Sodium alginate embedded novel iron carbon-medical stone efficient phosphorus removal particle and preparation method thereof

A sodium alginate and medical stone technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of slow iron-carbon micro-electrolysis and low phosphorus removal effect

Active Publication Date: 2020-07-07
ZHENGZHOU UNIV +1
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Problems solved by technology

However, the effect of iron-carbon micro-electrolysis is relatively slow, and the effect of phosphorus removal in the early stage is slightly lower, while the adsorption of medical stone is faster, which can w

Method used

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  • Sodium alginate embedded novel iron carbon-medical stone efficient phosphorus removal particle and preparation method thereof
  • Sodium alginate embedded novel iron carbon-medical stone efficient phosphorus removal particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, the specific steps for preparing the novel iron-carbon-medicine stone high-efficiency phosphorus removal particles embedded in sodium alginate are as follows:

[0029] (1) Grinding and sieving woody activated carbon to make the particle size less than or equal to 150 μm;

[0030] (2) Prepare 200mL of 10wt% calcium chloride solution;

[0031] (3) Prepare 100mL of 2wt% sodium alginate solution: add sodium alginate to water, stir well, put it in a 65°C oven and heat for 60min, and stir continuously until it is completely dissolved;

[0032] (4) Add 8g of uniformly mixed elemental iron, activated carbon, and medical stone to the 2wt% sodium alginate solution in step (3), and mix evenly to form a mixed solution; the mass of the above-mentioned elemental iron, activated carbon, and medical stone The ratio is 2:1:1.

[0033] (5) Use a syringe to drop the mixed solution in step (4) into the calcium chloride solution in step (2) to obtain gel beads, which are ...

Embodiment 2

[0036] The specific steps for preparing gel beads containing only sodium alginate in this embodiment are:

[0037] (1) Prepare 200mL of 10wt% calcium chloride solution;

[0038] (2) Prepare 100mL of 2wt% sodium alginate solution: add sodium alginate to water, stir well, put it in a 65°C oven and heat for 60min, and stir continuously until it is completely dissolved;

[0039] (3) Use a syringe to drop the sodium alginate solution in step (2) into the calcium chloride solution in step (1) drop by drop to obtain gel beads, which are left to solidify at 25°C for 24 hours;

[0040] (4) Filter out the solidified gel beads to obtain gel beads.

Embodiment 3

[0042] Evaluation of the dephosphorization performance of the gel beads prepared in above-mentioned embodiment 1 and embodiment 2

[0043] Prepare KH with an initial concentration of 50mg / L 2 PO 4 The solution simulates phosphorus-containing wastewater, and the gel beads prepared in Examples 1 and 2 are respectively added, and shaken at a speed of 150 rpm for 96 hours under the condition that the solid-to-liquid ratio is 1:50.

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Abstract

The invention discloses a sodium alginate embedded novel iron carbon-medical stone efficient phosphorus removal particle, and also discloses a preparation method of the phosphorus removal particle. The phosphorus removal particle comprises 1-3 g of medical stone, 1-3 g of activated carbon, 1-4 g of sodium alginate, 3-5 g of iron powder, 290-310 mL of deionized water and 10-25 g of calcium chloride. The phosphorus removal particle not only can overcome the defects that iron, carbon and medical stone are easy to migrate along with water flow, iron powder is easy to agglomerate, the phosphorus removal effect in the early stage of iron-carbon filler is slow and the like when being independently used as carrier filler, but also can give full play to various effects such as electrochemistry, physical adsorption, chemical flocculation precipitation and the like so as to achieve the purpose of phosphorus removal. Besides, the sodium alginate embedded novel iron carbon-medical stone efficient phosphorus removal particles prepared by the invention do not need to add a pore forming agent or high-temperature roasting, are simple and convenient in preparation method, have the advantages of lowenergy consumption, good treatment effect, wide application range, low cost and the like, and have relatively high research value and unique application advantages.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a phosphorus removal particle and a preparation method thereof. Background technique [0002] In recent years, with the development of my country's industry and agriculture, water pollution has become increasingly serious. According to the 2017 "China Environmental Status Bulletin" reported by the Ministry of Ecology and Environment, although the total phosphorus concentration in the national surface water has decreased by 11.5% year-on-year, the proportion of exceeding the standard section is 19.1%, exceeding the chemical oxygen demand and ammonia nitrogen, becoming the main pollutant affecting the quality of surface water in the country. This shows that water eutrophication, especially phosphorus removal in water, has become a major problem to be solved urgently. [0003] At present, the commonly used phosphorus removal methods at home and abroad: chemical m...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/461C02F1/52C02F101/10
CPCC02F1/281C02F1/46104C02F1/5236C02F2101/105
Inventor 高镜清李强段浩宇张敬申赵杰郭晗白光普王文垅
Owner ZHENGZHOU UNIV
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