淡水壳菜污损体系及其对输水建筑物侵蚀现状分析

Analysis on the Fouling System of Freshwater Shell Vegetable and Its Erosion to Water Conveyance Building

以国内某大型供水工程为背景,研究淡水壳菜污损体系的代谢物、对水质影响与附着机理,并分析其对输水建筑物的侵蚀状况。研究结果表明,淡水壳菜为主的污损体系主要代谢产物为乙酸、丙酸和丙三醇,呈弱酸性,对水泥水化产物有侵蚀分解作用;淡水壳菜分泌的足丝蛋白与附着基以氢键和配位键形成化学键合,足丝蛋白由至少8种蛋白组成,黏附力极强。过水混凝土面容易遭受淡水壳菜污损体系的侵蚀,导致砂浆流失、骨料外露,影响输水建筑物的结构与安全。

Based on the background of a large water supply project in China, this paper studies the metabolites, the effect on water quality and the attachment mechanism of the freshwater shell vegetable fouling system, and analyzes the erosion status of the freshwater shell vegetable fouling system to the water conveyance buildings. The results show that the main metabolites of the fouling system are acetic acid, propionic acid and glycerol, which are weakly acidic and have erosive decomposition to the cement hydration products. The pedal protein secreted by Brassica tenuifolia is chemically bound to the attached group by hydrogen bond and coordination bond. The pedal protein is composed of at least 8 kinds of proteins and has a strong adhesive force. The overwatered concrete face is easy to be corroded by the fouling system of fresh water shell vegetables, which leads to the loss of mortar and the exposure of aggregates, and affects the structure and safety of the water conveyance building.