Sodium alginate and calcium ion modified charcoal composite material as well as preparation method and application thereof

A technology of sodium alginate and composite materials, which is applied in chemical instruments and methods, water pollutants, other chemical processes, etc., to achieve the effects of short production cycle, simple preparation process and operation, and low price

Inactive Publication Date: 2018-05-04
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to develop a low-cost, high-efficiency biochar composite material modified by calcium ions and sodium alginate that can be used to adsorb and treat heavy metal pollutants in view of the technical problems existing in the prior art

Method used

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  • Sodium alginate and calcium ion modified charcoal composite material as well as preparation method and application thereof
  • Sodium alginate and calcium ion modified charcoal composite material as well as preparation method and application thereof
  • Sodium alginate and calcium ion modified charcoal composite material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] A kind of preparation of sodium alginate-calcium ion modified biochar composite material of the present invention, biochar raw material selects rice straw, and specific preparation method is as follows:

[0026] The biomass raw material was washed with deionized water, then dried at 70°C for 24 hours, the dried biomass was pulverized, and passed through a 2mm sieve to obtain biomass powder; 15.0g of CaCl 2 2H 2 O was added to 200mL of ultrapure water, and then 10.0g of biomass powder was added to the solution, and the mixed suspension was shaken in a shaking box at a speed of 150 rpm for 24 hours to obtain a biomass suspension; After the suspension was filtered, the filter residue was placed in an oven, and dried at 80°C for 24 hours to obtain a dry biomass powder loaded with calcium ions; the obtained dry biomass powder loaded with calcium ions was pyrolyzed and fired in a tubular atmosphere furnace, During the solution process, the quartz tube of the atmosphere furna...

Embodiment 2

[0029] The sodium alginate-calcium ion modified biochar composite material of the present invention treats the lead ion in the waste water, comprises the following steps:

[0030] Take 50mL of the heavy metal solution with an initial concentration of 0.5-2mmol / L, add the sodium alginate-calcium ion modified biochar composite material prepared in Example 1, the amount of the adsorbent is 0.025g, and the Carry out oscillating adsorption reaction, separate this adsorbent from waste water by filtration after 24 hours, measure the content of unadsorbed lead ions in waste water with atomic absorption instrument, the adsorption amount result of calculation is as shown in table 1:

[0031] Table 1: Adsorption capacity data of adsorbents under different initial concentrations of lead ions

[0032]

[0033] It can be seen from Table 1 that the adsorbent has an adsorption capacity of 0.190mmol / g under the condition that the initial concentration is 0.1mmol / L, and it increases with the...

Embodiment 3

[0035] The sodium alginate-calcium ion modified biochar composite material of the present invention treats the lead ion in the waste water, comprises the following steps:

[0036] Get 50mL of the lead ion solution whose initial concentration is 0.5mmol / L, add the sodium alginate-calcium ion modified biochar composite material that embodiment 1 makes, the consumption of this adsorbent is 0.5g / L in the constant temperature cultivation of different temperature Box (25, 30, 35 ℃) for adsorption, after 24 hours, the adsorbent was separated from the wastewater by filtration, and the content of unadsorbed lead ions in the wastewater was measured with an atomic absorption instrument. The calculated adsorption results are shown in the table 2 shows:

[0037] Table 2: Adsorption data of lead ions at different temperatures

[0038] temperature(℃)

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Abstract

The invention relates to a sodium alginate and calcium ion modified charcoal composite material as well as a preparation method and application thereof. The composite material is prepared by modifyingthe surface of charcoal serving as a matrix through calcium chloride dehydrate and sodium alginate. The preparation method comprises the following steps: based on a preparation order, mixing biomasspowder with calcium chloride dehydrate in a solution, thus obtaining a calcium ion loaded biomass, then performing pyrolysis to obtain calcium ion-loaded charcoal, and obtaining the product through crosslinking reaction of the sodium alginate and calcium ions. The sodium alginate-calcium ion-modified charcoal composite material disclosed by the invention has the characteristics of rich raw materials, low preparation cost, large number of adsorption sites, large adsorption amount, zero secondary pollution and the like, and is relatively high in lead ion removal efficiency.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and water treatment new technologies, and specifically relates to a sodium alginate-calcium ion modified biochar composite material and a preparation method and application thereof. Background technique [0002] The discharge of heavy metals to water bodies is extremely harmful to the environmental ecosystem. With the rapid development of industry, a large amount of heavy metal pollutants are discharged into water bodies. These heavy metal pollutants are non-degradable and have toxic effects on humans and animals. Therefore, it is necessary to explore a cost-effective technology for heavy metal treatment. General heavy metal wastewater treatment methods include adsorption, chemical precipitation, ion exchange, reverse osmosis, etc. Among them, adsorption is a simple operation, low cost, and relatively efficient technology for treating pollutants, which has been applied in the ac...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/041B01J20/20B01J20/24C02F1/281C02F1/283C02F1/286C02F1/288C02F2101/20
Inventor 邓佳钦李晓东刘云国梁婕曾光明魏雪陈绪武袁新亮徐婉君
Owner HUNAN UNIV
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