Preparation method of super-efficient sewage dephosphorization adsorbent

A phosphorus adsorbent, ultra-efficient technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem of reducing the effective contact area between MgO and solution, low Mg loading, and limiting phosphorus adsorption and other problems, to achieve the effect of strong anti-impurity anion interference performance, fast adsorption kinetics, and enhanced removal ability

Active Publication Date: 2020-09-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

The carbon matrix with larger particle size not only leads to lower Mg loading (molar ratio <20%), but also reduces the effective contact area between MgO and solution, thus limiting the further improvement of phosphorus adsorption by Mg-carbon composites. improve

Method used

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  • Preparation method of super-efficient sewage dephosphorization adsorbent
  • Preparation method of super-efficient sewage dephosphorization adsorbent
  • Preparation method of super-efficient sewage dephosphorization adsorbent

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Embodiment 1

[0036] Al containing 5g of magnesium bars 2 o 3 The ark is placed in a tube furnace, and the flow rate into the furnace is 70cm 3 / min of CO 2 Gas, heated to 680°C at a heating rate of 10°C / min to burn the magnesium strips. After 1 hour, the magnesium strips were completely burned. After cooling to room temperature naturally, the solid product was collected and washed with deionized water, and then dried in an oven at 80°C. A super-efficient sewage phosphorus removal adsorbent is obtained.

[0037] figure 1 In the XRD pattern of , the diffraction peaks at 37.10°, 43.08°, 62.46°, 74.86° and 78.78° correspond to (111), (200), (220), (220) and (311) and (222) crystal planes; there is a very low intensity diffraction peak near 26°, corresponding to the (002) crystal plane of C. This result indicated that the adsorbent containing MgO crystals and amorphous carbon was successfully prepared (the prepared adsorbent can also be called magnesium-based nanocomposite carbon material)...

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Abstract

The invention relates to a preparation method of a super-efficient sewage dephosphorization adsorbent, and belongs to the technical field of sewage treatment and adsorbents. According to the method, based on a reaction that magnesium metal is combusted in a carbon dioxide atmosphere, MgO crystals and amorphous carbon are generated at the same time simply and quickly in one step; the two substancesare uniformly combined in a nanometer scale, so that the formed magnesium-based nano composite carbon material can be used as the super-efficient sewage dephosphorization adsorbent. The adsorbent hasextremely fast adsorption kinetics, a wide pH application range and relatively strong impurity anion interference resistance, the adsorption capacity of the adsorbent to phosphorus in a solution is higher than 1000mg/g, and the efficient and rapid phosphorus removal effect can be achieved in actual sewage with various complex components. The method disclosed by the invention is simple to operate,short in preparation period and rich and cheap in raw material source, and the adsorbent has no toxicity to the environment, does not cause secondary pollution during preparation of the adsorbent andphosphorus removal application, and has a very good application prospect.

Description

technical field [0001] The invention relates to a preparation method of an ultra-efficient sewage dephosphorization adsorbent, which belongs to the technical field of sewage treatment and adsorbent. Background technique [0002] With the increasing development and utilization of environmental resources by human beings, the continuous development of urbanization and industrialization, and the extensive use of agricultural chemical fertilizers and phosphorus-containing detergents, the nitrogen and phosphorus nutrients entering lakes, reservoirs and rivers continue to increase. Algae blooms are caused, which leads to eutrophication of large areas of water. Eutrophication not only seriously damages the ecological environment of the water body, reduces the use function of the water body, accelerates the decline of the water body, but also affects shipping and hinders economic development. At present, the problem of eutrophication in water bodies such as rivers and lakes in my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/04B01J20/30C02F1/28C02F101/10
CPCB01J20/041B01J20/20B01J20/3078C02F1/288C02F2101/105
Inventor 姚莹王美玲赵托张艳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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