SU267500A1 - Method of waste water purification from mercury - Google Patents
Method of waste water purification from mercury Download PDFInfo
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- SU267500A1 SU267500A1 SU681270344A SU1270344A SU267500A1 SU 267500 A1 SU267500 A1 SU 267500A1 SU 681270344 A SU681270344 A SU 681270344A SU 1270344 A SU1270344 A SU 1270344A SU 267500 A1 SU267500 A1 SU 267500A1
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- SU
- USSR - Soviet Union
- Prior art keywords
- mercury
- wastewater
- waste water
- ozone
- water purification
- Prior art date
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- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
Известны способы очистки сточных вод от ртути путем осаждени ее в ви де сульфида или сорбции на ионообмен ных смолах. Однако содержание ртути в сточных водах после такой очистки превьшает санитарную норму. С целью повьпнени степени очистки сточных вод от ртути и переведени металлической ртути в ионную форму предлагаетс сточные воды пред варительно подкисл ть до рН не более 4 и обрабатывать окислителем, например озоном или хлором. Далее ртуть осаждают в виде сульфида или улавливают на ионообменных смолах. Доза окислител составл ет 30-50 мл/ Обработанна таким образом вода содержит ртуть в количестве 0,0010 ,002 мл/г при санитарной норме 0,005 мг/л. Пример 1. Озон получают из кислорода воздуха при напр жении между электродами 16 кВт и скорости , подачи воздуха 1 л/мин. Концентраци озона в озоно-воздушной смеси составл ет 20 мг/л. В производственной сточной воде, вз той дл опытов, содержитс 0,105 мг/л общей ртути и 0,023 мг/л окисленной. Контакт воды с озоном осуществл ют в колонне при распылении озона в воде с помощью пластинки (размер отверстий 100 мк), вмонтированной в дно колонны, высота которой 1,5 м,100%-ное окисление металлической ртути достигаетс при рН 4 и дозе озона около 40-50 мл/л. Окисленную ртуть улавливают на ионообменной смоле в колонне высотой 25 см при скорости прохождени воды 100 мл/ч.Methods are known for purifying wastewater from mercury by precipitating it in the form of sulfide or sorption on ion exchange resins. However, the content of mercury in wastewater after such treatment exceeds the sanitary standard. In order to purify wastewater from mercury and convert metallic mercury to ionic form, it is proposed to acidify the wastewater to a pH of no more than 4 and treat it with an oxidizing agent, such as ozone or chlorine. Further, mercury is precipitated in the form of sulfide or captured on ion exchange resins. The dose of oxidant is 30-50 ml / The water treated in this way contains mercury in an amount of 0.0010, 002 ml / g at a sanitary rate of 0.005 mg / l. Example 1. Ozone is obtained from air oxygen at a voltage between the electrodes of 16 kW and speed, with an air supply of 1 l / min. The ozone concentration in the ozone-air mixture is 20 mg / l. In the industrial wastewater, taken for the experiments, 0.105 mg / l of total mercury and 0.023 mg / l of oxidized water are contained. The water is contacted with ozone in a column by spraying ozone in water using a plate (100 µm hole size) embedded in the bottom of the column, 1.5 m high, 100% oxidation of metallic mercury is achieved at a pH of 4 and the ozone dose is about 40-50 ml / l. The oxidized mercury is trapped on an ion exchange resin in a 25 cm high column at a water flow rate of 100 ml / h.
0,0023 0,0023
0,105 0,0022 0,1050.105 0.0022 0.105
АН-2Ф0,105 0,0011AN-2F0.105 0.0011
Пример 2. Сточные воды (рН 12-13) производства хлора и каустика ртутным способом содержат ртуть: в осадке 10-20 мг/л, в растворе 12 мг/л; количество общей ртути 0,023 мг/л.Example 2. Wastewater (pH 12-13) produced by chlorine and caustic by the mercury method contains mercury: in the sediment 10-20 mg / l, in solution 12 mg / l; the amount of total mercury is 0.023 mg / l.
Осаждение взвесей производ т при рН 8. После 10 мин отстаивани подкислением устанавливают рН, равный 4The sedimentation of the suspension is carried out at a pH of 8. After 10 minutes of settling by acidification, the pH is set to 4
Хлорирование воды ведут при концентрации хлора 30 мг/л. Через 20 мин достигаетс полное окисление металлической ртути. После осаждени ионов ртути трехкратным избытком сульфида натри и фильтровани содержание ртути в сточной воде ниже 0,005 мг/л.Chlorination of water is carried out at a chlorine concentration of 30 mg / l. After 20 minutes, complete oxidation of metallic mercury is achieved. After the precipitation of mercury ions by a threefold excess of sodium sulfide and filtration, the mercury content in the wastewater is below 0.005 mg / l.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU681270344A SU267500A1 (en) | 1968-09-13 | 1968-09-13 | Method of waste water purification from mercury |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU681270344A SU267500A1 (en) | 1968-09-13 | 1968-09-13 | Method of waste water purification from mercury |
Publications (1)
Publication Number | Publication Date |
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SU267500A1 true SU267500A1 (en) | 1981-06-30 |
Family
ID=20443388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU681270344A SU267500A1 (en) | 1968-09-13 | 1968-09-13 | Method of waste water purification from mercury |
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SU (1) | SU267500A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2900074A1 (en) * | 2006-04-24 | 2007-10-26 | Tredi Sa | Treatment of solid wastes e.g. fiber-cement polluted by mercury, useful to fix mercurial species e.g. elemental mercury as sulfur amalgam in solid wastes, comprises oxidization and sulfidation of mercurial species in alkaline medium |
-
1968
- 1968-09-13 SU SU681270344A patent/SU267500A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2900074A1 (en) * | 2006-04-24 | 2007-10-26 | Tredi Sa | Treatment of solid wastes e.g. fiber-cement polluted by mercury, useful to fix mercurial species e.g. elemental mercury as sulfur amalgam in solid wastes, comprises oxidization and sulfidation of mercurial species in alkaline medium |
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