Pilot experimental study on pollutant emission characteristics from co-combustion of coal and spent cathode carbon block

Zhang, Jigang; Chu, Zhiwei; Liu, Weihong; Teng, Zhaocai; Han, Kuihua

doi:10.1016/j.psep.2023.03.045

Cited by 10 publications

(2 citation statements)

References 51 publications

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“…H 2 SO 4 concentration, along with other factors, is very important for cadmium and zinc leaching and has been investigated in various researches such as: 2 M H 2 SO 4 with ultrasonic cavitation and mechanical effect 23 , 1.8 M H 2 SO 4 under ultrasonic/ozone condition 24 , by using response surface methodology (RSM)–central composite design (CCD) modeling, temperature with agitation speed and liquid/solid ratio were the most effective factors on the recovery efficiency of zinc 25 , based on RSM, 94.3% of zinc was achieved under leaching optimal conditions 26 . In some researches, the S/L is the most effective parameter 14 , 27 , while in other studies, it has the opposite effect 15 .…”

Section: Introductionmentioning

confidence: 99%

“…In some researches, the S/L is the most effective parameter 14 , 27 , while in other studies, it has the opposite effect 15 . H 2 SO 4 leaching using ultrasonic power of 300 W increases the efficiency recovery of zinc and cadmium 23 , 24 . Selective leaching of zinc from the cold filter cake was done in two steps with 8 M sodium hydroxide and finally 98% of zinc was separated, but nickel and cadmium remained in the solid residue.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of atmospheric leaching parameters for cadmium and zinc recovery from low-grade waste by response surface methodology (RSM)

Kolbadinejad,

Ghaemi

2024

Sci Rep

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This study is focused on the optimization of effective parameters on Cadmium and Zinc recovery by atmospheric acid leaching of low-grade waste by response surface methodology (RSM) and using the Central Composite Design (CCD) method. The effects of parameters including time (0.5–2.5 h), temperature (40–80 °C), solid/liquid (S/L) (0.05–0.09 g/cc), particle size (174–44 mic), oxygen injection (0–1%) and pH (0.5–4.5) were statistically investigated at 5 surfaces. The sample of low-grade waste used in this study was mainly zinc factory waste. Two quadratic models for the correlation of independent parameters for the maximum recovery were proposed. The properties of waste were evaluated by X-ray diffraction (XRD) and X-ray fluorescence (XRF). Atomic absorption spectroscopy was used to determine the amount of Cadmium and Zinc in the leaching solution. The correlation coefficient (R2) for the predicted and experimental data of Cadmium and Zinc are 0.9837 and 0.9368, respectively. Time, S/L and size were the most effective parameters for the recovery efficiency of cadmium and zinc. 75.05% of Cadmium and 86.13% of Zinc were recovered in optimal conditions of leaching: S/L 0.08, pH 2.5, size 88 µm, 70 °C and 2.5 h. with air injection.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of atmospheric leaching parameters for cadmium and zinc recovery from low-grade waste by response surface methodology (RSM)

Kolbadinejad,

Ghaemi

2024

Sci Rep

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Resource utilization of emulsion evaporation modified aluminum industrial refractory waste in the preparation of composite modified asphalt

Fan,

Tu,

Muhammad

et al. 2024

J of Applied Polymer Sci

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Aluminum industrial refractory waste pose a huge risk to the environment, and hence a safe resource utilization is mandatory to build a green industrial construction industry. Herein, a thermoplastic polyester elastomers‐spent refractory material (TPEE‐SRM) modifier having a two‐layer structure of “protective layer‐functional layer” was developed. Scanning electron microscopy and surface area analysis revealed that Eps used in the protective layer formed a dense film layer (50% decrease in specific surface) with a 97.7% sequestration of fluoride. As the reaction occurred in an organic solution, fluoride posed no risk to the environment. TPEE functional layer itself melted and dissolved with asphalt under high‐temperature conditions, and hence it established a strong interfacial interaction with asphalt. This led to an increase of 99.73% in the complex modulus (G*) and 41.75% in the rutting‐resistance performance (Jnr) of the TPEE‐SRM composite modified asphalt than that of the pristine styrene‐butadiene‐styrene (SBS) modified asphalt. The performance of the TPEE‐SRM/SBS composite modified asphalt after 10 years of use was also evaluated by conducting high pressure aging simulation tests. The linear amplitude scanning test results showed a 27.1‐fold increase in Nf 5.0%. Owing to the efficient and green modification method, the newly designed TPEE‐SRM modifier poses great application prospects and feasibility for designing advanced functional modified asphalt for construction and highway industries alongside a suitable disposal aspect for SRM.

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The recycling of carbon-rich solid wastes from aluminum electrolytic cells: a review

Ma,

Qiu,

Tang

et al. 2024

Environ Chem Lett

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Pilot experimental study on pollutant emission characteristics from co-combustion of coal and spent cathode carbon block

Cited by 10 publications

References 51 publications

Optimization of atmospheric leaching parameters for cadmium and zinc recovery from low-grade waste by response surface methodology (RSM)

Optimization of atmospheric leaching parameters for cadmium and zinc recovery from low-grade waste by response surface methodology (RSM)

Resource utilization of emulsion evaporation modified aluminum industrial refractory waste in the preparation of composite modified asphalt

The recycling of carbon-rich solid wastes from aluminum electrolytic cells: a review

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