SU1691321A1 - Method for purifying effluents from mercury - Google Patents
Method for purifying effluents from mercury Download PDFInfo
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- SU1691321A1 SU1691321A1 SU884633251A SU4633251A SU1691321A1 SU 1691321 A1 SU1691321 A1 SU 1691321A1 SU 884633251 A SU884633251 A SU 884633251A SU 4633251 A SU4633251 A SU 4633251A SU 1691321 A1 SU1691321 A1 SU 1691321A1
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- mercury
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- wastewater
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Abstract
Изобретение относитс к очистке сточных вод от ртути и может быть использовано в производстве щелевых металлов электролизом дл обезвреживани образующихс ртутьсодержащих сточных вод. Целью изобретени вл етс повышение степени очистки воды от ртути. Дл осуществлени способа сточную воду обрабатывают раствором сульфида натри при рН среды 8,5- 9,5, выпаривают, пары воды конденсируют и фильтруют через коксовую крошку, Способ позвол ет снизить остаточное содержание ртути в воде до 0,0005 мг/л. 1 табл.The invention relates to the treatment of wastewater from mercury and can be used in the production of gap metals by electrolysis to dispose of the mercury containing wastewater. The aim of the invention is to increase the degree of water purification from mercury. To carry out the process, waste water is treated with sodium sulfide solution at a pH of 8.5- 9.5, evaporated, the water vapor is condensed and filtered through coke chips. The method reduces the residual mercury content in water to 0.0005 mg / l. 1 tab.
Description
Изобретение относитс к очистке сточных вод от ртути и может быть использовано в производстве щелочных металлов электролизом дл обезвреживани образующихс ртутьсодержащих сточных вод.The invention relates to the treatment of wastewater from mercury and can be used in the production of alkali metals by electrolysis to dispose of the resulting mercury-containing wastewater.
Цель изобретени - повышение степени очистки сточных вод от ртути,The purpose of the invention is to increase the degree of purification of wastewater from mercury,
Пример. Сточную воду, содержащую 12.5 мг/л ртути, 4 г/л гидроксида натри , 60 г/л хлорида натри и до 2 г/л взвеси, осветл ют путем отсто , подкисл ют раствором сол ной кислоты до рН 4 при перемешивании , обрабатывают газообразным хлором с избытком до 100 мг/дм сточной воды и выдерживают в течение 30-40 мин, после чего фильтруют через слой активированного угл . В сточную воду одновременно добавл ют при перемешивании раствор едкого натра до рН 8,5-9,5 и раствор сульфида натри до избытка в воде, равного 5-10 мг/дм3. Обработанную воду выпаривают, пары воды конденсируют и определ ют содержание в них ртути. Концентраци ртути составл ет 0,005 мг/л. Конденсат паров фильтруют через слой коксовой крошки из рассчета 0,06 кг крошки на 1 м очищаемого конденсата. Остаточна концентраци ртути в конденсате составл ет 0,0005 мг/л.Example. Sewage water containing 12.5 mg / l of mercury, 4 g / l of sodium hydroxide, 60 g / l of sodium chloride and up to 2 g / l of suspension, is clarified by suction, acidified with hydrochloric acid solution to pH 4 with stirring, treated with gaseous chlorine with an excess of up to 100 mg / dm of waste water and incubated for 30-40 minutes, then filtered through a layer of activated carbon. With stirring, a solution of sodium hydroxide is added to the wastewater to a pH of 8.5-9.5 and a solution of sodium sulfide to an excess in water of 5-10 mg / dm3. The treated water is evaporated, the water vapor is condensed and their mercury content is determined. The mercury concentration is 0.005 mg / L. The vapor condensate is filtered through a layer of coke chips from the calculation of 0.06 kg of chips per 1 m of condensate to be purified. The residual concentration of mercury in the condensate is 0.0005 mg / L.
Параллельно осуществл ют процесс очистки по известному способу с использованием в качестве реагента гидразина.In parallel, a purification process is carried out by a known method using hydrazine as a reagent.
Сравнительные данные по очистке сточных вод от ртути предлагаемым и известным способами представлены в таблице.Comparative data on the treatment of wastewater from mercury offered and known methods are presented in the table.
Из таблицы следует, что использование в качестве реагента гидросульфида натри и фильтраци конденсата паров воды позвол ет снизить содержание в ней ртути до 0,0005 мг/л.It follows from the table that the use of sodium hydrosulfide as a reagent and filtration of water vapor condensate reduces the content of mercury in it to 0.0005 mg / l.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884633251A SU1691321A1 (en) | 1988-11-28 | 1988-11-28 | Method for purifying effluents from mercury |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884633251A SU1691321A1 (en) | 1988-11-28 | 1988-11-28 | Method for purifying effluents from mercury |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1691321A1 true SU1691321A1 (en) | 1991-11-15 |
Family
ID=21420922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU884633251A SU1691321A1 (en) | 1988-11-28 | 1988-11-28 | Method for purifying effluents from mercury |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1691321A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2731422A1 (en) * | 1995-07-28 | 1996-09-13 | Lyonnaise Eaux Eclairage | Heavy metal removal from liq. waste |
| FR2731421A1 (en) * | 1994-04-29 | 1996-09-13 | Lyonnaise Eaux Eclairage | Heavy metal removal from liq. waste, e.g. water for scrubbing flue gases from incinerators |
-
1988
- 1988-11-28 SU SU884633251A patent/SU1691321A1/en active
Non-Patent Citations (1)
| Title |
|---|
| За вка GB N 1330197, кл. С 02 В 1/04, 1973, * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2731421A1 (en) * | 1994-04-29 | 1996-09-13 | Lyonnaise Eaux Eclairage | Heavy metal removal from liq. waste, e.g. water for scrubbing flue gases from incinerators |
| FR2731422A1 (en) * | 1995-07-28 | 1996-09-13 | Lyonnaise Eaux Eclairage | Heavy metal removal from liq. waste |
| WO1997005068A1 (en) * | 1995-07-28 | 1997-02-13 | Lyonnaise Des Eaux | Method for removing heavy metals from liquid effluents |
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