加热方式对固体废物水分含量测定的影响研究  

Research on the Influence of Heating Methods on the Determination of Moisture Content of Solid Waste

作　　者：龙雯琪 潘海婷 朱日龙[2] 张霖琳[3] 李憬然 谢沙 朱瑞瑞 LONG Wenqi;PAN Haiting;ZHU Rilong;ZHANG Linlin;LI Jingran;XIE Sha;ZHU Ruirui(State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants,Hunan Ecological and Environmental Monitoring Center,Changsha 410019,China;College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China;State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring,China National Environmental Monitoring Centre,Beijing 100012,China)

机构地区：[1]湖南省生态环境监测中心,国家环境保护重金属污染监测重点实验室,湖南长沙410019 [2]湖南大学化学化工学院,湖南长沙410082 [3]中国环境监测总站,国家环境保护环境监测质量控制重点实验室,北京100012

出　　处：《中国环境监测》2021年第2期135-141,共7页Environmental Monitoring in China

基　　金：国家环境保护标准项目(2016-29);中央高校基本科研业务费专项资金项目(531118010314)。

摘　　要：通过条件实验确定烘箱加热法的恒重条件,确定微波加热法、红外加热法和烘箱加热法测定固体废物水分含量的最佳样品称取量。采用3种方法的最佳条件分别测定了10余种不同类型的固体废物的水分含量,比较了3种方法的测定时间、精密度和测定值的差异性。结果表明:烘箱加热法的最佳恒重条件为前后2次测定差值不超过最终测定质量的±0.1%。烘箱加热法最优称样量范围为25~45 g,红外加热法和微波加热法的最优称样量分别为3.0 g和2.5 g。烘箱加热法所需测定时间最长,约8~28 h,红外加热法和微波加热法所需测定时间分别为4~65 min和1~2 min。3种方法中烘箱加热法精密度最好,且样品水分含量越高精密度越好,烘箱加热法、红外加热法和微波加热法的相对标准偏差范围分别为0.31%~12%、4.6%~18%和1.1%~22%。在0.05的显著性水平上,3种方法测定值不存在显著性差异。The constant weight condition of the oven heating method was determined by the condition experiment The optimum sample weight for the microwave heating method,the infrared heating method and the oven heating method to determine the moisture content of solid waste was determined,too.The moisture content of more than ten different types of solid wastes was determined by using the optimum conditions of three methods,and the differences of determination duration,precision and datas of the three methods were compared.The experimental results showed that the optimum constant weight condition of the oven heating method was that the difference between the two measurements did not exceed±0.1%of the final mass.The range of the optimum sample weight for oven heating method was 25-45 g,while the optimum sample weight for infrared heating method and microwave heating method was 3.0 g and 2.5 g,respectively.The determination duration required by oven heating method was the longest,about 8-28 h,and the determination duration required by infrared heating method and microwave heating method was 4-65 min and 1-2 min,respectively.Among the three methods,the oven heating method had the best precision,and the higher the moisture content of the sample,the better the precision.The relative standard deviations ranges of oven heating method,infrared heating method and microwave heating method were 0.31%-12%,4.6%-18%and 1.1%-22%,respectively.At the significance level of 0.05,there was no significant difference among the three methods.

关 键 词：微波加热法 红外加热法 烘箱加热法 水分含量 固体废物 

分 类 号：X[环境科学与工程]