Oyster shell powder modified water treatment agent as well as preparation method and application thereof

A technology of oyster shell powder and modified water, which is applied in the field of biomedicine, can solve the problems of high cost of calcination and surfactant, ineffective modification effect of oyster shell, and inconspicuous water treatment ability, and achieve fast and efficient adsorption effect, Excellent stability and durability, excellent effect of repeated use performance

Active Publication Date: 2019-06-11
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modification effect of the modified agent on the oyster shell is not obvious, and the improvement of the treatment ability of the water body is not obvious. 2+ 、Co 2+ The removal rate is low, the adsorption selectivity is poor, and it is easily interfered by other high-content substances; in addition, the cost of calcination and surfactant is high, if it cannot be recycled, it will cause a significant increase in processing costs, limiting its use as an excellent The application prospects of adsorbents; moreover, the reprocessing of modified oyster shell materials is often a big problem, which is easy to cause secondary pollution

Method used

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  • Oyster shell powder modified water treatment agent as well as preparation method and application thereof
  • Oyster shell powder modified water treatment agent as well as preparation method and application thereof
  • Oyster shell powder modified water treatment agent as well as preparation method and application thereof

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Effect test

Embodiment 1

[0047] The preparation of embodiment 1 oyster shell powder modified water treatment agent

[0048] A preparation method of oyster shell powder modified water treatment agent, comprising the following steps:

[0049] S1. Mix oyster shell powder, polyacrylamide and solvent water evenly to obtain a suspension, and add a pH regulator to adjust the pH of the suspension to 7.5; wherein, the amount of polyacrylamide added is 15% of the mass of oyster shell powder;

[0050] S2. Ultrasonic emulsification suspension, heated at 80°C for 120 minutes with constant magnetic stirring, cooled to room temperature, centrifuged for 4 to 8 times, dried and pulverized at 70°C, passed through a 100-mesh sieve to obtain modified oyster shell powder;

[0051] S3. Mix the modified oyster shell powder with sodium carboxymethyl cellulose (the mass ratio of modified oyster shell powder to sodium carboxymethyl cellulose is 30:1), stir evenly, add water to make it coagulate Finally, a hollow ring adsorben...

Embodiment 2

[0052] The preparation of embodiment 2 oyster shell powder modified water treatment agent

[0053] A preparation method of oyster shell powder modified water treatment agent, comprising the following steps:

[0054] S1. Mix oyster shell powder, polyacrylamide and solvent water evenly to obtain a suspension, and add a pH regulator to adjust the pH of the suspension to 8; wherein, the amount of polyacrylamide added is 20% of the mass of oyster shell powder;

[0055] S2. Ultrasonic emulsified suspension, heated at 70°C for 150 minutes with constant magnetic stirring, cooled to room temperature, centrifuged for 4 to 5 times, dried and pulverized at 70°C, passed through a 100-mesh sieve to obtain modified oyster shell powder;

[0056] S3. Mix the modified oyster shell powder with sodium carboxymethyl cellulose (the mass ratio of modified oyster shell powder to sodium carboxymethyl cellulose is 35:1), stir evenly, add water to make it coagulate Finally, make a hollow ring adsorbent...

Embodiment 3

[0057] The preparation of embodiment 3 oyster shell powder modified water treatment agent

[0058] A preparation method of oyster shell powder modified water treatment agent, comprising the following steps:

[0059] S1. Mix oyster shell powder, polyacrylamide and solvent water evenly to obtain a suspension, and add a pH regulator to adjust the pH of the suspension to 7; wherein, the amount of polyacrylamide added is 20% of the mass of oyster shell powder;

[0060] S2. Ultrasonic emulsified suspension, heated at 90°C for 90 minutes with constant magnetic stirring, cooled to room temperature, centrifuged for 4 to 5 times, dried and pulverized at 70°C, passed through a 100-mesh sieve to obtain modified oyster shell powder;

[0061] S3. Mix the modified oyster shell powder with sodium carboxymethyl cellulose (the mass ratio of modified oyster shell powder to sodium carboxymethyl cellulose is 30:1), stir evenly, add water to make it coagulate Finally, make a hollow ring adsorbent,...

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Abstract

The invention discloses an oyster shell powder modified water treatment agent as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing oyster shell powder, polyacrylamide (PAM) and a solvent, and adding a pH adjusting agent to adjust the pH; performing ultrasonic emulsification, performing stirring heating at 50-90 DEG C for 30-150 min, performing cooling to a room temperature, performing centrifugal separation, performing drying crushing, and performing sieving to obtain modified oyster shell powder; and uniformly mixing the modified oyster shell powder and carboxymethyl cellulose sodium, performing natural drying, performing calcination at medium and low temperature, and performing cooling to obtain the oyster shell powder modified water treatment agent. The oyster shell powder modified water treatment agent provided by the invention has a faster and more efficient adsorption effect on heavy metal ions such as Ni<2+>, Co<2+> and Cu<2+>, and excellent stability and durability, effectively realizes the purpose of using waste to treat waste, belongs to high-efficiency environmentally-friendly adsorption separation materials, and has good application value.

Description

technical field [0001] The invention belongs to the technical field of biomedicine. More specifically, it relates to an oyster shell powder modified water treatment agent and its preparation method and application. Background technique [0002] Oysters are the economical shellfish with the largest farming output in China. While we enjoy the delicious food, we also produce a lot of discarded oyster shells. At present, there is relatively little processing of oyster shells in my country, and most oyster shells are discarded or landfilled, and some organic matter in oyster shells will deteriorate due to long-term stacking, causing environmental pollution and waste of resources. Oysters have left and right shells, the right shell is also called the upper shell, and the left shell is also called the lower shell. The oyster shell is divided into three layers according to the formation method and tissue structure: the outermost layer is the cuticle or cortex (periostracum), which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
Inventor 谷长生李泳张兆霞郝晓敏洪鹏志蔡鹰孙省利余传明景占鑫廖铭能
Owner GUANGDONG OCEAN UNIVERSITY
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