SU149354A1 - The method of wastewater treatment of hexavalent chromium - Google Patents
The method of wastewater treatment of hexavalent chromiumInfo
- Publication number
- SU149354A1 SU149354A1 SU647624A SU647624A SU149354A1 SU 149354 A1 SU149354 A1 SU 149354A1 SU 647624 A SU647624 A SU 647624A SU 647624 A SU647624 A SU 647624A SU 149354 A1 SU149354 A1 SU 149354A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- hexavalent chromium
- wastewater treatment
- solution
- naoh
- nacl
- Prior art date
Links
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
- Removal Of Specific Substances (AREA)
Description
Известны способы очистки сточных вод от шестивалентного хрома путем фильтровани через высокоосиовной анионит типа четвертичного аммониевого основани . Однако полной регенерации анионитов не достигают , что уменьшает их обменную емкость.Methods are known for purifying wastewater from hexavalent chromium by filtration through a high-axial anion exchanger of the type of quaternary ammonium base. However, complete regeneration of anion exchangers is not reached, which reduces their exchange capacity.
Предлагаемый способ отличаетс тем, что поглош.ение шестивалентного хрома из воды осуш.ествл ют аниовитом, наход ш.имс в СЬионной форме, а вымывание поглощенных ионов производ т путем последовательной обработки сорбента первоначально раствором NaOH с концентрацией 30 г/л, а затем раствором NaCl, юодержашим 50 г1л соли. Это позвол ет повысить механическую прочность авионита и увеличить полноту извлечени задержанных и-м ионов.The proposed method is characterized in that the hexavalent chromium is absorbed from water by drying with aniovite, found in hydrated form, and the leaching of absorbed ions is carried out by sequential treatment of the sorbent with an initial solution of NaOH with a concentration of 30 g / l and then with a solution NaCl, containing 50 grams of salt. This makes it possible to increase the mechanical strength of avionite and increase the completeness of extraction of retained ions.
Дл перевода аниопита в С1-ионную форму после пропускани через него растворов NaOH и NaCl через аниопит фильтруют 2%-ный раствор сол ной кислоты.To convert the anopit to the C1-ionic form after passing NaOH and NaCl solutions through it, 2% hydrochloric acid is filtered through anopite.
При осуществлении способа очищаемый раствор 1Пропускают через 3-4 последовательно соединенные колонки, наполненные зернистым анионитом АВ-17.When implementing the method, the purified solution 1 Pass through 3-4 successively connected columns, filled with granular anion exchanger AB-17.
После полного насыщени апионита ионами хрома его подвергают регенерации в тех же колонках растворами NaOH и NaCl. При этом достигают 30-40-кратного увеличени концентрации раствора по хрому. Затем восстанавливают анионит 2%-ным растворо.м НС1 до первоначального рабочего состо ни .After the apionite is completely saturated with chromium ions, it is regenerated in the same columns with solutions of NaOH and NaCl. In this case, a 30–40-fold increase in the concentration of the solution in chromium is achieved. The anion exchange resin is then reduced with 2% HCl solution to the initial working state.
Анионит используют многократно.Anion exchangers are used repeatedly.
№ 149354.., -2; «f Пр е д м е Т изобретени No. 149354 .., -2; "F predme t inventions
: 1. Способ очистки сточных вод от шестивалентного хрома путем фильтрований--через высокоосновной анионит типа четвертичного аммониевого основани , -отличающи йс тем, что, с целью усилени механической прочности ащионита и увеличени полноты извлечени задержанных им ионов, поглощение шестивалентного хрома из воды осуществл ют анионитом, наход щимс в С1-:ионной форме, а вымывание поглощенных ионов производ т путем последовательной обработки сорбента первоначально раствором NaOH с концентрацией 30 г/л, а затем раствором NaCl, содержащим 50 г/л соли.: 1. A method for purifying wastewater from hexavalent chromium by filtration through a highly basic quaternary ammonium-type anion exchange resin, distinguished by the fact that, in order to enhance the mechanical strength of agionite and increase the recovery of retained ions, it absorbs hexavalent chromium from water anionite in the C1-: ionic form, and the leaching of absorbed ions is carried out by sequentially treating the sorbent with an initial solution of NaOH with a concentration of 30 g / l, and then with a solution of NaCl containing 5 0 g / l of salt.
2. Способ по п. 1, отличающийс тем, что, с целью перевода анионита в СЬионную форму после пропускани через него растворов NaOH и NaCl, через анионит фильтруют 2%-ный раствор сол ной кислоты2. A method according to claim 1, characterized in that, in order to convert the anion exchanger to the Chionic form after passing NaOH and NaCl solutions through it, a 2% hydrochloric acid solution is filtered through the anion exchanger
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU647624A SU149354A1 (en) | 1959-12-15 | 1959-12-15 | The method of wastewater treatment of hexavalent chromium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU647624A SU149354A1 (en) | 1959-12-15 | 1959-12-15 | The method of wastewater treatment of hexavalent chromium |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792762069A Addition SU819756A2 (en) | 1979-05-03 | 1979-05-03 | Tolerance control device |
Publications (1)
Publication Number | Publication Date |
---|---|
SU149354A1 true SU149354A1 (en) | 1961-11-30 |
Family
ID=48304492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU647624A SU149354A1 (en) | 1959-12-15 | 1959-12-15 | The method of wastewater treatment of hexavalent chromium |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU149354A1 (en) |
-
1959
- 1959-12-15 SU SU647624A patent/SU149354A1/en active
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