提高天然水硝态氮还原率的正交设计条件优选

摘要

The orthogonal test was designed to investigate the influencing factors on the nitrate reduction rate by zinc-cadmium reduction method.Four main factors including reduction time,matrix salinity,pH,zinc sheet area were selected in the L16 (41 × 212) orthogonal design.The results showed that the reduction time,matrix salinity and zinc sheet area could affect the reduction rate.The optimal levels were 12min of reduction time,salinity 35 and the 5cm × 6cm of zinc sheet area.%本文利用正交试验对可能影响锌-镉还原法测定水中硝态氮还原率的因素进行了实验探讨.通过对还原时间、基质盐度、pH、锌片面积等四个因素的选择,并以L16(41 ×212)正交设计安排实验,得出还原时间、基质盐度、锌片面积对实验结果影响显著.上述因素中的最优水平组合为还原时间为12min,基质盐度为35,锌片面积大小为5cm×6cm.