{"id":2024,"date":"2022-03-01T09:48:29","date_gmt":"2022-03-01T01:48:29","guid":{"rendered":"https:\/\/felitecn.com\/?p=2024"},"modified":"2023-02-27T00:24:03","modified_gmt":"2023-02-26T16:24:03","slug":"water-softener-resins-for-iron-removal","status":"publish","type":"post","link":"https:\/\/felitecn.com\/water-softener-resin\/water-softener-resins-for-iron-removal\/","title":{"rendered":"Water Softener Resins for Iron Removal \u2013 You Need to Know"},"content":{"rendered":"\n<p>Using water softener resins for Iron removal will be an effective method, but it will be complicated due to the different forms of Iron in water.<\/p>\n\n\n\n<p>Before understanding iron removal, it is essential to discuss water softening, resins, and ion exchange. Increasing your key information on simple water chemistry: pH, Iron, and hardness will be advantageous for iron removal water softeners.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:35px\"><strong>What are Water Softening and its Purpose?<\/strong><\/h2>\n\n\n\n<p>Water can dissolve massive amounts of substances. Therefore we can say water is a universal solvent. While these substances dissolve in water, they can be ionic or non-ionic. Ionic particles either carry positive charges or negative charges. Non-ionic particles have no charge, and they are neutral.<\/p>\n\n\n\n<p>Water that carries Ca<sup>2+<\/sup> and Mg<sup>2+<\/sup> ions more than the highest desirable level is called &#8220;Hard Water&#8221; or hardness in water. Elevated calcium and magnesium ions make it challenging to dissolve soaps in water and clog pipelines, reducing the efficiency of kettles and heaters.<\/p>\n\n\n\n<p>&#8220;Removal process of Calcium and Magnesium ions from Water&#8221; called <strong><em>Water Softening<\/em><\/strong>. Ion exchanging is the simplest and most economically effective method for it.&nbsp;&nbsp;<\/p>\n\n\n\n<p>A water softener is equipment that exchanges above cations inside the softener unit with the help of water softener resins.<\/p>\n\n\n\n<p>Resins within the softening plant tightly hold its negatively charged anions which is attractive for any cations. At the initial stage, resin beads are coated with Na<sup>+ <\/sup>ions. During the process, Resins exchange Na<sup>+<\/sup> ions with Ca<sup>2+ <\/sup>and Mg<sup>2+ <\/sup>ions. So softened water carries Na<sup>+<\/sup> ions.<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1440\" height=\"530\" class=\"wp-image-3783\" style=\"width: 1450px;\" src=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/08\/Simple-process-of-Water-softener.jpeg\" alt=\"\" srcset=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/08\/Simple-process-of-Water-softener.jpeg 1440w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/08\/Simple-process-of-Water-softener-300x110.jpeg 300w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/08\/Simple-process-of-Water-softener-1024x377.jpeg 1024w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/08\/Simple-process-of-Water-softener-768x283.jpeg 768w\" sizes=\"(max-width: 1440px) 100vw, 1440px\" \/><\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:35px\"><strong>What are Softener Resins?<\/strong><\/h2>\n\n\n\n<p>\u201cElectro statistically sensitive plastic beads\u201d are called Resins. Resins are very much porous.<\/p>\n\n\n\n<p>Resins are essential materials throughout the whole process of water softening. Mainly, the performance of a water softener depends on the effectiveness of inserted resin. Knowing how resins work will help you select the best water softener and re-bedding your existing softener that meets your target; hardness and iron removal.<\/p>\n\n\n\n<h3 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:26px\"><strong>Understanding crosslink percentage<\/strong><\/h3>\n\n\n\n<p>\u201cCrosslinks\u201d are resulted in resins during its manufacturing in different percentages. In other words, the structural integrity of resin beads can be addressed as crosslinks.&nbsp;<\/p>\n\n\n\n<p>Mixing polymer components in various ratios cause to results in different crosslink percentages. They can vary as 7%, 8%, 10%, and 12% in common.<\/p>\n\n\n\n<ul>\n<li>Resins are strong, hard, and durable with increasing crosslink percentage.<\/li>\n\n\n\n<li>Higher crosslinks support resins to be more resistant to chemical and physical breakdowns.<\/li>\n\n\n\n<li>Moisture content in resins with a lower crosslinked percentage is heightened and causes less tolerance to chlorine.<\/li>\n\n\n\n<li>Resin capacity increases with increasing crosslink percentage.<\/li>\n\n\n\n<li>Resins with more crosslinks operate successfully in high temperatures.<\/li>\n<\/ul>\n\n\n\n<p>The standard crosslink percentage in the industry is 8%. Water softeners that use 10% beads show a bit of high performance.<\/p>\n\n\n\n<h3 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:26px\"><strong>Advantage and Disadvantage of the Fine Mesh Water Softener Resin<\/strong><\/h3>\n\n\n\n<p>The dimension of a resin bead can interpret as mesh size. Fine mesh size defines resin beads that are smaller in their scope. When beads are getting smaller, they can pack tightly. It is caused to decrease the flow rate through the resin bed. But fine mesh resins increase the surface area of the resin bed to attach more cations. Though fine mesh or ordinary resin fouling can occur, it has a bit high frequency for fouling while considering fine mesh resins. The fine mesh will do a decent job in iron removal with relevant conditions. There should be a unique screen to hold fine mesh resins tightly to limit migration.<\/p>\n\n\n\n<p>Regular type resins prefer to remove hardness, but fines mesh resins like simple iron removal in well water. But there are many conditions on iron removal. Fine mesh can filter Iron from water up to 10 ppm by maintaining the right conditions.<\/p>\n\n\n\n<h3 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:26px\"><strong>How Iron Dissolved in Water?<\/strong><\/h3>\n\n\n\n<p>Why do we need to know about Iron in water before iron removal? Because Iron appears in several forms in nature. Finding its formation in water shows the easy path to select the best method for iron removal.<\/p>\n\n\n\n<p>Iron is one of the most abundant elements in nature. It is present in groundwater due to dissolving different geological formations of Iron due to rainfalls. Iron is very much essential in human nutrition as well as some organisms in the soil. There is no harm with Iron in water, but it is described as contaminated water, but it gives an unpleasant taste for drinking water. Iron-rich water couldn&#8217;t use for cooking purposes due to turning meals into a dark color. It may cause corrosion of steel and cast iron pipes while distributing water. Due to iron bacteria, there is a slimy coating on water supply pipelines. Also, it interferes with laundry activities.<\/p>\n\n\n\n<p>According to the WHO guidelines, there is no taste with a concentration of 0.3 mg\/ltr, but flavor and color can be occurred (<a href=\"https:\/\/www.who.int\/water_sanitation_health\/dwq\/gdwq0506.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.who.int\/water_sanitation_health\/dwq\/gdwq0506.pdf<\/a>).&nbsp;<\/p>\n\n\n\n<p>So it is better to remove Iron from drinking water.<\/p>\n\n\n\n<p>Iron presents two forms in water due to pH and oxidation-reduction potential. One is soluble ferrous ions and insoluble ferric ions. Underground water (deep well water) and surface water in anaerobic conditions contain Iron, as its ferrous (Fe<sup>2+<\/sup>) form. Fe<sup>2+<\/sup> ions dissolve in water with clear and no color. Exposing such water to air or oxidizing agents ( Chlorine) causes Fe<sup>2+<\/sup> ions to convert its Ferric (Fe<sup>3+<\/sup>) ions, which is a reddish-brown substance, making water turbid. Water with ferric Iron is also called &#8220;red water iron .&#8221;Iron can also be present in water as colloidal iron and bacterial iron, except for these two forms.<\/p>\n\n\n\n<p>pH in water helps to determine the solubility of Iron in water.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:35px\"><strong>Can Water Softener Resins Remove Iron?<\/strong><\/h2>\n\n\n\n<p>Water that does not contain Oxygen carries Fe<sup>2+ <\/sup>ions. These ions are more stable with pH &lt; 7. But it is good to keep in mind that ferrous ions are stable in both high and low pH values. Iron in surface water with less pH value than 6 maintains its ferrous states though Oxygen is present.<\/p>\n\n\n\n<p>Water softeners can be used for iron removal when Iron performs its divalent stage (ferrous ions) in relevant pH values. At that procedure, low pH needs to be carefully raised while keeping ferrous ions in the same form. AS per the hardness removal by softener, soluble Iron can remove with exchanging ions.<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1449\" height=\"650\" class=\"wp-image-2028\" style=\"width: 1450px;\" src=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Ferrous-removal-using-softener-resins.jpeg\" alt=\"Ferrous removal using softener resins\" srcset=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Ferrous-removal-using-softener-resins.jpeg 1449w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Ferrous-removal-using-softener-resins-300x135.jpeg 300w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Ferrous-removal-using-softener-resins-1024x459.jpeg 1024w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Ferrous-removal-using-softener-resins-768x345.jpeg 768w\" sizes=\"(max-width: 1449px) 100vw, 1449px\" \/><\/p>\n\n\n\n<p>When we consider the affinity of ferrous ions to the resin beads is lesser than Calcium but higher than Magnesium ions. Similarly, soluble irons are attached to the resin beads, and coated cations in resins are released into the water.<\/p>\n\n\n\n<p>In surface water, ferric ions are more common, and it is insoluble and combined with naturally occurring substances that couldn&#8217;t remove with a softener. Removal of ferric ions through resins is problematic. When ferrous ions are oxidized to ferric ions, it forms tiny particles. They are lesser than one micron. Iron removal ability depends on flow rate, particle size, resin size, and uniformity.<\/p>\n\n\n\n<p>In most cases, removing ferric ion particles in water needs an iron filter, not a softener. It is better to use both an Iron filter and a softener unit to remove hardness and Iron together in the water. It is better to place an Iron filter at first to protect and expand the durability of the water softener.<\/p>\n\n\n\n<p>Organic Iron can&#8217;t remove through softener units. But some formations of organic irons can be removed using organic traps, which means anion resins.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:35px\"><strong>How Regeneration Occur In A <\/strong><strong>Exhausted <\/strong><strong>Resin Bed?<\/strong><\/h2>\n\n\n\n<p>When ion-exchange resins are fully loaded or saturated with contaminated ions in their process, regeneration is the process that takes place to remove picked contaminants and make resins reusable. Concentrated NaCl (concentrated Salt or brine solution) or regenerate chemicals can use to regenerate or increase the capacity of resin beads to reuse over the years.<\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1450\" height=\"649\" class=\"wp-image-2029\" style=\"width: 1450px;\" src=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Resin-regeneration.jpeg\" alt=\"Water Softener Resin Regeneration\" srcset=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Resin-regeneration.jpeg 1450w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Resin-regeneration-300x134.jpeg 300w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Resin-regeneration-1024x458.jpeg 1024w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/Resin-regeneration-768x344.jpeg 768w\" sizes=\"(max-width: 1450px) 100vw, 1450px\" \/><\/p>\n\n\n\n<p>There are a few steps in the regeneration of resins;<\/p>\n\n\n\n<ul>\n<li><strong>Backwashing<\/strong>: Water flows backward through the resin bed from the bottom to the top. It lifts the resin bed and flushes debris, insoluble materials which adhere to the bed. Also, it helps to tighten up resins by removing air pockets. Backwash helps to reduce the pressure drop. Backwash can be done frequently or done when required. Your engineer will guide you with this procedure. Sometimes backwash will not be able to remove suspended Iron in the vessel.<\/li>\n<\/ul>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1449\" height=\"950\" class=\"wp-image-2041\" style=\"width: 1450px;\" src=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/WechatIMG816.jpeg\" alt=\"Simples process of water softener backwashing\" srcset=\"https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/WechatIMG816.jpeg 1449w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/WechatIMG816-300x197.jpeg 300w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/WechatIMG816-1024x671.jpeg 1024w, https:\/\/felitecn.com\/wp-content\/uploads\/2022\/03\/WechatIMG816-768x504.jpeg 768w\" sizes=\"(max-width: 1449px) 100vw, 1449px\" \/><\/p>\n\n\n\n<ul>\n<li><strong>Chemical Injection<\/strong>: After backwashing, the resin bed needs to be settled. Then brine solution is applied through the resin bed. All the hardness ions are released in this service cycle, and resin beds are refreshed with cations (Na<sup>+<\/sup>). Usually, the contact time will be 30 minutes, but it differs from ion-exchange plants&#8217; engineering design.<\/li>\n<\/ul>\n\n\n\n<ul>\n<li><strong>Rinsing<\/strong>: Rinsing takes two steps as <strong>slow rinsing<\/strong> and <strong>fast rinsing<\/strong>. Slow rinsing is used to remove excess brine solution in the vessel taken for regeneration. Diluted softened water is used to slow rinsing. So it will be the pure brine solution that comes to contact with the newly regenerated resin bed; therefore, it should not be fast. Fast rinsing is the last washout done using raw water supply. &nbsp;<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p>It is problematic when iron (ferrous) removal softener resins regenerate. At the same time, the addition of water to the brine tank can carry Oxygen with brine solution. During the regeneration process, Oxygen can meet up with ferrous Irons; then, they convert to Ferric ions and deposit on the surface of resin beads. Regeneration doesn&#8217;t do a decent job of removing precipitated Iron in softeners, so Iron will gradually accumulate within the resin bed and clog the space between resin beads. It may cause pressure loss and short-circuiting of the softener unit, which leads to customer unsatisfactory.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:35px\">Do Resins Face to <strong>Fouling?<\/strong><\/h2>\n\n\n\n<p>Fouling is common with Iron removing as well as water softening processes. The contaminants adhere while exchanging ions, cover the resin surface, and block the total ion exchanging process in the resin beads.<\/p>\n\n\n\n<p>Fouling of resins can occur for many reasons, including Iron &amp; Manganese, Aluminum, Hardness precipitates, oil, and Silica. Irreversible degradation of resins occurs due to organic fouling, Oxidation, and Thermal Degradation. &nbsp;<\/p>\n\n\n\n<p>Here we are going to discuss Iron fouling.<\/p>\n\n\n\n<p>When Iron is present in Ferric forms, it is not dissolved in water and coats them in cation resin as previous learnings. So it prevents the exchange of ions. The presence of Iron and manganese raise organic fouling. The concentration of Iron and Oxygen causes too. Due to the high concentrated Iron, fouling can also occur with frequent backwash. So it is better to use a filter before the ion exchange unit. As a remedial action in Iron fouling, strong acids and reducing agents can treat cation resins.<\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"has-text-color wp-block-heading\" style=\"color:#053bb1;font-size:35px\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p>If you have Iron in water, you first need to identify which type of Iron is present in the water. Whether they are organic, ferrous, or ferric, select the best method to remove Iron.<\/p>\n\n\n\n<p>Ferrous Iron is more stable at low pH. The use of 10% crosslink water softener resin or fine mesh resins effectively removes Ferrous (Fe<sup>2+<\/sup>) ions.<\/p>\n\n\n\n<p>Water softener resin is the easiest and economically practical method for eliminating soluble Iron in water.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Using water softener resins for Iron removal will be an effective method, but it will be complicated due to the different forms of Iron in water. pH, Iron, and hardness will be advantageous for iron removal water softeners.<\/p>\n","protected":false},"author":1,"featured_media":2032,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Water Softener Resins for Iron Removal \u2013 You Need to Know","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Water Softener Resins for Iron Removal \u2013 You Need to Know - 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