Fe3O4/石墨烯-H2O2预处理对污泥脱水性能的影响及其作用机理

汪日平; 王继鹏; 周正伟; 何光裕; 陈海群

doi:10.12030/j.cjee.201612025

环境工程学报

Fe3O4/石墨烯-H2O2预处理对污泥脱水性能的影响及其作用机理

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汪日平, 王继鹏, 周正伟, 何光裕, 陈海群. Fe3O4/石墨烯-H2O2预处理对污泥脱水性能的影响及其作用机理[J]. 环境工程学报, 2017, 11(10): 5590-5596. doi: 10.12030/j.cjee.201612025

引用本文:

WANG Riping, WANG Jipeng, ZHOU Zhengwei, HE Guangyu, CHEN Haiqun. Effect of pretreatment by Fe3O4/Graphene-H2O2 on sludge dewaterability and its mechanism[J]. Chinese Journal of Environmental Engineering, 2017, 11(10): 5590-5596. doi: 10.12030/j.cjee.201612025

Citation:

WANG Riping, WANG Jipeng, ZHOU Zhengwei, HE Guangyu, CHEN Haiqun. Effect of pretreatment by Fe3O4/Graphene-H2O2 on sludge dewaterability and its mechanism[J]. Chinese Journal of Environmental Engineering, 2017, 11(10): 5590-5596. doi: 10.12030/j.cjee.201612025

Fe3O4/石墨烯-H2O2预处理对污泥脱水性能的影响及其作用机理

1.
常州大学环境与安全工程学院, 常州市石墨烯环境安全材料重点实验室, 常州 213164
基金项目:
国家自然科学基金资助项目（51472035，51572036）

江苏省科技厅（BY2015027-18，2016029-12）

常州市科技局基金资助项目（CM20153006，CE20160001-2）
中图分类号: X705

Effect of pretreatment by Fe3O4/Graphene-H2O2 on sludge dewaterability and its mechanism

1.
Changzhou Key Laboratory of Graphene-Based Materials for Environment & Safety, School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, China
Fund Project:

摘要: 采用共沉淀法制备四氧化三铁/石墨烯（Fe3O4/GE）材料，并对其进行表征，将其与H2O2组成非均相类Fenton体系用来预处理污泥，发现此类Fenton体系能显著降低污泥比阻（SRF），并深入分析其作用机理。研究了pH、反应时间、反应温度以及Fe3O4/GE-H2O2投加量对污泥胞外聚合物（EPS）破解的影响。结果表明，适宜反应条件为：pH 4.0，反应时间为90 min，反应温度为50 ℃，Fe3O4/GE投加量为1 g·L-1，H2O2与Fe3O4/GE投加量之比控制在8~12之间。在该条件下，污泥上清液中的SCOD、多聚糖和蛋白质浓度分别由56.47、11.48和8.21 mg·L-1增加到498.31、406.72和286.29 mg·L-1。Fe3O4/GE-H2O2非均相类Fenton体系在有效破解EPS的同时，对于污泥的脱水性能也有明显的改善作用，促进了污泥的后续处理。
- 剩余污泥 /
- 非均相类Fenton体系 /
- 四氧化三铁/石墨烯 /
- 胞外聚合物 /
- 多聚糖 /
- 蛋白质 /
- SCOD
Abstract: Fe3O4/graphene(Fe3O4/GE) was prepared by a co-precipitation method and characterized in this study, which then was applied as heterogeneous Fenton-like system for pretreatment of sludge. It was found that the Fenton-like system significantly reduced sludge specific resistance to filtration (SRF). The mechanism of action was also investigated in depth. The study of the effect of pH, reaction time, reaction temperature and Fe3O4/GE-H2O2 loading on the disintegration of sludge extracellular polymeric substances (EPS) indicated that the optimal operational conditions were pH of 4.0, reaction time of 90 min, reaction temperature of 50℃, when Fe3O4/GE dosage was 1 g·L-1, the dosage ratio of H2O2 to Fe3O4/GE was controlled between 8 and 12.Under these conditions, the concentration of soluble COD (SCOD), polysaccharide and protein in sludge supernatant increased from 56.47, 11.48, 8.21 mg·L-1 to 498.31, 406.72, 286.29 mg·L-1, respectively. While EPS was effectively disintegrated, the dewatering performance of sludge was improved obviously by Fe3O4/GE-H2O2 heterogeneous Fenton-like system, which would promote the subsequent treatment of sludge.
- excess sludge /
- heterogeneous Fenton-like system /
- Fe3O4/GE /
- extracellular polymeric substances(EPS) /
- polysaccharide /
- protein /
- SCOD

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Citation:

Fe3O4/石墨烯-H2O2预处理对污泥脱水性能的影响及其作用机理

1. 常州大学环境与安全工程学院, 常州市石墨烯环境安全材料重点实验室, 常州 213164

收稿日期: 2017-01-03

基金项目:

国家自然科学基金资助项目（51472035，51572036）

江苏省科技厅（BY2015027-18，2016029-12）

常州市科技局基金资助项目（CM20153006，CE20160001-2）

关键词:

摘要: 采用共沉淀法制备四氧化三铁/石墨烯（Fe3O4/GE）材料，并对其进行表征，将其与H2O2组成非均相类Fenton体系用来预处理污泥，发现此类Fenton体系能显著降低污泥比阻（SRF），并深入分析其作用机理。研究了pH、反应时间、反应温度以及Fe3O4/GE-H2O2投加量对污泥胞外聚合物（EPS）破解的影响。结果表明，适宜反应条件为：pH 4.0，反应时间为90 min，反应温度为50 ℃，Fe3O4/GE投加量为1 g·L-1，H2O2与Fe3O4/GE投加量之比控制在8~12之间。在该条件下，污泥上清液中的SCOD、多聚糖和蛋白质浓度分别由56.47、11.48和8.21 mg·L-1增加到498.31、406.72和286.29 mg·L-1。Fe3O4/GE-H2O2非均相类Fenton体系在有效破解EPS的同时，对于污泥的脱水性能也有明显的改善作用，促进了污泥的后续处理。

English Abstract

Effect of pretreatment by Fe3O4/Graphene-H2O2 on sludge dewaterability and its mechanism

1. Changzhou Key Laboratory of Graphene-Based Materials for Environment & Safety, School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, China

Received Date: 2017-01-03

Fund Project:

Keywords:

excess sludge /
heterogeneous Fenton-like system /
Fe3O4/GE /
extracellular polymeric substances(EPS) /
polysaccharide /
protein /
SCOD

Abstract: Fe3O4/graphene(Fe3O4/GE) was prepared by a co-precipitation method and characterized in this study, which then was applied as heterogeneous Fenton-like system for pretreatment of sludge. It was found that the Fenton-like system significantly reduced sludge specific resistance to filtration (SRF). The mechanism of action was also investigated in depth. The study of the effect of pH, reaction time, reaction temperature and Fe3O4/GE-H2O2 loading on the disintegration of sludge extracellular polymeric substances (EPS) indicated that the optimal operational conditions were pH of 4.0, reaction time of 90 min, reaction temperature of 50℃, when Fe3O4/GE dosage was 1 g·L-1, the dosage ratio of H2O2 to Fe3O4/GE was controlled between 8 and 12.Under these conditions, the concentration of soluble COD (SCOD), polysaccharide and protein in sludge supernatant increased from 56.47, 11.48, 8.21 mg·L-1 to 498.31, 406.72, 286.29 mg·L-1, respectively. While EPS was effectively disintegrated, the dewatering performance of sludge was improved obviously by Fe3O4/GE-H2O2 heterogeneous Fenton-like system, which would promote the subsequent treatment of sludge.

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Fe3O4/石墨烯-H2O2预处理对污泥脱水性能的影响及其作用机理

Effect of pretreatment by Fe3O4/Graphene-H2O2 on sludge dewaterability and its mechanism

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Fe3O4/石墨烯-H2O2预处理对污泥脱水性能的影响及其作用机理

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Effect of pretreatment by Fe3O4/Graphene-H2O2 on sludge dewaterability and its mechanism

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