Adsorption performance and mechanism of activated coke on polymorphic phosphorus pollutants in water

ZHANG Yanyu; WANG Jiaqi; ZHANG Chi; MIAO Shiyu; CHEN Yasong; AN Xiaoqiang; LAN Huachun

doi:10.13205/j.hjgc.202505002

Volume 43 Issue 5

May 2025

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ZHANG Yanyu, WANG Jiaqi, ZHANG Chi, MIAO Shiyu, CHEN Yasong, AN Xiaoqiang, LAN Huachun. Adsorption performance and mechanism of activated coke on polymorphic phosphorus pollutants in water[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 11-19. doi: 10.13205/j.hjgc.202505002

Citation:

ZHANG Yanyu, WANG Jiaqi, ZHANG Chi, MIAO Shiyu, CHEN Yasong, AN Xiaoqiang, LAN Huachun. Adsorption performance and mechanism of activated coke on polymorphic phosphorus pollutants in water[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 11-19. doi: 10.13205/j.hjgc.202505002

Citation:

ZHANG Yanyu, WANG Jiaqi, ZHANG Chi, MIAO Shiyu, CHEN Yasong, AN Xiaoqiang, LAN Huachun. Adsorption performance and mechanism of activated coke on polymorphic phosphorus pollutants in water[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 11-19. doi: 10.13205/j.hjgc.202505002

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Adsorption performance and mechanism of activated coke on polymorphic phosphorus pollutants in water

doi: 10.13205/j.hjgc.202505002

1. Center for Water and Ecology, School of Environment, Tsinghua University, Beijing 100084, China;
2. Yangtze River Eco-Environmental Engineering Research Center, China Three Gorges Corporation, Wuhan 430010, China;
3. National Engineering Research Center for Eco-environment Protection of Yangtze River Economic Belt, Wuhan 430010, China

Received Date: 2024-09-09
Accepted Date: 2024-12-19
Rev Recd Date: 2024-12-12

Available Online: 2025-09-11

Abstract

Abstract

In order to achieve efficient removal of polymorphic phosphorus pollutants in wastewater， this study took activated coke， a carbon-based adsorbent which is cheap， easy to obtain， and has high mechanical strength and rich active sites， as the research object. Corresponding adsorption efficiency and mechanism for polymorphic phosphorus pollutants was evaluated through static adsorption experiments. The characterization of the microscopic morphology and surface characteristics of activated coke showed that the layered structure composed of carbon atoms is disorderly arranged and stacked. The specific surface area of activated coke was 675 m²/g and the internal pore structure was mainly micropores. Dimethoate （>90%） and trichlorfon （>70%） could be efficiently removed by adsorption while the removal efficiency of phosphite （<20%） and hypophosphite （<10%） was low. The results of the kinetic analysis showed that the adsorption of phosphorus pollutants by activated coke mainly followed the quasi-second-order kinetic model （R²>0.98）. In terms of adsorption isotherm， the adsorption process of activated coke on organic phosphorus pollutants was mostly single-layer adsorption. In contrast， the adsorption of inorganic phosphorus pollutants was multi-layer adsorption. The adsorption mechanism of activated coke was evaluated using glyphosate as a model pollutant， and it was confirmed that the adsorption process was dominated by chemical effects. The adsorption efficiency will be affected by solution pH， which decreased from 48% to 8% while increasing pH from 2.00 to 4.00. The above research provides a reference for the application of activated coke in the efficient treatment of phosphorus-containing wastewater.
- activated coke,
- phosphorus-containing pollutants,
- adsorption,
- kinetics,
- mechanism

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References(21)

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