CN103482751A - Application of biodegradable chelating agent EDDS (Ethylenediaminedisuccinic Acid) to treatment on non-degradable organic wastewater - Google Patents
Application of biodegradable chelating agent EDDS (Ethylenediaminedisuccinic Acid) to treatment on non-degradable organic wastewater Download PDFInfo
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- VKZRWSNIWNFCIQ-WDSKDSINSA-N (2s)-2-[2-[[(1s)-1,2-dicarboxyethyl]amino]ethylamino]butanedioic acid Chemical compound OC(=O)C[C@@H](C(O)=O)NCCN[C@H](C(O)=O)CC(O)=O VKZRWSNIWNFCIQ-WDSKDSINSA-N 0.000 title claims abstract description 29
- 239000002351 wastewater Substances 0.000 title claims abstract description 26
- 239000002738 chelating agent Substances 0.000 title abstract description 14
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 25
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims abstract description 6
- 238000006731 degradation reaction Methods 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000003352 sequestering agent Substances 0.000 claims 3
- 239000012467 final product Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 20
- 230000003647 oxidation Effects 0.000 abstract description 12
- 238000007254 oxidation reaction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 43
- 229910052742 iron Inorganic materials 0.000 description 12
- -1 iron ions Chemical class 0.000 description 10
- WXNZTHHGJRFXKQ-UHFFFAOYSA-N 4-chlorophenol Chemical compound OC1=CC=C(Cl)C=C1 WXNZTHHGJRFXKQ-UHFFFAOYSA-N 0.000 description 6
- 238000004043 dyeing Methods 0.000 description 5
- 239000000149 chemical water pollutant Substances 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- 239000012028 Fenton's reagent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- MGZTXXNFBIUONY-UHFFFAOYSA-N hydrogen peroxide;iron(2+);sulfuric acid Chemical compound [Fe+2].OO.OS(O)(=O)=O MGZTXXNFBIUONY-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 2
- 229940012189 methyl orange Drugs 0.000 description 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 241001446247 uncultured actinomycete Species 0.000 description 1
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
本发明提供了生物可降解螯合剂EDDS在处理难降解有机废水中的应用，具体为：包括以下步骤：在难降解有机废水中加入生物可降解螯合剂EDDS和亚铁盐，调pH至7以下，再加入双氧水，反应，即可。本发明利用生物可降解螯合剂EDDS改进芬顿/类芬顿氧化法处理难降解有机废水，利用生物可降解螯合剂EDDS可控制双氧水降解率和同时络合Fe2+、Fe3+，不仅大大提高了双氧水的利用率，降低了亚铁盐的用量，拓宽了芬顿/类芬顿氧化法在水处理中的应用，而且大大增强了芬顿/类芬顿氧化法处理污水的效果。The invention provides the application of the biodegradable chelating agent EDDS in the treatment of refractory organic wastewater, which specifically includes the following steps: adding the biodegradable chelating agent EDDS and ferrous salt to the refractory organic wastewater, and adjusting the pH to below 7 , then add hydrogen peroxide, and react. In the present invention, the biodegradable chelating agent EDDS is used to improve the Fenton/Fenton-like oxidation method to treat refractory organic wastewater, and the biodegradable chelating agent EDDS can control the degradation rate of hydrogen peroxide and simultaneously complex Fe 2+ and Fe 3+ , which not only greatly The utilization rate of hydrogen peroxide is improved, the amount of ferrous salt is reduced, the application of Fenton/Fenton-like oxidation method in water treatment is broadened, and the effect of Fenton/Fenton-like oxidation method for treating sewage is greatly enhanced.
Description
技术领域technical field
本发明属于废水处理领域，特别涉及生物可降解螯合剂EDDS在处理难降解有机废水中的应用，更具体的涉及生物可降解螯合剂EDDS在改进芬顿/类芬顿氧化法处理难降解有机废水中的应用。The invention belongs to the field of wastewater treatment, in particular to the application of biodegradable chelating agent EDDS in the treatment of refractory organic wastewater, and more specifically to the application of biodegradable chelating agent EDDS in the treatment of refractory organic wastewater by improving Fenton/Fenton-like oxidation method in the application.
背景技术Background technique
Fenton（芬顿）是为数不多的以人名命名的无机化学反应之一。1893年，化学家Fenton HJ发现，过氧化氢与二价铁离子的混合溶液具有强氧化性，可以将当时很多已知的有机化合物如羧酸、醇、酯类氧化为无机态，氧化效果十分显著。但此后半个多世纪中，这种氧化性试剂却因为氧化性极强没有被太多重视。但进入20世纪70年代，芬顿试剂在环境化学中找到了它的位置，具有去除难降解有机污染物的高能力的芬顿试剂，在印染废水、含油废水、含酚废水、焦化废水、含硝基苯废水、二苯胺废水等废水处理中体现了很广泛的应用。Fenton is one of the few inorganic chemical reactions named after a person. In 1893, the chemist Fenton HJ discovered that the mixed solution of hydrogen peroxide and ferrous ions has strong oxidizing properties, and can oxidize many known organic compounds such as carboxylic acids, alcohols, and esters to inorganic states at that time, and the oxidation effect is very good. significantly. However, for more than half a century since then, this oxidizing agent has not received much attention because of its strong oxidizing properties. But in the 1970s, Fenton's reagent found its place in environmental chemistry. Fenton's reagent, which has a high ability to remove refractory organic pollutants, was used in printing and dyeing wastewater, oily wastewater, phenolic wastewater, coking wastewater, and It has been widely used in the treatment of wastewater such as nitrobenzene wastewater and diphenylamine wastewater.
经过人们不断的研究，发现芬顿反应的实质是Fe2+与H2O2的链反应催化生成氧化性很强的OH·。在废水处理中主要是利用生成的OH·的强氧化性，从而把难生物降解的污染物降解为分子量小的有机酸或进一步氧化成二氧化碳和水等无毒物质。After continuous research, it is found that the essence of the Fenton reaction is the chain reaction of Fe 2+ and H 2 O 2 catalyzed to generate OH· with strong oxidation. In wastewater treatment, the strong oxidizing properties of the generated OH are mainly used to degrade the refractory biodegradable pollutants into organic acids with small molecular weight or further oxidize them into non-toxic substances such as carbon dioxide and water.
芬顿体系总体上被分为两种反应，其一是芬顿反应，即二价铁与过氧化氢产生羟基自由基进而氧化降解有机物，反应如下：The Fenton system is generally divided into two reactions, one is the Fenton reaction, that is, ferrous iron and hydrogen peroxide produce hydroxyl radicals and then oxidize and degrade organic matter. The reaction is as follows:
Fe2++H2O2→Fe3++HO-+HO· (1)Fe 2+ +H 2 O 2 →Fe 3+ +HO - +HO (1)
HO·+RH→R·+H2O (2)HO·+RH→R·+H 2 O (2)
R·+Fe3+→R++Fe2+ (3)R+Fe 3+ →R + +Fe 2+ (3)
HO·+Fe2+→HO-+Fe3+ (4)HO·+Fe 2+ →HO - +Fe 3+ (4)
在反应过程中，生成的三价铁可以重新再生成二价铁。During the reaction, the generated ferric iron can be regenerated into ferrous iron.
其二是类芬顿反应，即三价铁与过氧化氢引发的一系列反应，反应如下：The second is the Fenton-like reaction, that is, a series of reactions triggered by ferric iron and hydrogen peroxide, the reactions are as follows:
Fe3++H2O2→Fe···OOH2++H+ (5)Fe 3+ +H 2 O 2 →Fe···OOH 2+ +H + (5)
Fe···OOH2+→Fe2++HO2· (6)Fe···OOH 2+ →Fe 2+ +HO 2 (6)
Fe2++H2O2→Fe3++HO-+HO· (1)Fe 2+ +H 2 O 2 →Fe 3+ +HO - +HO (1)
HO·+RH→R·+H2O (2)HO·+RH→R·+H 2 O (2)
芬顿氧化法具有反应速度快，室温下即可快速降解污染物以及可以自动絮凝等优势，但同时也有着一些局限性：The Fenton oxidation method has the advantages of fast reaction speed, rapid degradation of pollutants at room temperature, and automatic flocculation, but it also has some limitations:
其一，在芬顿体系中，整个反应的关键是Fe3+和Fe2+循环的这一过程，由于该反应的速率常数很低，使反应过程中铁离子的循环受阻，体系中铁离子将以Fe3+的形式积累，在中性条件下易产生沉淀，因此反应一般需要在酸性条件，一般pH控制在3.0左右；First, in the Fenton system, the key to the whole reaction is the process of Fe 3+ and Fe 2+ circulation. Because the rate constant of this reaction is very low, the circulation of iron ions in the reaction process is hindered, and the iron ions in the system will be The accumulation of Fe 3+ is easy to produce precipitation under neutral conditions, so the reaction generally needs to be in acidic conditions, and the general pH is controlled at about 3.0;
其二，反应后溶液中残留Fe2+，会造成二次污染；Second, Fe 2+ remains in the solution after the reaction, which will cause secondary pollution;
其三，H2O2和Fe2+的添加量要有一定的比例；Third, the addition of H 2 O 2 and Fe 2+ must have a certain ratio;
其四，反应生成的OH·可氧化多余H2O2的，从而导致OH·数量大大减小，导致对有机物氧化不彻底。Fourth, the OH· generated by the reaction can oxidize excess H 2 O 2 , resulting in a large reduction in the amount of OH·, resulting in incomplete oxidation of organic matter.
以上缺陷限制了芬顿氧化法的pH范围、Fe2+的利用率和对有机物的去除能力。The above defects limit the pH range, Fe 2+ utilization rate and organic removal ability of Fenton oxidation.
EDDS与过渡金属有很强的螯合作用，它最初是从一种放线菌中分离得到，作为一种天然物质，其生物毒性包括对植物和土壤微生物的毒性都很低，又具有生物可降解性。目前国内对EDDS的研究主要集中在重金属污染土壤修复和植物修复等领域，而研究EDDS改进芬顿/类芬顿法处理废水的研究未见报道。EDDS has a strong chelating effect on transition metals. It was originally isolated from an actinomycete. As a natural substance, its biological toxicity includes low toxicity to plants and soil microorganisms, and it is also bioavailable. Degradability. At present, domestic research on EDDS mainly focuses on heavy metal-contaminated soil remediation and phytoremediation, while the research on EDDS improving Fenton/Fenton-like wastewater treatment has not been reported.
发明内容Contents of the invention
为了解决上述技术问题，本发明提供了生物可降解螯合剂EDDS在处理难降解有机废水中的应用。In order to solve the above technical problems, the present invention provides the application of biodegradable chelating agent EDDS in the treatment of refractory organic wastewater.
所述应用，具体为：包括以下步骤：在难降解有机废水中加入生物可降解螯合剂EDDS和亚铁盐，调pH至7以下，再加入双氧水，反应，即可。The application specifically includes the following steps: adding biodegradable chelating agent EDDS and ferrous salt to the refractory organic wastewater, adjusting the pH to below 7, adding hydrogen peroxide, and reacting.
作为优选，生物可降解螯合剂EDDS的添加量为每升废水0.1～10mmol。Preferably, the added amount of the biodegradable chelating agent EDDS is 0.1-10 mmol per liter of waste water.
作为另一种优选，亚铁盐的添加量为每升废水0.02-2.00mmol。As another preference, the amount of ferrous salt added is 0.02-2.00 mmol per liter of waste water.
作为另一种优选，双氧水与亚铁盐的摩尔比为(2～6):1。As another preference, the molar ratio of hydrogen peroxide to ferrous salt is (2-6):1.
作为另一种优选，反应温度为室温，反应时间为4h-7d。As another preference, the reaction temperature is room temperature, and the reaction time is 4h-7d.
有益效果：本发明利用生物可降解螯合剂EDDS改进芬顿/类芬顿氧化法处理难降解有机废水，利用生物可降解螯合剂EDDS可控制双氧水降解率和同时络合Fe2+、Fe3+，不仅大大提高了双氧水的利用率，降低了亚铁盐的用量，拓宽了芬顿/类芬顿氧化法在水处理中的应用，而且大大增强了芬顿/类芬顿氧化法处理污水的效果。Beneficial effects: the invention utilizes the biodegradable chelating agent EDDS to improve the Fenton/Fenton-like oxidation method to treat refractory organic wastewater, and the biodegradable chelating agent EDDS can control the degradation rate of hydrogen peroxide and simultaneously complex Fe 2+ and Fe 3+ , not only greatly improves the utilization rate of hydrogen peroxide, reduces the amount of ferrous salt, broadens the application of Fenton/Fenton-like oxidation in water treatment, but also greatly enhances the efficiency of Fenton/Fenton-like oxidation in sewage treatment Effect.
在中性或酸性条件下，生物可降解螯合剂EDDS在反应体系中可和Fe2+发生络合反应，然后络合了生物可降解螯合剂EDDS的Fe2+与H2O2之间发生芬顿反应，从而一方面强化了对有机物的去除能力，另一方面有效解决了反应后溶液中残留Fe2+会造成二次污染的弊端。Under neutral or acidic conditions, the biodegradable chelating agent EDDS can undergo a complex reaction with Fe 2+ in the reaction system, and then the complex reaction between Fe 2+ and H 2 O 2 Fenton reaction, which on the one hand strengthens the ability to remove organic matter, and on the other hand effectively solves the disadvantages of secondary pollution caused by residual Fe 2+ in the solution after the reaction.
在中性或酸性条件下，生物可降解螯合剂EDDS在反应体系中可有效络合反应产生的Fe3+，形成溶解性络合物，增加Fe3+离子在水中的溶解度，减少铁泥的产生，有效改善了Fe3+和Fe2+的循环，提高了Fe2+利用率，从而有利于有机物的降解，避免了铁沉积。Under neutral or acidic conditions, the biodegradable chelating agent EDDS can effectively complex the Fe 3+ produced in the reaction system to form a soluble complex, increase the solubility of Fe 3+ ions in water, and reduce the iron sludge. It can effectively improve the circulation of Fe 3+ and Fe 2+ , improve the utilization rate of Fe 2+ , which is beneficial to the degradation of organic matter and avoids iron deposition.
具体实施方式Detailed ways
根据下述实施例，可以更好地理解本发明。然而，本领域的技术人员容易理解，实施例所描述的具体的物料配比、工艺条件及其结果仅用于说明本发明，而不应当也不会限制权利要求书中所详细描述的本发明。The present invention can be better understood from the following examples. However, those skilled in the art will readily understand that the specific material ratios, process conditions and results described in the examples are only used to illustrate the present invention, and should not and will not limit the present invention described in detail in the claims .
实施例1：芬顿法处理4-氯酚Embodiment 1: Fenton method handles 4-chlorophenol
向500mL pH调至7、初始浓度为50mg/L的4-氯酚溶液中加入4mmol H2O2和1mmol FeSO4，经过4小时4-氯酚的去除率为15.3%，24小时去除率为20.2%，3天去除率为21.1%，7天去除率为24.2%；4小时H2O2剩余量为89.3%，24小时剩余量为87.3%，3天剩余量为77.3%，7天剩余量为69.7%；经过4小时可溶性铁离子剩余量为9.4%，24小时剩余量为3.7%，3天剩余量为1.2%，7天剩余量为1.0%。Add 4mmol H 2 O 2 and 1mmol FeSO 4 to 500mL of 4-chlorophenol solution whose pH was adjusted to 7 and the initial concentration was 50mg/L. After 4 hours, the removal rate of 4-chlorophenol was 15.3%, and the removal rate in 24 hours was 20.2%, 21.1% in 3 days, 24.2% in 7 days; 89.3% in 4 hours, 87.3% in 24 hours, 77.3% in 3 days, 77.3% in 7 days After 4 hours, the remaining amount of soluble iron ions was 9.4%, after 24 hours, the remaining amount was 3.7%, after 3 days, the remaining amount was 1.2%, and after 7 days, the remaining amount was 1.0%.
实施例2：EDDS改善芬顿法处理4-氯酚Embodiment 2: EDDS improves the Fenton method to process 4-chlorophenol
向500mL pH调至7、初始浓度为50mg/L的4-氯酚溶液中加入4mmol H2O2、1mmolEDDS和1mmol FeSO4，经过4小时4-氯酚的去除率为92.7%，24小时去除率为99.2%，3天去除率为99.6%，7天去除率为100%；经过4小时H2O2剩余量为32.2%，24小时剩余量为10.9%，3天剩余量为6.9%，7天剩余量为3.6%；经过4小时可溶性铁离子剩余量为99.1%，24小时剩余量为99.2%，3天剩余量为100%，7天剩余量为94.9%。Add 4mmol H 2 O 2 , 1mmol EDDS and 1mmol FeSO 4 to 500mL of 4-chlorophenol solution whose pH was adjusted to 7 and the initial concentration was 50mg/L. After 4 hours, the removal rate of 4-chlorophenol was 92.7%. The removal rate is 99.2%, the removal rate is 99.6% in 3 days, and the removal rate is 100% in 7 days; after 4 hours, the remaining amount of H 2 O 2 is 32.2%, in 24 hours, the remaining amount is 10.9%, and in 3 days, the remaining amount is 6.9%. After 7 days, the remaining amount was 3.6%; after 4 hours, the remaining amount of soluble iron ions was 99.1%, after 24 hours, the remaining amount was 99.2%, after 3 days, the remaining amount was 100%, and after 7 days, the remaining amount was 94.9%.
实施例3：芬顿法处理甲基橙溶液Embodiment 3: Fenton method processes methyl orange solution
向500mL pH调至7、初始浓度为50mg/L的甲基橙溶液中加入4mmol H2O2和1mmol FeSO4，经过4小时甲基橙的去除率为23.6%，24小时去除率为37.0%，3天去除率为41.3%，7天去除率为46.2%；经过4小时H2O2剩余量为87.5%，24小时剩余量为86.5%，3天剩余量为72.3%，7天剩余量为64.7%；经过4小时可溶性铁离子剩余量为13.4%，24小时剩余量为11.7%，3天剩余量为10.2%，7天剩余量为7.0%。Add 4mmol H 2 O 2 and 1mmol FeSO 4 to 500mL of methyl orange solution whose pH was adjusted to 7 and the initial concentration was 50mg/L, the removal rate of methyl orange was 23.6% after 4 hours, and the removal rate was 37.0% after 24 hours , the 3-day removal rate was 41.3%, and the 7-day removal rate was 46.2%; the remaining amount of H 2 O 2 was 87.5% after 4 hours, 86.5% in 24 hours, 72.3% in 3 days, and 72.3% in 7 days After 4 hours, the remaining amount of soluble iron ions was 13.4%, after 24 hours, the remaining amount was 11.7%, after 3 days, the remaining amount was 10.2%, and after 7 days, the remaining amount was 7.0%.
实施例4：EDDS改善芬顿法处理甲基橙溶液Embodiment 4: EDDS improves the Fenton method to process methyl orange solution
向500mL pH调至7、初始浓度为50mg/L的甲基橙溶液中加入4mmol H2O2、1mmolEDDS和1mmol FeSO4，经过4小时甲基橙的去除率为90.6%，24小时去除率为98.4%，3天去除率为99.0%，7天去除率为99.4%；经过4小时H2O2剩余量为36.4%，24小时剩余量为12.3%，3天剩余量为7.5%，7天剩余量为4.7%；经过4小时可溶性铁离子剩余量为98.3%，24小时剩余量为96.7%，3天剩余量为93.7%，7天剩余量为97.0%。Add 4mmol H 2 O 2 , 1mmol EDDS and 1mmol FeSO 4 to 500mL methyl orange solution whose pH was adjusted to 7 and the initial concentration was 50mg/L. After 4 hours, the removal rate of methyl orange was 90.6%, and in 24 hours the removal rate was 98.4%, 99.0% in 3 days, 99.4% in 7 days; 36.4% of H 2 O 2 remaining after 4 hours, 12.3% in 24 hours, 7.5% in 3 days, 7 days The remaining amount is 4.7%; the remaining amount of soluble iron ions after 4 hours is 98.3%, the remaining amount is 96.7% after 24 hours, the remaining amount is 93.7% after 3 days, and the remaining amount is 97.0% after 7 days.
实施例5：芬顿法处理垃圾渗滤液Embodiment 5: Fenton process landfill leachate
取垃圾渗滤液500mL、调节pH至7，COD浓度为1763mg/L，加入0.1mmol H2O2和0.05mmol FeSO4，经过4小时COD的去除率为32.1%，24小时去除率为37.5%，3天去除率为40.3%，7天去除率为48.3%；经过4小时H2O2剩余量为73.5%，24小时剩余量为74.5%，3天剩余量为71.2%，7天剩余量为62.7%；经过4小时可溶性铁离子剩余量为18.4%，24小时剩余量为14.7%，3天剩余量为12.2%，7天剩余量为9.0%。Take 500mL of landfill leachate, adjust the pH to 7, the COD concentration is 1763mg/L, add 0.1mmol H 2 O 2 and 0.05mmol FeSO 4 , the removal rate of COD after 4 hours is 32.1%, and the removal rate of 24 hours is 37.5%. The removal rate was 40.3% in 3 days and 48.3% in 7 days; the remaining H 2 O 2 was 73.5% after 4 hours, 74.5% in 24 hours, 71.2% in 3 days, and 71.2% in 7 days. 62.7%; after 4 hours, the remaining soluble iron ion was 18.4%, after 24 hours, it was 14.7%, after 3 days, it was 12.2%, and after 7 days, it was 9.0%.
实施例6：EDDS改善芬顿法处理垃圾渗滤液Example 6: EDDS Improves Fenton Process to Treat Landfill Leachate
取垃圾渗滤液500mL、调节pH至7，COD浓度为1859mg/L，加入0.1mmol H2O2、5mmol EDDS和0.05mmol FeSO4，经过4小时COD的去除率为60.3%，24小时去除率为68.7%，3天去除率为73.2%，7天去除率为78.3%；经过4小时H2O2剩余量为27.5%，24小时剩余量为13.5%，3天剩余量为9.3%，7天剩余量为4.3%；经过4小时可溶性铁离子剩余量为98.4%，24小时剩余量为98.7%，3天剩余量为98.2%，7天剩余量为99.0%。实施例7：芬顿法处理印染废水Take 500mL of landfill leachate, adjust the pH to 7, the COD concentration is 1859mg/L, add 0.1mmol H 2 O 2 , 5mmol EDDS and 0.05mmol FeSO 4 , the removal rate of COD after 4 hours is 60.3%, and the removal rate of 24 hours is 68.7%, the removal rate was 73.2% in 3 days, and 78.3% in 7 days; after 4 hours, the remaining amount of H 2 O 2 was 27.5%, in 24 hours, the remaining amount was 13.5%, in 3 days, the remaining amount was 9.3%, and in 7 days The remaining amount is 4.3%; the remaining amount of soluble iron ions after 4 hours is 98.4%, the remaining amount is 98.7% after 24 hours, the remaining amount is 98.2% after 3 days, and the remaining amount is 99.0% after 7 days. Embodiment 7: Fenton method treatment printing and dyeing wastewater
取印染废水500mL、调节pH至7，COD浓度为734mg/L，加入0.05mmol H2O2和0.01mmol FeSO4，经过4小时COD的去除率为45.1%，24小时去除率为48.5%，3天去除率为53.3%，7天去除率为55.3%；经过4小时H2O2剩余量为82.5%，24小时剩余量为77.3%，3天剩余量为69.3%，7天剩余量为63.3%；经过4小时可溶性铁离子剩余量为23.4%，24小时剩余量为17.7%，3天剩余量为12.2%，7天剩余量为9.0%。Take 500mL of printing and dyeing wastewater, adjust the pH to 7, the COD concentration is 734mg/L, add 0.05mmol H 2 O 2 and 0.01mmol FeSO 4 , the removal rate of COD after 4 hours is 45.1%, and the removal rate of 24 hours is 48.5%, 3 The removal rate is 53.3% in one day and 55.3% in 7 days; the remaining H2O2 after 4 hours is 82.5%, the remaining amount in 24 hours is 77.3%, the remaining amount in 3 days is 69.3%, and the remaining amount in 7 days is 63.3% %; After 4 hours, the remaining amount of soluble iron ions was 23.4%, after 24 hours, the remaining amount was 17.7%, after 3 days, the remaining amount was 12.2%, and after 7 days, the remaining amount was 9.0%.
实施例8：EDDS改善芬顿法处理印染废水Example 8: EDDS improves the Fenton method to treat printing and dyeing wastewater
取印染废水500mL、调节pH至7，COD浓度为768mg/L，加入0.06mmol H2O2、0.05mmol EDDS和0.01mmol FeSO4，经过4小时COD的去除率为63.3%，24小时去除率为68.7%，3天去除率为74.2%，7天去除率为76.3%；经过4小时H2O2剩余量为37.5%，24小时剩余量为30.2%，3天剩余量为20.3%，7天剩余量为12.6%；经过4小时可溶性铁离子剩余量为98.3%，24小时剩余量为98.7%，3天剩余量为99.2%，7天剩余量为98.6%。Take 500mL of printing and dyeing wastewater, adjust the pH to 7, the COD concentration is 768mg/L, add 0.06mmol H 2 O 2 , 0.05mmol EDDS and 0.01mmol FeSO 4 , the removal rate of COD after 4 hours is 63.3%, and the removal rate of 24 hours is 68.7%, the removal rate was 74.2% in 3 days, and 76.3% in 7 days; after 4 hours, the remaining amount of H 2 O 2 was 37.5%, in 24 hours, the remaining amount was 30.2%, in 3 days, the remaining amount was 20.3%, in 7 days The remaining amount is 12.6%; the remaining amount of soluble iron ion after 4 hours is 98.3%, the remaining amount is 98.7% after 24 hours, the remaining amount is 99.2% after 3 days, and the remaining amount is 98.6% after 7 days.
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| CN104710000A (en) * | 2015-03-03 | 2015-06-17 | 中北大学 | Method and device for degrading nitrobenzene waste water in high gravity field through catalytic ozonation |
| CN107638785A (en) * | 2017-09-29 | 2018-01-30 | 北京化工大学 | A kind of method of liquid phase oxidation denitration |
| CN108059228A (en) * | 2017-12-20 | 2018-05-22 | 苏州科技大学 | A kind of method of sulfamido antiseptic in removal livestock breeding wastewater |
| CN108328677A (en) * | 2018-03-08 | 2018-07-27 | 河海大学 | A kind of Multifunctional environment friendly composite material and preparation method and application |
| CN109734172A (en) * | 2019-03-14 | 2019-05-10 | 燕山大学 | A kind of method for treating organic wastewater by iron complex Fenton reaction |
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| CN102083557A (en) * | 2008-06-23 | 2011-06-01 | 三菱瓦斯化学株式会社 | Agent for purifying soil and/or underground water and purification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104710000A (en) * | 2015-03-03 | 2015-06-17 | 中北大学 | Method and device for degrading nitrobenzene waste water in high gravity field through catalytic ozonation |
| CN107638785A (en) * | 2017-09-29 | 2018-01-30 | 北京化工大学 | A kind of method of liquid phase oxidation denitration |
| CN107638785B (en) * | 2017-09-29 | 2020-12-11 | 北京化工大学 | A kind of method of liquid phase oxidation denitrification |
| CN108059228A (en) * | 2017-12-20 | 2018-05-22 | 苏州科技大学 | A kind of method of sulfamido antiseptic in removal livestock breeding wastewater |
| CN108328677A (en) * | 2018-03-08 | 2018-07-27 | 河海大学 | A kind of Multifunctional environment friendly composite material and preparation method and application |
| CN108328677B (en) * | 2018-03-08 | 2021-04-27 | 河海大学 | Multifunctional environment-friendly composite material and preparation method and application thereof |
| CN109734172A (en) * | 2019-03-14 | 2019-05-10 | 燕山大学 | A kind of method for treating organic wastewater by iron complex Fenton reaction |
| CN115872516A (en) * | 2022-12-20 | 2023-03-31 | 成都理工大学 | Wastewater treatment method of Fenton system under bicarbonate coexistence condition |
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