Assessment of Ammonia Adsorption onto Teflon and LDPE Tubing Used in Pollutant Stream Conveyance

Assessment of Ammonia Adsorption onto Teflon and LDPE Tubing Used in Pollutant Stream Conveyance
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污染物流输送中使用的特氟龙和 LDPE 管材的氨吸附评估

DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
C. Parnell
C. Parnell
中科院分区：
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文献类型：
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作者：
S. Mukhtar;A. J. Rose;S. Capareda;C. Boriack;R. Lacey;B. W. Shaw;C. Parnell

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污水输送用聚合物管对氨的吸附 评估了可能的系统性损失。实验设计，重复三次，每次32 完成了试验，以研究基于两种标称 温度（25和37 oC），两个标称管道长度（15和46米），六个标称入口 浓度（百万分之2、5、10、15、25和35）和两种管材料（特氟隆和 低密度聚乙烯，LDPE）。对于给定的长度，聚四氟乙烯上的平均氨吸附 发现管材在统计学上小于LDPE。油管长度对 氨吸附对特氟隆不显著，但对LDPE显著。有 标称入口处LDPE的入口和出口浓度之间存在显著差异 浓度为5和15 ppm（α=0.05）。总的来说，氨吸附到特氟隆是 约1ppm，而与入口浓度的大小无关。这一损失对 Teflon表面在氨分析仪的测量灵敏度范围内。氨 LDPE管上的吸附随着入口浓度、温度和 管的长度。
The adsorption of ammonia onto polymer tubing used in pollutant stream conveyance was assessed for possible systematic losses. An experimental design with three replications of 32 trials was completed to investigate the adsorption of ammonia based on two nominal temperatures (25 and 37 oC), two nominal tubing lengths (15 and 46 meters), six nominal inlet concentrations (2, 5, 10, 15, 25, and 35 parts per million), and two tubing materials, (Teflon and low density polyethylene,LDPE). For a given length, mean ammonia adsorption on Teflon tubing was found to be statistically less than that from LDPE. The effect of tubing length on ammonia adsorption was not significant for Teflon, but was significant for LDPE. There were significant differences between inlet and outlet concentrations of LDPE at nominal inlet concentrations of 5 and 15 ppm (α=0.05). Overall, ammonia adsorption to Teflon was approximately 1 ppm regardless of the magnitude of inlet concentration. This loss on to the Teflon surface was well within the measurement sensitivity of the ammonia analyzer. Ammonia adsorption onto LDPE tubing increased with increasing inlet concentration, temperature and length of the tubing.