2. Ferric Iron in Well Water. Also known as red water iron, ferric iron in well water is essentially clear water iron that has been exposed to oxygen – usually from the air, thereby oxidizing. Carbon dioxide leaves the water and the oxygen combines with the iron to form ferric ions (Fe+++). This gives the water a red rust coloring. water soluble chitosan was prepared practically by hydrolysis of chitosan with commercial α-amylase [19,20]. Enzyme catalyzed production of WSC was obtained by chitosanolytic enzyme which was isolated from the soluble part of jelly fig latex. The jelly fish latex chitosanase was used to hydrolysis of chitosan derivatives,.