Nano-manganese-oxide-modified biomass charcoal, preparation method and method for removing copper citrate

A technology of biomass charcoal and copper citrate, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve problems such as poor removal effect, and achieve the effect of good effect, easy repeatability and efficient removal

Active Publication Date: 2020-02-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large molecular structure and high stability of complexed metals, the removal effect of complexed metals by using only biochar is relatively poor.

Method used

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  • Nano-manganese-oxide-modified biomass charcoal, preparation method and method for removing copper citrate
  • Nano-manganese-oxide-modified biomass charcoal, preparation method and method for removing copper citrate
  • Nano-manganese-oxide-modified biomass charcoal, preparation method and method for removing copper citrate

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Experimental program
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preparation example Construction

[0034] Step 1: Preparation of nano-manganese oxide modified biochar: a preparation method of nano-manganese oxide modified bio-char, comprising the following steps:

[0035](11) Synthesis of nano-manganese oxides: Add coconut shell biochar to 0.15M potassium permanganate solution, keep the liquid-solid ratio at 1 / 10, keep stirring, filter, and dry; after cooling to room temperature, use anhydrous Ethanol impregnation, slowly reducing the potassium permanganate loaded on the biochar, and then filtering and drying;

[0036] (12) Carbonization: the material obtained in step (1) is placed in a tube furnace, roasted at a high temperature in an air atmosphere, and then cooled to room temperature to obtain nano-manganese oxide modified biochar.

Embodiment 1

[0038] This embodiment provides the preparation of nano-manganese oxide modified biochar, including the following steps:

[0039] (1) Material preparation: coconut shell biochar, 0.15M potassium permanganate solution, absolute ethanol;

[0040] (2) Synthesis: 1g of coconut shell biochar was added to 10mL of 0.15M potassium permanganate, magnetically stirred at 300rpm for 4h, filtered and dried in a constant temperature oven at 90°C for 12h; cooled to room temperature, soaked in 10mL of absolute ethanol for 10min, After filtering, dry in a constant temperature oven at 90°C for 12 hours;

[0041] (3) Carbonization: put the material obtained in step (2) into a tube furnace for calcination at 400° C. for 1 h in an air atmosphere; cool to room temperature and take it out for use.

[0042] Such as figure 1 Shown is the morphology of the nano-manganese oxide modified biochar prepared by the present invention. figure 1 Among them, a is the scanning electron microscope image, the su...

Embodiment 2

[0050] The present embodiment provides the method for removing copper citrate by extracting nano-manganese oxide modified biomass charcoal, comprising the following steps:

[0051] (1) Determination of the optimum dosage: at room temperature, first take 0.01, 0.05, 0.1, and 0.15 g of the nano-manganese oxide modified biochar obtained in Example 1 and put them into an Erlenmeyer flask; add 100 mL of pH value of about It is a 7.8 copper citrate solution, stirred at a constant speed, in order to achieve full adsorption equilibrium, shake at room temperature for 24 hours, take samples at different time intervals, filter with a 0.45 μm filter membrane, and refrigerate at 4°C for testing. The removal rate of metal copper was analyzed by inductively coupled plasma mass spectrometry, and the optimal dosage was determined to be 1g / L, and this optimal dosage was applied to follow-up research.

[0052] (2) Investigation of influencing factors: Since copper citrate exists stably in a wide...

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Abstract

The invention discloses a nano-manganese-oxide-modified biomass charcoal and a preparation method. A nano-manganese-oxide-modified biomass charcoal composite material is synthesized as an adsorbent bycombining the advantages of each of the biomass charcoal and manganese oxide, good stability and oxidability are achieved, and the treatment of contaminated water containing complex heavy metal has low cost, high-efficiency and no secondary pollution. The invention further discloses a method for removing copper citrate by using nano-manganese-oxide-modified biomass carbon and a mechanism study. The preparation method of the nano-manganese-oxide-modified biomass charcoal comprises the steps that (11) nano manganese oxide is synthesized, coconut shell biomass charcoal is added to a 0.15M potassium permanganate solution, a liquid-solid ratio of 1 / 10 is maintained, the mixture is continued to be stirred, filtered and dried; after the mixture is cooled to a room temperature, the mixture is impregnates with absolute ethyl alcohol, then filtered and dried; and (12) carbonization is carried out, the material obtained in the step (11) is placed in a tube furnace, and the mixture is roasted atair atmosphere and then cooled to the room temperature.

Description

technical field [0001] The invention belongs to the field of complex heavy metal treatment, and in particular relates to a nano-manganese oxide modified biomass charcoal, a preparation method and a method for removing copper citrate. Background technique [0002] The severity of water pollution has attracted worldwide attention. Heavy metal pollution generally comes from wastewater discharged from industries, such as mining, metallurgy, electroplating, pharmaceuticals, paint and other industries, causing a variety of heavy metals such as lead, cadmium, mercury, copper, chromium, etc. to directly enter the water body. At the same time, during the mining process of metal ore, the heavy metals remaining in the soil will also flow into the water body after being washed by rainwater, causing water pollution. Under the action of the adsorption of suspended solids in the water body, heavy metals migrate from the water body to the surface of the suspended solids and flow with them....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/72C02F101/30C02F101/20
CPCB01J20/0222B01J20/20B01J20/3085B01J2220/4806C02F1/281C02F1/72C02F2101/20C02F2101/30
Inventor 范文宏朱颖
Owner BEIHANG UNIV
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