| 郭富森,葛强,周贤波,王艳,朱丛韵,刘宽勇,万金泉.PS-AOPs法造纸废水处理中COD测定失真的影响机制及消除方法[J].中国造纸,2026,45(4):168-173 |
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| PS-AOPs法造纸废水处理中COD测定失真的影响机制及消除方法 |
| Interference Mechanisms and Elimination Methods for COD Determination Distortion in the PS-AOPs Process for Papermaking Wastewater Treatment |
| 收稿日期：2025-09-25 修订日期：2025-11-11 |
| DOI：10.11980/j.issn.0254-508X.2026.04.021 |
| 关键词: 造纸废水 过硫酸盐高级氧化 COD测定失真 |
| Key Words:papermaking wastewater persulfate-based advanced oxidation COD determination distortion |
| 基金项目: |
| 作者 | 单位 | 邮编 | | 郭富森* | 1华南理工大学环境与能源学院,广东广州,510006 | 510006 | | 葛强 | 2中国轻工业长沙工程有限 公司,湖南长沙,410014 | 410014 | | 周贤波 | 3贵州鹏昇（集团）纸业有限责任公司,贵州黔西南,552401 | 552401 | | 王艳* | 1华南理工大学环境与能源学院,广东广州,510006
4华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 | | 朱丛韵 | 2中国轻工业长沙工程有限 公司,湖南长沙,410014 | 410014 | | 刘宽勇 | 3贵州鹏昇（集团）纸业有限责任公司,贵州黔西南,552401 | 552401 | | 万金泉 | 1华南理工大学环境与能源学院,广东广州,510006
4华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 | 510640 |
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摘要:针对过硫酸盐高级氧化技术（PS-AOPs法）处理造纸废水致COD测定失真的问题，本研究通过监测数据与元素分析（ICP-MS/IC），确认S2O82-![]() ![]() 、Fe2+及Cl-为核心干扰源，其干扰机制表现为消耗氧化剂引起的正干扰、消耗滴定剂导致的负干扰，并在复杂基质中呈非线性叠加。据此，开发并验证了一种综合消除方案：用Na2SO3还原S2O82-![]() ![]() （质量比≥1∶1，90 ℃，60 min，去除率>94%）；按Cl-浓度优化HgSO4掩蔽（质量比15∶1，误差<5%）；Fe2+化学计量校正。加标回收实验显示，回收率达97%~102%，验证了该方案可有效克服复杂基质干扰，显著提升COD测定的准确性。 |
Abstract:To address the issue of COD measurement distortion in papermaking wastewater treatment using persulfate-based advanced oxidation processes (PS-AOPs)， this study identified S2O82-![]() ![]() ， Fe2+， and Cl- as the primary interference sources through monitoring data and elemental analysis (ICP-MS/IC). The interference mechanisms manifested as positive interference caused by oxidant consumption， negative interference due to titrant depletion， and their nonlinear superposition in complex matrices. Based on these findings， an integrated elimination protocol was developed and validated： S2O82-![]() ![]() was reduced using Na2SO3 (mass ratio≥1∶1 at 90 ℃ for 60 min， achieving >94% removal)； HgSO4 masking was optimized according to Cl- concentration (mass ratio 15∶1， with <5% error)； and Fe2+ was corrected via stoichiometric calibration. Spike and recovery experiments demonstrated recoveries of 97%~102%， confirming that the protocol effectively overcame complex matrix interferences and significantly improved COD measurement accuracy. |
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