPR were immobilized successfully by chemical and physical means, which was detected by analyses including environmental scanning electron microscopy with energy-dispersive spectrometry, Fourier transform infrared spectrometry, and X-ray diffraction.

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