Preparation method of sea urchin shaped microspheric lanthanum oxycarbonate adsorbent capable of removing phosphorus from water bodies

A lanthanum oxycarbonate and sea urchin-like technology is applied in the field of preparation of adsorbents, which can solve the problem of low saturated adsorption capacity, and achieve the effects of simple preparation process and good dephosphorization effect in water bodies.

Active Publication Date: 2016-07-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the studies on the application of lanthanum to phosphorus removal are based on lanthanum oxi

Method used

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  • Preparation method of sea urchin shaped microspheric lanthanum oxycarbonate adsorbent capable of removing phosphorus from water bodies
  • Preparation method of sea urchin shaped microspheric lanthanum oxycarbonate adsorbent capable of removing phosphorus from water bodies
  • Preparation method of sea urchin shaped microspheric lanthanum oxycarbonate adsorbent capable of removing phosphorus from water bodies

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specific Embodiment approach 1

[0019] Embodiment 1: This embodiment is a method for preparing a sea urchin-shaped microsphere lanthanum oxycarbonate adsorbent for dephosphorization in water, specifically according to the following steps:

[0020] 1. Synthesis of microsphere adsorbent precursor: dissolve trimesic acid in a mixture of water and ethanol with a volume ratio of 1:1, stir for 10 minutes to obtain a trimesic acid solution; dissolve lanthanum nitrate aqueous solution and tribenzene Mix the triformic acid solution evenly, put it in a constant temperature shaker, shake it for 1h~3h under the condition that the temperature of the shaker is 25°C and the speed of the shaker is 100r / min~200r / min, and then put it in the constant temperature shaker on the shaker Stand still for 0.5h at a temperature of 25°C to obtain a microsphere adsorbent precursor; the concentration of trimesic acid in the trimesic acid solution is 0.01mol / L to 0.1mol / L; the nitric acid The concentration of lanthanum nitrate in the lant...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the concentration of trimesic acid in the trimesic acid solution described in step 1 is 0.05 mol / L. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the concentration of lanthanum nitrate in the aqueous lanthanum nitrate solution described in step 1 is 0.05 mol / L. Others are the same as the first embodiment.

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Abstract

The invention discloses a preparation method of a sea urchin shaped microspheric lanthanum oxycarbonate adsorbent capable of removing phosphorus from water bodies, relates to a preparation method of an adsorbent capable of removing phosphorus from the water bodies, and aims to solve the technical problems that conventional phosphorus removing methods with lanthanum elements at present are mostly based on lanthanum oxide or introduction of a lanthanum element modified adsorbent, and the saturated adsorption quantity of the lanthanum oxide or the lanthanum element modified adsorbent is relatively low. The preparation method disclosed by the invention comprises the following steps: I, performing synthesis of a microspheric adsorbent precursor; II, performing washing and drying; III, performing calcining and shaping. The preparation technology of the lanthanum oxycarbonate adsorbent prepared by the preparation method disclosed by the invention is simple, large-scale preparation can be realized, the lanthanum oxycarbonate adsorbent has good phosphorus removing effects on the water bodies, phosphorus in eutrophication water bodies can be removed to the state that the phosphorus content is 5 [mu]g/L or below, the phosphorus removing rate reaches 99% or above, and the largest saturated adsorption quantity is as high as 255.72 mg/g. The preparation method disclosed by the invention is applied to the field of water treatment.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent for phosphorus removal in water bodies. Background technique [0002] Phosphorus is an important component of energy substances such as adenosine triphosphate in organisms, and is also an essential element for the synthesis of nucleic acids and certain proteins. In water bodies, phosphorus can promote the growth of aquatic plants and maintain the ecological balance of water bodies, but too much phosphorus in water bodies will lead to eutrophication of water bodies. The eutrophication of water bodies is mostly caused by human activities that discharge a large amount of nutrients such as phosphorus into water bodies. At present, rivers and lakes in most cities in China are already in a state of severe eutrophication, and have even lost their original water source function. Therefore, phosphorus removal from water bodies is very important to control eutrophication. Phosphorus removal by adsor...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/02B01J20/28C02F1/28
CPCB01J20/0277B01J20/28014C02F1/281C02F2305/04
Inventor 王威孙风莲崔福义何皎洁介石磊张欣彤陈焕凌梅
Owner HARBIN INST OF TECH
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