Phosphorus removal adsorbent for loading composite metal via active carbon fiber and preparation method of phosphorus removal adsorbent

A technology of activated carbon fibers and composite metals, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low phosphorus affinity, rare earth materials are not easy to obtain in large quantities, and are expensive. The preparation method is novel and simple, the preparation process time is short, and the effect of excellent adsorption performance

Inactive Publication Date: 2013-07-17
SHANGHAI UNIV
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AI Technical Summary

Problems solved by technology

[0006] Ferric salt materials are easy to obtain and cheap. The main application in the early days was generally concentrated on chemical phosphorus removal, which consumes a lot and causes secondary pollution.
Iron adsorbent has good adsorption and phosphorus removal effect, but there is still a certain gap with the excellent adsorbent performance; active rare earth lanthanum adsorbent has been proved to have excellent adsorption and phosphorus removal effect in previous literature, and its adsorption capacity is higher than that of similar adsorption However, rare earth materials are not easy to obtain in large quantities, the price is relatively expensive, and it is difficult to realize industrial application; activated carbon fiber is a new type of adsorption functional material, which has a unique pore structure, developed micropores, wide sources, low price, and specific surface area. Adsorption characteristics such as large size and easy regeneration
However, activated carbon fiber has low affinity for phosphorus in environmental wastewater, few adsorption sites, and low removal rate. It is difficult to meet the standard for wastewater treatment only with activated carbon fiber.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment one: the concrete steps of this embodiment are:

[0020] a. Prepare 10 mL of a mixed solution of ferric nitrate and lanthanum nitrate with a total molar concentration of 0.1 mol / L with the molar ratio of iron-lanthanum ions at 1:9.

[0021] b. Cut the activated carbon fibers into 0.4-0.6cm cubes, wash with water for several times, soak in deionized water, filter and dry;

[0022] c. Weigh 0.2 g of the activated carbon fiber obtained in step b, add it to the suspension obtained in step a, soak for 10 min, and filter;

[0023] d. After drying the solid obtained in step c at 105°C, activate it with a muffle furnace at 650°C for 120 minutes; wait until it cools down to room temperature to obtain the adsorbent, and keep it sealed.

[0024] The adsorption capacity data of the composite phosphorus removal adsorbent in this example are shown in Table 1.

Embodiment 2

[0025] Embodiment 2: The technical solution of this embodiment is basically the same as that of Embodiment 1, the difference lies in:

[0026] In step a, 10 mL of a mixed solution of ferric nitrate and lanthanum nitrate with a total molar concentration of 0.1 mol / L was prepared with an iron-lanthanum ion molar ratio of 3:7. The adsorption capacity data of the composite phosphorus removal adsorbent in this example are shown in Table 1.

Embodiment 3

[0027] Embodiment 3: The technical solution of this embodiment is basically the same as that of Embodiment 1, the difference lies in:

[0028] In step a, 10 mL of a mixed solution of ferric nitrate and lanthanum nitrate with a total molar concentration of 0.1 mol / L was prepared with an iron-lanthanum ion molar ratio of 1:1. The adsorption capacity data of the composite phosphorus removal adsorbent in this example are shown in Table 1.

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Abstract

The invention discloses a phosphorus removal adsorbent for loading composite metal via active carbon fiber and a preparation method of the phosphorus removal adsorbent. The adsorbent disclosed by the invention is loaded with lanthanum oxide and iron oxide by taking the active fiber as a substrate, wherein the total mass of the lanthanum oxide and the iron oxide is 27.6-28.4% of the mass of the active carbon fiber. The preparation method of the novel phosphorus removal adsorbent by loading the iron oxide and the lanthanum oxide on the active carbon fiber substrate in appropriate preparation manners by taking the active carbon fiber as the substrate is more reasonable and easy to achieve. By adopting the embodiment of the invention, the novel phosphorus removal adsorbent having the advantages of good economical efficiency and excellent adsorption property can be prepared; and the preparation method is novel and simple. The whole preparation process is short in time and low in energy consumption.

Description

technical field [0001] The invention relates to a phosphorus-removing adsorbent and a preparation method thereof, in particular to an activated carbon fiber-loaded phosphorus-removing adsorbent and a preparation method thereof. Background technique [0002] The eutrophication of closed water bodies has become a serious environmental problem, affecting and restricting the coordinated development of society. Nitrogen and phosphorus nutrients are the main compounds that cause eutrophication of water bodies. According to statistics, the eutrophication of major lakes in my country due to nitrogen and phosphorus pollution accounts for more than 56% of the statistical lakes. Effective removal of phosphorus in wastewater is of great significance to reduce water pollution and eliminate eutrophication of rivers and lakes. Therefore, the development of efficient and cheap phosphorus removal adsorbents and related technologies has become one of the urgent tasks in the field of environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 张玲李梦雪高燕周奇赵锰
Owner SHANGHAI UNIV
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