活性焦对水中多形态磷污染物的吸附性能及机理

张燕羽; 王佳琪; 张驰; 苗时雨; 陈亚松; 安晓强; 兰华春

doi:10.13205/j.hjgc.202505002

活性焦对水中多形态磷污染物的吸附性能及机理

doi: 10.13205/j.hjgc.202505002

张燕羽¹,
王佳琪^2,3,
张驰^2,3,
苗时雨¹,
陈亚松^2,3, ,,
安晓强¹,
兰华春¹

1. 清华大学环境学院水质与水生态研究中心, 北京 100084;
2. 中国长江三峡集团有限公司长江生态环境工程研究中心, 武汉 430010;
3. 长江经济带生态环境国家工程研究中心, 武汉 430010

基金项目:

国家重点研发计划专项（2022YFC3203303）；中国长江三峡集团有限公司资助项目（202203015）

详细信息

作者简介:
张燕羽（1993—），男，助理研究员，主要研究方向为水污染控制技术和原理。zhangyanyu@mail.tsinghua.edu.cn

通讯作者:
陈亚松（1982—），男，正高级工程师，主要研究方向为水环境治理技术研究和应用。chen_yasong@ctg.com.cn

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出版历程
- 收稿日期: 2024-09-09
- 录用日期: 2024-12-19
- 修回日期: 2024-12-12
- 网络出版日期: 2025-09-11

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

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

摘要

摘要: 为实现废水中多形态磷污染物的高效去除，以价廉易得、机械强度高、活性位点丰富的碳基吸附剂活性焦为研究对象，通过静态吸附实验评估其对于多形态磷污染物的吸附效能及吸附机理。对活性焦微观形貌和表面特性的表征表明，活性焦由碳原子组成的层状结构无序排列、相互堆叠形成，比表面积为675 m²/g，内部孔隙结构以微孔为主。在设定研究条件下，活性焦可有效去除水中乐果（>90%）及敌百虫（>70%），但对亚磷酸盐（<20%）及次磷酸盐（<10%）的吸附性能较差。动力学分析结果表明，活性焦对磷系污染物的吸附主要遵循准二级动力学模型（R²>0.98）。吸附等温线分析结果表明，活性焦对有机磷污染物的吸附过程大多为单层吸附，而对无机磷污染物的吸附则为多层吸附。以草甘膦为模型污染物，评估了活性焦的吸附机理，证实其吸附过程由化学作用主导，且吸附效能受pH影响较大。当pH由2.00提高至12.00时，活性焦吸附率从48%降低至8%。该研究可为活性焦应用于含磷废水的高效处置提供参考。
- 活性焦 /
- 含磷污染物 /
- 吸附 /
- 动力学 /
- 机理
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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