EXPERIMENTAL STUDY ON Cr REMOVAL FROM SIMULATED WASTEWATER BY CAGE CORE BLACK CARBON BEADS

LIU Xiu; LIU Li-heng; LIU Rui; HUANG Lin; LIN Hua; WEI Zhong-hua; WANG Dun-qiu

doi:10.13205/j.hjgc.202103011

Volume 39 Issue 3

Jul. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(3): 75-81

LIU Xiu, LIU Li-heng, LIU Rui, HUANG Lin, LIN Hua, WEI Zhong-hua, WANG Dun-qiu. EXPERIMENTAL STUDY ON Cr REMOVAL FROM SIMULATED WASTEWATER BY CAGE CORE BLACK CARBON BEADS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 75-81. doi: 10.13205/j.hjgc.202103011

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LIU Xiu, LIU Li-heng, LIU Rui, HUANG Lin, LIN Hua, WEI Zhong-hua, WANG Dun-qiu. EXPERIMENTAL STUDY ON Cr REMOVAL FROM SIMULATED WASTEWATER BY CAGE CORE BLACK CARBON BEADS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 75-81. doi: 10.13205/j.hjgc.202103011

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EXPERIMENTAL STUDY ON Cr REMOVAL FROM SIMULATED WASTEWATER BY CAGE CORE BLACK CARBON BEADS

doi: 10.13205/j.hjgc.202103011

1. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;
2. Guilin Xinzhu Natural Biomaterial Co., Ltd, Guilin 541000, China

Received Date: 2020-01-03
Available Online: 2021-07-19

Abstract

Abstract

The cage core black carbon beads were used to remove Cr in aqueous solution. The effects of initial pH and Cr concentration, adsorption time and temperature and adsorbent dosage on Cr removal were discussed, while the isotherm, kinetics and thermodynamics of Cr removal process were also studied. The results showed that lower initial pH, higher adsorption temperature and adsorbent dosage, and longer adsorption time were conducive to Cr removal. The Cr removal process was better described by D-R model and pseudo-second order kinetic model. The saturated adsorption capacity of bamboo based biochar for Cr was 30.62 mg/g. The controlling-step of this process was combination of liquid film diffusion and intraparticle diffusion, while the liquid film diffusion was the dominant course. The Cr removal by cage core black carbon beads made from bamboo was a spontaneous and endothermic chemisorption process.
- Cr,
- cage core black carbon beads,
- adsorption,
- kinetics,
- thermodynamics

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References(45)

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