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چهارشنبه 7 آبان 1393 :: نویسنده : hassan mahmoudi

10 Recent Developments

in Controlling Silica and

Magnesium Silicate Foulants

in Industrial Water Systems

Konstantinos D. Demadis

10.1 INTRODUCTION

Fouling presents an enormous challenge in industrial process waters [1]. Often system operators are

obligated to discard critical equipment components because of fouling and the inability to remove it.

Even if mechanical or chemical cleaning are viable options, they require several hours, total system

shutdowns, and high costs [2]. Foulants could be organic or inorganic, as illustrated in Figure 10.1.

Organic foulants are a result of poor system biocontrol, or deposition of organic matter brought

into the system from external sources (e.g., a river or lake) [3]. Inorganic foulants include crystalline

sparingly soluble salts such as calcium carbonate(s), calcium sulfate(s), barium, and strontium

sulfates, as well as amorphous and colloidal deposits, such as amorphous calcium phosphate, silica,

magnesium silicate, and many others, depending on the particular water chemistry [4]. This chapter

deals with silica and metal silicate scales and deposits (with an emphasis on magnesium silicate).





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مدیر وبلاگ : hassan mahmoudi
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