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Reproducible water treatment agent for cleaning trace aromatic hydrocarbon and derivatives of trace aromatic hydrocarbon with high efficiency, manufacture method and application of reproducible water treatment agent

A technology for aromatic hydrocarbons and regenerated water, which is applied in the fields of adsorption water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc. It can solve the problems of difficult preparation technology, small contact probability of pollutants, and easy mutual aggregation.

Inactive Publication Date: 2013-06-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the contact probability between common hydrophobic materials and pollutants in water is very small, and it is difficult to quickly capture aromatic hydrocarbons in water
Reducing the particle size of the material is an effective way to increase the contact area, but it is difficult in the preparation technology, because the hydrophobic organic micro-particles are easy to aggregate with each other in water

Method used

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  • Reproducible water treatment agent for cleaning trace aromatic hydrocarbon and derivatives of trace aromatic hydrocarbon with high efficiency, manufacture method and application of reproducible water treatment agent
  • Reproducible water treatment agent for cleaning trace aromatic hydrocarbon and derivatives of trace aromatic hydrocarbon with high efficiency, manufacture method and application of reproducible water treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 (Synthesis of silica-supported water treatment agent)

[0026] Synthesis of Glyceryl Ether Functionalized Azobenzenes (AZ). Dissolve 3.96 g (20 mmol) of p-hydroxyazobenzene, 2.5 g (20 mmol), 2-(2-chloroethyl)ethanol in 75 ml of dimethylformamide, add K 2 CO 3 (2.76 grams), KI (0.37 grams), heated to 110 degrees under stirring for 18 hours. The reactant was poured into 500 ml of cold water, and K 2 CO 3 Adjust the pH to 11, filter, collect the solid, and wash with water. The solid was dissolved in dichloromethane and dried over sodium sulfate. Inorganic salts and organic solvents were removed, and vacuum drying gave 3.86 g of a reddish-brown solid (67.5%). 1 H NMR (DMSO-d 6 , ε / ppm): 7.88 (m, 4H, ArH), 7.58 (m, 3H, ArH), 7.16 (m, 2H, ArH), 4.71 (s, 1H, OH), 4.21 (t, 2H, PhOCH 2 ), 3.78 (t, 2H, PhOCH 2 -C H 2 ), 3.52 (t, 4H, C H 2 C H 2 OH). The above product and epichlorohydrin (6.24 g, 67.5 mmol) were dissolved in 20 ml of dimethyl sulfoxide...

Embodiment 2

[0028] Embodiment 2 (synthesis of silica loaded water treatment agent)

[0029] In Example 1, a similar synthesis was carried out with 9-anthracenylmethanol instead of p-hydroxyazobenzene. α-Anthracenemethyl-ω-glyceryl ether-diethylene glycol (An) is obtained. 1 H NMR (DMSO-d6, ε / ppm): 8.42, 8.04, 7.56, 7.49 (aromatic proton, 9H), 5.59 (An-CH 2 ), 4.25 (t, 2H, PhOCH 2 ), 4.06 and 3.72 (m, 2H, glyceryl ether exocyclic CH 2 ), 3.60-3.90 (m, 6H, OCH 2 ), 3.18 (m, 1H, C of glyceryl ether H ), 2.82 and 2.62 (C of the glyceryl ether ring H 2 ). In the second step, this compound (0.12 g), polyamine (0.8 g), glyceryl ether functionalized PEG (0.2 g) and 10 ml of chloroform were mixed and stirred at reflux for 4 days. Filter, wash with ethanol several times, and dry to obtain the water treatment agent SiO 2 PEIAn / PEG 1.03 g. Thermogravimetric analysis in the presence of oxygen indicated an organic loading of 22%.

Embodiment 3

[0030] Example 3 (Purification treatment of wastewater containing aromatic hydrocarbon pyrene)

[0031] Weigh 5 mg of pyrene, make it into 10 ml of acetone solution, take 140 microliters from it and put it into a single-necked flask, volatilize the acetone, make it into 500 ml of phosphate buffer solution, and ultrasonically treat it for ten minutes to get a saturated aqueous solution of pyrene (saturated Solubility is 6.8 × 10 -7 mol / L, or 137 ppb).

[0032] Prepare 11 bottles of the above-mentioned saturated solution of pyrene, then add water treatment agent SiO in each bottle respectively 2 PEIAZ / PEG 3, 6, 12, 24, 48, 96, 192, 384, 768, 1536, 3072 mg with vigorous magnetic stirring for 2 days. Filter or centrifuge to remove the water treatment agent, and then perform fluorescence spectrum detection.

[0033] Fluorescence spectrum detection was carried out on RF-5301PC (Shimadzu) fluorescence spectrometer. The excitation wavelength was 335 nm and the recorded emission...

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Abstract

The invention relates to a reproducible water treatment agent for cleaning trace aromatic hydrocarbon and derivatives of the trace aromatic hydrocarbon with high efficiency, a manufacture method and application of the reproducible water treatment agent. High-density aromatic groups and polyethylene glycol chains are simultaneously connected on silica load polyamine particles above a millimeter level in size. The aromatic groups forms a hydrophobic microcell with a high surface due to microphase separation, and a trace hydrophobic aromatic hydrocarbon compound can be rapidly captured in water. Hydraulic polyethylene glycol chains facilitate microphase separation and contact of water. Polyamine in a middle layer has cation characteristics due to protonation of water and can capture the trace anion aromatic hydrocarbon derivatives in the water with high efficiency. The carrier silica particles are above the millimeter level in size so as to be conveniently filtered or centrifuged out from the water. The water treatment agent is stable in performance and capable of resisting acid-bases inorganic salt. Fluorescence detection shows that the water treatment agent can rapidly clean various aromatic hydrocarbon compounds in water, especially the trace aromatic hydrocarbon, for example, the concentration of pyrene can be reduced to about 0.5ppb from saturated 137ppb, and the water treatment agent is particularly suitable for treatment of drinking water with trace aromatic pollutants. The water treatment agent processed and used by an organic solvent can recover to have the capacity of capturing oleophylic aromatic hydrocarbon, and the water treatment agent after treatment of alkaline water can recover to have the capacity of capturing hydraulic aromatic hydrocarbon.

Description

technical field [0001] The invention belongs to adsorption functional materials and water purification materials, in particular to a class of renewable water treatment agents capable of efficiently removing trace aromatic hydrocarbons and their derivatives in water, a preparation method and applications thereof. Background technique [0002] The governance of organic pollutants is an urgent challenge faced by all mankind today. In 1996, the U.S. Department of Environmental Protection listed 129 priority pollutants "blacklist", organic matter accounted for about 86%, of which aromatic hydrocarbons and their derivatives are the main ones, such as aromatic hydrocarbons, halogenated aromatic hydrocarbons, phenols, aniline kind. These compounds are called persistent organic pollutants because of their high toxicity and refractory degradation. Aromatic hydrocarbon pollutants continue to be supplied to humans through water sources, plant foods, and animal foods due to insoluble, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28C02F101/32
Inventor 万德成金明浦鸿汀
Owner TONGJI UNIV
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