海砂净化溶液氯离子和盐度在线监测系统搭建及应用OA北大核心CSCDCSTPCD

Excessive chloride ions and salinity in sea sand can induce steel corrosion,considerably threatening the durability of concrete structures.Therefore,real-time monitoring of the purification process is essential.This study developed an online monitoring system for chloride ions and salinity during sea sand purification based on ion-selective electrode and conductivity methods.The test results demonstrate that the proposed system exhibits high stability and accuracy with linear detection ranges of 1-1×10⁴ mg∙kg⁻¹ for chloride ions and 10-1×10⁴ mg∙kg⁻¹ for salinity.Within the concentration intervals of 10-5500 mg∙kg⁻¹ for chloride ions and 70-9000 mg∙kg⁻¹ for salinity,the detection accuracy exceeds 97%.Field monitoring data further reveal that the variation trends of chloride ion concentration in purified wash water and sand samples are consistent,indicating that an indirect and real-time assessment of chloride ion content in sand can be achieved by monitoring the wash water.This system provides an effective technical approach for optimizing the sea sand purification process and control-ling the quality of the final product.