阻垢剂阻BaSO_4垢性能的电导滴定评价法  

Evaluation of Conductivity Titration on Inhibiting Performance of Antiscalants on BaSO_4

作　　者：张冰如[1] 王森[1] 曹晓静[1] 李风亭[1] 张晶[1] 

机构地区：[1]同济大学环境科学与工程学院国家污染控制与资源化研究重点实验室,上海200092

出　　处：《应用化学》2007年第4期429-433,共5页Chinese Journal of Applied Chemistry

基　　金：上海市科委科研计划项目(06DZ0511)

摘　　要：采用一种基于电导滴定原理的评价方法,通过测定电导滴定过程中不同阻垢剂在相同浓度下所能维持的BaSO4的最大相对过饱和度来评价阻垢性能。实验对阻垢剂聚环氧琥珀酸(PESA)、聚天冬氨酸(PASP)、二亚乙基三胺五亚甲基膦(DEPTMP)、六偏磷酯钠(SHMP)阻BaSO4垢的性能分别采用了电导滴定法及静态阻垢法进行测定并比较。电导滴定法对阻垢剂阻BaSO4垢性能的测试结果表明,阻垢剂PESA、PASP、DTPMP和SHMP对BaSO4垢的阻垢能力大小为:PESA>PASP>DEPTMP>SHMP,这与静态阻垢法的实验结果一致,表明电导滴定法与静态阻垢法对阻垢剂阻BaSO4垢的评价结果具有一致性,电导滴定法评价阻垢剂对BaSO4垢的阻垢性能具有快速、简单、易行的优点。而且实验表明,电导滴定法的RSD为0.020,而静态阻垢法为0.069,说明电导滴定法的重现性优于静态阻垢法。该法还可用于评价阻垢剂对BaSO4垢的协同阻垢效应。The scale inhibition performance of different antiscalants, PESA, PASP, DEPTMP and SHMP were determined by measuring the maximum relative degree of supersaturation of BaSO4 under the same antiscalant concentration via a method based on conductivity titration. The result indicates the sequence of scale inhibition performances is PESA 〉 PASP 〉 DEPTMP 〉 SHMP, which is the same as that obtained by static method. Comparison between the two methods demonstrates that the conductivity titration method is more reliable. In addition, it shows that the conductivity titration method is a fast, easy, convenient, good repeatable technique, which can also be used to evaluate the synergistic inhibiting effect of antiscalants on preventing BaSO4 precipitation.

关 键 词：BaSO4垢 阻垢剂 阻垢 协同阻垢效应 

分 类 号：O657[理学—分析化学] TQ085.4[理学—化学]