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Colloidal silica (SiO2) is perhaps the most undesirable inorganic deposit formed in process cooling waters, especially on metallic surfaces such as heat exchangers or pipelines. Conventional mineral scale inhibitors do not inhibit its formation. Chemical cleaning is difficult and not free of hazards. Research on silica scale formation and prevention is ongoing and has led to various chemical approaches. This article covers silica fouling and discusses several treatments, with emphasis on those using inhibitors with dendrimeric structure.
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Demadis et al. (2004) studied this question.
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