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Preparation method of mango seed active biochar, prepared biochar and application thereof

A technology of mango pits and biochar, applied in the direction of biofuels, chemical instruments and methods, water pollutants, etc., can solve the problems of poor adsorption capacity of heavy metal cadmium and insufficient utilization of discarded mango pits, etc., achieve high carbonization rate, realize Effect of resource utilization and pollution reduction

Pending Publication Date: 2021-01-05
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems of poor adsorption capacity of heavy metal cadmium by the adsorbent and insufficient utilization of discarded mango kernels, the present invention provides a preparation method of mango kernel activated biochar, the prepared biochar and its application

Method used

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  • Preparation method of mango seed active biochar, prepared biochar and application thereof
  • Preparation method of mango seed active biochar, prepared biochar and application thereof
  • Preparation method of mango seed active biochar, prepared biochar and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A mango core activated biochar, which is prepared by the following method: (1) Wash the collected mango core waste with tap water, dry it in an oven at 60-65°C for 12 hours, and then use a pulverizer (FW80, Tianjin Tai Mango Stone Instrument Co., Ltd.) was crushed and passed through a 50-mesh sieve to obtain mango core powder; (2) Next, 50 g of mango core powder was placed in a 1000 mL beaker, and 625 mL of 10% H 2 o 2 In the solution, use an ultrasonic generator (SB-5200DT, Ningbo Xinzhi Biotechnology Co., Ltd.) to ultrasonically oscillate for 2 hours, filter out the filter residue, wash the filter residue with distilled water until the pH is neutral, and dry it at 60-65°C until constant. Heavy, crushed and passed through a 50-mesh sieve to obtain modified mango core powder; (3) Then, place the modified mango core powder in a quartz ark, and then place it in a tube furnace, turn on the nitrogen atmosphere, and then heat it at 10 °C / The heating rate was raised from ro...

Embodiment 2

[0036] In 4 10mL polyethylene centrifuge tubes, add respectively the mango nucleus activated biochar 0.005g, 0.01g, 0.05g, 0.1g of embodiment 1, then add 5mL concentration to each centrifuge tube and be the cadmium solution of 100mg / L, capping , placed in a constant temperature shaking box, shaken at 30°C at 150r / min for 8h, then filtered, and the concentration of cadmium was measured using an atomic absorption spectrophotometer (AA-300, PerkinElmer Instruments, Inc., USA), and the results were as follows Figure 4 shown.

[0037] Figure 4 It is the graph of the cadmium adsorption capacity of mango nuclear activated biochar under different dosages, which is determined by Figure 4It can be seen that with the increase of the dosage of activated biochar, the adsorption of cadmium by activated biochar decreases. This is because at low dosage, the active sites of activated biochar are occupied by cadmium. The active sites cannot be fully occupied, resulting in a decrease in the...

Embodiment 3

[0039] In 10 10mL polyethylene centrifuge tubes, add respectively the mango nuclear activated biochar 0.01g in embodiment 1, then add the cadmium solution of 5mL, 100mg / L to each centrifuge tube, seal, place in the constant temperature shaking box, in Shake at 150r / min at 30°C for 0.167h, 0.25h, 0.5h, 1h, 2h, 4h, 8h, 12h, 24h, and 48h, then filter, and use an atomic absorption spectrophotometer to measure the cadmium concentration. The results are as follows Figure 5 shown.

[0040] Figure 5 It is a graph of the adsorption capacity of cadmium by mango nuclear activated biochar at different adsorption times. Figure 5 It can be seen that the longer the adsorption time of mango nuclear activated biochar, the greater the adsorption capacity, and the adsorption reached equilibrium at 8 hours. Therefore, when removing cadmium in cadmium-containing wastewater, in order to save manpower and material resources, it is preferable to take an adsorption time of 8 hours.

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Abstract

The invention discloses a preparation method of mango seed activated charcoal. The preparation method comprises the following steps: 1) cleaning mango seeds, drying, crushing and sieving to obtain mango seed powder; 2) adding an H2O2 solution into the mango seed powder in the step 1), fully stirring, carrying out ultrasonic treatment, filtering to obtain filter residues, washing the filter residues with distilled water until the pH value is neutral, drying, crushing and sieving to obtain modified mango seed powder; (3) carbonizing the modified mango seed powder in the step (2) for 1.5-2.5 hours at the temperature of 300-700 DEG C under the protection of nitrogen, and cooling to room temperature to obtain mango seed biochar; and (4) washing the mango seed activated charcoal obtained in thestep (3) with distilled water until the pH value is neutral, drying, crushing, and sieving to obtain the mango seed activated charcoal. The mango seed activated charcoal prepared by the method can beused for effectively adsorbing cadmium in cadmium-containing wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a preparation method of mango kernel activated biochar, the prepared biochar and applications thereof. Background technique [0002] Cadmium (Cd) is a heavy metal commonly used in industry, widely used in electronics, chemical industry, nuclear energy, and electroplating industries, which causes a large amount of industrial cadmium-containing wastewater discharge. Cadmium is extremely toxic and has been listed as the seventh of the 20 most dangerous toxins by the U.S. Agency for Toxic Substances and Disease Registry. It can damage human organs, such as kidneys and liver, and is also carcinogenic. Cadmium cannot be removed through water self-purification. Cadmium produced by human activities enters human life and other organisms through bioaccumulation and food chains, seriously threatening human health and safety. Therefore, effective treat...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C10B53/02C02F101/20
CPCB01J20/20B01J20/3078C10B53/02C02F1/283C02F2101/20B01J2220/485Y02E50/10
Inventor 何俊瑜张黎明任艳芳薛宇豪魏启航韩川
Owner CHANGZHOU UNIV
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