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A kind of heavy metal ion filter paper and preparation method thereof

A technology of heavy metal ions and filter paper, which is applied in the separation method, pulp beating method, filter paper, etc., can solve the problems of high cost and difficulty in the manufacture of adsorption materials, and achieve easy control, popularization and promotion, industrialization, and simplified treatment process Effect

Active Publication Date: 2020-09-29
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthetic adsorption materials can be designed according to the characteristics of the adsorption object and the requirements of adsorption treatment, and generally can achieve better results, but there are often problems such as difficulty in manufacturing the adsorption material and high cost.

Method used

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  • A kind of heavy metal ion filter paper and preparation method thereof
  • A kind of heavy metal ion filter paper and preparation method thereof
  • A kind of heavy metal ion filter paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Take 150kg of coniferous wood pulp and add water to make a slurry with a concentration of 5.0% by mass, beat on a ZDC beater, beat with a light knife for 1.0h, beat with a medium knife for 3h, and beat with a heavy knife for 1.5h, a total of 5.5h. The amount of slurry was determined to be 8.8g, and the beating degree was 90°SR;

[0032] Beat the hardwood pulp under the same conditions, and measure the amount of hanging pulp to be 9.0g, and the degree of beating is 92 ° SR;

[0033] (2) 100 g of softwood pulp wet slurry beaten in step (1) is added to a 1500 mL three-necked bottle, diluted with water to a fiber mass percentage of 0.4%, fully stirred for 2 h, and then 10.15 g of calcium nitrate tetrahydrate is added, After stirring and dissolving, continue to stir for 1.5h, then add solid NaOH to adjust the pH to 10.1; then slowly add 10.85g of ethyl orthosilicate with a mass fraction of 99.0%, continue to react at room temperature for 4h after dripping, and stand for ...

Embodiment 2

[0040] (1) Take 150kg of hardwood pulp and add water to prepare a slurry with a mass percent concentration of 4.5%, beat on a ZDC beater, beat for 1.5 hours with a light knife, 2.5 hours with a medium knife, and 1 hour with a heavy knife, for a total of 5 hours. The amount of slurry was determined to be 8.5g, and the degree of beating was 89°SR;

[0041] Make coniferous wood pulp by the same condition, measure and hang pulp amount to be 8.3g, beating degree is 87 ° SR;

[0042] (2) Take 112g of hardwood pulp wet slurry beaten in step (1) and add it to a 1500mL three-necked bottle equipped with a constant pressure dropping funnel and mechanical agitation, dilute with water until the fiber mass percentage is 0.5%, and fully stir 1h, then add 5.10g of calcium nitrate tetrahydrate, stir to dissolve and continue to stir for 1h, then add solid NaOH to adjust the pH to 9.50; then slowly add 4.54g of orthosilicate ethyl ester with a mass fraction of 99.0%, continue at room temperature...

Embodiment 3

[0045] (1) Take 150kg of coniferous wood pulp and add water to make a slurry with a mass percentage concentration of 4.75%, beat on a ZDC type beater, beat with a light knife for 1.0h, beat with a medium knife for 2.5h, and knock with a heavy knife for 1.5h, a total of 5.0h . The amount of slurry was determined to be 8.8g, and the beating degree was 90°SR;

[0046] Beat the hardwood pulp under the same conditions, and the measured pulping amount is 8.9g, and the degree of beating is 89 ° SR;

[0047] (2) Get 105.3 g of softwood pulp wet slurry beaten in step (1) and join in a 1500 mL three-necked bottle equipped with a constant pressure dropping funnel and mechanical agitation, add water to dilute to a fiber mass percentage of 0.45%, fully Stir for 1.5h, then add 7.60g of calcium nitrate tetrahydrate, stir to dissolve and continue to stir for 1.5h, then add solid NaOH to adjust the pH to 10.10; Continue to react at room temperature for 3.5 hours, let stand and age for 18 hou...

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Abstract

The invention relates to heavy metal ion filter paper and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: fully beating, splitting and brooming wood pulp cellulose in a beating machine; by taking calcium salt as a calcium source, taking ethyl orthosilicate as a silicon source, and taking the wood pulp cellulose as the support and reaction zone, hydrolyzing the ethyl orthosilicate to produce silicate under alkaline conditions, binding with calcium ions to produce calcium silicate to be loaded onto the fibers in situ; mixing softwoodpulp and hardwood pulp loaded with porous calcium silicate according to a certain ratio, adding a wet strength agent, homogenizing and making filter paper. The defect that a template agent generallyneeds to be added during synthesis of porous calcium silicate or synthesis is performed under ultrasonic conditions is overcome, and the produced calcium silicate can be highly dispersed and firmly bound onto the fibers, so that the stability of the cellulose-supported porous calcium silicate filter material is improved. The made filter paper has ability of adsorbing and intercepting heavy metal ions in wastewater, the heavy metals in the wastewater can be removed by virtue of common filtration, and the heavy metal ion filter paper has wide popularization and application value.

Description

technical field [0001] The invention relates to the field of heavy metal wastewater treatment, in particular to a heavy metal ion filter paper and a preparation method thereof. Background technique [0002] More and more heavy metal ions are released into the environment, which has caused serious environmental pollution and endangered people's health. Heavy metal pollution has become one of the most difficult environmental problems in the world. In order to reduce the harm of heavy metals, many efforts have been made to eliminate heavy metals. Adsorption method is one of the most commonly used treatment methods. It is widely favored by the water treatment industry because of its simple treatment process, convenient operation, high treatment efficiency, and suitable for low-concentration, especially advanced treatment of wastewater. The adsorption material is the key to determine the effect of adsorption treatment. Due to their structural limitations, activated carbon, zeo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/08D21D1/02D21C3/02D21H21/20
CPCD21C3/02D21D1/02D21H21/20D21H27/08
Inventor 刘立华刘思焱薛建荣赵露唐安平
Owner HUNAN UNIV OF SCI & TECH
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