Preparation method of adsorbent for removing phosphorus and heavy metal anions in water as well as application method

An adsorbent and heavy metal technology, applied in the field of magnetic water hyacinth biochar preparation, can solve the problem of high cost and achieve the effect of low cost, stable performance and low price

Inactive Publication Date: 2016-08-24
王欣 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a new type of adsorbent for phosphorus and heavy metal anions in water, which can improve the adsorption capacity of

Method used

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  • Preparation method of adsorbent for removing phosphorus and heavy metal anions in water as well as application method
  • Preparation method of adsorbent for removing phosphorus and heavy metal anions in water as well as application method
  • Preparation method of adsorbent for removing phosphorus and heavy metal anions in water as well as application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: adopt the following steps to implement the invention:

[0021] 1. Pre-treatment of water hyacinth: remove impurities from water hyacinth collected in unpolluted waters and air-dry it. After air-drying, place it in a blast drying oven at 60°C for overnight drying, crush it to 1-2mm, and put it into a self-sealing tape Store in a dry box for later use.

[0022] 2. Prepare iron solution: prepare a mixed solution of ferrous chloride and ferric chloride solution in a ratio of 1:1, each using 1M.

[0023] 3. Water hyacinth loaded with iron: according to the ratio of water hyacinth and iron solution 1:15 (W / V), take one part by weight of water hyacinth powder, pour it into the iron solution, stir well, and mix. And add 5M sodium hydroxide solution dropwise to adjust the pH value to ≈10, stir thoroughly for half an hour to one hour, then check the pH, if the pH changes, adjust it back to about 10. Filter or centrifuge the mixture, and bake in a vacuum oven at 60...

Embodiment 2

[0027] The method for preparing magnetic water hyacinth biochar as described in Example 1, the difference is that in the second step, iron solution is configured, and the concentrations of ferrous chloride and ferric chloride are both 0.5M.

Embodiment 3

[0029] The magnetic water hyacinth biochar preparation method as described in Example 1, the difference is that in the second step, iron solution is configured, and the concentrations of ferrous chloride and ferric chloride are both 0.1M.

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PUM

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Abstract

The invention discloses a preparation method of an adsorbent for removing phosphorus and heavy metal anions in water as well as an application method, and belongs to the fields of adsorbent technology and environmental pollution remediation. The adsorbent is magnetic water hyacinth biochar, and is prepared by the following steps: water hyacinth is dried and pulverized into powder; a proper amount of the water hyacinth powder and a mixed solution containing Fe2+ and Fe3+ are mixed with continuous stirring, and sodium hydroxide is added dropwisely till the pH value is about 10; after filtering, anaerobic pyrolysis is carried out at 250 DEG C or 450 DEG C, and washing, pumping filtration and drying are carried out in order to obtain the magnetic water hyacinth biochar. The application method is as follows: the biochar is added into waste water containing phosphor, arsenic, antimony and chromium, the initial concentration is 0.05-0.5mM, the dosage is 5g/l, a reaction is carried out for 24 hours at 25 DEG C, and the oscillation rate is 150r/min. The adsorbent is advantageous in that the adsorbent has a large capacity for adsorbing phosphor and heavy metal anions in water, the adsorbent is not easy to agglomerate, and after adsorption, the adsorbent is easy to separate and recycle.

Description

technical field [0001] The invention belongs to the field of adsorbent material preparation and environmental pollution control, and in particular relates to a preparation method of magnetic water hyacinth biochar. Background technique [0002] With the development of the economy and the progress of industry and agriculture, the discharge of various heavy metal anions and phosphorus-containing wastewater continues to increase. The problem of heavy metal pollution and eutrophication of water has become increasingly prominent. Heavy metals are difficult to degrade and dense in the environment, causing toxicity to animals, plants and humans. It is enriched through the food chain to the human body to cause teratogenic and carcinogenic hazards. Eutrophication of water body will cause a series of problems such as death of aquatic organisms, deterioration of water quality, and lack of drinking water. Therefore, the treatment of water heavy metal pollution or eutrophication has b...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58C02F1/62
Inventor 王欣张凤
Owner 王欣
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