CN104226270A - Modified preparation method for corn straw capable of adsorbing arsenic in water - Google Patents
Modified preparation method for corn straw capable of adsorbing arsenic in water Download PDFInfo
- Publication number
- CN104226270A CN104226270A CN201410491785.7A CN201410491785A CN104226270A CN 104226270 A CN104226270 A CN 104226270A CN 201410491785 A CN201410491785 A CN 201410491785A CN 104226270 A CN104226270 A CN 104226270A
- Authority
- CN
- China
- Prior art keywords
- arsenic
- water
- maize straw
- straw
- deionized water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention belongs to the field of environmental protection and particularly relates to a modified preparation method for a corn straw capable of adsorbing arsenic in water. Middle nodules of the air-dried corn straw are removed, the corn straw is cut into short sticks, the short sticks are washed and dried to reach constant weight, the hard barks on the surfaces are removed, the short sticks are cut into straw particles, the straw particles are soaked in isopropyl alcohol for 8-10 hours, washed with deionized water and dried, then the processed straw particles are soaked in a NaOH solution with the concentration of 0.8-1.2mol/L for 6-8 hours, washed with deionized water and dried, then the processed straw particles are soaked in oxalic acid with the concentration of 0.18-0.22mol/L, washed with deionized water, and dried, so as to finally obtain a modified corn straw adsorbent, wherein the maximum saturated adsorption is up to 94[mu]gAs(III)/g (straw). The materials are easy to get, the cost is low, the toxicity is low, the modified method is simple in operation steps, the conditions are easy to achieve, high temperature or high pressure is not needed, the method is easy to realize, and the arsenic adsorption effect of the modified corn straw is good.
Description
Technical field
The invention belongs to field of environment protection, be specifically related to a kind of modification method for preparing of the maize straw for arsenic in adsorbed water.
Background technology
All there is the phenomenon of underground water and surface water arsenic content overproof in many places in the world, wherein the Taiwan of Bangladesh, India, Thailand and China is that Asia arsenic exceeds standard countries and regions the most serious.In China, the serious area of arsenic poisoning is mainly distributed in Shanxi, the Inner Mongol, Xinjiang, Ningxia etc. and economizes (district).According to Ministry of Water Resources, the National Development and Reform Commission, the Ministry of Public Health in November, 2004-2005 year June to the investigation result of 2674 units at county level of China, it is 2,890,000 people that the exceed standard population of water of arsenic is drunk in rural area, the whole nation, is distributed in 23 provinces, autonomous regions and municipalities (" national countryside potable water security on-site investigation assessment report "); Wherein serious with ground state of an illness such as Shanxi, the Inner Mongol and Guizhou.In recent years, environmental pollution is more and more serious, and arsenic poisoning event also frequently occurs, and has found in 1991 the cutaneum carcinoma patient that an example causes owing to drinking high-arsenic underground water.Along with the raising of people's lives condition, the requirement of people to health status is more and more higher, and high arsenic type drinking water and the endemic arsenic poisoning that causes thereof, has caused the great attention of international community.Many countries and regions are dropped into a lot of fund for this reason and are used for strengthening the research to high arsenic water, to solve drinking water type arsenic poisoning problem; Drinking water standard requires to bring up to 0.01mg/L by 0.05mg/L to the limit value of arsenic by China, the U.S. and European Union etc.In order to improve the water quality of drinking water, prevent the generation of drinking water type arsenic poisoning, the Cheap highly effective treatment technology developing high arsenic water seems extremely important.
In water, the removal of arsenic mainly contains: absorption method, precipitation and coagulant sedimentation, bioanalysis, electrocoagulation, ion-exchange and membrane separation technique etc.Absorption method is simple to operate, cheap with it, efficient and enjoy favor.It is by the arsenic in water and the physics between adsorbent or chemical action that absorption method removes arsenic in water, is adsorbed in the surface of adsorbent, realizes the removal of arsenic in water, be one of main method removing Arsenic in Drinking Water, have a extensive future.But absorption method arsenic removal at present is still limited to selecting and modification aspect of sorbent material; Living beings (such as maize straw) adsorbent and discarded object adsorbent are because having eco-friendly feature, it is one of Main way studying arsenic adsorbent from now on, should form efficient, economic arsenic removal process as early as possible, exploitation new equipment, meets the needs of engineer applied; The accumulation ability of living beings, further investigation is more needed, for commercial Application establishes the oretical Foundation Stone to distribution of As forms in the adsorption mechanism of arsenic and water.
China is a large agricultural country, and agricultural straw resource enriches, and maize straw annual output wherein reaches more than one hundred million ton, but these stalks can not get rational utilization at present, major part is arbitrarily discarded in farmland or on-site incineration, not only causes the wasting of resources, also causes environmental pollution.Along with modernization that is agriculture and process technology, had brand-new transformation to the understanding of agricultural crop straw, stalk is the same with seed is all important agricultural product.Compared with developed countries, also lower to the level of comprehensive utilization of stalk, a large amount of valuable stalk resource is discarded, runs off and is sunk into sleep.The waste of stalk resource is in fact the waste of water resource, arable land and countryside tax system.So the agricultural resource making full use of these things that go out of use more and more causes the concern of scientist.Cellulose, hemicellulose and lignin are the main components of straw plants cell membrane, and wherein, content of cellulose is maximum, account for 30% ~ 50% of Replicative senescence.Cellulose in stalk has complicated supramolecular structure, leads to peroxide bond associate into fibrillation in glucose molecule chain with interchain.The place that fibrillation interior molecules density is large is crystal region, and relative loose is amorphous region.Carry out scanning discovery by electron microscope to maize straw, the lignin in maize straw and hemicellulose cover fibre bundle, and fibre bundle surface is covered with chip.Fiber bundle structure has certain hole to exist, so, can by adding some solvent, cause the chemical bond rupture of partial lignin and hemicellulose etc. and dissolve, impel it to form countless micropore and hole, significantly increase specific area, increase the avtive spot on its surface, improve surface-active, strengthen the absorption property ability of maize straw adsorbent.
Summary of the invention
For prior art Problems existing, the invention provides a kind of modification method for preparing of the maize straw for arsenic in adsorbed water, it is raw material with maize straw that object is to provide a kind of, by modification, prepares the processing method of arsenic in the preparation method and adsorbed water that can be used for the adsorbent of arsenic in adsorbed water.
For achieving the above object, technical scheme of the present invention is carried out according to following steps:
(1) by air-dry maize straw removing middle node, be cut into quarter butt, wash and dry to constant weight, then remove its surperficial sclerderm, and cut into the stalk particle of diameter 0.8 ~ 1.2cm;
(2) above-mentioned stalk particle being immersed in volumetric concentration is 8 ~ 10h in the isopropyl alcohol of 0.8 ~ 1.2%, cleans post-drying after taking-up by deionized water;
(3) stalk particle after oven dry in step (2) being immersed in concentration is in the NaOH solution of 0.8 ~ 1.2mol/L, soaks 6 ~ 8 hours, cleans, make pH value be that neutrality is dried again after taking-up by deionized water;
(4) stalk particle of drying in step (3) being immersed in concentration is in the oxalic acid of 0.18 ~ 0.22mol/L, soak 6 ~ 8 hours, clean by deionized water after taking-up, dry, finally obtain the maize straw adsorbent that modification is good, its maximum saturation adsorbance reaches 94 μ g As(III)/g(stalk).
Described cleaning by deionized water is cyclic washing 3 ~ 5 times.
Described bake out temperature is 73 ~ 77 DEG C.
When adopting the maize straw of above-mentioned modification to adsorb the arsenic in water, carry out according to following steps:
The pH of pending arsenic-containing water is adjusted to 8.5 ~ 9.5, and control temperature is 23 ~ 27 DEG C, adds modified maize straw, carries out shaking at least 90min.
Compared with prior art, feature of the present invention and beneficial effect are:
During the corn straw modification of the present invention's arsenic in for the preparation of adsorbed water, first the maize straw running water through natural drying to be rinsed well repeatedly, must not with silt, dust etc., and the outer sclerderm of stalk will be removed, modifying agent amount used is determined according to maize straw used, but will ensure that all maize straws are all submerged.
Method of modifying of the present invention is the solvability that make use of isopropyl alcohol, to remove pigment, some polar substances in stalk, and the chemical bond rupture of partial lignin and hemicellulose etc. and dissolving; The effect of NaOH mainly removes pigment, hemicellulose further; The object adding oxalic acid mainly introduces carboxyl, carries out deprotonation to stalk, and activation adsorption site, improves absorption property.
Advantage of the present invention has:
(1) raw material is easy to get, cheap, and nontoxic; Modified adsorbent major ingredient is maize straw, and main agents has isopropyl alcohol, NaOH solution, oxalic acid solution, is common nontoxic chemical reagent;
(2) carry out the method operating procedure of modification simply to maize straw, condition is easy to reach, and without the need to HTHP, easily realizes;
(3) the present invention has opened up the application of maize straw, achieves the resource application of discarded object;
(4) efficiently solve poverty-stricken area height arsenic type drinking water problem, the sorbent treatment after using is convenient.
Detailed description of the invention
Embodiment 1
(1) by air-dry maize straw removing middle node, be cut into quarter butt, wash and dry to constant weight, then remove its surperficial sclerderm, and cut into the stalk particle of diameter 0.8 ~ 1.2cm;
(2) above-mentioned stalk particle being immersed in volumetric concentration is 9h in the isopropyl alcohol of 0.8%, cleans post-drying after taking-up by deionized water;
(3) stalk particle after oven dry in step (2) being immersed in concentration is in the NaOH solution of 0.8mol/L, soaks 8 hours, uses deionized water cyclic washing 3 ~ 5 times, make pH value be that neutrality is again in 77 DEG C of oven dry after taking out;
(4) stalk particle of drying in step (3) being immersed in concentration is in the oxalic acid of 0.22mol/L, soaks 6 hours, cleans, dry, finally obtain the maize straw adsorbent that modification is good after taking-up by deionized water.
The maize straw of above-mentioned modification is adopted to adsorb the arsenic in water, the pH of pending arsenic-containing water is adjusted to 9.5, control temperature is 27 DEG C, add modified maize straw, carry out shaking at least 90min, record its saturated extent of adsorption and reach 94 μ g As(III)/g(stalk), the clearance of arsenic reaches 95%.
The maize straw of non-modified process is put into arsenic-containing water, records its saturated extent of adsorption and be only 76 μ g As(III)/g(stalk), illustrate that the stalk modification of the present embodiment improves the adsorption capacity of stalk.
Embodiment 2
(1) by air-dry maize straw removing middle node, be cut into quarter butt, wash and dry to constant weight, then remove its surperficial sclerderm, and cut into the stalk particle of diameter 1.8 ~ 1.2cm;
(2) above-mentioned stalk particle being immersed in volumetric concentration is 10h in the isopropyl alcohol of 1.2%, cleans post-drying after taking-up by deionized water;
(3) stalk particle after oven dry in step (2) being immersed in concentration is in the NaOH solution of 1.0mol/L, soaks 7 hours, uses deionized water cyclic washing 3 ~ 5 times, make pH value be that neutrality is again in 73 DEG C of oven dry after taking out;
(4) stalk particle of drying in step (3) being immersed in concentration is in the oxalic acid of 0.18mol/L, soaks 7 hours, cleans, dry, finally obtain the maize straw adsorbent that modification is good after taking-up by deionized water.
The maize straw of above-mentioned modification is adopted to adsorb the arsenic in water, the pH of pending arsenic-containing water is adjusted to 9.0, control temperature is 25 DEG C, add modified maize straw, carry out shaking at least 90min, record its saturated extent of adsorption and reach 94 μ g As(III)/g(stalk), the clearance of arsenic reaches 95%.
The maize straw of non-modified process is put into arsenic-containing water, records its saturated extent of adsorption and be only 75 μ g As(III)/g(stalk), illustrate that the stalk modification of the present embodiment improves the adsorption capacity of stalk.
Embodiment 3
(1) by air-dry maize straw removing middle node, be cut into quarter butt, wash and dry to constant weight, then remove its surperficial sclerderm, and cut into the stalk particle of diameter 1.8 ~ 1.2cm;
(2) above-mentioned stalk particle being immersed in volumetric concentration is 8h in the isopropyl alcohol of 1.0%, cleans post-drying after taking-up by deionized water;
(3) stalk particle after oven dry in step (2) being immersed in concentration is in the NaOH solution of 1.2mol/L, soaks 6 hours, uses deionized water cyclic washing 3 ~ 5 times, make pH value be that neutrality is again in 75 DEG C of oven dry after taking out;
(4) stalk particle of drying in step (3) being immersed in concentration is in the oxalic acid of 0.2mol/L, soaks 8 hours, cleans, dry, finally obtain the maize straw adsorbent that modification is good after taking-up by deionized water.
The maize straw of above-mentioned modification is adopted to adsorb the arsenic in water, the pH of pending arsenic-containing water is adjusted to 8.5, control temperature is 23 DEG C, add modified maize straw, carry out shaking at least 90min, record its saturated extent of adsorption and reach 92.5 μ g As(III)/g(stalk), the clearance of arsenic reaches 94%.
The maize straw of non-modified process is put into arsenic-containing water, records its saturated extent of adsorption and be only 74 μ g As(III)/g(stalk), illustrate that the stalk modification of the present embodiment improves the adsorption capacity of stalk.
Claims (4)
1., for a modification method for preparing for the maize straw of arsenic in adsorbed water, it is characterized in that carrying out according to following steps:
(1) by air-dry maize straw removing middle node, be cut into quarter butt, wash and dry to constant weight, then remove its surperficial sclerderm, and cut into the stalk particle of diameter 0.8 ~ 1.2cm;
(2) above-mentioned stalk particle being immersed in volumetric concentration is 8 ~ 10h in the isopropyl alcohol of 0.8 ~ 1.2%, cleans post-drying after taking-up by deionized water;
(3) stalk particle after oven dry in step (2) being immersed in concentration is in the NaOH solution of 0.8 ~ 1.2mol/L, soaks 6 ~ 8 hours, cleans, make pH value be that neutrality is dried again after taking-up by deionized water;
(4) stalk particle of drying in step (3) being immersed in concentration is in the oxalic acid of 0.18 ~ 0.22mol/L, soak 6 ~ 8 hours, clean by deionized water after taking-up, dry, finally obtain the maize straw adsorbent that modification is good, its maximum saturation adsorbance reaches 94 μ g As(III)/g stalk.
2. the modification method for preparing of a kind of maize straw for arsenic in adsorbed water according to claim 1, is characterized in that described cleaning by deionized water is cyclic washing 3 ~ 5 times.
3. the modification method for preparing of a kind of maize straw for arsenic in adsorbed water according to claim 1, is characterized in that described bake out temperature is 73 ~ 77 DEG C.
4., when adopting the corn straw modification as prepared for the modification method for preparing of the maize straw of arsenic in adsorbed water in claim 1 to adsorb the arsenic in water, it is characterized in that carrying out according to following steps:
The pH of pending arsenic-containing water is adjusted to 8.5 ~ 9.5, and control temperature is 23 ~ 27 DEG C, adds modified maize straw, carries out shaking at least 90min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491785.7A CN104226270A (en) | 2014-09-24 | 2014-09-24 | Modified preparation method for corn straw capable of adsorbing arsenic in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491785.7A CN104226270A (en) | 2014-09-24 | 2014-09-24 | Modified preparation method for corn straw capable of adsorbing arsenic in water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104226270A true CN104226270A (en) | 2014-12-24 |
Family
ID=52215694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410491785.7A Pending CN104226270A (en) | 2014-09-24 | 2014-09-24 | Modified preparation method for corn straw capable of adsorbing arsenic in water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104226270A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221056A (en) * | 2016-07-26 | 2016-12-14 | 南通市金友新材料科技有限公司 | The manufacture method of ecological high temperature transfer decorative panel |
| CN106277161A (en) * | 2016-08-11 | 2017-01-04 | 广东工业大学 | A kind of method of rape stalk Phenol-Containing Wastewater Treatment |
| CN106799205A (en) * | 2016-12-22 | 2017-06-06 | 新疆水处理工程技术研究中心有限公司 | A kind of preparation method of drinking water fluorine removal arsenic adsorbent |
| CN109289783A (en) * | 2018-10-22 | 2019-02-01 | 北京科技大学 | Utilize garlic stalk waste preparation arsenic removal compounding adsorbent material and application method |
| CN110302761A (en) * | 2019-06-11 | 2019-10-08 | 黄圣 | A method of heavy metal is adsorbed using corn stover |
| CN111647408A (en) * | 2020-06-19 | 2020-09-11 | 河北圆成环保科技股份有限公司 | Multifunctional microbial agent for environmental protection and preparation method thereof |
| CN116139828A (en) * | 2022-09-09 | 2023-05-23 | 中国地质大学（武汉） | Biological adsorbent and preparation method and application thereof |
| CN116139828B (en) * | 2022-09-09 | 2024-05-10 | 中国地质大学（武汉） | Biological adsorbent and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862642A (en) * | 2010-06-24 | 2010-10-20 | 山东大学 | Preparation method and application of amphoteric chelate sorbent containing agricultural straw |
| CN102266756A (en) * | 2011-07-25 | 2011-12-07 | 武汉工程大学 | Preparation method of citric acid modified rape straw adsorbent and application thereof |
-
2014
- 2014-09-24 CN CN201410491785.7A patent/CN104226270A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862642A (en) * | 2010-06-24 | 2010-10-20 | 山东大学 | Preparation method and application of amphoteric chelate sorbent containing agricultural straw |
| CN102266756A (en) * | 2011-07-25 | 2011-12-07 | 武汉工程大学 | Preparation method of citric acid modified rape straw adsorbent and application thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221056A (en) * | 2016-07-26 | 2016-12-14 | 南通市金友新材料科技有限公司 | The manufacture method of ecological high temperature transfer decorative panel |
| CN106277161A (en) * | 2016-08-11 | 2017-01-04 | 广东工业大学 | A kind of method of rape stalk Phenol-Containing Wastewater Treatment |
| CN106799205A (en) * | 2016-12-22 | 2017-06-06 | 新疆水处理工程技术研究中心有限公司 | A kind of preparation method of drinking water fluorine removal arsenic adsorbent |
| CN109289783A (en) * | 2018-10-22 | 2019-02-01 | 北京科技大学 | Utilize garlic stalk waste preparation arsenic removal compounding adsorbent material and application method |
| CN110302761A (en) * | 2019-06-11 | 2019-10-08 | 黄圣 | A method of heavy metal is adsorbed using corn stover |
| CN111647408A (en) * | 2020-06-19 | 2020-09-11 | 河北圆成环保科技股份有限公司 | Multifunctional microbial agent for environmental protection and preparation method thereof |
| CN116139828A (en) * | 2022-09-09 | 2023-05-23 | 中国地质大学（武汉） | Biological adsorbent and preparation method and application thereof |
| CN116139828B (en) * | 2022-09-09 | 2024-05-10 | 中国地质大学（武汉） | Biological adsorbent and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104226270A (en) | Modified preparation method for corn straw capable of adsorbing arsenic in water | |
| Ngo et al. | Typical low cost biosorbents for adsorptive removal of specific organic pollutants from water | |
| Ronda et al. | Analysis of the kinetics of lead biosorption using native and chemically treated olive tree pruning | |
| Martín-Lara et al. | Development and characterization of biosorbents to remove heavy metals from aqueous solutions by chemical treatment of olive stone | |
| CN105289524A (en) | Shaddock peel heavy metal adsorbent and preparation method and application thereof | |
| Bardhan et al. | Adsorption of methylene blue onto betel nut husk-based activated carbon prepared by sodium hydroxide activation process | |
| CN103447009B (en) | A kind of preparations and applicatio of cysteine-modifying loofah adsorbent | |
| CN101721978A (en) | Adsorbent for polyaromatic hydrocarbon pollutant, preparation method and application thereof | |
| CN103920460A (en) | Method for preparing high-performance biomass activated carbon fibers | |
| CN107243331B (en) | Environment-friendly type water purification bag for water process and preparation method thereof | |
| CN103480330B (en) | Biomass-modified adsorbent for adsorbing coking wastewater, and preparation method and application thereof | |
| CN103566907A (en) | Preparation method and application of pyromellitic dianhydride modified loofah sponge adsorbent | |
| Saravanan et al. | Modelling on the removal of dye from industrial wastewater using surface improved Enteromorpha intestinalis | |
| CN105413648A (en) | Folium ginkgo adsorbing material and preparation method thereof | |
| Chakhtouna et al. | Recent advances in eco-friendly composites derived from lignocellulosic biomass for wastewater treatment | |
| CN105561943B (en) | A kind of preparation method and application of magnetic rape stalk sorbing material | |
| CN104383900A (en) | Preparation method of polypyrrole-modified corncob composite adsorbent | |
| Wang et al. | Removal of methylene blue from aqueous solution by adsorption onto crofton weed stalk | |
| CN105536714A (en) | Heavy metal cellulose adsorbent and preparation method thereof | |
| CN105435748A (en) | Plant cellulose adsorbent | |
| CN103566905B (en) | Modified wood chips adsorbent, preparation method and in process containing the application in basic-dyeable fibre waste water | |
| CN105195100A (en) | Preparation method of beta-cyclodextrin modified loofah sponge adsorbent | |
| CN103933944A (en) | Preparation and application of gamma-(aminopropyl)triethoxysilane modified loofah sponge adsorbent | |
| CN103933950B (en) | A kind of preparation method of luffa solid-loaded ionic-liquid adsorbent | |
| Zhou et al. | Biosorption of Methylene Blue onto spent corncob substrate: kinetics, equilibrium and thermodynamic studies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141224 |
|
| RJ01 | Rejection of invention patent application after publication |