CN102357355A - Preparation method of modified fly ash for treating ammonia nitrogen waste water - Google Patents

Preparation method of modified fly ash for treating ammonia nitrogen waste water Download PDF

Info

Publication number
CN102357355A
CN102357355A CN201110277856XA CN201110277856A CN102357355A CN 102357355 A CN102357355 A CN 102357355A CN 201110277856X A CN201110277856X A CN 201110277856XA CN 201110277856 A CN201110277856 A CN 201110277856A CN 102357355 A CN102357355 A CN 102357355A
Authority
CN
China
Prior art keywords
ammonia nitrogen
waste water
coal ash
nitrogen waste
fly ash
Prior art date
Application number
CN201110277856XA
Other languages
Chinese (zh)
Inventor
李宝霞
翁连进
陈婉妹
Original Assignee
华侨大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华侨大学 filed Critical 华侨大学
Priority to CN201110277856XA priority Critical patent/CN102357355A/en
Publication of CN102357355A publication Critical patent/CN102357355A/en

Links

Abstract

The invention discloses a preparation method of modified fly ash for treating ammonia nitrogen waste water. The preparation method comprises the following steps of immersing a raw material of fly ash in 0.5 to 8 mol/L of a sodium hydroxide solution for 0.5 to 10 hours under the conditions of a temperature of 10 to 90 DEG C and a solid-liquid ratio of 1: (2 to 10); washing by soft water which does not contain calcium and magnesium, and drying to obtain the modified fly ash. When ammonia nitrogen waste water flows through a device loaded with the modified fly ash, ammonia nitrogen in the ammonia nitrogen waste water can be removed and an ammonia nitrogen removal rate reaches above 75%.

Description

A kind of preparation method who is used to handle the modified coal ash of ammonia nitrogen waste water
Technical field
The present invention relates to a kind of modified coal ash that can be used to handle nitrogen-containing wastewater, specifically is the preparation method of this modified coal ash.
Background technology
The discharging of ammonia nitrogen waste water is one type of bigger pollution sources of current nitrogen fertilizer plant.A large amount of ammonia nitrogen waste waters injects after the rivers and lakes, causes the large-area eutrophication of natural, ecological, not only destroys the ecological balance, and because some areas water pollution is serious, brings great difficulty for the preliminary treatment of water for industrial use.At present, the method for ammonia nitrogen waste water processing has bioanalysis, break point chlorination method and absorption method etc.Bioanalysis has very high requirement in actual production, denitrification effect is stable inadequately; The break point chlorination method needs to add a large amount of toxic chlorine in processing procedure, so this method is not suitable for the ammonia nitrogen in the Drinking Water; Absorption method causes people's attention because of having advantages such as treatment effeciency height, technology is simple, processing cost is low.
Flyash is the product of coal-fired power plant, sees from the chemical composition and the configuration of surface of flyash, and flyash is a kind of material for water treatment preferably.Research both at home and abroad shows the main chemical compositions SiO of flyash 2And Al 2O 3Deng, have stronger adsorption capacity, aspect wastewater treatment, having wide should have prospect.Flyash has Al-O tetrahedron and the special space structure of Si-O tetrahedron, and the surface has negative electrical charge, has ion-exchange performance. but the absorption property of original state flyash is not high, needs through modification to improve absorption property.At present; The method of modifying of flyash mainly contains sour modification, alkali modification, salt modification, method such as surfactant-modified, mixed and modified, and the flyash through after the modification all can improve its clearance to dissimilar waste water; But the research that flyash is handled to ammonia nitrogen waste water is less; If can flyash extensively be applied to the processing in ammonia nitrogen waste water field, not only can reduce present ammonia nitrogen waste water processing burden, simultaneously flyash is turned waste into wealth; Realize the treatment of wastes with processes of wastes against one another, reach the doulbe-sides' victory of economy and environmental benefit.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method who is used to handle the modified coal ash of ammonia nitrogen waste water; This method can obtain the ability of the ammonia nitrogen of absorption ammonia nitrogen waste water to the raw meal coal ash through modification; Reduce the cost of material of handling waste water, had low, the effective advantage of cost.
To achieve these goals, the present invention adopts following technical scheme:
A kind of preparation method who is used to handle the modified coal ash of ammonia nitrogen waste water; It is the sodium hydroxide solution of 0.5-8 mol that the raw meal coal ash is placed concentration, and making solid-to-liquid ratio is 1: 2-10, after soaking 0.5-10 hour under 10-90 ℃; Clean with dry, obtain modified coal ash.
Said raw meal coal ash is the flyash after power plant's burning, and the scope of its granular size is: 10 μ m-300 μ m.
The used rinse water of said cleaning process is to take off the soft water of removing calcium and magnesium.
After adopting such scheme, the invention has the advantages that:
1, the present invention makes it obtain the ability of the ammonia nitrogen in the absorption ammonia nitrogen waste water through the raw meal coal ash is carried out modification, and these modified coal ash raw material sources are extensive; Cost is low; Reduced the cost of material of handling waste water, and ammonia nitrogen removal frank can reach more than 75%, ammonia nitrogen removal is effective.
2, can be used as agricultural fertilizer behind the modified coal ash absorption ammonia nitrogen of the present invention and use, turn waste into wealth.
The specific embodiment
The present invention is a kind of to be used to handle the preparation method of the modified coal ash of ammonia nitrogen waste water, realizes through following scheme:
It is the sodium hydroxide solution of 0.5-8 mol that the raw meal coal ash is placed concentration, and making solid-to-liquid ratio is 1: 2-10, after soaking 0.5-10 hour under 10-90 ℃, clean with dry, and obtain modified coal ash.Ammonia nitrogen waste water is flow through the device that this modified coal ash is housed, can remove the ammonia nitrogen in the waste water, ammonia nitrogen removal frank can reach more than 75%.
Wherein, the raw meal coal ash can adopt the flyash after power plant's burning, and the scope of its granular size is: 10 μ m-300 μ m.The used rinse water of cleaning process can adopt the soft water that takes off removing calcium and magnesium.
Embodiment 1:
Raw meal coal ash (10 μ m-300 μ m) is placed the sodium hydroxide solution of 0.5 mol, and making solid-to-liquid ratio is 1: 10, after soaking 10 hours under 90 ℃ of reaction temperatures, cleans with the soft water that takes off removing calcium and magnesium, and drying obtains modified coal ash.
Ammonia nitrogen waste water (the pH value is 7, and ammonia-nitrogen content is more than 150mg/ rises) is flow through the device of the modified coal ash that embodiment 1 gained is housed, can remove the ammonia nitrogen in the waste water, ammonia nitrogen removal frank can reach more than 80%.
Embodiment 2:
Raw meal coal ash (10m-300 μ m) is placed the sodium hydroxide solution of 5 mol, and making solid-to-liquid ratio is 1: 5, after soaking 5 hours under 50 ℃ of reaction temperatures, cleans with the soft water that takes off removing calcium and magnesium, and drying obtains modified coal ash.
Ammonia nitrogen waste water (the pH value is 5, and ammonia-nitrogen content is more than 80mg/ rises) is flow through the device of the modified coal ash that embodiment 2 gained are housed, can remove the ammonia nitrogen in the waste water, ammonia nitrogen removal frank can reach more than 75%.
Embodiment 3:
Raw meal coal ash (10m-300 μ m) is placed the sodium hydroxide solution of 8 mol, and making solid-to-liquid ratio is 1: 3, after soaking 0.5 hour under 10 ℃ of reaction temperatures, cleans with the soft water that takes off removing calcium and magnesium, and drying obtains modified coal ash.
Ammonia nitrogen waste water (the pH value is 10, and ammonia-nitrogen content is more than 250mg/ rises) is flow through the device of the modified coal ash that embodiment 3 gained are housed, can remove the ammonia nitrogen in the waste water, ammonia nitrogen removal frank can reach more than 88%.

Claims (3)

1. preparation method who is used to handle the modified coal ash of ammonia nitrogen waste water; It is characterized in that: it is the sodium hydroxide solution of 0.5-8 mol that the raw meal coal ash is placed concentration; Making solid-to-liquid ratio is 1: 2-10; After soaking 0.5-10 hour under 10-90 ℃, clean with dry, obtain modified coal ash.
2. a kind of preparation method who is used to handle the modified coal ash of ammonia nitrogen waste water according to claim 1 is characterized in that: said raw meal coal ash is the flyash after power plant's burning, and the scope of its granular size is: 10 μ m-300 μ m.
3. a kind of preparation method who is used to handle the modified coal ash of ammonia nitrogen waste water according to claim 1, it is characterized in that: the used rinse water of said cleaning process is to take off the soft water of removing calcium and magnesium.
CN201110277856XA 2011-09-16 2011-09-16 Preparation method of modified fly ash for treating ammonia nitrogen waste water CN102357355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110277856XA CN102357355A (en) 2011-09-16 2011-09-16 Preparation method of modified fly ash for treating ammonia nitrogen waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110277856XA CN102357355A (en) 2011-09-16 2011-09-16 Preparation method of modified fly ash for treating ammonia nitrogen waste water

Publications (1)

Publication Number Publication Date
CN102357355A true CN102357355A (en) 2012-02-22

Family

ID=45582767

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110277856XA CN102357355A (en) 2011-09-16 2011-09-16 Preparation method of modified fly ash for treating ammonia nitrogen waste water

Country Status (1)

Country Link
CN (1) CN102357355A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102814473A (en) * 2012-07-31 2012-12-12 马鞍山科润冶金材料有限公司 Preparation method of low-viscosity casting powder for preparing steelmaking cast ingots
CN102825231A (en) * 2012-07-31 2012-12-19 马鞍山科润冶金材料有限公司 Crystallizer covering slag for continuously casting hot rolled steel and manufacturing method of crystallizer covering slag
CN102825227A (en) * 2012-07-31 2012-12-19 马鞍山科润冶金材料有限公司 Continuous casting crystallizer casting powder for high-manganese wear-resistant steel
CN105819887A (en) * 2016-03-08 2016-08-03 武汉大学 Preparation method of non-sintered ceramsite with ammonia nitrogen adsorption function
CN105819891A (en) * 2016-03-08 2016-08-03 武汉大学 Preparation method of sludge ceramsite used for medium and low concentration ammonia nitrogen wastewater treatment
CN106000288A (en) * 2016-06-17 2016-10-12 广东省资源综合利用研究所 Preparing method of rare-earth-carried modified fly ash
CN106076248A (en) * 2016-06-17 2016-11-09 广东省资源综合利用研究所 A kind of preparation method of rare earth modified flyash
CN107684897A (en) * 2017-07-21 2018-02-13 中国环境科学研究院 The denitrifier and its methods and applications prepared using river bottom mud
CN108033592A (en) * 2017-11-27 2018-05-15 浙江师范大学 A kind of processing method of high ammonia-nitrogen wastewater

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101148301A (en) * 2007-08-21 2008-03-26 南京大学 Method for removing ammonia and nitrogen from coking wastewater
CN101428983A (en) * 2008-12-11 2009-05-13 上海电力学院 Method for modification treatment of coal ash

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101148301A (en) * 2007-08-21 2008-03-26 南京大学 Method for removing ammonia and nitrogen from coking wastewater
CN101428983A (en) * 2008-12-11 2009-05-13 上海电力学院 Method for modification treatment of coal ash

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102814473A (en) * 2012-07-31 2012-12-12 马鞍山科润冶金材料有限公司 Preparation method of low-viscosity casting powder for preparing steelmaking cast ingots
CN102825231A (en) * 2012-07-31 2012-12-19 马鞍山科润冶金材料有限公司 Crystallizer covering slag for continuously casting hot rolled steel and manufacturing method of crystallizer covering slag
CN102825227A (en) * 2012-07-31 2012-12-19 马鞍山科润冶金材料有限公司 Continuous casting crystallizer casting powder for high-manganese wear-resistant steel
CN105819887A (en) * 2016-03-08 2016-08-03 武汉大学 Preparation method of non-sintered ceramsite with ammonia nitrogen adsorption function
CN105819891A (en) * 2016-03-08 2016-08-03 武汉大学 Preparation method of sludge ceramsite used for medium and low concentration ammonia nitrogen wastewater treatment
CN106000288A (en) * 2016-06-17 2016-10-12 广东省资源综合利用研究所 Preparing method of rare-earth-carried modified fly ash
CN106076248A (en) * 2016-06-17 2016-11-09 广东省资源综合利用研究所 A kind of preparation method of rare earth modified flyash
CN107684897A (en) * 2017-07-21 2018-02-13 中国环境科学研究院 The denitrifier and its methods and applications prepared using river bottom mud
CN108033592A (en) * 2017-11-27 2018-05-15 浙江师范大学 A kind of processing method of high ammonia-nitrogen wastewater
CN108033592B (en) * 2017-11-27 2021-01-26 浙江师范大学 Treatment method of high ammonia nitrogen wastewater

Similar Documents

Publication Publication Date Title
Xie et al. Removal of phosphate from eutrophic lakes through adsorption by in situ formation of magnesium hydroxide from diatomite
CN103894395B (en) A kind of method that heavy-metal contaminated soil secondary is repaired
Kizito et al. Evaluation of slow pyrolyzed wood and rice husks biochar for adsorption of ammonium nitrogen from piggery manure anaerobic digestate slurry
Ye et al. A critical review on ammonium recovery from wastewater for sustainable wastewater management
Matheickal et al. Biosorption of lead (II) and copper (II) from aqueous solutions by pre-treated biomass of Australian marine algae
Rao et al. Activated carbon from Ceiba pentandra hulls, an agricultural waste, as an adsorbent in the removal of lead and zinc from aqueous solutions
Ramasahayam et al. A comprehensive review of phosphorus removal technologies and processes
Pratt et al. Biologically and chemically mediated adsorption and precipitation of phosphorus from wastewater
Shaheen et al. Heavy metals removal from aqueous solutions and wastewaters by using various byproducts
Cheng et al. Preparation, optimization, and application of sustainable ceramsite substrate from coal fly ash/waterworks sludge/oyster shell for phosphorus immobilization in constructed wetlands
Rakhshaee et al. Kinetic modeling and thermodynamic study to remove Pb (II), Cd (II), Ni (II) and Zn (II) from aqueous solution using dead and living Azolla filiculoides
CN104973919B (en) The method that nitrogen phosphorus prepares slow-release fertilizer in recovery urine
Kizito et al. Phosphate recovery from liquid fraction of anaerobic digestate using four slow pyrolyzed biochars: Dynamics of adsorption, desorption and regeneration
Grace et al. The potential for the use of waste products from a variety of sectors in water treatment processes
CA2546477C (en) Anion-adsorbing carbon material, and method and apparatus for producing same
Li et al. Adsorption of p-nitroaniline from aqueous solutions onto activated carbon fiber prepared from cotton stalk
Li et al. Activation of Firmiana simplex leaf and the enhanced Pb (II) adsorption performance: equilibrium and kinetic studies
CN104478058A (en) Pond-lake heavy-metal pesticide fertilizer pollutant solidifying removing agent and preparation method thereof
Wang et al. Recovery of ammonium and phosphate from wastewater by wheat straw-based amphoteric adsorbent and reusing as a multifunctional slow-release compound fertilizer
CN102266752B (en) Method for preparing carbonizing absorption grains used for purifying water
Verma et al. Kinetic and isotherm modeling of adsorption of dyes onto rice husk carbon
Hsu et al. Adsorption of Cu2+ from water using raw and modified coal fly ashes
CN101811021B (en) Amphiphilic adsorbent capable of adsorbing both organic matter and heavy metal cation and preparation method thereof
CN102249228B (en) Method for preparing activated carbon from pinecone
Ramachandran et al. Adsorption isotherms, kinetics, thermodynamics and desorption studies of reactive Orange 16 on activated carbon derived from Ananas comosus (L.) carbon

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120222