污泥基磁性生物炭及其对水体中铜离子的吸附性能

doi:10.12068/j.issn.1005-3026.2021.07.015

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (7): 1012-1018.DOI: 10.12068/j.issn.1005-3026.2021.07.015

污泥基磁性生物炭及其对水体中铜离子的吸附性能

赵冰，张冉，徐新阳

(东北大学资源与土木工程学院，辽宁沈阳110819)

修回日期:2020-09-28 接受日期:2020-09-28 发布日期:2021-07-16
通讯作者: 赵冰
作者简介:赵冰(1990-)，女，辽宁沈阳人，东北大学讲师，博士后研究人员；徐新阳(1965-)，男，浙江金华人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(52004056)；国家重点研发计划项目(2018YFC1901902) .

Magnetic Bio-char Derived from Sewage Sludge and Its Adsorption Ability for Cu(Ⅱ) in Aqueous System

ZHAO Bing， ZHANG Ran， XU Xin-yang

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Revised:2020-09-28 Accepted:2020-09-28 Published:2021-07-16
Contact: ZHAO Bing
About author:-
Supported by:
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摘要/Abstract

摘要： 以城市污水处理厂剩余污泥为原料，热解制备生物炭基质，经Fe²⁺/Fe³⁺改性加载纳米级铁氧化物颗粒，得到新型磁性生物炭材料(MBC)，用于水体中重金属离子吸附.利用VSM，SEM-EDS，XRD，FTIR等综合分析磁性生物炭材料的物理化学特性，结果表明:生物炭基质表面加载磁性γ-Fe₂O₃颗粒，分布均匀，其饱和磁化强度达13.53Am²/kg.磁性生物炭投加量1.25g/L、吸附时间24h、水体pH为5.0时，Cu²⁺吸附量为67.68mg/g，较生物炭基质吸附量增加60.08%.磁性生物炭吸附过程符合Langmuir吸附等温线、准二级吸附动力学模型.污泥基磁性生物炭吸附效果显著，兼具便于从水体中分离的优势，可实现“以废治废”的环保目标.

关键词: 污泥；磁性颗粒；生物炭；铜；吸附

Abstract: The novel magnetic bio-char(MBC)， which was derived from sewage sludge in municipal wastewater treatment plant after pyrolysis and Fe²⁺/Fe³⁺ modification by loading nano-sized iron oxide particles.The MBC can be used for the adsorption of heavy metal ions in aqueous system remediation. The physical/chemical characteristics of MBC were revealed by VSM， SEM-EDS， XRD， FTIR and batch adsorption experiments. The results showed that the nano-sized γ-Fe₂O₃ particles grew on the surface of bio-char uniformly， and the saturation magnetization of MBC reached 13.53Am²/kg. In adsorption experiments， when the dosage of MBC was 1.25g/L， adsorption time was 24h， pH was 5.0， the adsorption capacity was 67.68mg/g which increased by 60.08% than that of bio-char. The Langmuir isothermal and pseudo-second-order model can describe adsorption process of magnetic bio-char well. The MBC derived from sewage sludge has significant adsorption capacity， which is easy to separate from aqueous system. This disposition can recycle solid waste to pollution treatment.

Key words: sewage sludge; magnetic particle; bio-char; copper; adsorption

中图分类号:

TF131.1

赵冰，张冉，徐新阳. 污泥基磁性生物炭及其对水体中铜离子的吸附性能[J]. 东北大学学报（自然科学版）, 2021, 42(7): 1012-1018.

ZHAO Bing， ZHANG Ran， XU Xin-yang. Magnetic Bio-char Derived from Sewage Sludge and Its Adsorption Ability for Cu(Ⅱ) in Aqueous System[J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 1012-1018.

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污泥基磁性生物炭及其对水体中铜离子的吸附性能

Magnetic Bio-char Derived from Sewage Sludge and Its Adsorption Ability for Cu(Ⅱ) in Aqueous System

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