CN115430452A - 一种氮改性生物炭材料及对有机污染水体的处理方法 - Google Patents
一种氮改性生物炭材料及对有机污染水体的处理方法 Download PDFInfo
- Publication number
- CN115430452A CN115430452A CN202211174010.8A CN202211174010A CN115430452A CN 115430452 A CN115430452 A CN 115430452A CN 202211174010 A CN202211174010 A CN 202211174010A CN 115430452 A CN115430452 A CN 115430452A
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- modified biochar
- biochar material
- water body
- dcp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 31
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 16
- 231100000719 pollutant Toxicity 0.000 claims abstract description 16
- 239000010902 straw Substances 0.000 claims abstract description 12
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012265 solid product Substances 0.000 claims abstract description 10
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 8
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 238000000197 pyrolysis Methods 0.000 claims abstract description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 8
- HFZWRUODUSTPEG-UHFFFAOYSA-N 2,4-dichlorophenol Chemical compound OC1=CC=C(Cl)C=C1Cl HFZWRUODUSTPEG-UHFFFAOYSA-N 0.000 claims description 47
- 238000001914 filtration Methods 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 9
- 238000006731 degradation reaction Methods 0.000 abstract description 9
- 239000003575 carbonaceous material Substances 0.000 abstract description 7
- 230000003213 activating effect Effects 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 3
- FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical compound [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 description 27
- VGVRPFIJEJYOFN-UHFFFAOYSA-N 2,3,4,6-tetrachlorophenol Chemical class OC1=C(Cl)C=C(Cl)C(Cl)=C1Cl VGVRPFIJEJYOFN-UHFFFAOYSA-N 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000001994 activation Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000003642 reactive oxygen metabolite Substances 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 241000209149 Zea Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- IZUPBVBPLAPZRR-UHFFFAOYSA-N pentachlorophenol Chemical compound OC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl IZUPBVBPLAPZRR-UHFFFAOYSA-N 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- LINPIYWFGCPVIE-UHFFFAOYSA-N 2,4,6-trichlorophenol Chemical compound OC1=C(Cl)C=C(Cl)C=C1Cl LINPIYWFGCPVIE-UHFFFAOYSA-N 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- YMGGAHMANIOXGP-UHFFFAOYSA-L disodium;oxido sulfate Chemical compound [Na+].[Na+].[O-]OS([O-])(=O)=O YMGGAHMANIOXGP-UHFFFAOYSA-L 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
- -1 transition metal cation Chemical class 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Treatment By Sorption (AREA)
Abstract
本发明公开了一种氮改性生物炭材料及对有机污染水体的处理方法,涉及炭材料加工技术领域。本发明是利用秸秆粉末、三聚氰胺、碳酸钠在管式炉中加热至800℃进行热解,然后对热解后的固体产物研磨、洗涤、干燥、过筛处理,得到一种氮改性生物炭材料。利用该氮改性生物炭材料对过硫酸盐进行活化处理,从而使得活化后的过硫酸盐具有较高的氧化性,从而快速处理含氯酚类污染物的水体,水体中氯酚类污染物的降解率高达98%以上。
Description
技术领域
本发明属于炭材料加工技术领域,具体涉及一种氮改性生物炭材料及对有机污染水体的处理方法。
背景技术
氯酚类化合物(CPs)主要包括2,4-二氯酚、五氯酚和2,4,6-三氯酚等,被广泛应用于农业及工业生产中。然而,由于原料使用、加工生产、仓库储存及废弃物的处置不当,CPs会通过泄露、废水排放途径进入环境中,与之相伴而来的水环境污染问题日益突出。
CPs会对人类和其他生物造成强烈的毒害作用,给人类健康和生态环境带来极大的风险。CPs毒性强、难降解,是一类持久性有机污染物。因此,去除水环境中CPs污染刻不容缓。
近年来,基于过硫酸盐(PS)的高级氧化技术得到快速发展与研究。PS包括过一硫酸盐和过二硫酸盐两种,PMS凭借其自身结构的不对称性,更容易被活化产生活性氧物质(ROS),因此更具有应用前景。
热活化、紫外光活化、过渡金属阳离子活化、零价铁活化等方式是活化PS的常用方法。然而,这些方法由于能耗高或者金属浸出导致二次污染等限制性因素的存在,极大影响了广泛实际的应用。
非金属碳材料催化剂(石墨烯、碳纳米管、活性炭和生物炭等)已被证明均可以活化PMS,产生SO4·-,进而促进有机污染物的降解。但原始碳材料的催化性能有时并不能令人满意,因此必须在碳材料中掺杂氮、硫、磷等杂原子进行改性进而使其具有更高催化活性。在众多碳材料中,生物炭成本低,易制备、原料来源广泛。但是针对以生物炭为原料,通过氮掺杂改性活化过硫酸盐,降解污染物的研究十分有限。
发明内容
针对现有技术的不足,本发明提供了一种氮改性生物炭材料及对有机污染水体的处理方法。
本发明是采用以下技术方案实现的:
一种氮改性生物炭材料,包括以下步骤制备而成:
(1)称取原料:称取制备比为3:6:4.5的秸秆粉末、三聚氰胺、碳酸钠;
(2)向管式炉中通入氮以排空氧气,然后将称取的秸秆粉末、三聚氰胺、碳酸钠混合后置于管式炉中,将管式炉进行加热至800℃进行热解,保温2h后自然冷却至室温;
(3)将热解后的固体产物研磨处理,然后用蒸馏水和乙醇进行洗涤至pH值恒定;
(4)干燥、过筛后得到氮改性生物炭材料。
在本发明中,所述秸秆可以为农作物秸秆,其中优选的秸秆为玉米秸秆。
优选的,本发明步骤(2)所述管式炉的升温速率为10℃/min。
优选的,步骤(4)所述的干燥温度为60℃,干燥时间为6h。
优选的,步骤(4)将干燥后的固体产物过100目筛。
本发明所述制备的氮改性生物炭材料能够对过硫酸盐进行活化处理,以提高过硫酸盐对氯酚类污染水体的处理效果。
本发明还提供了一种有机污染水体的处理方法,具体方法如下:
S1:在氯酚类污染物含量为100mg/L的水体中加入过硫酸盐,以使得水体中过硫酸盐的浓度为1mM;
S2:调节水体pH值中性或弱酸性;
S3:加入所述氮改性生物炭材料,所述水体中氮改性生物炭材料加入量为0.05-0.2g/L,充分搅拌30-60min,过滤。
优选的,所述氯酚类污染物包括但不限于2,4-二氯酚。
本发明氮改性生物炭材料(NSBC)所具有的吸附特性能够促进表面官能团与过一硫酸盐(SO5 2-)充分接触,使其分解并产生活性氧物质,随后,在SO4·-、·OH、1O2以及O2·-的攻击下,2,4-DCP被分解为各种中间体,最终被转化为CO2和水,如下所示:
NSBC-OH+SO5 2-→NSBC-O·+SO4·-+OH-
NSBC-OOH+SO5 2-→NSBC-O·+SO4·-+OH-
SO4·-+H2O→·OH+SO4 2-+H+
O2·-/1O2/·OH/SO4·-+2,4-DCP→中间产物→CO2+H2O
与现有技术相比,本发明具有以下有益效果:
本发明是利用秸秆粉末、三聚氰胺、碳酸钠在管式炉中加热至800℃进行热解,然后对热解后的固体产物研磨、洗涤、干燥、过筛处理,得到一种氮改性生物炭材料。利用该氮改性生物炭材料对过硫酸盐进行活化处理,从而使得活化后的过硫酸盐具有较高的氧化性,从而快速处理含氯酚类污染物的水体,水体中氯酚类污染物的降解率高达98%以上。
附图说明
图1为实施例1制备的氮改性生物炭材料SEM图;
图2为实施例1制备的氮改性生物炭材料XPS图;
图3为实施例1制备的氮改性生物炭材料FT-IR检测图;
图4为实施例1制备的氮改性生物炭材料XRD检测图;
图5为实施例1以及对比例1-2对水体中2,4-DCP去除效果;
图6为不同NSBC投加量对水体中2,4-DCP去除效果;
图7为不同PMS浓度对水体中2,4-DCP去除效果;
图8为不同pH值对水体中2,4-DCP的去除效果;
图9为实施例1制备的氮改性生物炭材料重复利用对含氯酚类污染物的降解性能。
具体实施方式
为使本发明的目的、特征和优点能够更加明显易懂,下面结合附图对本发明的具体实施方式做详细的说明。附图中给出了本发明的若干实施例。但是,本发明可以以许多不同的形式来实现,并不限于本文所描述的实施例。相反地,提供这些实施例的目的是使对本发明的公开内容更加透彻全面。
实施例1
一种氮改性生物炭材料,具体制备方法如下:
(1)称取原料:称取制备比为3:6:4.5的玉米秸秆粉末(平均粒径为1mm)、三聚氰胺、碳酸钠
(2)向管式炉中通入氮以排空氧气,然后将称取的秸秆粉末、三聚氰胺、碳酸钠混合球磨1h后置于管式炉中,将管式炉进行加热至800℃进行热解(升温速率为10℃/min),保温2h后自然冷却至室温;
(3)将热解后的固体产物研磨处理(研磨至平均粒径为0.15mm),然后用蒸馏水和乙醇进行洗涤至pH值恒定;
(4)将洗涤后的固体产物置于恒温干燥箱中进行干燥,其中干燥温度为60℃,干燥时间为6h,干燥后过100目过筛,得到氮改性生物炭材料(简称:NSBC)。将检测,本发明的氮改性生物炭材料具有密集且发达的孔隙结构,比表面积为1172.865m2/g,总孔体积为1.051cm3/g,孔径为20.0337nm,如图1-图4所示。
利用本发明的氮改性生物炭材料对含2,4-DCP的水体进行处理,具体处理方法如下(简称:NSBC+PMS处理方法):
S1:以2,4-二氯酚(2,4-DCP)为模型污染物,配制浓度为100mg/L的2,4-DCP污染物溶液,量取100mL于100ml锥形瓶中;
S2:加入过一硫酸钠(PMS)30.8mg,并调节溶液pH为7;
S3:加入本发明制备的氮改性生物炭材料10mg,充分搅拌40min,过滤(0.22μm滤膜过滤)。
经检测,反应40min后,水体中2,4-DCP降解率达到98.45%。
实施例2
提供天然水中的几种阴离子基质成分(HCO3 -、Cl-、NO3 -)对水体处理中的影响,具体试验如下:
步骤S1:模拟天然水体,在配制的100mL 2,4-DCP污染物溶液中,分别加入5mMNaHCO3(投加量42mg)、NaCl(投加量29.2mg)、KNO3(投加量50.5mg),均置于磁力搅拌器上;
S2:加入过一硫酸钠30.8mg,并调节溶液pH为7;
S3:加入本发明制备的氮改性生物炭材料10mg,充分搅拌40min,过滤(0.22μm滤膜过滤)。
经过测量,三种阴离子(HCO3 -、Cl-、NO3 -)的加入对反应体系影响不大,反应40min后,2,4-DCP降解率均达到90%以上,分别为93.64%、94.8%、97.46%。说明在该处理方法在水体中HCO3 -、Cl-、NO3 -浓度小于5mM的地区仍然适用。
对比例1
一种对含氯酚类污染水体进行处理的方法(简称:PMS处理方法),包括以下步骤:
S1:以2,4-二氯酚(2,4-DCP)为模型污染物,配制浓度为100mg/L的2,4-DCP污染物溶液,量取100mL于100ml锥形瓶中;
S2:加入过一硫酸钠30.8mg,并调节溶液pH为7;
S3:充分搅拌40min,过滤(0.22μm滤膜过滤)。
对比例2
一种对含氯酚类污染水体进行处理的方法(简称:NSBC处理方法),包括以下步骤:
S1:以2,4-二氯酚(2,4-DCP)为模型污染物,配制浓度为100mg/L的2,4-DCP污染物溶液,量取100mL于100ml锥形瓶中;
S2:调节溶液pH为7;
S3:加入本发明制备的氮改性生物炭材料10mg,充分搅拌40min,过滤(0.22μm滤膜过滤)。
实施例1以及对比例1-2两种处理方法对水体中氯酚类污染的降解情况如图5所示,在PMS溶液中,如果不加入NSBC,2,4-DCP的去除率仅为5.73%,表明PMS在室温下具有弱氧化性能,需要活化。相比之下,添加NSBC可在40min内将2,4-DCP的去除效率提高至98.45%,表明NSBC活化PMS可有效降解2,4-DCP。在单独存在NSBC的情况下,14.50%的2,4-DCP被去除,表明NSBC对2,4-DCP也有一定的吸附作用。此外,采用TOC分析仪测定了反应体系中总有机碳浓度,反应40min后,TOC从55.94mg/L降至20.51mg/L,2,4-DCP矿化率63.33%,体系矿化效率适中。因此通过本实验可以初步得知,PMS可以被NSBC成功活化用以降解2,4-DCP。
在一些实施例中,调整实施例1中NSBC投加量对2,4-DCP对含2,4-DCP的水体进行处理,如图6所示,在25℃,PMS浓度为1mM,2,4-DCP浓度为100mg/L,pH为7的条件下,当NSBC用量从0.05g/L提高至0.2g/L时,40min内NSBC/PMS体系中2,4-DCP的去除率从65.88%提升至100%,0.2g/L的NSBC已可在20min内将溶液中的2,4-DCP全部去除。因此,提高NSBC投加量有利于增加吸附容量,强化对2,4-DCP的吸附效果,同时为PMS活化提供了更多活性位点,提高氧化速率。
在一些实施例中,调整实施例1中PMS投加量对2,4-DCP对含2,4-DCP的水体进行处理,如图7所示,在25℃,NSBC浓度为0.1g/L,2,4-DCP浓度为100mg/L,pH为7的条件下,研究比较了PMS浓度分别为0.1mM、0.5mM、1mM、3mM、5mM和10mM时的2,4-DCP去除情况,结果表明,随着PMS浓度的增加,2,4-DCP去除率呈现先增后降趋势,在PMS浓度为1mM时去除率最高(98.45%)。这可能是因为NSBC对PMS和2,4-DCP的吸附容量有限,当PMS浓度较低时,NSBC表面易被有机物占据,即使存在少量的PMS在NSBC表面活化,NSBC吸附的2,4-DCP也不足以被完全氧化,而当PMS浓度较高时,表面吸附位点易被PMS占据,抑制了对2,4-DCP的吸附,导致其对污染物的去除也不理想。
在一些实施例中,调整实施例1中pH值,对含2,4-DCP的水体进行处理,如图8所示。pH对水生氧化反应通常具有综合作用,从图8中可以看出,在酸性和中性条件下2,4-DCP的去除效果好于碱性条件。在25℃,NSBC浓度为0.1g/L,PMS浓度为1mM,2,4-DCP浓度为100mg/L的条件下,初始pH为3和5时,去除率分别为96.79%、97.16%,pH为7时,2,4-DCP的去除率最高,达到98.45%。随着初始pH继续升高,到9和11时,2,4-DCP去除效果明显降低,仅为65.66%和23.97%。实验结果说明NSBC适用的pH范围广,该体系在pH 3~7的废水环境中也可以保持优秀的降解性能。
关于NSBC重复使用后性能影响,如图9所示。将NSBC从反应后的溶液中分离回收,并用超纯水和乙醇反复清洗数次,置于60℃烘箱中干燥。在25℃,NSBC浓度为0.1g/L,PMS浓度为1mM,2,4-DCP浓度为100mg/L,pH为7的条件下进行重复实验。结果如图9所示,三次重复实验后NSBC仍有较高催化活性,2,4-DCP的去除率分别为98.45%、74.68%和67.9%,均有所下降。这可能与反应消耗的一些活性位点有关,从而影响了2,4-DCP的去除效率。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
Claims (7)
1.一种氮改性生物炭材料,其特征在于,包括以下步骤制备而成:
(1)称取原料:称取制备比为3:6:4.5的秸秆粉末、三聚氰胺、碳酸钠;
(2)向管式炉中通入氮以排空氧气,然后将称取的秸秆粉末、三聚氰胺、碳酸钠混合后置于管式炉中,将管式炉进行加热至800℃进行热解,保温2h后自然冷却至室温;
(3)将热解后的固体产物研磨处理,然后用蒸馏水和乙醇进行洗涤至pH值恒定;
(4)干燥、过筛后得到氮改性生物炭材料。
2.根据权利要求1所述的氮改性生物炭材料,其特征在于,步骤(2)所述管式炉的升温速率为10℃/min。
3.根据权利要求1所述的氮改性生物炭材料,其特征在于,步骤(4)所述的干燥温度为60℃,干燥时间为6h。
4.根据权利要求1所述的氮改性生物炭材料,其特征在于,步骤(4)将干燥后的固体产物过100目筛。
5.一种有机污染水体的处理方法,其特征在于,利用权利要求1~4任意一项所述氮改性生物炭材料对氯酚类污染水体进行处理。
6.根据权利要求5所述氯酚类污染水体的处理方法,其特征在于,包括以下步骤:
S1:在氯酚类污染物含量为100mg/L的水体中加入过硫酸盐,以使得水体中过硫酸盐的浓度为1mM;
S2:调节水体pH值中性或弱酸性;
S3:加入所述氮改性生物炭材料,所述水体中氮改性生物炭材料加入量为0.05-0.2g/L,充分搅拌30-60min,过滤。
7.根据权利要求6所述的方法,其特征在于,所述氯酚类污染物包括但不限于2,4-二氯酚。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211174010.8A CN115430452A (zh) | 2022-09-26 | 2022-09-26 | 一种氮改性生物炭材料及对有机污染水体的处理方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211174010.8A CN115430452A (zh) | 2022-09-26 | 2022-09-26 | 一种氮改性生物炭材料及对有机污染水体的处理方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN115430452A true CN115430452A (zh) | 2022-12-06 |
Family
ID=84249083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202211174010.8A Pending CN115430452A (zh) | 2022-09-26 | 2022-09-26 | 一种氮改性生物炭材料及对有机污染水体的处理方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115430452A (zh) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101524634A (zh) * | 2008-12-30 | 2009-09-09 | 淮阴师范学院 | 玉米秸秆芯穰吸附材料及其制备方法 |
CN103495389A (zh) * | 2013-08-30 | 2014-01-08 | 蚌埠凤凰滤清器有限责任公司 | 一种改性秸秆活性炭水处理剂及其制备方法 |
CN110227534A (zh) * | 2019-07-16 | 2019-09-13 | 河南省科学院化学研究所有限公司 | 一种基于污泥的磁性氮掺杂生物炭催化剂及其制备方法 |
CN110743588A (zh) * | 2019-10-10 | 2020-02-04 | 西安建筑科技大学 | 一种氮掺杂生物炭催化材料及其制备方法与应用 |
CN112316967A (zh) * | 2020-10-21 | 2021-02-05 | 江苏中烟工业有限责任公司 | 一种用于降解水中苯酚的氮硫双掺杂生物炭材料的制备方法 |
CN115043479A (zh) * | 2022-05-17 | 2022-09-13 | 山西财经大学 | 一种氮掺杂生物炭及其制备方法和应用 |
-
2022
- 2022-09-26 CN CN202211174010.8A patent/CN115430452A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101524634A (zh) * | 2008-12-30 | 2009-09-09 | 淮阴师范学院 | 玉米秸秆芯穰吸附材料及其制备方法 |
CN103495389A (zh) * | 2013-08-30 | 2014-01-08 | 蚌埠凤凰滤清器有限责任公司 | 一种改性秸秆活性炭水处理剂及其制备方法 |
CN110227534A (zh) * | 2019-07-16 | 2019-09-13 | 河南省科学院化学研究所有限公司 | 一种基于污泥的磁性氮掺杂生物炭催化剂及其制备方法 |
CN110743588A (zh) * | 2019-10-10 | 2020-02-04 | 西安建筑科技大学 | 一种氮掺杂生物炭催化材料及其制备方法与应用 |
CN112316967A (zh) * | 2020-10-21 | 2021-02-05 | 江苏中烟工业有限责任公司 | 一种用于降解水中苯酚的氮硫双掺杂生物炭材料的制备方法 |
CN115043479A (zh) * | 2022-05-17 | 2022-09-13 | 山西财经大学 | 一种氮掺杂生物炭及其制备方法和应用 |
Non-Patent Citations (2)
Title |
---|
刘希涛: "活化过硫酸盐在环境污染控制中的应用", 30 April 2018, 中国环境出版集团, pages: 63 - 64 * |
陈玉华: "新型清洁能源技术", 31 January 2019, 知识产权出版社, pages: 194 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Wang et al. | Copper-based catalyst from waste printed circuit boards for effective Fenton-like discoloration of Rhodamine B at neutral pH | |
Li et al. | Microwave-enhanced Mn-Fenton process for the removal of BPA in water | |
Bhattacharya et al. | Adsorption, kinetics and equilibrium studies on removal of Cr (VI) from aqueous solutions using different low-cost adsorbents | |
Vakilabadi et al. | Catalytic potential of Cu/Mg/Al-chitosan for ozonation of real landfill leachate | |
Gardea-Torresdey et al. | Use of phytofiltration technologies in the removal of heavy metals: A review | |
Gülen et al. | Methylene Blue Adsorption on a Low Cost Adsorbent—Carbonized Peanut Shell: Gülen and Zorbay | |
Yusuff et al. | ZnCl2-modified eucalyptus bark biochar as adsorbent: preparation, characterization and its application in adsorption of Cr (VI) from aqueous solutions | |
El-Nemr et al. | Removal of acid yellow 11 dye using novel modified biochar derived from watermelon peels | |
CN108993475B (zh) | 一种三元复合材料非均相光Fenton催化剂及其制备和应用 | |
Ameri et al. | Optimizing modified rice bran for treating aqueous solutions polluted by Cr (VI) ions: isotherm and kinetics analyses | |
CN108503015A (zh) | 一种污泥热解制备光Fenton催化剂的方法及催化剂和应用 | |
CN112439417B (zh) | 一种铁铝碳复合催化材料、制备方法及有机废水降解方法 | |
CN113828332B (zh) | 一种硫化钴负载生物炭催化剂及其制备方法和应用 | |
CN110756163A (zh) | 一种纳米CoFe2O4/碳纤维毡复合材料及其制备方法和应用 | |
Ou et al. | Preparation of iron/calcium-modified biochar for phosphate removal from industrial wastewater | |
Chai et al. | Upcycling contaminated biomass into metal-supported heterogeneous catalyst for electro-Fenton degradation of thiamethoxam: Preparation, mechanisms, and implications | |
Rahim et al. | Synthesis of alumina-carbon framework for efficient sorption of methyl orange from wastewater with factorial design and mechanisms | |
CN114394727A (zh) | 基于市政污泥生物炭的处理剂的制备方法及应用 | |
CN114436408A (zh) | 一种磁性菌糠生物炭及其制备方法和应用 | |
Luo et al. | Effect of Mn-based magnetic biochar/PS reaction system on oxidation of metronidazole | |
Zhuang et al. | Waste rice straw and coal fly ash composite as a novel sustainable catalytic particle electrode for strengthening oxidation of azo dyes containing wastewater in electro-Fenton process | |
Yang et al. | Thermally activated natural chalcopyrite for Fenton-like degradation of Rhodamine B: Catalyst characterization, performance evaluation, and catalytic mechanism | |
Deng et al. | Removal effect of Cr (VI) by adsorbent made from sewage sludge | |
CN106242013B (zh) | 天然磁黄铁矿与零价铁混合处理含重金属离子废水的方法 | |
Guo et al. | Enhanced removal of aqueous chromium (VI) by KOH-activated soybean straw-based carbon |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |