CN107226567A - A kind of sulfide precipitation method handled for effluent containing heavy metal ions - Google Patents

A kind of sulfide precipitation method handled for effluent containing heavy metal ions Download PDF

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Publication number
CN107226567A
CN107226567A CN201610166864.XA CN201610166864A CN107226567A CN 107226567 A CN107226567 A CN 107226567A CN 201610166864 A CN201610166864 A CN 201610166864A CN 107226567 A CN107226567 A CN 107226567A
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CN
China
Prior art keywords
sulfide
heavy metal
metal ion
effluent
inorganic
Prior art date
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Pending
Application number
CN201610166864.XA
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Chinese (zh)
Inventor
谢洪勇
赵盈利
张利
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Shanghai Second Polytechnic University
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Shanghai Second Polytechnic University
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Publication date
Application filed by Shanghai Second Polytechnic University filed Critical Shanghai Second Polytechnic University
Priority to CN201610166864.XA priority Critical patent/CN107226567A/en
Publication of CN107226567A publication Critical patent/CN107226567A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209Regulation methods for flocculation or precipitation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • C02F2101/22Chromium or chromium compounds, e.g. chromates

Abstract

The invention belongs to technical field of waste water processing, specially a kind of sulfide precipitation method handled for effluent containing heavy metal ions.The temperature of waste water is heated between 30~40 DEG C by it first, and pH value is between 6~8;Then by adding inorganic sulphide to effluent containing heavy metal ions so that heavy metal ion reacts the water insoluble metal sulfide of generation with inorganic sulphide, then stratification realizes wastewater treatment;Wherein:The inorganic sulphide is one or more of in vulcanized sodium, potassium sulfide, calcium sulfide, magnesium sulfide or lithium sulfide;The addition of the inorganic matter is added according to the removal amount of heavy metal ion by the 90-110% of the heavy metal ion in generation metal sulfide and the appropriate mol ratio of sulphur.The present invention has that medicament is cheap and easy to get, adding less, remove technique simple, investment and the low advantage of operating cost, and the clearance of heavy metal ion is up to 99% or more.

Description

A kind of sulfide precipitation method handled for effluent containing heavy metal ions
Technical field
The present invention relates to technical field of waste water processing, specifically, it is related to and a kind of handles for effluent containing heavy metal ions Sulfide precipitation method.
Background technology
The useless of a large amount of metal ions is discharged in the industrial processes such as mining and metallurgy, machine-building, chemical industry, electronics, instrument Water, this waste water is one of serious and big to mankind's harm industrial wastewater of environmental pollution.Metal especially heavy metal is in food Excessive enrichment in thing chain can all cause very big harm to natural environment and health, remove the metal ion tool in waste water It is of great significance.The minimizing technology of metal ion mainly has chemical method, Physical and bioanalysis in waste water.Chemical method leads to Crossing chemical reaction makes in waste water to be changed into water insoluble metallic compound in the metal ion of dissolved state, by filter and point Removed from sediment is made from the aqueous solution.Hydroxide precipitation method is the method for the most frequently used removal of heavy metal ions, is to utilize OH- reacts the precipitate metal hydroxides of generation indissoluble with heavy metal ion.But the solubility product of many number metal hydroxides is normal Number is smaller, and the clearance of metal ion is not high, such as barium hydroxide, calcium hydroxide, silver hydroxide, magnesium hydroxide, manganous hydroxide, hydrogen Nickel oxide etc., hydroxide precipitation method is limited to the clearance of these metal ions.Therefore, exploitation has low solubility product constant Heavy metal compound, efficiently removing the processing method of metal ion in waste water has important practical significance and social benefit.
Sulphide precipitation, is to add inorganic sulphide into metal ion waste water, makes metal ion anti-with sulphion The metal sulfide precipitation of indissoluble should be generated, is then isolated by filtration.Because the solubility product of metal sulfide is significantly less than corresponding Metal hydroxides solubility product, therefore, sulphide precipitation has more advantages than hydroxide precipitation method, such as golden Category ion remaval rate may be up to 99.9%, and sediment weight is few, and sediment metal content is high, is conducive to the recovery of metal.But due to metal from Son is fast with sulphion reaction speed, and sulphide precipitation has sulfide grain size number tiny, separation is difficult, and limit value sulfide sinks The application of shallow lake method.
The metal ion sulfurization-precipitation method of the present invention, by process parameter control, can be such that metal ion is reacted with sulphion Speed is controllable, sulfide grain size number thick, has the advantages that sulfide is easy to precipitation with separating.
The content of the invention
In order to overcome the deficiencies in the prior art, it is used for effluent containing heavy metal ions processing it is an object of the invention to provide one kind Sulfide precipitation method.The method of the present invention can efficiently reduce the content of heavy metal ions in wastewater.
The present invention provides a kind of sulfide precipitation method handled for effluent containing heavy metal ions, and it is first by the temperature of waste water It is heated between 30~40 DEG C, pH value is between 6~8;Then by adding inorganic sulphide to effluent containing heavy metal ions so that Heavy metal ion reacts the water insoluble metal sulfide of generation with inorganic sulphide, carries out wastewater treatment;Wherein:It is described inorganic Sulfide is one or more of in vulcanized sodium, potassium sulfide, calcium sulfide, magnesium sulfide or lithium sulfide;The addition of the inorganic matter The removal amount according to heavy metal ion is measured, by the 90- of heavy metal ion and the appropriate mol ratio of sulphur in generation metal sulfide 110% addition.
In the present invention, pH regulation and control are realized by adding acid or alkali.
In the present invention, the reaction time of heavy metal ion and inorganic sulphide is 2~4h.
In the present invention, the metal ion in the effluent containing heavy metal ions refers to that simple substance density is more than 4500kg/ cubic metres Metallic element such as Ni2+、Cd2+And Pb2+
Compared to the prior art, the beneficial effects of the present invention are:
1) medicament used in is cheap, be easy to get;
2) inorganic sulphide dosage is small, operating cost is low;
3) it is easy to use simple to operate;
4)High content can be handled contains heavy metal ion industrial wastewater, and the clearance of heavy metal ion is up to 99% or more.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited Scope.
Embodiment 1
1) Ni is contained2+Industrial wastewater, its Ni2+Content is 10000mg/L, it is desirable to Ni2+Clearance be 99%.Described is given up Water is passed through in glass fiber reinforced plastic tank, wastewater temperature is adjusted to 40 DEG C, pH value is adjusted to 6.
2)As requested, Ni in waste water2+Removal amount be 9900mg/L, vulcanized sodium is added into glass fiber reinforced plastic tank(Na2S), By generation nickel sulfide(NiS)In Ni2+Ion and sulphur(S-2)The 90% of appropriate ratio adds vulcanized sodium, and the addition of vulcanized sodium is 11850.9mg/L。
3) stood after stirring 1h, after solution layering, supernatant pumps out supernatant to remove the waste water after metal ion Retort.
4)Water outlet Ni2+Concentration be less than 10mg/L.
Embodiment 2
1) Pd is contained2+And Cd2+Industrial wastewater, its Pd2+And Cd2+Content is respectively 65000mg/L and 50000mg/L waste water, It is required that Pd2+Clearance 99.9%, Cd2+Clearance be 99.5%.Described waste water is passed through in glass fiber reinforced plastic tank, by waste water temperature Degree regulation is to 30 DEG C, and pH value is adjusted to 8.
2)As requested, Pd in waste water2+And Cd2+Removal amount be respectively 64935mg/L and 49750mg/L, to fiberglass Potassium sulfide is added in tank(K2S), by generation vulcanized lead(PbS)With vulcanization every(CdS)In Pd2+And Cd2+Ion and sulphur(S-2)Just When than 110% addition potassium sulfide, the addition of potassium sulfide is 126.2g/L.
3) stood after stirring 2h, after solution layering, supernatant pumps out supernatant to remove the waste water after metal ion Retort.
4)Water outlet Pd2+And Cd2+Content is respectively smaller than 65mg/L and 150mg/L.

Claims (4)

1. a kind of sulfide precipitation method handled for effluent containing heavy metal ions, it is characterised in that:It is first by heavy metal ion The temperature of waste water is heated between 30~40 DEG C, and pH value is between 6~8;Then it is inorganic by being added to effluent containing heavy metal ions Sulfide so that heavy metal ion reacts the water insoluble metal sulfide of generation with inorganic sulphide, then stratification is realized Wastewater treatment;Wherein:The inorganic sulphide it is a kind of in vulcanized sodium, potassium sulfide, calcium sulfide, magnesium sulfide or lithium sulfide or It is several;The addition of the inorganic matter is according to the removal amount of heavy metal ion, by the heavy metal ion in generation metal sulfide With sulphur theoretical molar than 90-110% add.
2. sulfide precipitation method according to claim 1, it is characterised in that:The pH values of waste water are entered by acid or alkali Row regulation.
3. sulfide precipitation method according to claim 1, it is characterised in that:The reaction of heavy metal ion and inorganic sulphide Time is 2~4h.
4. sulfide precipitation method according to claim 1, it is characterised in that:Heavy metal in the effluent containing heavy metal ions Ion refers to the metallic element that simple substance density is more than 4500kg/ cubic metres.
CN201610166864.XA 2016-03-23 2016-03-23 A kind of sulfide precipitation method handled for effluent containing heavy metal ions Pending CN107226567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610166864.XA CN107226567A (en) 2016-03-23 2016-03-23 A kind of sulfide precipitation method handled for effluent containing heavy metal ions

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Application Number Priority Date Filing Date Title
CN201610166864.XA CN107226567A (en) 2016-03-23 2016-03-23 A kind of sulfide precipitation method handled for effluent containing heavy metal ions

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109970080A (en) * 2019-04-02 2019-07-05 江苏杰林环保科技有限公司 A kind of heavy metals removal method in chemical industry abraum salt

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101161834A (en) * 2006-10-09 2008-04-16 冯云善 Method for separating mineral from No.11 coal bed acid water
CN102923874A (en) * 2011-08-12 2013-02-13 中国石油化工股份有限公司 Method for processing wastewater containing heavy metal ions
CN104261526A (en) * 2014-09-17 2015-01-07 哈尔滨工业大学深圳研究生院 Treatment method of heavy metal wastewater
CN105236619A (en) * 2015-10-15 2016-01-13 桂林市春晓环保科技有限公司 Method for removing heavy metal ions in water

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101161834A (en) * 2006-10-09 2008-04-16 冯云善 Method for separating mineral from No.11 coal bed acid water
CN102923874A (en) * 2011-08-12 2013-02-13 中国石油化工股份有限公司 Method for processing wastewater containing heavy metal ions
CN104261526A (en) * 2014-09-17 2015-01-07 哈尔滨工业大学深圳研究生院 Treatment method of heavy metal wastewater
CN105236619A (en) * 2015-10-15 2016-01-13 桂林市春晓环保科技有限公司 Method for removing heavy metal ions in water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109970080A (en) * 2019-04-02 2019-07-05 江苏杰林环保科技有限公司 A kind of heavy metals removal method in chemical industry abraum salt

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Application publication date: 20171003

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