Adsorbent and preparation method and application thereof

An adsorbent and reaction technology, applied in the field of environmental remediation, can solve problems such as failure to meet emission standards, weak adsorption capacity of the adsorbent, weak adsorption capacity of ammonium nitrogen, etc.

Active Publication Date: 2020-09-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the application provides an adsorbent and its preparation method and application, which can effectively solve the weak adsorption capacity of existing adsor

Method used

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  • Adsorbent and preparation method and application thereof
  • Adsorbent and preparation method and application thereof
  • Adsorbent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The embodiment of the present application provides the adsorption performance test of the adsorbent prepared by different pyrolysis temperatures and times, and the specific steps are as follows:

[0042] 1. Adsorbents prepared at different pyrolysis temperatures adsorb NH in water 4 + The reaction equilibrium time of :

[0043] 1. Acquisition of scallion plant powder: select healthy and well-growing aquatic plant scallion, after cleaning, cutting, drying, crushing, sieving, etc., put it into a sealed bag and put it in a desiccator for use. Get scallion plant powder.

[0044]2. Weigh 50g of scallop plant powder through 80 mesh sieve and soak in 1000mL of 20%H 2 SO 4 solution, after mixing, place it in a constant temperature oscillator at 120rmp and 25°C for 24h. Centrifuge the shaken sample mixture in a centrifuge at 8000r / min for 10min, remove the upper layer solution, dry the remaining mixture in an oven at 80°C, put an appropriate amount in a quartz ark, put it i...

Embodiment 3

[0069] The embodiment of the present application provides the influence of external factors on the adsorption performance of the adsorbent of Dahe biochar, and the specific steps are as follows:

[0070] (1) Influence of eutrophication water body pH on the adsorption performance of the stalk biochar adsorbent of the embodiment of the present application:

[0071] Take 0.2g of HPS-450-1 prepared above and add it into a 250mL conical flask filled with 200mL of simulated eutrophication water, set 3 parallel samples in each group, adjust the concentration of simulated eutrophication water with NaOH and HCl The initial pH of the solution is 3, 5, 7, 9, 11 respectively. After capping, oscillate and absorb in a constant temperature oscillator at 200r / min and 25°C for 72h, take it out, draw the supernatant into a 50mL centrifuge tube with a syringe, and After centrifugation with a speed of 8000r / min for 10min, use a 0.45μm pore size microporous filter membrane to filter, and measure t...

Embodiment 4

[0077] The embodiment of the present application provides the effect of using the modifier and not using the modifier to prepare the Dazai biomass charcoal adsorbent on the adsorption and purification of eutrophic water. The steps are as follows:

[0078] 1. Acquisition of scallion plant powder: select healthy and well-growing aquatic plant scallion, after cleaning, cutting, drying, crushing, sieving, etc., put it into a sealed bag and put it in a desiccator for use. Get scallion plant powder.

[0079] 2. Weigh 50g of the scallop plant powder passed through the 80-mesh sieve without modification, put it directly in the quartz ark, put it into the tube furnace and cover it, and keep the flow rate of 40ml / min in the tube furnace Introduce nitrogen to keep the furnace in an oxygen-free or oxygen-deficient state. Set the program parameters so that the tube furnace maintains a heating rate of 10°C / min and continues to heat up to 450°C. After the pyrolysis is maintained at a constan...

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Abstract

The invention belongs to the technical field of environmental remediation, and particularly relates to an adsorbent and a preparation method and application thereof. The preparation method of the adsorbent comprises the following steps of: step 1, mixing pistia stratiotes plant powder with a modifier for modification, and drying to obtain modified pistia stratiotes; step 2, carrying out high-temperature cracking reaction on the modified pistia stratiotes in an anaerobic or anoxic state in a protective atmosphere to obtain pistia stratiotes charcoal; and step 3, mixing the pistia stratiotes charcoal with an acid-base regulator, rinsing until the pistia stratiotes charcoal is neutral, and drying to obtain the adsorbent. According to the adsorbent and the preparation method and application thereof, the technical defects that an existing adsorbent is weak in adsorption capacity, particularly weak in adsorption capacity for ammonium nitrogen in a polluted water body, incapable of meeting the emission standard and incapable of meeting the requirements of people can be effectively overcome.

Description

technical field [0001] The application belongs to the technical field of environmental restoration, and in particular relates to an adsorbent and its preparation method and application. Background technique [0002] Water is the foundation of human survival and development, but what humans can directly use currently only accounts for 0.65% of fresh water resources. In recent years, due to people's irrational production and living, excessive nitrogen and phosphorus nutrients have flowed into natural waters, and eutrophication has occurred in a large number of waters, resulting in a shortage of water resources that humans can directly use, and seriously affecting the rapid development of my country's economy. , damage human health. Phytoremediation technology is a research upsurge in recent years in water area governance, but there are still deficiencies in this governance method. It is necessary to salvage plants in time to control the coverage of plants in the water body, an...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/16
CPCB01J20/20B01J20/28057C02F1/283C02F2101/16Y02W10/10
Inventor 周淑贤陆梓晴邓志威彭巍傅明辉
Owner GUANGDONG UNIV OF TECH
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