CN104815623A - Rice husk-based heavy metal adsorbent and preparation method thereof - Google Patents
Rice husk-based heavy metal adsorbent and preparation method thereof Download PDFInfo
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- CN104815623A CN104815623A CN201510167681.5A CN201510167681A CN104815623A CN 104815623 A CN104815623 A CN 104815623A CN 201510167681 A CN201510167681 A CN 201510167681A CN 104815623 A CN104815623 A CN 104815623A
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Abstract
The invention discloses a rice husk-based heavy metal adsorbent, which comprises the following raw materials by weight part: 40-60 parts of rice husk, 20-40 parts of fresh kelp, 3-5 parts of paddy rice straw, 5-10 parts of diatomite, 4-6 parts of gelatin, 1-2 parts of hydroxypropyl methyl cellulose, 1-2 parts of calcium chloride, 0.1-0.2 parts of dodecyl polyglucoside, and 0.05-0.1 part of sodium benzoate. The heavy metal adsorbent has the advantages of strong adsorption capability, large adsorption capacity and high removal efficiency, and has the characteristics of wide raw material source, low cost, energy conservation and waste utilization, environmental protection, no secondary pollution generation, and high utility value.
Description
Technical field
The present invention relates to environmental treatment field, be specifically related to a kind of rice husk basic weight metal absorbent and preparation method thereof.
Background technology
Normal containing heavy metal ion in the waste water that industrial production is discharged, severe contamination environment, simultaneously biological from wherein absorbing heavy metal by food chain enrichment, enter human body, cause slow poisoning, potential threat is caused to health.The method of process heavy metal in waste water mainly contains absorption method, electrolysis, ion-exchange and the precipitation method etc.These method removal heavy metal efficiency are high, but have the problems such as cost is large, energy consumption is high, complicated operation, instrument and equipment are expensive, limit its application.
Absorption method is as a kind of conventional heavy metal processing method, and key is to select suitable adsorbing medium.Wherein biological adsorption agent not only has the feature of general adsorbent, also has that cost is low, source is wide, high, selective good a, advantage such as condition of compatibility is wide of removal efficiency.Sea-tangle, as a kind of biological adsorption agent, has high using value, has a extensive future in heavy metal pollution process.
Summary of the invention
The object of this invention is to provide a kind of rice husk basic weight metal absorbent, heavy metal adsorption is strong, adsorption capacity is large, removal efficiency is high, does not produce secondary pollution.
The present invention is achieved by the following technical solutions:
A kind of rice husk basic weight metal absorbent, it is obtained by the raw material of following weight parts:
Rice husk 40-60, fresh sea-tangle 20-40, rice straw 3-5, diatomite 5-10, gelatin 4-6, hydroxypropyl methylcellulose 1-2, calcium chloride 1-2, Dodecyl Polyglucosides 0.1-0.2, Sodium Benzoate 0.05-0.1.
A preparation method for rice husk basic weight metal absorbent, comprises the following steps:
(1) add acetum 70-80 DEG C of appropriate 4-8% after rice husk, rice straw and diatomite being mixed, 400-800r/min stirs 5-10h, after cooling, pH is adjusted to neutrality, filters and drying, under 650-750 DEG C of condition, process 2-4h, be ground to 100-200 order after cooling, obtain mixed powder;
(2) rinse well with water after fresh sea-tangle soak at room temperature being spent the night, grind after dry 3-6h under 60-80 DEG C of condition, obtain Kelp Powder; Described Kelp Powder and gelatin are added in the mixed powder obtained in step (1) jointly, after stirring, adds water by solid-liquid weight ratio 1:1-1:1.5,60-80 DEG C, 400-600r/min stirs 4-8h, obtains mixed liquor;
(3) be mixed with soluble in water for calcium chloride the calcium chloride solution that concentration is 8-10%, stand-by; Mixed liquor in step (2) is first mixed with hydroxypropyl methylcellulose, Dodecyl Polyglucosides and Sodium Benzoate, 60-80 DEG C, 600-800r/min stirs 5-10h, then add described calcium chloride solution room temperature and leave standstill 2-4h, obtain mixed-matrix;
(4) grind evenly by after the mixed-matrix freeze drying obtained in step (3), cross 10-50 mesh sieve, get product after packing.
Rice husk is the discarded object of paddy processing factory, and not only waste resource as waste combustion process, flue dust is serious environment pollution also.Product heavy metal high adsorption capacity after rice husk high temperature carbonization, has the application potential quality of wastewater treatment; Containing active component and group in sea-tangle, the high adsorption capacity of heavy metal ion.Compatibility is carried out by the host material such as sea-tangle and rice husk, by the improvement of composition and engineering, form the sorbing material having loose structure and stronger heavy metal ion adsorbed ability concurrently, improve the absorption of heavy metal, accumulation ability and adsorption capacity, recycle agricultural residue rice husk, energy-saving and emission-reduction simultaneously.
Advantage of the present invention is:
The present invention rationally recycles rice husk, with sea-tangle, rice straw, the common compatibility of diatomite as adsorbing base, by the improvement of composition and engineering, obtain that there is loose structure, the adsorbing medium that specific area is large, make the heavy metal absorbent obtained have high adsorption capacity, adsorption capacity is large, removal efficiency is high advantage, raw material sources are extensive simultaneously, cheap, energy-conserving profit waste, environmental protection, does not produce secondary pollution, and practical value is high.
Detailed description of the invention
Non-limiting examples of the present invention is as follows:
A kind of rice husk basic weight metal absorbent, is prepared from by the component raw material of following weight (kg):
Rice husk 50, fresh sea-tangle 30, rice straw 4, diatomite 8, gelatin 5, hydroxypropyl methylcellulose 1.5, calcium chloride 1.5, Dodecyl Polyglucosides 0.15, Sodium Benzoate 0.08.
The preparation method of rice husk basic weight metal absorbent comprises the following steps:
(1) acetum 80 DEG C, the 400r/min that add appropriate 8% after rice husk, rice straw and diatomite being mixed stir 5h, after cooling, pH are adjusted to neutrality, filter and drying, process 2h, be ground to 100 orders, obtain mixed powder after cooling under 700 DEG C of conditions;
(2) rinse well with water after fresh sea-tangle soak at room temperature being spent the night, grind after dry 3h under 80 DEG C of conditions, obtain Kelp Powder; Described Kelp Powder and gelatin are added in the mixed powder obtained in step (1) jointly, after stirring, adds water by solid-liquid weight ratio 1:1,80 DEG C, 600r/min stirs 4h, obtains mixed liquor;
(3) be mixed with soluble in water for calcium chloride the calcium chloride solution that concentration is 10%, stand-by; Mixed liquor in step (2) is first mixed with hydroxypropyl methylcellulose, Dodecyl Polyglucosides and Sodium Benzoate, 80 DEG C, 800r/min stirs 5h, then add described calcium chloride solution room temperature and leave standstill 2h, obtain mixed-matrix;
(4) grind evenly by after the mixed-matrix freeze drying obtained in step (3), cross 10 mesh sieves, get product after packing.
Respectively above-mentioned for 0.5g obtained heavy metal absorbent being added 200mL concentration of heavy metal ion is in the solution of 100mg/L, under pH=7, temperature are the condition of 25 DEG C, its adsorption rate to different heavy metal ion is measured when adsorption time 10min, measurement result its be 97.6% to the adsorption rate of Cu2+, be 89.1% to the adsorption rate of Pb2+.
Claims (2)
1. a rice husk basic weight metal absorbent, is characterized in that, it is obtained by the raw material of following weight parts:
Rice husk 40-60, fresh sea-tangle 20-40, rice straw 3-5, diatomite 5-10, gelatin 4-6, hydroxypropyl methylcellulose 1-2, calcium chloride 1-2, Dodecyl Polyglucosides 0.1-0.2, Sodium Benzoate 0.05-0.1.
2. the preparation method of a kind of rice husk basic weight metal absorbent according to claim 1, is characterized in that, comprise the following steps:
(1) add acetum 70-80 DEG C of appropriate 4-8% after rice husk, rice straw and diatomite being mixed, 400-800r/min stirs 5-10h, after cooling, pH is adjusted to neutrality, filters and drying, under 650-750 DEG C of condition, process 2-4h, be ground to 100-200 order after cooling, obtain mixed powder;
(2) rinse well with water after fresh sea-tangle soak at room temperature being spent the night, grind after dry 3-6h under 60-80 DEG C of condition, obtain Kelp Powder; Described Kelp Powder and gelatin are added in the mixed powder obtained in step (1) jointly, after stirring, adds water by solid-liquid weight ratio 1:1-1:1.5,60-80 DEG C, 400-600r/min stirs 4-8h, obtains mixed liquor;
(3) be mixed with soluble in water for calcium chloride the calcium chloride solution that concentration is 8-10%, stand-by; Mixed liquor in step (2) is first mixed with hydroxypropyl methylcellulose, Dodecyl Polyglucosides and Sodium Benzoate, 60-80 DEG C, 600-800r/min stirs 5-10h, then add described calcium chloride solution room temperature and leave standstill 2-4h, obtain mixed-matrix;
(4) grind evenly by after the mixed-matrix freeze drying obtained in step (3), cross 10-50 mesh sieve, get product after packing.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565460A (en) * | 2015-12-21 | 2016-05-11 | 天津欧盼科技开发有限公司 | Method for treating heavy-metal-polluted water |
| CN106335989A (en) * | 2015-12-30 | 2017-01-18 | 湖北文理学院 | Preparation method of domestic sewage cleaning agent |
| CN106390941A (en) * | 2016-11-04 | 2017-02-15 | 金福兴 | Environment-friendly heavy metal ion adsorbing material and preparation method thereof |
| CN106563417A (en) * | 2016-12-22 | 2017-04-19 | 浙江海洋大学 | Heavy-metal biological absorbent and preparation method thereof |
| CN107866201A (en) * | 2017-12-26 | 2018-04-03 | 徐州得铸生物科技有限公司 | A kind of preparation method of the high-efficiency activated adsorbent of desiliconization rice husk |
| CN115646435A (en) * | 2022-11-18 | 2023-01-31 | 中国水产科学研究院黄海水产研究所 | Marine heavy metal adsorbent, preparation and use method thereof |
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| CN103657604A (en) * | 2013-12-20 | 2014-03-26 | 大连赛姆生物工程技术有限公司 | Medical stone water purifier quickly purifying marine culture water body |
| CN103691404A (en) * | 2013-12-20 | 2014-04-02 | 大连赛姆生物工程技术有限公司 | Attapulgite water purifying agent for quickly purifying marine culture water body |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565460A (en) * | 2015-12-21 | 2016-05-11 | 天津欧盼科技开发有限公司 | Method for treating heavy-metal-polluted water |
| CN106335989A (en) * | 2015-12-30 | 2017-01-18 | 湖北文理学院 | Preparation method of domestic sewage cleaning agent |
| CN106335989B (en) * | 2015-12-30 | 2019-05-03 | 湖北文理学院 | A kind of preparation method of sanitary sewage detergent |
| CN106390941A (en) * | 2016-11-04 | 2017-02-15 | 金福兴 | Environment-friendly heavy metal ion adsorbing material and preparation method thereof |
| CN106563417A (en) * | 2016-12-22 | 2017-04-19 | 浙江海洋大学 | Heavy-metal biological absorbent and preparation method thereof |
| CN106563417B (en) * | 2016-12-22 | 2018-12-28 | 浙江海洋大学 | A kind of Biosorbent for heavy metals and preparation method thereof |
| CN107866201A (en) * | 2017-12-26 | 2018-04-03 | 徐州得铸生物科技有限公司 | A kind of preparation method of the high-efficiency activated adsorbent of desiliconization rice husk |
| CN115646435A (en) * | 2022-11-18 | 2023-01-31 | 中国水产科学研究院黄海水产研究所 | Marine heavy metal adsorbent, preparation and use method thereof |
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