CN103848523A - Method for removing complexing agent of Hg (II) from water by using strengthened manganese oxide - Google Patents
Method for removing complexing agent of Hg (II) from water by using strengthened manganese oxide Download PDFInfo
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- CN103848523A CN103848523A CN201410128711.7A CN201410128711A CN103848523A CN 103848523 A CN103848523 A CN 103848523A CN 201410128711 A CN201410128711 A CN 201410128711A CN 103848523 A CN103848523 A CN 103848523A
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Abstract
The invention discloses a method for removing a complexing agent of Hg (II) from water by using a strengthened manganese oxide, and in particular relates to a strengthened removal method for Hg (II) in water to solve the problem of extremely low removal rate in the existing method for removing the Hg (II). The method comprises the steps of 1, adding a complexing agent A into the water containing Hg (II), then adding an adsorbent B or C, and stirring to obtain a mixed solution; 2, adding a coagulant into the mixed solution, and then sequentially performing coagulation, filtration, precipitation and clarification of a conventional water treatment process. According to the method, by using the complexing agent A, the properties of the adsorbent and Hg can be changed simultaneously, and the trace Hg (II) in a drinking water source can reach the provision of Drinking Water Sanitary Standard (GB5749-2006) when water is discharged from a water plant; by adopting the method disclosed by the invention, the mercury removal efficiency is up to more than 99%; the method is simple, flexible and convenient to operate, does not change the original treatment process of the water plant, and is low in running cost. The method disclosed by the invention is applied in the field of sewage and wastewater treatment.
Description
Technical field
The present invention relates to strengthening and remove the method for Hg (II) in water.
Background technology
Mercury (mercury), is commonly called as " mercury ", and silvery white, has metalluster, is unique metal being in a liquid state under normal temperature.Mercury has very supervirulent pollutent as one to human body and higher organism, is prevalent in occurring in nature.The Mercury In Environment pollution problem being caused by mercury and mercuric compounds is day by day serious, has become large public hazards of environment for human survival.Tap water mercury pollution is mainly the pollution of drinking water source, main path: the discharge of mercury-containing waste water; The unreasonable disposal of mercury-containing wastes and stacking cause mercury to leak; Mercury ore area and mercury pollution be area seriously, is dissolved and washed away the pollution of waterhead causing by rainwater; Caused the release of mercury in river and bottom mud in lake by environment change.Mercury poisoning can cause that abalienation, mucous hyperemia, ulcer, kidney exhaustion, proteinuria, sexual function weaken, woman in menstrual period imbalance or miscarriage and hyperthyroidism etc.China's " drinking water sanitary standard " (GB5749-2006) the ceiling value of regulation Mercury in Drinking Water concentration is 1 μ g/L.Therefore, the method for efficient economy, safety and environmental protection of needing badly is removed mercury in water, solves mercury pollution problem in water.
In recent years, China's mercury pollution is day by day serious, as the ground such as Guizhou, Heilungkiang and Sprite mercury poisoning event etc.Mercury pollution directly causes health of human body to be endangered, serious threat public health security.
Not yet there is proven technique in China to mercury pollution water body at present, common method is to add sulfide to carry out chemical precipitation, but a lot of sulfide is such as hydrogen sulfide, sodium sulphite itself or drop into the serious stink of meeting generation in water, extremely unfavorable to environment, and be used for greatly dirty wastewater treatment, be difficult to thoroughly remove Mercury in Drinking Water.And conventional coagulating agent aluminium salt during up to 40mgAl/L to mercury almost without any removal, simple molysite and Mn oxide are also very low to the removal efficiency of mercury.
Summary of the invention
To the present invention seeks in order solving existingly except the extremely low problem of Hg (II) clearance, and to provide a kind of strengthening Mn oxide to remove the method for the complexing agent of Hg (II) in water.
A kind of strengthening Mn oxide of the present invention is removed the method for the complexing agent of Hg (II) in water, realize according to the following steps: one, to adding complexing agent containing in Hg (II) water, add again sorbent material, then with speed stirring reaction 1～60min of 100～350r/min, obtain mixing solutions; Two,, to dosing coagulant in step 1 gained mixing solutions, then successively after conventional water treatment process coagulation, filtration, precipitation and clarification, complete strengthening Mn oxide and remove the complexing agent of Hg (II) in water;
The wherein mol ratio 2～10000: 1 of complexing agent and Hg in step 1; Sorbent material dosage is counted 1～50mg/L with manganese; In step 2, the dosage of coagulating agent is 10mg/L.
The present invention comprises following beneficial effect:
The present invention utilizes Sulfothiorine as complexing agent, and this complexing agent is nontoxic, safety, can change the current potential character of mercury in water, makes uncharged mercury electronegative, can also generate divalence Mn2+ simultaneously and be attracted to the removal that increases mercury on sorbent material as positively charged ion bridge.Remaining mercury concentration can guarantee that in drinking water source, micro-Hg (II) reaches " drinking water sanitary standard " regulation (GB5749-2006) in the time of water factory's water outlet, and mercury concentration is lower than 1 μ g/L.This technique removal of mercury efficiency is high, technique is simple, flexible and convenient operation, do not change the original treatment process of water factory and running cost low, can be used for conventional processing and the emergency processing of mercury pollution in water.
The present invention strengthens Mn oxide and thoroughly removes the complexing agent of Hg in water (II), and the clearance that Hg (II) is removed in strengthening reaches more than 99%.
Accompanying drawing explanation
Fig. 1 is the design sketch of removing Hg in water (II) in embodiment 2, and wherein ▽ represents clearance, ● represent mercury concentration.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the one strengthening Mn oxide of present embodiment is removed the method for the complexing agent of Hg (II) in water, realize according to the following steps: one, to adding complexing agent containing in Hg (II) water, add again sorbent material, then with speed stirring reaction 1～60min of 100～350r/min, obtain mixing solutions; Two,, to dosing coagulant in step 1 gained mixing solutions, then successively after conventional water treatment process coagulation, filtration, precipitation and clarification, complete strengthening Mn oxide and remove the complexing agent of Hg (II) in water;
The wherein mol ratio 2～10000: 1 of complexing agent and Hg in step 1; Sorbent material dosage is counted 1～50mg/L with manganese; In step 2, the dosage of coagulating agent is 10mg/L.
Embodiment two: present embodiment is different from embodiment one: the complexing agent described in step 1 is Sulfothiorine.Other step and parameter are identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one or two: the sorbent material described in step 1 is nascent state ferrimanganic or nanometer nascent state manganese.Nascent state ferrimanganic preparation method is permanganate oxidation ferrous sulfate or iron protochloride gained solid matter; The solid matter that nanometer nascent state manganese preparation method obtains for permanganate oxidation manganous sulfate, Manganous chloride tetrahydrate, Sulfothiorine or S-WAT.Other step and parameter are identical with embodiment one or two.
Embodiment four: present embodiment is different from one of embodiment one to three: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～9000: 1, sorbent material dosage is counted 1～45mg/L with manganese.Other step and parameter are identical with one of embodiment one to three.
Embodiment five: present embodiment is different from one of embodiment one to four: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～8000: 1, sorbent material dosage is counted 1～40mg/L with manganese.Other step and parameter are identical with one of embodiment one to four.
Embodiment six: present embodiment is different from one of embodiment one to five: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～6000: 1, sorbent material dosage is counted 1～30mg/L with manganese.Other step and parameter are identical with one of embodiment one to five.
Embodiment seven: present embodiment is different from one of embodiment one to six: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～5000: 1, sorbent material dosage is counted 1～30mg/L with manganese.Other step and parameter are identical with one of embodiment one to six.
Embodiment eight: present embodiment is different from one of embodiment one to seven: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～3000: 1, sorbent material dosage is counted 1～25mg/L with manganese.Other step and parameter are identical with one of embodiment one to seven.
Embodiment nine: present embodiment is different from one of embodiment one to eight: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～2000: 1, sorbent material dosage is counted 1～20mg/L with manganese.Other step and parameter are identical with one of embodiment one to eight.
Embodiment ten: present embodiment is different from one of embodiment one to nine: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～1000: 1, sorbent material dosage is counted 1～20mg/L with manganese.Other step and parameter are identical with one of embodiment one to nine.
Embodiment 11: present embodiment is different from one of embodiment one to ten: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～800: 1, sorbent material dosage is counted 1～15mg/L with manganese.Other step and parameter are identical with one of embodiment one to ten.
Embodiment 12: present embodiment is different from one of embodiment one to 11: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～600: 1, sorbent material dosage is counted 1～15mg/L with manganese.Other step and parameter are identical with one of embodiment one to 11.
Embodiment 13: present embodiment is different from one of embodiment one to 12: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～500: 1, sorbent material dosage is counted 1～10mg/L with manganese.Other step and parameter are identical with one of embodiment one to 12.
Embodiment 14: present embodiment is different from one of embodiment one to 13: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 100～400: 1, sorbent material dosage is counted 1～8mg/L with manganese.Other step and parameter are identical with one of embodiment one to 13.
Embodiment 15: present embodiment is different from one of embodiment one to 14: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 200～400: 1, sorbent material dosage is counted 2～6mg/L with manganese.Other step and parameter are identical with one of embodiment one to 14.
Embodiment 16: present embodiment is different from one of embodiment one to 15: in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 300: 1, sorbent material dosage is counted 4mg/L with manganese.Other step and parameter are identical with one of embodiment one to 15.
Embodiment 17: present embodiment is different from one of embodiment one to 16: with speed stirring reaction 2～30min of 120～300r/min, obtain mixing solutions in step 1.Other step and parameter are identical with one of embodiment one to 16.
Embodiment 18: present embodiment is different from one of embodiment one to 17: with the speed stirring reaction 15min of 250r/min, obtain mixing solutions in step 1.Other step and parameter are identical with one of embodiment one to 17.
Embodiment 19: present embodiment is different from one of embodiment one to 18: in step 2, coagulating agent is Tai-Ace S 150, polymerize aluminum chloride, iron(ic) chloride or ferric sulfate.Other step and parameter are identical with one of embodiment one to 18.
Embodiment 20: present embodiment is different from one of embodiment one to 19: in step 1, nascent state ferrimanganic is permanganate oxidation ferrous sulfate or iron protochloride gained solid matter; Nanometer nascent state manganese is permanganate oxidation manganous sulfate, Manganous chloride tetrahydrate, Sulfothiorine or S-WAT gained solid matter.Other step and parameter are identical with one of embodiment one to 19.
Verify beneficial effect of the present invention by following examples:
Embodiment 1:
The one strengthening Mn oxide of the present embodiment is removed the method for the complexing agent of Hg (II) in water, realize according to the following steps: one, to adding complexing agent A containing in Hg (II) water, add again adsorbent B, then with the speed stirring reaction 40min of 250r/min, obtain mixing solutions; Two,, to dosing coagulant in step 1 gained mixing solutions, then successively after conventional water treatment process coagulation, filtration, precipitation and clarification, complete original position and generate nascent state nano-manganese dioxide and thoroughly remove Hg in water (II);
Wherein in step 1, the mol ratio of complexing agent A and Hg is 300: 1, and sorbent material dosage is counted 4mg/L with manganese; In step 1, complexing agent A is Sulfothiorine, and adsorbent B is nascent state ferrimanganic; In step 2, the dosage of coagulating agent is 10mg/L.
Adsorbent B described in the present embodiment is the solid matter of nascent state ferrimanganic.
The present embodiment step 1 is 30 μ g/L containing the content of Hg (II) in Hg (II) water; In step 2, coagulating agent is polymerize aluminum chloride.
The present embodiment situ generates nascent state nano-manganese dioxide and thoroughly removes Hg in water (II), and after testing, the efficiency of removing Hg (II) in water is 99.9%.
Embodiment 2:
The one strengthening Mn oxide of the present embodiment is removed the method for the complexing agent of Hg (II) in water, realize according to the following steps: one, to containing complexing agent A in Hg (II) water, add again sorbent material C, then, with the speed stirring reaction 15min of 250r/min, obtain mixing solutions; Two,, to dosing coagulant in step 1 gained mixing solutions, then successively after conventional water treatment process coagulation, filtration, precipitation and clarification, complete original position and generate nascent state nano-manganese dioxide and thoroughly remove Hg in water (II);
Wherein in step 1, the mol ratio of complexing agent A and Hg is 300: 1, and sorbent material dosage is counted 4mg/L with manganese; In step 1, complexing agent A is Sulfothiorine, and sorbent material C is nascent state manganese; In step 2, the dosage of coagulating agent is 10mg/L.
The present embodiment step 1 is 30 μ g/L containing the content of Hg (II) in Hg (II) water; In step 2, coagulating agent is polymerize aluminum chloride.
Adsorbent B described in the present embodiment is the solid matter of nascent state manganese.
The present embodiment situ generates nascent state nano-manganese dioxide and thoroughly removes Hg in water (II), and after testing, as shown in Figure 1, the efficiency of removing as seen Hg in water (II) is 99.99% to result, and mercury residual concentration is lower than 1 μ g/L.
Claims (10)
1. the method for the complexing agent of Hg (II) in a strengthening Mn oxide removal water, it is characterized in that strengthening Mn oxide thoroughly removes the method for Hg in water (II) and realizes according to the following steps: one, to adding complexing agent containing in Hg (II) water, add again sorbent material, then with speed stirring reaction 1～60min of 100～350r/min, obtain mixing solutions; Two,, to dosing coagulant in step 1 gained mixing solutions, then successively after conventional water treatment process coagulation, filtration, precipitation and clarification, complete strengthening Mn oxide and remove the complexing agent of Hg (II) in water;
The wherein mol ratio 2～10000: 1 of complexing agent and Hg in step 1; Sorbent material dosage is counted 1～50mg/L with manganese; In step 2, the dosage of coagulating agent is 10mg/L.
2. a kind of strengthening Mn oxide according to claim 1 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that the complexing agent described in step 1 is Sulfothiorine.
3. a kind of strengthening Mn oxide according to claim 1 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that the sorbent material described in step 1 is nascent state ferrimanganic or nanometer nascent state manganese.
4. a kind of strengthening Mn oxide according to claim 1 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～5000: 1, sorbent material dosage is counted 1～30mg/L with manganese.
5. a kind of strengthening Mn oxide according to claim 4 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～1000: 1, sorbent material dosage is counted 1～20mg/L with manganese.
6. a kind of strengthening Mn oxide according to claim 5 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that in step 1, complexing agent is Sulfothiorine, Sulfothiorine and Hg mol ratio 10～500: 1, sorbent material dosage is counted 1～10mg/L with manganese.
7. a kind of strengthening Mn oxide according to claim 1 and 2 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that the speed stirring reaction 2～30min with 120～300r/min in step 1, obtains mixing solutions.
8. a kind of strengthening Mn oxide according to claim 1 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that the speed stirring reaction 15min with 250r/min in step 1, obtains mixing solutions.
9. a kind of strengthening Mn oxide according to claim 1 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that in step 1, nascent state ferrimanganic is permanganate oxidation ferrous sulfate or iron protochloride gained solid matter; Nanometer nascent state manganese is permanganate oxidation manganous sulfate, Manganous chloride tetrahydrate, Sulfothiorine or S-WAT gained solid matter.
10. a kind of strengthening Mn oxide according to claim 1 is removed the method for the complexing agent of Hg (II) in water, it is characterized in that in step 2, coagulating agent is Tai-Ace S 150, polymerize aluminum chloride, iron(ic) chloride or ferric sulfate.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107265590A (en) * | 2017-07-18 | 2017-10-20 | 上海理工大学 | A kind of medicament and its method for removing heavy metal out of electroplating wastewater complex compound |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102502915A (en) * | 2011-12-31 | 2012-06-20 | 哈尔滨工业大学 | Method for thoroughly removing Hg(II) in water by virtue of in situ generation of new ecological nano manganese dioxide |
| CN103249814A (en) * | 2010-11-19 | 2013-08-14 | 雪佛龙美国公司 | Process, method, and system for removing heavy metals from fluids |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103249814A (en) * | 2010-11-19 | 2013-08-14 | 雪佛龙美国公司 | Process, method, and system for removing heavy metals from fluids |
| CN102502915A (en) * | 2011-12-31 | 2012-06-20 | 哈尔滨工业大学 | Method for thoroughly removing Hg(II) in water by virtue of in situ generation of new ecological nano manganese dioxide |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265590A (en) * | 2017-07-18 | 2017-10-20 | 上海理工大学 | A kind of medicament and its method for removing heavy metal out of electroplating wastewater complex compound |
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