Preparation method and application of carbon-based phosphorus-doped ferrihydrite

A ferrihydrite, carbon-based technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as low adsorption efficiency of heavy metal lead

Active Publication Date: 2021-09-07
NORTHEAST AGRICULTURAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that traditional adsorbents have low adsorption efficiency of heavy metal lead, and provide a kind of preparation method of carbon-based phosphorus ferrihydrite and its application

Method used

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  • Preparation method and application of carbon-based phosphorus-doped ferrihydrite
  • Preparation method and application of carbon-based phosphorus-doped ferrihydrite
  • Preparation method and application of carbon-based phosphorus-doped ferrihydrite

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specific Embodiment approach 1

[0018] Specific embodiment one: the preparation method of a kind of carbon-based phosphorous ferrihydrite of present embodiment, carries out according to the following steps:

[0019] 1. Put the biomass powder in a tube furnace, raise the temperature to 600-800°C in an inert gas atmosphere, and keep it at 600-800°C for 1-2 hours. After the heat preservation is over, cool it down to room temperature. Grind and cross 150 mesh sieves to obtain biochar; biochar is added to Fe(NO 3 ) 3 solution, after mixing evenly, a mixed solution A is obtained, and the quality of the biochar is the same as that of Fe(NO 3 ) 3 The volume ratio of the solution is (2 ~ 3g): (50 ~ 75mL);

[0020] Second, the 1mol L -1 KH 2 PO 4 The solution was added to 5mol·L -1 In the KOH solution, after stirring evenly, a mixed solution B is obtained, and the KH 2 PO 4 The volume ratio of the solution to the KOH solution is (50-75): (100-150); at a temperature of 60-80°C, add the mixed solution A dropwis...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the biomass powder described in step 1 is prepared according to the following steps: After the biomass is air-dried at room temperature, it is completely pulverized, then passed through a 100-mesh sieve, and then sieved at 60 drying at ~80°C to obtain biomass powder, and the biomass is crop straw or livestock and poultry manure.

[0026] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the biomass powder is placed in a tube furnace, and the temperature is raised at a rate of 10-20°C / min under an atmosphere of an inert gas. to 600-800°C.

[0028] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method and application of carbon-based phosphorus-doped ferrihydrite, which relate to the technical field of water treatment and aim to solve the problem of low adsorption efficiency of a traditional adsorbent on heavy metal lead. The method comprises the following steps of adding a 1 mol.L<-1> KH2PO4 solution into a 5 mol.L<-1> KOH solution, and uniformly stirring to obtain a mixed solution B, under the temperature condition of 60-80 DEG C, dropwise adding the mixed solution A into the mixed solution B, continuously stirring for 48-72 h after dropwise adding is completed, acquiring a mixed solution C, wherein the molar ratio of Fe to P in the mixed solution C is 1: 1, aging the mixed solution C at the temperature of 60-80 DEG C for 24-48 hours, washing with deionized water for 3-5 times, centrifuging, drying, grinding, and sieving with a 100-mesh sieve to obtain the carbon-based phosphorus-doped ferrihydrite. The preparation method and application of the carbon-based phosphorus-doped ferrihydrite can be obtained.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method and application of carbon-based phosphorus-doped ferrihydrite. Background technique [0002] In recent years, with the rapid development of industry and agriculture, many serious environmental pollution problems have emerged. Among them, heavy metal pollution is a typical type of environmental pollution. It can exist in the natural environment for a long time and cannot be degraded. It is extremely harmful to the natural ecology, and can eventually enter the human body through the accumulation of microorganisms, animals and plants. Among them, lead is a common heavy metal pollutant in the environment. Lead has a long half-life in the human body, and its toxicity can act on various systems and organs throughout the body, mainly affecting the nervous, hematopoietic, digestive, cardiovascular, kidney and immune systems. Therefore, it is urgent to find a...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/28057C02F1/281C02F1/283C02F2101/20B01J2220/4825B01J2220/4887
Inventor张颖江群李辉李绍峰王欢
OwnerNORTHEAST AGRICULTURAL UNIVERSITY