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Preparation method for polystyrene-resin-loaded nano zero valent iron, and application of polystyrene-resin-loaded nano zero-valent iron to oily wastewater

A polystyrene resin, nano-zero valent iron technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, reduced water/sewage treatment, etc. small space, good dispersibility and simple preparation method

Inactive Publication Date: 2012-06-13
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of high cost and poor oil removal performance of oily wastewater treatment materials, the present invention provides a preparation method of polystyrene resin loaded nanometer zero-valent iron and its application in oily wastewater

Method used

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  • Preparation method for polystyrene-resin-loaded nano zero valent iron, and application of polystyrene-resin-loaded nano zero-valent iron to oily wastewater
  • Preparation method for polystyrene-resin-loaded nano zero valent iron, and application of polystyrene-resin-loaded nano zero-valent iron to oily wastewater
  • Preparation method for polystyrene-resin-loaded nano zero valent iron, and application of polystyrene-resin-loaded nano zero-valent iron to oily wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of polystyrene resin-loaded nano-zero-valent iron materials:

[0021] (1) Treat the resin with 4mol / L hydrochloric acid for 1 hour to exchange the sodium ions on the surface of the resin for H + , and rinsed with distilled water.

[0022] (2) FeSO 4 ·7H 2 O and the treated resin are added according to the mass ratio of 1:5, that is, 5g:25g is added to 100ml of distilled water, and then 1g of polyvinylpyrrolidone is added, put into a magnetic stirrer with water, and exchanged for 1h under magnetic stirring, Guaranteed all Fe 2+ Exchange to the surface of the cation exchange resin, and then wash the exchanged resin with distilled water to remove the unexchanged Fe on the resin surface 2+ .

[0023] (3) Prepare 0.2mol / L NaBH with distilled water 4 solution, transfer 20g of the resin in (2) to a beaker filled with 100ml of distilled water, and slowly add 100ml of NaBH under the action of magnetic stirring 4 solution, the resin quickly changed from light y...

Embodiment 2

[0027] 1 Determination of oil concentration by ultraviolet method

[0028] Preparation of solution

[0029] (1) Standard oil: use 30-60°C petroleum ether to extract oil from the collected steel rolling oily wastewater samples, dehydrate and filter through anhydrous sodium sulfate, put the filtrate on a (65±5°C) water bath to evaporate petroleum ether, and then Drain the remaining petroleum ether in a thermostat (65±5°C) to obtain the standard oil.

[0030] (2) Standard oil stock solution: Weigh standard oil (0.100±0.001) g and dissolve it in petroleum ether, transfer it into a 100ml volumetric flask, dilute to the mark line, and store in the refrigerator. 1ml of this solution contains 1.00mg of oil.

[0031] (3) Standard oil solution: Before use, take 10ml of standard oil stock solution and transfer it into a 100ml volumetric flask, then dilute to the marked line. 1ml of this solution contains 0.10mg of oil.

[0032] Drawing of standard curve

[0033] (1) First scan to the...

Embodiment 3

[0053] The calculation method of oil concentration measurement method, turbidity measurement method, oil removal rate and turbidity removal rate is the same as shown in embodiment 2 in this example.

[0054] Prepare oily wastewater with an initial concentration of 146mg / L and a turbidity of 203NTU. Use a 150ml Erlenmeyer flask as a reactor, add 2g of polystyrene resin loaded with nanometer zero-valent iron to the bottle, and then add 100ml of oily wastewater at a temperature of 40 °C, the reaction time is 30 min on a constant temperature SHA-B oscillator at a rotation speed of 180 rpm. After the reaction, it was left to stand for 1 hour, and water samples were taken for measurement according to the oil concentration and turbidity in Example 2, and the oil removal rate and turbidity removal rate were 93.87% and 77.34% respectively.

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Abstract

The invention discloses a preparation method for polystyrene-resin-loaded nano zero valent iron, and application of the polystyrene-resin-loaded nano zero valent iron to oily wastewater. According to the preparation method, ferrous ions are reduced to nano zero valent iron by using sodium borohydride as a reducing agent, and reaction conditions, dripping speed and stirring speed are controlled to guarantee that the particle diameter of the nano zero valent iron particles formed by reaction is less than 100nm; and in the reaction process, pretreated strongly acidic polystyrene cation exchange resin is used as a loading material, and nano zero valent iron particles which are produced by reaction are fully dispersed and loaded on the resin by using pores of the resin. The preparation method has the advantages of simplicity, low cost, no special requirement on external environment condition and small occupied space; the prepared material is applied to treatment of the oily wastewater at low concentration, and integrates the adsorption performance of the resin and strong reducibility of nano zero valent iron; and the deoiling rate reaches over 90 percent and turbidity removal rate reaches over 75 percent.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation and oily wastewater treatment, and in particular relates to a preparation method of polystyrene cationic resin loaded nanometer zero-valent iron and its application in oily wastewater. Background technique [0002] Oily wastewater mainly comes from petroleum, petrochemical, coking, machining, shipping, steel and other industries. The harm of oily wastewater to the environment and water and soil is manifold. With the development of society, the improvement of production technology, the requirements of effluent water quality and the comprehensive sewage discharge standards are becoming increasingly stringent. The existing treatment technology and equipment can no longer meet the current requirements of oily wastewater treatment, and the most important thing for wastewater treatment is the treatment materials. s Choice. Therefore, it is imperative to seek new materials with e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/70
Inventor 马淞江贾海武李方文李军陈仁付美玲杨娟吴年芬
Owner HUNAN UNIV OF SCI & TECH
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