CN101857290B - Preparation method of chitosan coated bauxite printing and dying industry wastewater flocculating agent - Google Patents
Preparation method of chitosan coated bauxite printing and dying industry wastewater flocculating agent Download PDFInfo
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- CN101857290B CN101857290B CN2010101331107A CN201010133110A CN101857290B CN 101857290 B CN101857290 B CN 101857290B CN 2010101331107 A CN2010101331107 A CN 2010101331107A CN 201010133110 A CN201010133110 A CN 201010133110A CN 101857290 B CN101857290 B CN 101857290B
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Abstract
The invention relates to chitosan coated bauxite printing and dying industry wastewater flocculating agent and preparation method thereof, relating to the water treatment medicament technical field. Chitosan, natural bauxite and industrial hydrochloric acid are taken as raw materials, are mixed and stirred by ratio and sequence and then are subject to baking or microwave drying, thus obtaining the composite flocculating agent product. Deacetylated degree of chitosan is more than 70%, the fineness of the natural bauxite is 200 meshes, and the ratio of the chitosan and bauxite is 1:10-15(g/g). The main raw material of the invention is natural bauxite and can be reused, cost is low, preparation process is simple, and decolouring effects on active dye, reducing dye, dispersing dye, direct dye and sulphide dye are all good. The invention has the characteristics of economy, high efficiency, no secondary pollution and environmental protection.
Description
Technical field
The present invention relates to the water treatment agent technical field, particularly relate to a kind of chitosan that utilizes and coat ecological composite efficient printing and dying industry wastewater flocculating agent that natural clay mineral is prepared into and preparation method thereof.
Background technology
Traditional inorganic flocculating agent is higher to hydrophobic dye, dye decolored efficient that relative molecular mass is bigger; But it is relatively poor to good water solubility, reactive dyestuffs decolorizing effect that relative molecular mass is little; And organic polymer coargulator such as SEPIGEL 305 consumption are few, flocculation rate fast, it is few to generate sludge quantity, but secondary pollution and price height are arranged; Though treatment with chitosan waste water from dyestuff non-secondary pollution, pH require high, flco link poor performance, loose particles, settling property is poor, and cost is high.Inorganic modified, inorganic organic composite type flocculation agent can overcome the deficiency of single flocculation agent, when reducing processing cost, improves processing efficiency, has become one of focus of research.Natural bauxitic clay has research and application as a kind of mineral material cheap and easy to get in water treatment field; With it is main raw material and a small amount of compound preparation ecological type composite flocculant of chitosan; Improve its decolorizing effect, have great economy and environmental benefit good water solubility, reactive dyestuffs that relative molecular mass is little.
Summary of the invention
The objective of the invention is to solve complicated process of preparation, cost that existing treatment of dyeing wastewater flocculation agent exists high, have secondary pollution, to the decolorizing effect difference problem of the little dyestuff of good water solubility or relative molecular mass, proposes a kind of chitosan coating natural clay mineral that utilizes and prepares ecological composite efficient printing and dying industry wastewater flocculating agent and preparation method thereof.
The objective of the invention is to realize through following technical scheme:
Chitosan coated bauxite printing and dying industry wastewater flocculating agent is made up of chitosan and bauxitic clay component, and the amount ratio of its chitosan and bauxitic clay is 1: 10～1: 15 (g/g).
Described chitosan coated bauxite printing and dying industry wastewater flocculating agent, its chitosan be deacetylation greater than 70%, molecular weight is 1 * 10
6The natural bauxitic clay that bauxitic clay produces for Benxi, Liaoning, its chemical constitution is for containing Al
2O
336.56%, SiO
218.7%, Fe
2O
31.84%, MgO 0.74%, loss on ignition 14.56%.
The chitosan coated bauxite printing and dying industry wastewater flocculating agent preparation method comprises the process of being prepared as follows: at first chitosan is dissolved in 1% hydrochloric acid soln and fully stir, process 5% chitosan salt acid solution; Natural bauxitic clay grinds the back and crosses 200 mesh sieves, and 600 ℃ of roasting 1h join the bauxitic clay after the roasting in the chitosan salt acid solution then gradually; Fully stir while adding; Place 105 ℃ of dryings of thermostatic drying chamber or microwave drying, be ground into powder, promptly be prepared from.
Described chitosan coated bauxite printing and dying industry wastewater flocculating agent preparation method; Behind its flocculation agent absorbing dye under 500 ℃ of conditions roasting 40min; After removing dyestuff, chitosan organism, bauxitic clay coats preparation type flocculation agent again with chitosan, has realized the recycling to bauxitic clay.
Advantage of the present invention and effect are:
(1) starting material of preparation flocculation agent derive from nature, and reserves are abundant, and bauxitic clay is reusable, and are with low cost.
(2) preparation technology is simple, and is easy to use, and reactive dyestuffs, vat, dispersed dye, substantive dyestuff and thioxine dyes etc. are all had decolorizing effect preferably.Simultaneously settling of floccus is fast, solid, sludge quantity is few, has economy, efficient, non-secondary pollution, characteristics such as environmentally friendly.
Embodiment
Below through the practical implementation instance preparation method of the present invention and use are described further.
Embodiment 1: the 10g chitosan is dissolved in the 200mL1% hydrochloric acid soln, fully stir, process 5% chitosan salt acid solution.Natural bauxitic clay grinds the back and crosses 200 mesh sieves, 600 ℃ of roasting 1h of retort furnace.The bauxitic clay that takes by weighing after the 100g roasting joins in the chitosan salt acid solution; Fully stir while adding; Place 105 ℃ of dryings of thermostatic drying chamber or microwave drying, be ground into powder, promptly be prepared into chitosan and bauxitic clay mass ratio and be 1: 10 environmental composite highly effective printing and dying industry wastewater flocculating agent.Under the condition of pH=5, concentration of treatment is 100mg/L printing and dyeing mill 12 kinds of dyestuff simulated wastewaters commonly used with this composite flocculation agent, and its decolouring the results are shown in Table 1.
Table 1 mass ratio is that 1: 10 composite flocculation agent is to various decoloring dye waste water effects
Embodiment 2: the 10g chitosan is dissolved in the 200mL1% hydrochloric acid soln, fully stir, process 5% chitosan salt acid solution.Natural bauxitic clay grinds the back and crosses 200 mesh sieves, 600 ℃ of roasting 1h of retort furnace.The bauxitic clay that takes by weighing after the 150g roasting joins in the chitosan salt acid solution; Fully stir while adding; Place 105 ℃ of dryings of thermostatic drying chamber or microwave drying, be ground into powder, promptly be prepared into chitosan and bauxitic clay mass ratio and be 1: 15 environmental composite highly effective printing and dying industry wastewater flocculating agent.Use this composite flocculation agent concentration of treatment to be 100mg/L printing and dyeing mill 12 kinds of dyestuff simulated wastewaters commonly used, its decolouring
The result sees table 2.
Table 2 mass ratio is that 1: 15 composite flocculation agent is to various decoloring dye waste water effects
Embodiment 3: the method by embodiment 1 prepares composite flocculation agent; After composite flocculation agent is used for reactive brilliant red X3B simulated wastewater that concentration of treatment is 100mg/L; Flco is roasting 40min under 500 ℃ of conditions, and behind the organism such as removal dyestuff, chitosan, it is 1: 10 composite flocculant that bauxitic clay uses chitosan to coat the preparation quality ratio again; Be used further to handle reactive brilliant red X3B simulated wastewater, its recycling is seen table 3 to the decolouring result of dyestuff.
Table 3: the recycling effect of bauxitic clay
Claims (2)
1. the chitosan coated bauxite printing and dying industry wastewater flocculating agent preparation method is characterized in that comprising the process of being prepared as follows: at first chitosan is dissolved in 1% hydrochloric acid soln and fully stir, process 5% chitosan salt acid solution; Natural bauxitic clay grinds the back and crosses 200 mesh sieves, and 600 ℃ of roasting 1h join the bauxitic clay after the roasting in the chitosan salt acid solution then gradually; Fully stir while adding; Place 105 ℃ of dryings of thermostatic drying chamber or microwave drying, be ground into powder, promptly be prepared from;
The amount ratio of chitosan and bauxitic clay is 1: 10～1: 15 (g/g); Chitosan be deacetylation greater than 70%, molecular weight is 1 * 10
6The bauxitic clay chemistry consists of and contains Al
2O
336.56%, SiO
218.7%, Fe
2O
31.84%, MgO 0.74%, loss on ignition 14.56%.
2. chitosan coated bauxite printing and dying industry wastewater flocculating agent preparation method according to claim 1; It is characterized in that behind the flocculation agent absorbing dye roasting 40min under 500 ℃ of conditions; After removing dyestuff, chitosan organism, bauxitic clay coats the preparation flocculation agent again with chitosan.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101331107A CN101857290B (en) | 2010-03-26 | 2010-03-26 | Preparation method of chitosan coated bauxite printing and dying industry wastewater flocculating agent |
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| CN2010101331107A CN101857290B (en) | 2010-03-26 | 2010-03-26 | Preparation method of chitosan coated bauxite printing and dying industry wastewater flocculating agent |
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| CN101857290A CN101857290A (en) | 2010-10-13 |
| CN101857290B true CN101857290B (en) | 2012-05-23 |
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| CN110436552A (en) * | 2019-08-23 | 2019-11-12 | 河南亿群环保科技有限公司 | A kind of sewage treatment precipitating reagent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418825A (en) * | 2002-12-12 | 2003-05-21 | 中国科学院生态环境研究中心 | High efficiency algae flooculation agent, method for treating red tide and plakton bloom using same |
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2010
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418825A (en) * | 2002-12-12 | 2003-05-21 | 中国科学院生态环境研究中心 | High efficiency algae flooculation agent, method for treating red tide and plakton bloom using same |
Non-Patent Citations (2)
| Title |
|---|
| 王擎.壳聚糖包覆粉煤灰对模拟染料废水的脱色实验研究.《中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅰ辑》.2006,(第9期),第24-25页. * |
| 赵小峰等.新型吸附材料蛋自石页岩.《北方环境》.2005,第30卷(第2期),第62-63页. * |
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Granted publication date: 20120523 Termination date: 20180326 |