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Environment-friendly KGM (konjac glucomannan)-based cationic dye trapping and settling agent as well as preparation method and application

A technology of konjac glucomannan and cationic dyes, which is applied in chemical instruments and methods, water pollutants, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of inability to quickly treat dye wastewater and slow settling speed, and it is not easy to achieve The effects of secondary pollution, less sludge, simple preparation and use process

Inactive Publication Date: 2018-03-23
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defect of chitosan degradable coagulant to treat dye wastewater is that the sedimentation speed is slow, and it cannot quickly treat dye wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] It is an environment-friendly konjac glucomannan-based cationic dye capture and sedimentation agent, and the preparation steps are as follows:

[0024] Step 1 Synthesis of KGM-g-P(MAA-r-NVF)

[0025]Take 1 part of konjac glucomannan (KGM), add 100 parts of water, control the temperature at 45°C, and dissolve for 0.5 hours; under the protection of nitrogen, add 0.2 parts of the initiator azobisisobutylamidine hydrochloride V-50, 10 parts of methacrylic acid (MAA) and 5 parts of N-vinylformamide (NVF), polymerize for 2 hours, cool down to stop the reaction; add 100 parts of ethanol for precipitation separation, filter and dry, High-purity konjac glucomannan-graft-poly(methacrylic acid-random-N-vinylformamide) copolymer (KGM-g-P(MAA-r-NVF)) was obtained; elemental analysis and NMR Instrumental analysis measures the grafting rate of methacrylic acid to be 27%, and the grafting rate of N-vinylformamide is 5%;

[0026] Step 2 Synthesis of 1,2-cyclohexanediaminetetraacetic d...

Embodiment 2

[0034] It is an environment-friendly konjac glucomannan-based cationic dye capture and sedimentation agent, and the preparation steps are as follows:

[0035] Step 1 Synthesis of KGM-g-P(MAA-r-NVF)

[0036] Take 2 parts of konjac glucomannan (KGM), add 250 parts of water, control the temperature at 50°C, and dissolve for 0.7 hours; under the protection of nitrogen, add 0.4 parts of the initiator azobisisobutylamidine hydrochloride Salt V-50, 25 parts of methacrylic acid (MAA) and 20 parts of N-vinylformamide (NVF), graft copolymerization for 5 hours, cooling down to stop the reaction; adding 250 parts of ethanol for precipitation separation, filtration and drying Afterwards, high-purity konjac glucomannan-graft-poly(methacrylic acid-random-N-vinyl formamide) copolymer (KGM-g-P(MAA-r-NVF)) was obtained; NMR instrument analysis measures the grafting rate of methacrylic acid to 45%, and the N-vinyl formamide grafting rate is 11%;

[0037] Step 2 Synthesis of 1,2-cyclohexanediam...

Embodiment 3

[0045] It is an environment-friendly konjac glucomannan-based cationic dye capture and sedimentation agent, and the preparation steps are as follows:

[0046] Step 1 Synthesis of KGM-g-P(MAA-r-NVF)

[0047] Take 4 parts of konjac glucomannan (KGM), add 350 parts of water, control the temperature at 60°C, and dissolve for 0.7 hours; under the protection of nitrogen, add 0.7 parts of the initiator azobisisobutylamidine hydrochloride V-50, 35 parts of methacrylic acid (MAA) and 25 parts of N-vinylformamide (NVF), graft copolymerization for 15 hours, cooling down to stop the reaction; adding 350 parts of ethanol for precipitation separation, filtration and drying, High-purity konjac glucomannan-graft-poly(methacrylic acid-random-N-vinylformamide) copolymer (KGM-g-P(MAA-r-NVF)) was obtained; elemental analysis and NMR The grafting rate of methacrylic acid measured by instrumental analysis is 67%, and the grafting rate of N-vinylformamide is 15%;

[0048] Step 2 Synthesis of 1,2-c...

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Abstract

The invention relates to an environment-friendly KGM (konjac glucomannan)-based cationic dye trapping and settling agent as well as a preparation method and an application. The environment-friendly KGM-based cationic dye trapping and settling agent is characterized by being prepared from KGM, water, initiator azobis(isobutylamidine) hydrochloride V-50, MAA (methacrylic acid), NVF (N-vinylformamide), 1,2-CDTAD (cyclohexanediamine tetraacetic acid dianhydride), potassium hydroxide and carbon disulfide, and the environment-friendly KGM-based cationic dye trapping and settling agent is used for treating cationic dye wastewater drained in the dye synthesis or dyeing and finishing process and wastewater drained by the artistic coating industry. The environment-friendly KGM-based cationic dye trapping and settling agent has the advantages of being high in trapping capability and settling speed, capable of treating low-concentration complexing heavy metal ions, trapping dye molecules and complexing heavy metal ions in a few seconds and growing into large settling particles rapidly to achieve the purpose of rapid separation of dye and heavy metal ions, non-toxic, environmentally friendly, easy to decompose after being abandoned, free from causing secondary pollution in the use process, simple to operate, low in treatment cost, high in adaptability and the like.

Description

technical field [0001] The invention belongs to the field of biomass materials and wastewater treatment, and in particular relates to an environmentally friendly konjac glucomannan-based cationic dye capture and sedimentation agent and its preparation method and application; it is mainly a cationic dye discharged during dye synthesis or dyeing and finishing Used in dye wastewater and wastewater discharged from the art paint industry. Background technique [0002] In recent years, my country's annual sewage discharge has reached more than 39 billion tons, of which industrial sewage accounts for 51%, while dye wastewater accounts for 35% of the total industrial wastewater discharge, and it is increasing at a rate of 1% year by year. Dye wastewater is composed of dyes and auxiliaries discharged during the synthesis or dyeing and finishing process, mainly from dye synthesis and dye use enterprises, such as printing and dyeing industry and coating industry. With the rapid develo...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F226/02C08F8/30C08F8/34C02F1/56C02F101/20C02F101/30
CPCC08F251/00C02F1/56C02F2101/20C02F2101/308C08F8/30C08F8/34C08F220/06C08F226/02
Inventor 刘锋路风辉陈燕舞霍应鹏张浥琨郭志杰洪丹彭琦唐秋实
Owner SHUNDE POLYTECHNIC
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