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A preparation method of biochar modified material for removing phosphorus in eutrophic water body

A technology of eutrophication and modified materials, which is applied in the direction of chemical instruments and methods, water pollutants, soil conditioning materials, etc., can solve the problems of high cost of modified biochar, influence of product application, complicated process, etc., and achieve good adsorption The effect of removal ability, low cost and simple process

Active Publication Date: 2021-12-10
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned biochar modification methods for preparing phosphorus removal agents all need to use a muffle furnace for high-temperature pyrolysis, resulting in a significant increase in energy consumption for biochar modification; The cost of biochar preparation is high, and product applications are affected

Method used

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  • A preparation method of biochar modified material for removing phosphorus in eutrophic water body
  • A preparation method of biochar modified material for removing phosphorus in eutrophic water body

Examples

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Effect test

Embodiment 1

[0019] A method for preparing a biochar modified material for removing phosphorus in eutrophic water bodies, comprising the steps of:

[0020] Step 1. Wash the apricot shells with a particle size of 0.5-4 mm with clean water to remove impurities on the surface of the biochar, and air-dry them naturally. The washed biochar was pulverized and sieved to obtain biochar powder with a particle size of 150 μm.

[0021] Step 2. Soak the biochar powder in the iron-manganese mixed solution with a volume of 100ml, and the FeCl in the iron-manganese mixed solution 3 and KMnO 4 The concentration is 0.05mol / L, the soaking time is 48h, after washing and filtering, the filtrate is colorless and neutral, and the pH is 7.0. Drying for 24 hours under the condition of 105° C. in a blast oven to obtain a composite metal-modified biochar functional material. It is measured that under the condition of different volumes of iron-manganese mixed solutions, the adsorption removal rate of 0.1g modifie...

Embodiment 2

[0025] A method for preparing a biochar modified material for removing phosphorus in eutrophic water bodies, comprising the steps of:

[0026] Step 1. Wash the walnut shells with a particle size of 0.5-4mm with clean water to remove impurities on the surface of the biochar, and then air-dry them naturally. The washed biochar was crushed and sieved to obtain biochar powder with a particle size of 150 μm.

[0027] Step 2. Soak the biochar powder in 150mL of 0.050mol / L FeCl 3 ·6H 2 O and 0.025mol / LKMnO 4 In the mixed solution, the soaking time is 24h, and then filtered until the filtrate is colorless and neutral, with a pH of 7.5. Dry at 105° C. for 24 hours in a blast drying oven to obtain a composite metal-modified biochar functional material. It is measured that the adsorption and removal rate of the functional material to low-concentration phosphorus (0.5 mg / L) is 78.92%, and the adsorption capacity is 0.79 mg / g. The results are shown in Table 2.

[0028] Table 2 Phosph...

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Abstract

The invention provides a method for preparing a biochar modified material for removing phosphorus in eutrophic water bodies, which comprises the following steps: step 1, washing, drying, natural air-drying, pulverizing, and sieving the biochar raw material of fruit shells to obtain biological Charcoal powder; step 2, load the processed biochar powder: mix the fruit shell biochar powder and the mixed solution of iron and manganese, fully soak, filter and wash until the filtrate is colorless and neutral, and then dry to obtain the Biochar modified materials. The functional material prepared by the present invention, which uses fruit shell biochar as a raw material, enriches the surface of the fruit shell biochar with a large amount of iron oxides and manganese oxides by modifying it, thereby enhancing the chemical adsorption capacity for phosphate, greatly The removal rate of low-concentration phosphorus in natural water or waste water is improved; the functional material using fruit shell biochar as raw material involved in the present invention has good adsorption and removal capacity for low-concentration phosphate in water, and will not cause secondary pollution to water. Pollution.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of environmental functional materials and solid waste resources, in particular to a method for preparing biochar modified materials for removing phosphorus in eutrophic water bodies. Background technique [0002] The problem of eutrophication in my country's lakes and reservoirs is becoming more and more serious. Nitrogen and phosphorus pollution are the main causes of eutrophication in lakes and reservoirs. Phosphorus is the limiting factor leading to eutrophication of water bodies. At present, the phosphorus content in the primary effluent of sewage treatment plants is low (0.5mg / L), while the inferior V standard value of total phosphorus in lakes and reservoirs in the "Environmental Quality Standards for Surface Water" (GB3838-2002) is 0.2mg / L. Phosphorus-containing water discharged into lakes and reservoirs after being treated by sewage treatment plants will still cause eutrophicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02C02F1/28B01J20/20C09K17/02B01J20/30C02F101/10
CPCB01J20/20C09K17/02C02F1/283C02F2101/105
Inventor 林莉孙婷婷高菲
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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