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Heavy metal adsorbent and preparation method and application thereof

A heavy metal and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as biological hazards, and achieve the effect of easy to obtain raw materials, easy to control, and good adsorption performance

Active Publication Date: 2018-10-09
YUNNAN SHENGQING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, long-term direct or indirect exposure to soluble arsenic can cause harm to organisms

Method used

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  • Heavy metal adsorbent and preparation method and application thereof

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[0031] The preparation method of heavy metal adsorbent of the present invention comprises the following steps:

[0032] A. Pulverize the attapulgite clay of the formula ratio through a 200-mesh sieve, then carry out acid activation treatment, wash to neutrality and dry and grind to obtain material a for subsequent use;

[0033] B. Make a mixed solution with NaOH, urea, and water according to the mass ratio of (5~7):(3~5):(80~100) to obtain material b, and add cellulose in the formula ratio to material b , placed at 0-5°C for 10-18 hours, then thawed and stirred to obtain cellulose solution c;

[0034] C. Add material a to cellulose solution c, stir at a temperature of 10~30°C for 3~5h to obtain a mixed solution d, and then add CaCO with a weight percentage of 1~10% in the mixed solution d 3 , sonicated for 30-60 minutes to obtain material e;

[0035] D. Add the HCl solution or ethanol solution with a pH value of 1 to 5 dropwise into the material e, and stir while adding to o...

Embodiment 1

[0045] Set up the test device and prepare the adsorbent according to the following steps:

[0046] 1) Take 4g of 200-mesh attapulgite clay for acid activation treatment, wash until neutral, dry and grind for later use;

[0047]2) Make a mixed solution with the mass ratio of NaOH, urea, and water as 6:4:90, then add 4% cellulose by mass, freeze in the refrigerator overnight, and stir while thawing to obtain a cellulose solution; Add 1.3g spare attapulgite clay to the plain solution, stir at room temperature for 5 hours; add 5% CaCO to the mixed solution 3 Ultrasound for 30min;

[0048] 3) Prepare HCl solutions or ethanol solutions with pHs of 1, 3, and 5 respectively, and add the mixture dropwise with a constant pressure funnel while stirring to obtain a spherical attapulgite cellulose composite adsorbent, soak the composite adsorbent in water and acetone Wash until neutral, freeze-dry for later use;

[0049] 4) Load iron and manganese oxides with the prepared spherical adso...

Embodiment 2

[0052] Set up the test device and prepare the adsorbent according to the following steps:

[0053] 1) Take 4g of 200-mesh attapulgite clay for acid activation treatment, wash until neutral, dry and grind for later use;

[0054] 2) Make a mixed solution with the mass ratio of NaOH, urea, and water as 6:4:90, then add 4% cellulose by mass, freeze in the refrigerator overnight, and stir while thawing to obtain a cellulose solution; Add 2g of spare attapulgite clay to the plain solution, and stir at room temperature for 5 hours; add 10% CaCO to the mixed solution 3 Ultrasound for 30min;

[0055] 3) Prepare HCl solutions or ethanol solutions with pHs of 1, 3, and 5 respectively, and add the mixture dropwise with a constant pressure funnel while stirring to obtain a spherical attapulgite cellulose composite adsorbent, soak the composite adsorbent in water and acetone Wash until neutral, freeze-dry for later use;

[0056] 4) Load iron and manganese oxides with the prepared spheric...

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Abstract

The invention discloses a heavy metal adsorbent and a preparation method and application thereof. The heavy metal adsorbent is prepared by modifying raw materials including attapulgite clay and microcrystalline cellulose, wherein the mass ratio of attapulgite clay to microcrystalline cellulose is (1-4) : 1, and attapulgite refers to aqueous magnesium-rich aluminosilicate mineral having the laminated chain structure. The heavy metal adsorbent is applied to preparation of adsorbent products for overcoming heavy metal pollution. Since attapulgite and microcrystalline cellulose are taken as the raw materials, cellulose is dissolved by an alkali / urea system, and attapulgite and calcium carbonate are added to prepare a porous attapulgite and cellulose composite adsorbent; the the modifying process needs mild condition without pollution, is easy to control and has high yield. Besides, the attapulgite and cellulose composite adsorbent is low in cost, environmental friendly, high in adsorptioncapacity, wide in service condition, and can be applied industrialized production.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a heavy metal adsorbent and its preparation method and application. Background technique [0002] Heavy metal wastewater pollution is one of the most serious environmental pollution. Because of its toxicity and refractory biodegradability, water bodies polluted by heavy metal wastewater often have serious consequences for humans, aquatic animals and plants. Heavy metals such as: Cd, Pb, Cr, As, Hg, Ni, Cu, etc. Among them, arsenic and cadmium are among the most common environmental chemical pollutants and one of the most serious hazards to residents' health. [0003] Arsenic compounds are soluble and can be directly absorbed and utilized by animals, plants and humans. Therefore, long-term direct or indirect exposure to soluble arsenic can cause harm to organisms. Arsenic is a carcinogenic and mutagenic factor, and has teratogenic effects on animals. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/06B01J20/12B01J20/24C02F1/288C02F2101/20
Inventor 黄志红肖惠宁李箫宁潘远凤张振强李博张金瑶
Owner YUNNAN SHENGQING ENVIRONMENTAL PROTECTION TECH CO LTD
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