Page 176 - 《精细化工》2022年第4期

第 39 卷第 4 期 精 细 化 工 Vol.39, No.4
2022 年 4 月 FINE CHEMICALS Apr. 2022

水处理技术与环境保护
水热法制备 Fe/C 复合材料及其对地下

水中三氯乙烯的降解性能

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韩依飏 ，张秀娟 ，魏 通 ，占敬敬
（1. 大连理工大学 化工学院盘锦分院，辽宁 盘锦 124221；2. 生态环境部南京环境科学研究所，江苏
南京 210042；3. 大连理工大学 海洋科学与技术学院，辽宁 盘锦 124221）
摘要：以蔗糖和无水三氯化铁为原料，以盐酸或氨水调节溶液 pH（pH 为 2、4、6、8、10），采用水热-炭化法
合成了一系列 Fe/C 复合材料（Fe/C-pH2、Fe/C-pH4、Fe/C-pH6、Fe/C-pH8、Fe/C-pH10），将 Fe/C-pH10 球磨成
粒径在 100~1000 nm 的产物，记为 Fe/C-pH10-Q。采用 SEM、XRD、TG、N 2 吸附-脱附对 Fe/C 复合材料进行了
表征，考察了其对三氯乙烯（TCE）的吸附和降解性能。结果表明，Fe/C 复合材料中纳米零价铁（nZVI）和生
物炭共同存在，nZVI 随机分散在碳球或碳颗粒上，不发生团聚现象。随着反应液 pH 的增加，Fe/C 复合材料中
nZVI 的含量和粒径从 Fe/C-pH2 的 6.52%、25 nm 增加到 Fe/C-pH10 的 36.35%、50 nm，比表面积由 Fe/C-pH2
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的 369 m /g 减小到 Fe/C-pH10 的 302 m /g 。 Fe/C 复合材料对 TCE 降解速率由大到小 顺序为：
Fe/C-pH10>Fe/C-pH8> Fe/C-pH6>Fe/C-pH4>Fe/C-pH2。Fe/C-pH10 对 TCE 的去除率约为 100%（48 h）。球磨不
会改变 Fe/C 复合材料中 nZVI 粒径、含量和材料的反应活性。此外，Fe/C-pH10-Q 具有良好的地下传输性能，其
流动性比市售 nZVI 和 Fe/C-pH10 显著提高。
关键词：Fe/C 复合材料；纳米零价铁；地下水修复；三氯乙烯；降解；水处理技术与环境保护
中图分类号：TB333 文献标识码：A 文章编号：1003-5214 (2022) 04-0812-08

Hydrothermal preparation of iron/carbon composites and their
degradation for trichloroethylene in groundwater

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HAN Yiyang , ZHANG Xiujuan , WEI Tong , ZHAN Jingjing
(1. School of Chemical Engineering, Dalian University of Technology, Panjin Campus, Panjin 124221, Liaoning, China;
2. Nanjing Institute of Environmental Sciences, Ministry of Ecological Environment, Nanjing 210042, Jiangsu, China;
3. School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, Liaoning, China)
Abstract: A series of Fe/C composites (Fe/C-pH2, Fe/C-pH4, Fe/C-pH6, Fe/C-pH8, Fe/C-pH10) were
synthesized by hydrothermal-carbonization method using sucrose and anhydrous ferric chloride as raw
materials by adjusting the pH (2, 4, 6, 8, 10) of solution with hydrochloric acid or ammonia. Fe/C-pH10
was further ground into a product with a particle size of 100~1000 nm, denoted as Fe/C-pH10-Q. The Fe/C
composites were characterized by SEM, XRD, TG and N 2 adsorption-desorption. The adsorption and
degradation properties of Fe/C composites for trichloroethylene (TCE) were investigated. The results
showed that nano-zero-valent iron (nZVI) and biochar co-existed in Fe/C composites, and nZVI was
randomly dispersed on carbon spheres or particles without agglomeration. With the increase of pH of
reaction solution, the content and particle size of nZVI in Fe/C composites increased from 6.52% and 25 nm
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of Fe/C-pH2 to 36.35% and 50 nm of Fe/C-pH10, while the specific surface area decreased from 369 m /g
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of Fe/C-pH2 to 302 m /g of Fe/C-pH10. The degradation rate of TCE by Fe/C composites was in descending
order: Fe/C-pH10> Fe/C-pH8>Fe/C-pH6>Fe/C-pH4>Fe/C-pH2. The removal rate of TCE by Fe/C-pH10
was about 100% (48h). The particle size, content and reactivity of nZVI in Fe/C composites were not
changed by ball milling. In addition, Fe/C-pH10-Q had excellent underground transport performance and its

收稿日期：2021-12-01; 定用日期：2021-12-27; DOI: 10.13550/j.jxhg.20211226
基金项目：国家自然科学基金项目（21876022）；国家重点研发计划（2019YFC1803803）
作者简介：韩依飏（2002—），女，本科生。联系人：张秀娟（1978—），女，博士，副教授，E-mail：xiujuanzhang@dlut.edu.cn；
占敬敬（1978—），男，博士，教授，E-mail：jingjingzhan@dlut.edu.cn。