CN108236929A - A kind of attapulgite of surface modification and the purposes as adsorbent - Google Patents

A kind of attapulgite of surface modification and the purposes as adsorbent Download PDF

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Publication number
CN108236929A
CN108236929A CN201611224294.1A CN201611224294A CN108236929A CN 108236929 A CN108236929 A CN 108236929A CN 201611224294 A CN201611224294 A CN 201611224294A CN 108236929 A CN108236929 A CN 108236929A
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CN
China
Prior art keywords
attapulgite
modification
distilled water
reaction kettle
chitosan
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Application number
CN201611224294.1A
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Chinese (zh)
Inventor
谢越
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海门市源美美术图案设计有限公司
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Priority to CN201611224294.1A priority Critical patent/CN108236929A/en
Publication of CN108236929A publication Critical patent/CN108236929A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/12Naturally occurring clays or bleaching earth
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/288Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00Aspects relating to sorbent materials
    • B01J2220/40Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4825Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • C02F2101/22Chromium or chromium compounds, e.g. chromates

Abstract

A kind of attapulgite the invention discloses surface modification and the purposes as adsorbent, the attapulgite of surface modification are prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, add in distilled water, transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace and is reacted after ultrasonic disperse;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, is ground up, sieved the rear attapulgite up to the surface modification.The attapulgite of surface modification provided by the invention can be as the adsorbent of Cr VI.

Description

A kind of attapulgite of surface modification and the purposes as adsorbent
Technical field
The invention belongs to Material Fields, and in particular to a kind of attapulgite of surface modification and the purposes as adsorbent.
Background technology
Heavy metal chromium mainly exists in water body in the form of (VI) two kind of Cr (III) and Cr, and wherein Cr (VI) is a kind of acute Carcinogen, migration and toxicity are far above Cr (III).Cr (VI) in Environmental Protection Agency and World Health Organization's regulation drinking water Content≤0.05mgL-1.Cr (VI) content≤0.05mgL-1 in drinking water is provided in China's water standard, in surface water Cr (VI) content≤0.15mgL-1, Cr (VI) and the maximum allowable concentration of emission of total chromium are 0.05 He in waste discharge 0.15mg·L-1.Therefore chromium in water removal is removed, especially Cr (VI) is of great significance to protection public health and ecological environment. At present, the main methods of chromate waste water have chemical precipitation method, solvent extraction method, hyperfiltration, reduction method and absorption method etc.. Since absorption method has many advantages, such as that easy to operate, cost is relatively low, high treating effect, processing waste water containing chrome is had been widely used for.
Clay mineral attapulgite has many advantages, such as good absorption property and cheap is widely used in water process Field, but it is relatively low to the adsorbance of anion such as Cr (VI).Have in recent years scholar using hydrothermal carbonization method to attapulgite into Row is organically-modified, so as to improve the absorption property of attapulgite.This is because attapulgite surface is grafted-CH ,-OH, > C =O, > C=C and-COOH etc. organo-functional groups.Common carbon source has glucose, xylose, fructose, sucrose, cellulose and monoxone Deng.Chitosan, a kind of natural cationic polysaccharide prepared by by chitin deacetylation have biocompatibility, environment The features such as friendly, contains abundant hydroxyl and amino isoreactivity group on strand.Chitosan alone is in higher pH condition Under to heavy metal ion(Such as Cu2+, Cd2+ and Pb2+)With good absorption property.On the contrary, the acidity the strong more is conducive to shell Glycan Adsorption Cr (VI).But easily softening is lost in chitosan in acid condition, limits its practical application.
Invention content
A kind of attapulgite the object of the present invention is to provide surface modification and the purposes as adsorbent.
Above-mentioned purpose is achieved by the following technical solution:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Further, 4-8 times of quality for attapulgite of the quality of the chitosan.
Further, 1g attapulgites add in distilled water 15-35mL.
Further, 220-280 DEG C of high temperature furnace temperature.
Further, hydro-thermal 18-26 hours.
Further, drying temperature is 50-60 DEG C.
Purposes of the attapulgite of above-mentioned surface modification as Cr VI adsorbent.
Beneficial effects of the present invention:
The attapulgite of surface modification provided by the invention can be as the adsorbent of Cr VI.
Specific embodiment
Intend specifically introducing the technical solution of the invention below by specific embodiment.
Embodiment 1:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Wherein, 6 times of quality for attapulgite of the quality of the chitosan.
Wherein, 1g attapulgites add in distilled water 25mL.
Wherein, 250 DEG C of high temperature furnace temperature, hydro-thermal 22 hours.
Wherein, drying temperature is 55 DEG C.
Embodiment 2:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Wherein, 4 times of quality for attapulgite of the quality of the chitosan.
Wherein, 1g attapulgites add in distilled water 15mL.
Wherein, 220 DEG C of high temperature furnace temperature, hydro-thermal 26 hours.
Wherein, drying temperature is 50 DEG C.
Embodiment 3:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Wherein, 8 times of quality for attapulgite of the quality of the chitosan.
Wherein, 1g attapulgites add in distilled water 35mL.
Wherein, 280 DEG C of high temperature furnace temperature, hydro-thermal 18 hours.
Wherein, drying temperature is 60 DEG C.
Embodiment 4:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Wherein, 5 times of quality for attapulgite of the quality of the chitosan.
Wherein, 1g attapulgites add in distilled water 25mL.
Wherein, 250 DEG C of high temperature furnace temperature, hydro-thermal 22 hours.
Wherein, drying temperature is 55 DEG C.
Embodiment 5:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Wherein, 7 times of quality for attapulgite of the quality of the chitosan.
Wherein, 1g attapulgites add in distilled water 25mL.
Wherein, 250 DEG C of high temperature furnace temperature, hydro-thermal 22 hours.
Wherein, drying temperature is 55 DEG C.
Embodiment 6:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Wherein, 6 times of quality for attapulgite of the quality of the chitosan.
Wherein, 1g attapulgites add in distilled water 20mL.
Wherein, 250 DEG C of high temperature furnace temperature, hydro-thermal 22 hours.
Wherein, drying temperature is 55 DEG C.
Embodiment 7:
A kind of attapulgite of surface modification, is prepared by the following method:It weighs attapulgite and chitosan is placed in beaker, Distilled water is added in, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle, then reaction kettle is put into high temperature furnace after ultrasonic disperse Middle reaction;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, is dried after centrifugation, after being ground up, sieved to obtain the final product The attapulgite of the surface modification.
Wherein, 6 times of quality for attapulgite of the quality of the chitosan.
Wherein, 1g attapulgites add in distilled water 30mL.
Wherein, 250 DEG C of high temperature furnace temperature, hydro-thermal 22 hours.
Wherein, drying temperature is 55 DEG C.
The attapulgite of surface modification provided by the invention can be as the adsorbent of Cr VI.
The effect of above-mentioned specific embodiment indicates that the essentiality content of the invention, but do not limit this hair with this The protection domain of bright creation.Simply modification or equivalent replacement are carried out to the technical solution of the invention, without departing from this hair It is bright to create the essence of technical solution, thus necessarily fall into the protection domain of the invention.

Claims (7)

1. a kind of attapulgite of surface modification, which is characterized in that be prepared by the following method:It weighs attapulgite and shell gathers Sugar is placed in beaker, is added in distilled water, is transferred the solution into polytetrafluoroethylene (PTFE) hydrothermal reaction kettle after ultrasonic disperse, then will reaction Kettle, which is put into high temperature furnace, to react;After natural cooling, with absolute ethyl alcohol and distilled water, respectively washing is multiple, dries, grinds after centrifugation Up to the attapulgite of the surface modification after honed sieve.
2. the attapulgite of surface modification according to claim 1, it is characterised in that:The quality of the chitosan is bumps 4-8 times of the quality of stick stone.
3. the attapulgite of surface modification according to claim 1, it is characterised in that:1g attapulgites add in distilled water 15-35mL。
4. the attapulgite of surface modification according to claim 1, it is characterised in that:220-280 DEG C of high temperature furnace temperature.
5. the attapulgite of surface modification according to claim 4, it is characterised in that:Hydro-thermal 18-26 hours.
6. the attapulgite of surface modification according to claim 1, it is characterised in that:Drying temperature is 50-60 DEG C.
7. purposes of the attapulgite of any surface modifications of claim 1-6 as Cr VI adsorbent.
CN201611224294.1A 2016-12-27 2016-12-27 A kind of attapulgite of surface modification and the purposes as adsorbent CN108236929A (en)

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CN201611224294.1A CN108236929A (en) 2016-12-27 2016-12-27 A kind of attapulgite of surface modification and the purposes as adsorbent

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103933951A (en) * 2014-05-13 2014-07-23 农业部环境保护科研监测所 Method for preparing chitosan-based adsorbent for adsorbing hexavalent chromium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103933951A (en) * 2014-05-13 2014-07-23 农业部环境保护科研监测所 Method for preparing chitosan-based adsorbent for adsorbing hexavalent chromium

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
QI ZHOU等: "One-step synthesis of amino-functionalized attapulgite clay nanoparticles adsorbent by hydrothermal carbonization of chitosan for removal of methylene blue from wastewater", 《COLLOIDS AND SURFACES A: PHYSICOCHEMICAL AND ENGINEERING ASPECTS》 *
李增新等: "凹凸棒石负载壳聚糖吸附废水中Cr(VI)的研究", 《安全与环境学报》 *

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Application publication date: 20180703