METHOD FOR SUPPRESSING DEPLETION OF AZOLE COMPOUNDS

To provide a method for effectively suppressing the depletion of an added azole compound in water treatment where the azole compound is added as a metal corrosion inhibitor to an aqueous system.SOLUTION: In water treatment in which an azole compound is added to an aqueous system, particles having a particle size of 0.45 μm or more contained in the aqueous system are removed in a step before or after the addition of the azole compound to the aqueous system. The simple step of removing particles having a particle size of 0.45 μm or more from the aqueous system before or after the addition of the azole compound can effectively suppress the depletion of the azole compound added to the aqueous system without requiring the addition of new chemicals.SELECTED DRAWING: Figure 1 【課題】水系に金属防食剤としてアゾール系化合物を添加する水処理において、添加されたアゾール系化合物の消耗を効果的に抑制する。【解決手段】水系にアゾール系化合物を添加する水処理において、該水系へのアゾール系化合物添加の前又は後の工程で、該水系内の粒径０．４５μｍ以上の粒子を取り除く。アゾール系化合物の添加の前後の工程で、水系内の粒径０．４５μｍ以上の粒子を取り除くという簡易な作業で、新たな薬剤の添加を必要とすることなく、水系に添加されたアゾール系化合物の消耗を効果的に抑制することができる。【選択図】図１