ADSORPTION TREATMENT OF SIMULATIVE WASTEWATER CONTAINING CHROMIUM BY MODIFIED POROUS BLUECOKE POWDER

PING Song; YANG Rongrong; WU Lei; ZHOU Jun; LIU Changbo; SONG Yonghui; YUE Changsheng; TIAN Wei

doi:10.13205/j.hjgc.202302002

Volume 41 Issue 2

Feb. 2023

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PING Song, YANG Rongrong, WU Lei, ZHOU Jun, LIU Changbo, SONG Yonghui, YUE Changsheng, TIAN Wei. ADSORPTION TREATMENT OF SIMULATIVE WASTEWATER CONTAINING CHROMIUM BY MODIFIED POROUS BLUECOKE POWDER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 7-15. doi: 10.13205/j.hjgc.202302002

Citation:

PING Song, YANG Rongrong, WU Lei, ZHOU Jun, LIU Changbo, SONG Yonghui, YUE Changsheng, TIAN Wei. ADSORPTION TREATMENT OF SIMULATIVE WASTEWATER CONTAINING CHROMIUM BY MODIFIED POROUS BLUECOKE POWDER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 7-15. doi: 10.13205/j.hjgc.202302002

Citation:

PING Song, YANG Rongrong, WU Lei, ZHOU Jun, LIU Changbo, SONG Yonghui, YUE Changsheng, TIAN Wei. ADSORPTION TREATMENT OF SIMULATIVE WASTEWATER CONTAINING CHROMIUM BY MODIFIED POROUS BLUECOKE POWDER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 7-15. doi: 10.13205/j.hjgc.202302002

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ADSORPTION TREATMENT OF SIMULATIVE WASTEWATER CONTAINING CHROMIUM BY MODIFIED POROUS BLUECOKE POWDER

doi: 10.13205/j.hjgc.202302002

1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
3. Key Laboratory of Gold and Resources of Shaanxi Province, Xi'an 710055, China;
4. State Key Laboratory of Iron & Steel Industry Environmental Protection, Beijing 100088, China

Received Date: 2011-12-21
Available Online: 2023-05-25
Publish Date: 2023-02-01

Abstract

Abstract

Using low-value blue coke as the raw material, modified porous bluecoke (MA-BC) was prepared by acid washing and microwave activation, and an experimental study on its adsorption treatment of simulated Cr(Ⅵ)-containing wastewater was carried out. The surface morphology and structure and functional groups of the bluecoke powder before and after the modification were compared and analyzed by BET, SEM, N₂ adsorption-desorption test, and FT-IR. In the treatment of the simulated Cr(Ⅵ)-containing wastewater, the dosage of MA-BC, simulated wastewater pH, initial concentration of Cr(Ⅵ), and adsorption time were investigated respectively, and the thermodynamics and kinetics for the adsorption process of Cr(Ⅵ) were analyzed. The results showed that the specific surface area of activated bluecoke powder by acid washing and microwave heating increased to 160.69 m²/g, and the content of functional groups, -OH, C=C and -CH₃ on the surface of MA-BC significantly increased. Under the optimal process condition that the initial concentration of Cr(Ⅵ) in the simulated wastewater was 100 mg/L, pH was 2, the MA-BC dosage was 2 g, the adsorption time was 210 min, and then the removal rate of Cr(Ⅵ) could reach 89.21%. The main adsorption process belonged to the chemical adsorption, which obeyed the pseudo-second-order kinetic equation and conformed to the Langmuir adsorption isotherm model. The theoretical adsorption capacity was 6.255 mg/g, which was consistent with the equilibrium adsorption capacity of the experiment. After 5 cycles of regeneration and adsorption, the removal rate of Cr(Ⅵ) in simulated wastewater absorbed by MA-BC remained 80% above.
- modified porous bluecoke powder,
- chromium-containing wastewater,
- adsorption,
- kinetic,
- thermodynamic

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References(39)

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