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Biomass-based adsorption material for removing heavy metal ions in water as well as preparation method and application thereof

A technology of heavy metal ions and adsorption materials, applied in the directions of alkali metal compounds, alkali metal oxides/hydroxides, water pollutants, etc. Simple and high-efficiency reduction of heavy metal ion content and easy operation

Inactive Publication Date: 2017-09-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These common adsorbents have a problem in water treatment, that is, the adsorbent is not easy to remove, and the process of removing the adsorbent is not only a waste of time, but also increases additional costs

Method used

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  • Biomass-based adsorption material for removing heavy metal ions in water as well as preparation method and application thereof
  • Biomass-based adsorption material for removing heavy metal ions in water as well as preparation method and application thereof
  • Biomass-based adsorption material for removing heavy metal ions in water as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The specific surface area is 1.91m 2 The wheat straw / g is the biomass material powder obtained after the raw material is mechanically pulverized (the scanning electron microscope photo is shown in Fig. figure 1 shown), the preparation of biomass material / Fe 3 o 4 -Mg(OH) 2 (sample 1), and carry out the test of adsorption performance to sample 1.

[0048] In a 100mL flask, add 50mL distilled water, 3.2gMg(NO 3 ) 2 ·6H 2 O, 1.2g FeSO 4 ·7H 2 O, 2.2 g FeCl 3 ·6H 2 O, 0.8g of biomass material powder obtained by mechanical pulverization, fully stirred and dispersed, fed nitrogen for 5 minutes, began to slowly drip ammonia water, dripped ammonia water (25%) 10mL, and continued to feed nitrogen for 3 minutes. After the system was closed, it was placed in an oil bath at 70°C for 4 hours of reaction. After the reaction, the reaction product was repeatedly suction-filtered and washed until the pH value of the solution was neutral, and then the product was dried in an ov...

Embodiment 2

[0052] The specific surface area is 1.91m 2 / g wheat straw is the biomass material powder obtained by mechanical crushing of the raw material, and the biomass material / Fe 3 o 4 -Mg(OH) 2 (sample 2), and carry out the test of adsorption performance to sample 2.

[0053] In a 100mL flask, add 50mL distilled water, 3.2gMg(NO 3 ) 2 ·6H 2 O, 1.2g FeSO 4 ·7H 2 O, 2.2 g FeCl 3 ·6H 2 O, 1.0 g of biomass material powder obtained by mechanical pulverization, fully stirred and dispersed, fed nitrogen for 5 minutes, began to slowly drip ammonia water, dripped ammonia water (25%) 10mL, and continued to feed nitrogen for 3 minutes. After the system was closed, it was placed in an oil bath at 70°C for 6 hours. After the reaction, the reaction product was repeatedly suction-filtered and washed until the pH value of the solution was neutral, and then the product was dried in an oven at 70°C for 4 hours to obtain Biomass-based adsorption material sample 2 for removing heavy metal ions...

Embodiment 3

[0056] The specific surface area is 2.87m 2 / g wheat straw is the biomass material powder obtained by mechanical crushing of the raw material, and the biomass material / Fe 3 o 4 -Mg(OH) 2 (sample 3), and carry out the test of adsorption performance to sample 3.

[0057] In a 100mL flask, add 50mL distilled water, 3.2gMg(NO 3 ) 2 ·6H 2 O, 1.2g FeSO 4 ·7H 2 O, 2.2 g FeCl 3 ·6H 2 O, 1.5 g of biomass material powder obtained by mechanical pulverization, fully stirred and dispersed, fed nitrogen for 5 minutes, began to slowly drip ammonia water, dripped ammonia water (25%) 10 mL, and continued to feed nitrogen for 3 minutes. After the system was closed, it was placed in an oil bath at 50°C for 10 hours. After the reaction, the reaction product was repeatedly suction-filtered and washed until the pH value of the solution was neutral, and then the product was dried in an oven at 70°C for 4 hours to obtain Biomass-based adsorption material sample 3 for removing heavy metal io...

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Abstract

The invention discloses a biomass-based adsorption material for removing heavy metal ions in water as well as a preparation method and application thereof. The biomass-based adsorption material comprises a base material and inorganic particles, wherein the specific surface area of the biomass-based material is 1m<2> / g-100m<2> / g; the inorganic particles comprise iron-containing inorganic magnetic particles and magnesium-containing inorganic particles; the loading amount of the inorganic particles is 10-70wt% of the total amount of the adsorbent material. The iron-containing inorganic magnetic particles and the magnesium-containing inorganic particles are loaded on the biomass surface through an in-situ co-precipitation method. The compound adsorbent material is capable of removing the heavy metal ions such as Cu<2+>, Cr2O7<2->, Pb<2+> and the like in the water and can be easily removed from the water. Compared with the heavy metal ion adsorbent material in the prior art, a natural and cheap biomass material can be used as an adsorption carrier; the biomass material is green, environmentally friendly and efficient, is capable of enabling the content of the heavy metals in the water to be far lower than the national standard, is easily removed under the action of external magnetic field, and is convenient and extensive in application.

Description

technical field [0001] The invention relates to the field of preparation of water treatment adsorption materials by surface functionalization of biomass materials. More specifically, it relates to a material for efficiently adsorbing heavy metal ions in water based on a biomass material-loaded inorganic particle composite and a preparation method thereof. Background technique [0002] "Heavy metal" is the atomic density greater than 6g cm -3 The general term for a class of metals and non-metals. In terms of environmental pollution, heavy metals mainly refer to heavy elements with significant biological toxicity such as mercury, cadmium, lead, copper, chromium, and metalloid arsenic. Copper is an essential trace element for the human body, and the daily requirement for adults is about 20 mg. Excessive intake of copper can lead to vomiting, coma, cardiovascular disease and Wilson's disease (neurological or liver disease caused by abnormal copper metabolism). According to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J20/28009B01J20/28016B01J2220/485C02F1/286C02F2101/20
Inventor 吴敏黄勇黄大勇李博轩
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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