Enhancing data reliability in quantitative characterization of moisture distribution in sludge using DSC: Impact of sample attributes and test parameters.
Enhancing data reliability in quantitative characterization of moisture distribution in sludge using DSC: Impact of sample attributes and test parameters.
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DOI：
10.1016/j.jenvman.2023.119017
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发表时间：
2023-09
影响因子：
8.7
通讯作者：
Ya-Li Zhang;Hao Zhang;Wen-Hui Liu;Ping Sun;Shao-Ming Zheng;Yun-Yan Gao;Yuan-Ping Zeng;
中科院分区：
文献类型：
--
作者：
Ya-Li Zhang;Hao Zhang;Wen-Hui Liu;Ping Sun;Shao-Ming Zheng;Yun-Yan Gao;Yuan-Ping Zeng;
了解污泥含水率分布，特别是结合水含量，是研究和应用污泥脱水的关键。差示扫描量热法（DSC）已被广泛用于污泥中水分分布的定量表征。但该方法也存在一定的局限性，如结果重现性差，导致不同论文中参数取值存在争议，妨碍结果比较等。本研究探讨了污泥样品的主要属性对污泥结合水DSC测定结果的影响，结果表明，污泥样品的含水率和质量对DSC测定结果的重复性和稳定性有显著影响。为确保数据可靠性，污泥样品的含水率应尽量减少，并保持在84%以下，质量不超过10 mg。与污泥含水量和样品质量的影响相比，加热速率（1 ~ 5 °C/min）对DSC测试结果的影响最小。本研究提供了一个全面的洞察如何样品属性和测试参数影响的定量表征结合水的污泥使用DSC方法。此外，提出了实用的策略，以提高该方法的适用性，在污泥结合水表征。
Exploring moisture distribution, especially bound water content, is vital for studying and applying sludge dewatering. The differential scanning calorimetry (DSC) method has been extensively utilized for the quantitative characterization of moisture distribution in sludge. However, this method has certain limitations, such as low reproducibility of results, leading to controversial parameter values in different papers and hindering result comparison. In this study, we investigated the influence of key sample attributes on measuring sludge bound water using the DSC method.The findings demonstrated that the moisture content and mass of sludge samples substantially influenced the reproducibility and stability of DSC test results. To ensure data reliability, the moisture content of the sludge sample should be minimized and kept below 84%, with the mass not exceeding 10 mg. Compared to the influence of sludge moisture content and sample mass, the heating rate (1⁓5 °C/min) minimally affected DSC test results. This study offers a comprehensive insight into how sample attributes and test parameters affect the quantitative characterization of bound water in sludge using the DSC method. Furthermore, practical strategies are presented to enhance the method's applicability in sludge bound water characterization.