Page 216 - 《精细化工》2020年第12期

第 37 卷第 12 期 精 细 化 工 Vol.37, No.12
2020 年 12 月 FINE CHEMICALS Dec. 2020

水处理技术与环境保护
硫酸盐还原剩余污泥-生物炭制备

及其对 Cr(Ⅵ)去除

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马 蕊，吴耀国，张明宽，闫雪倩，白琳嵚，钱 进
（西北工业大学 化学与化工学院，陕西 西安 710072）

摘要：以硫酸盐还原剩余污泥（SRS）作为生物质原料，在 500 ℃限氧条件下制备生物炭材料（SBC-500）,
并以某污水处理厂污泥浓缩池中的厌氧污泥制备的生物炭（BC-500）作为对照。采用 SEM、XRD、FTIR
及 BET 对两种生物炭进行了表征，并对比不同材料对 Cr(Ⅵ)的去除能力。结果表明，与 BC-500 相比，SBC-500
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在产率、灰分及孔容方面具有优势，其 BET 比表面积为 17.90 m /g，明显大于 BC-500（10.24 m /g）。SBC-500
表面孔道结构明显，生物炭内部镶嵌有不规则边缘晶型结构，XRD 观测到石墨烯碳、非晶型碳及 FeS 晶型
结构存在，FTIR 图谱出现 O==S==O 的反对称伸缩振动峰。在 pH 为 3，投加量为 0.2 g，Cr(Ⅵ)初始质量浓
度为 10 mg/L，吸附 48 h 后，SBC-500 对 Cr(Ⅵ)去除率达到 100%，Cr(Ⅵ)初始质量浓度增至 200 mg/L 时，
SBC-500 对 Cr(Ⅵ)的吸附量为 8.22 mg Cr(Ⅵ)/g，与 BC-500 相比，SBC-500 对 Cr(Ⅵ)具有更好的去除能力。
关键词：硫酸盐还原污泥；生物炭；吸附；Cr(Ⅵ)；污泥处置；水处理技术
中图分类号：X705 文献标识码：A 文章编号：1003-5214 (2020) 12-2578-08

Preparation of sulfate reducing sludge-based biochar and its removal of Cr(Ⅵ)

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MA Rui, WU Yaoguo, ZHANG Mingkuan, YAN Xueqian, BAI Linqin, QIAN Jin
（School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China）

Abstract: Sulfate reducing sludge (SRS) was employed as raw biomass material to prepare biochar
material (SBC-500) under oxygen-limited condition at 500 ℃, and biochar (BC-500) prepared from
anaerobic sludge in the sludge thickening tank in a sewage treatment plant was used as a control. Both
materials were characterized by SEM, XRD, FTIR and BET. Their capability to remove Cr(Ⅵ) were
compared. The results showed that the SBC-500 was superior to BC-500 in terms of biochar yield, ash
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content and pore volume. The BET of SBC-500 was 17.90 m /g, larger than that of BC-500 (10.24 m /g).
For SBC-500, the surface had clear porous structure and the interior was embedded with irregular marginal
crystal structure. The presences of graphene carbon, amorphous carbon and FeS crystal were confirmed by
XRD. The anti-symmetric stretching peak of O==S==O bond could be observed. The removal efficiency of
SBC-500 for Cr(Ⅵ) achieved 100% after adsorption for 48 h under the condition of pH = 3, dosage 0.2 g
and initial mass concentration of Cr (Ⅵ) 10 mg/L. When the initial mass concentration increased to
200 mg/L, the adsorption capacity of SBC-500 for Cr(Ⅵ) was 8.22 mg Cr(Ⅵ)/g. SBC-500 had better
capability to remove Cr(Ⅵ) than BC-500.
Key words: sulfate reducing sludge (SRS); biochar; adsorption; Cr(Ⅵ); sludge disposal; water treatment
technology

收稿日期：2020-05-17; 定用日期：2020-08-24; DOI: 10.13550/j.jxhg.20200410
基金项目：中央高校基本科研业务费项目（3102019AX18, 310201911cx021）
作者简介：马 蕊（1994—），女，博士生，E-mail：m18592017056@163.com。联系人：钱 进（1987—），男，副教授，E-mail：
qianjin@nwpu.edu.cn。