CN1506329A - Treating process of underground water with high arsenic content - Google Patents
Treating process of underground water with high arsenic content Download PDFInfo
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- CN1506329A CN1506329A CNA02155224XA CN02155224A CN1506329A CN 1506329 A CN1506329 A CN 1506329A CN A02155224X A CNA02155224X A CN A02155224XA CN 02155224 A CN02155224 A CN 02155224A CN 1506329 A CN1506329 A CN 1506329A
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Abstract
The present invention is treating process and apparatus of underground water with high concentration of humic substance and high arsenic content. The treating process combines ozone oxidation to oxidize hard-to-treat three-valent arsenic into eary-to-treat five-valent arsenic and to oxidize humic substance into small molecular organic matter; degradation and adsorption of humic substance oxidizing product with bioactive carbon; and the final complete elimination of five-valent arsenic with efficient arsenic eliminating adsorbent. The said process has high arsenic eliminating effect and long adsorbent use life before regeneration, and can treat underground water with high concentration of humic substance and high arsenic content to reach safe drinking water standard at high efficiency and low cost.
Description
Technical field
What the present invention relates to is the treatment process that contains the high-arsenic underground water of high density soil ulmin.
Background technology
Arsenic is carcinogenic, the mutagenesis factor, and animal is also had teratogenesis." drinking water sanitary standard " regulation arsenic concentration surpasses 0.05mg/L and classifies superstandard drinking water as.Trivalent arsenic content is higher in the high-arsenic underground water of China, and generally contain with the humic substance is the organic pollutant of representative, the soil ulmin that exists with anionic form in the high-arsenic underground water disturbs to the removal of arsenic, and trivalent arsenic also is difficult to remove, thereby the removal effect of arsenic is greatly diminished.
At present, the arsenic removal common method of drinking water both at home and abroad has the precipitator method, absorption method.The precipitator method utilize molysite, aluminium salt, sulfide and lime and arsenic to form the insoluble compound arsenic removal, experimental result shows that the effect of removing arsenic of molysite is apparently higher than aluminium salt, iron(ic) chloride (v) has very high clearance to the As in the water, but iron(ic) chloride generally has only 50%-60% to the clearance of As (III), can not effectively remove As (III), in addition, the sludge treatment of post precipitation also is an a great problem; Absorption method mainly comprises activated alumina method, zeolite and rare earth class absorption method, wherein, the arsenic removal capacity and the arsenic removal efficient of activated alumina and rare earth class sorbent material slightly are better than other sorbent material, but simple filtration certainly will lose the function of arsenic removal very soon because of the competitive adsorption of soil ulmin organic pollutant, causes that the sorbent material consumption is big, regeneration is frequent, cost is higher.And, though better to the removal effect of pentavalent arsenic, still can not effectively remove As (III).
Summary of the invention
The objective of the invention is all can not effectively remove the shortcoming of As (III) in order to overcome above-mentioned treatment process, thereby a kind of employing oxidation trivalent arsenic is provided, removes soil ulmin and adsorbents adsorb process combined treatment process, reach the low-cost purpose that purifies high arsenic underground drinking water.
The object of the present invention is achieved like this: adopt ozone Oxidation Treatment, big and unmanageable trivalent arsenic is oxidized to tractable pentavalent arsenic with toxicity, simultaneously soil ulmin is oxidized to small organic molecule, utilize biological activated carbon the soil ulmin oxidation products is degraded and to adsorb then, at last, utilize high-efficient arsenic-removing sorbent that pentavalent arsenic is removed fully.This inventive method comprises following steps: at first, the high-arsenic underground water that will contain the high density soil ulmin carries out ozone Oxidation Treatment; Then, remove small organic molecule by degraded of biological activated carbon device or absorption again; At last, adopt efficient adsorption tower to remove pentavalent arsenic.
Described gac comprises: granular active fruit shell carbon, carbo lignius.
Described sorbent material comprises: rare earth class sorbent material, activated alumina, zeolite.
The device that the inventive method is used as shown in Figure 1, mainly comprises: ozone oxidation reaction device, biological activated carbon treatment unit, arsenic removal adsorption tower; Wherein, by an intake pump water is injected the ozone oxidation reaction device, after 30 minutes, the biological activated carbon treatment unit of will the water after peroxidation flowing through is again degraded and adsorption treatment is fallen small organic molecule, and is last, remove pentavalent arsenic by the arsenic removal adsorption tower, obtain standard compliant tap water, all connect with PVC hard water pipe, valve between the device, interface is adopted hard sealing.
Advantage of the present invention is: (1) is adopted the ozone Oxidation Treatment step big and unmanageable trivalent arsenic is oxidized to tractable pentavalent arsenic with toxicity, solved the difficult problem that trivalent arsenic can't effectively be removed; (2) utilize biological activated carbon the soil ulmin oxidation products is degraded and to adsorb earlier, improved the removal effect of arsenic-removing adsorption agent greatly, and reduced the sorbent material consumption, reduced regeneration times, realize the low-cost high-efficiency arsenic removal arsenic.
In sum, technology and devices such as the integrated ozone oxidation of the present invention, biological activated carbon degraded absorption and the efficient absorption of sorbent material, the handling problem that has solved the high-arsenic underground water that contains the high density soil ulmin can be obtained the fine safe drinking water with lower cost.
Description of drawings
Fig. 1. high-arsenic underground water treatment unit figure of the present invention
Fig. 2. the arsenic removal break-through curve of the embodiment of the invention
Embodiment
Embodiment:
The high-arsenic underground water that present embodiment adopts the only several Liang Xiang in Huhehaote City, China Inner Mongol to contain the high density soil ulmin experimentizes.Raw water quality is: total arsenic is 1.2mg/L, and pH is 7.5-7.8, and wherein trivalent arsenic accounts for 70%, and pentavalent arsenic accounts for 30%, and total organic carbon TOC is 12.3mg/l.By intake pump water is injected the ozone oxidation reaction device, stop after 30 minutes, process shell granular carbon treatment unit is degraded and adsorbed again, and is last, carries out adsorption treatment through the adsorption tower that rare earth ferriferous oxide sorbent material is housed.Experimental result such as table 1, shown in Figure 2:
Table 1 (unit: mg/L)
| Water quality | Total arsenic | Trivalent arsenic | Pentavalent arsenic | ????TOC |
| Former water | ????1.21 | ????0.84 | ????0.36 | ????12.3 |
| Catalyzed oxidation | ????1.15 | ????0.02 | ????1.13 | ????11.2 |
| Charcoal absorption | ????1.10 | ????0.01 | ????1.09 | ????0.81 |
As shown in Table 1, the high-arsenic underground water that is subjected to Organic pollutants is after ozone oxidation, and arsenious content reduces to 1.7% in total arsenic, and the content of pentavalent arsenic rises to 98.3%; After degraded of shell granular carbon treatment unit and absorption, the content of total organic carbon TOC drops to 0.81mg/l; After adsorption tower absorption.
As shown in Figure 2,2000 times do not pick arsenic below the column volume, and 5000 times of following water outlets of column volume reach the national security drinking water standard, and the content of arsenic is less than 0.05mg/L in the water; And carrying out adsorption treatment with rare earth ferriferous oxide sorbent material merely, the following 1500 times of column volumes of similarity condition promptly penetrate (arsenic content is greater than 0.05mg/L).
Claims (3)
1. the arsenic removal treatment process of a high arsenic underground drinking water, this method comprises following steps:
(1) high-arsenic underground water that will contain the high density soil ulmin carries out ozone Oxidation Treatment, and big and unmanageable trivalent arsenic is oxidized to tractable pentavalent arsenic with toxicity, simultaneously soil ulmin is oxidized to small organic molecule;
(2) remove small organic molecule with biological activated carbon degraded or absorption;
(3) remove pentavalent arsenic with high-efficient arsenic-removing sorbent, obtain satisfactory tap water.
2. the arsenic removal treatment process of the described a kind of high arsenic underground drinking water of claim 1, its feature also is: biological activated carbon comprises: granular active fruit shell carbon, carbo lignius.
3. the arsenic removal treatment process of the described a kind of high arsenic underground drinking water of claim 1, its feature also is: sorbent material used in the adsorption tower comprises: rare earth class sorbent material, activated alumina, zeolite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02155224 CN1219711C (en) | 2002-12-10 | 2002-12-10 | Treating process of underground water with high arsenic content |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02155224 CN1219711C (en) | 2002-12-10 | 2002-12-10 | Treating process of underground water with high arsenic content |
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| CN1506329A true CN1506329A (en) | 2004-06-23 |
| CN1219711C CN1219711C (en) | 2005-09-21 |
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| CN 02155224 Expired - Lifetime CN1219711C (en) | 2002-12-10 | 2002-12-10 | Treating process of underground water with high arsenic content |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100579648C (en) * | 2006-12-20 | 2010-01-13 | 中国科学院生态环境研究中心 | Process for preparing As-dispelling sorbent for sea-changed red mud porcelain granule and application method thereof |
| CN101176840B (en) * | 2006-11-09 | 2010-04-07 | 中国科学院生态环境研究中心 | Application method of iron modified red mud arsenic-removing adsorption agent |
| CN101851021A (en) * | 2010-03-23 | 2010-10-06 | 中国地质大学（武汉） | Regulating and controlling method of underground water oxidation environment |
| CN102583698A (en) * | 2012-04-01 | 2012-07-18 | 南京大学 | Oxidation-adsorption integral arsenic removal device and method for drinking water |
| CN102583632A (en) * | 2012-04-01 | 2012-07-18 | 南京大学 | Device and method for removing heavy metal out of water |
| CN102633346A (en) * | 2012-05-07 | 2012-08-15 | 哈尔滨工程大学 | Method for removing arsenic in water by utilizing O3 and activated carbon |
| CN104016435A (en) * | 2014-05-30 | 2014-09-03 | 哈尔滨工程大学 | Method for adsorption and removal of pentavalent inorganic arsenic in water |
| CN105521768A (en) * | 2016-01-13 | 2016-04-27 | 福建汉祥纺织科技有限公司 | Drinking water purifying agent with arsenic removing function and preparation method thereof |
| CN107890772A (en) * | 2017-11-29 | 2018-04-10 | 安徽工业大学 | A kind of adsorption tower and its arsenic removing method for flue gas dearsenification |
| CN110143661A (en) * | 2019-05-23 | 2019-08-20 | 华中科技大学 | A method of arsenic in rich calcium high-arsenic underground water is removed with charcoal |
| CN110540317A (en) * | 2019-08-16 | 2019-12-06 | 上海电力大学 | Method for separating and recycling acid waste water containing arsenic and nickel |
-
2002
- 2002-12-10 CN CN 02155224 patent/CN1219711C/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101176840B (en) * | 2006-11-09 | 2010-04-07 | 中国科学院生态环境研究中心 | Application method of iron modified red mud arsenic-removing adsorption agent |
| CN100579648C (en) * | 2006-12-20 | 2010-01-13 | 中国科学院生态环境研究中心 | Process for preparing As-dispelling sorbent for sea-changed red mud porcelain granule and application method thereof |
| CN101851021B (en) * | 2010-03-23 | 2013-02-13 | 中国地质大学（武汉） | Regulating and controlling method of underground water oxidation environment |
| CN101851021A (en) * | 2010-03-23 | 2010-10-06 | 中国地质大学（武汉） | Regulating and controlling method of underground water oxidation environment |
| CN102583698A (en) * | 2012-04-01 | 2012-07-18 | 南京大学 | Oxidation-adsorption integral arsenic removal device and method for drinking water |
| CN102583632A (en) * | 2012-04-01 | 2012-07-18 | 南京大学 | Device and method for removing heavy metal out of water |
| CN102633346A (en) * | 2012-05-07 | 2012-08-15 | 哈尔滨工程大学 | Method for removing arsenic in water by utilizing O3 and activated carbon |
| CN104016435A (en) * | 2014-05-30 | 2014-09-03 | 哈尔滨工程大学 | Method for adsorption and removal of pentavalent inorganic arsenic in water |
| CN104016435B (en) * | 2014-05-30 | 2016-01-27 | 哈尔滨工程大学 | The method of pentavalent inorganic arsenic in Adsorption water |
| CN105521768A (en) * | 2016-01-13 | 2016-04-27 | 福建汉祥纺织科技有限公司 | Drinking water purifying agent with arsenic removing function and preparation method thereof |
| CN107890772A (en) * | 2017-11-29 | 2018-04-10 | 安徽工业大学 | A kind of adsorption tower and its arsenic removing method for flue gas dearsenification |
| CN110143661A (en) * | 2019-05-23 | 2019-08-20 | 华中科技大学 | A method of arsenic in rich calcium high-arsenic underground water is removed with charcoal |
| CN110540317A (en) * | 2019-08-16 | 2019-12-06 | 上海电力大学 | Method for separating and recycling acid waste water containing arsenic and nickel |
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| Publication number | Publication date |
|---|---|
| CN1219711C (en) | 2005-09-21 |
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