【Daily Question】Chemical Engineering Principles 353: Anion Resin Contamination (April 1)
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This post was last edited by “Back to Cambridge” on April 8, 2016, at 16:26. Starting today, the Chemical Engineering Theory section is launching the “Question of the Day” activity, aimed at helping everyone reinforce their fundamental knowledge in chemical engineering. Subsequently, series such as “Principles of Chemical Engineering”, “Mass Transfer and Separation”, “Chemical Thermodynamics”, and “Chemical Process Technology” will also be introduced. We hope for your active participation! Wishing you all a Merry Christmas~~ For replies to the “Question of the Day” activity, answers can be viewed directly; however, the thread will be closed after one day! ! To encourage everyone’s continued participation this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer question: Briefly describe the characteristics of anionic resin contamination and the methods for restoring it. Answer: Depending on the degree of contamination of the anionic resin, different revival methods are used or a combination of these methods is applied. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and revival.
Depending on the degree of contamination of the anionic resin, different revival methods are employed or used in combination. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and revival.
Depending on the degree of contamination of the anionic resin, different revival methods are employed or used in combination. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and revival.
Depending on the degree of contamination of the anion resin, different revival methods are employed or used in combination. Due to quality issues with the regenerating agent, iron contamination often occurs, causing the anion resin to turn black. Treatment with 5%–10% hydrochloric acid can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and revival.
Depending on the degree of contamination of the anionic resin, different revival methods are employed or used in combination. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; these resins are usually soaked in a solution containing 10% NaCl and 1% NaOH, with a volume of this solution being at least twice that of the resin volume, in order to revive them
Different revival methods are adopted depending on the degree of contamination of the anion resin. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to darken. A treatment with 5%–10% salt acid can be used. The most common type of contamination affecting anion resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased rinsing time after regeneration, a darker color of the resin, and poorer water quality in the effluent from desalination equipment. For anion resins contaminated by different types of substances, specific screening tests are required to determine the appropriate amounts of sodium chloride and sodium hydroxide. It is common to use a solution containing 10% sodium chloride and 1% sodium hydroxide, in a volume that is twice or more that of the resin, for soaking and rejuvenation purposes
Depending on the degree of contamination of the anionic resin, different revival methods are employed or used in combination. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and reactivation.
Depending on the degree of contamination of the anionic resin, different revival methods are employed or used in combination. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and reactivation.
Depending on the degree of contamination of the anionic resin, different revival methods are employed or used in combination. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and revival.
Answer: Depending on the degree of contamination of the anionic resin, different revival methods are used or a combination of these methods is applied. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and revival.
Depending on the degree of contamination of the anionic resin, different revival methods are employed or used in combination. Due to quality issues with the regenerant, iron contamination often occurs, causing the anion resin to turn black; a 5%–10% hydrochloric acid treatment can be used. The most common type of contamination affecting anionic resins is organic contamination, which is characterized by a decrease in exchange capacity, an increased backwash time after regeneration, a darkening of the resin color, and a deterioration in the quality of water output from the desalination system. For anion resins contaminated by different types of water pollutants, specific screening tests are required to determine the amounts of NaCl and NaOH; it is common to use a solution containing 10% NaCl and 1% NaOH, in a volume at least twice that of the resin, for soaking and reactivation.