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Method for removing boron and phosphorus in wastewater by coupling shell powder

A technology for shell powder and wastewater, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc. The effect of good biocompatibility, low price and environmental protection, simple treatment method

Inactive Publication Date: 2021-04-09
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the existing boron removal method consumes a large amount of precipitant, slow reaction, high sludge output, high cost, membrane pollution, loss of extractant easily causes secondary pollution, large consumption of adsorbent, and difficulty in regeneration And the technical problems of easy loss and biological toxicity, and provide a method for coupling removal of boron and phosphorus in wastewater by using shell powder

Method used

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  • Method for removing boron and phosphorus in wastewater by coupling shell powder
  • Method for removing boron and phosphorus in wastewater by coupling shell powder
  • Method for removing boron and phosphorus in wastewater by coupling shell powder

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specific Embodiment approach 1

[0025] Specific implementation mode 1: This implementation mode is a method for coupling removal of boron and phosphorus in waste water by using shell powder, specifically according to the following steps:

[0026] 1. Clean the oyster shells ultrasonically, place them in an oven, and dry them at 60°C to 65°C; use a pulverizer to crush the dried oyster shells, and sieve them with a mesh size of 100 mesh to 400 mesh. The sieved oyster shell powder is placed in a muffle furnace, calcined at 750°C-1000°C for 3h-4h, and naturally cooled to room temperature to obtain modified shell powder;

[0027] 2. Add phosphate to the waste water containing boric acid to be treated, stir for 10min to 20min at a speed of 200r / min to 300r / min, and then add the modified shell powder prepared in step 1. Under the condition of 400r / min~500r / min, continue to stir for 5h~6h to complete the coupling removal of boron and phosphorus;

[0028] The molar ratio of the boron element in the waste water contai...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, dry at 60° C. for 24 hours. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the number of mesh in step one is 200 mesh. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for removing boron and phosphorus in wastewater by coupling shell powder, and relates to a method for removing boron and phosphorus in wastewater. The invention aims to solve the technical problems of consumption of a large amount of precipitant, slow reaction, high sludge yield, high cost, membrane pollution, secondary pollution easily caused by loss of an extraction agent, high consumption of an adsorbent, difficulty in regeneration, easiness in loss and biotoxicity in the conventional boron removal method. The raw material used in the method is waste oyster shell, the waste oyster shell is rich in source and low in price, and the problem of solid waste treatment can be solved. The method provided by the invention has large adsorption capacity on boron and phosphorus, can be used under medium-high boron concentration, and has a good removal effect on phosphorus. The method is simple to operate, low in treatment cost and free of toxic and harmful substances. The coupling material prepared by the preparation method disclosed by the invention is relatively good and stable in biocompatibility, can be reutilized, and meets the requirements of green and clean production.

Description

technical field [0001] The invention relates to a method for removing boron and phosphorus in waste water. Background technique [0002] With the rapid development of nuclear energy technology and nuclear energy applications, a large number of different types of nuclear industrial wastewater are discharged in large quantities, which contain not only radioactive substances, but also boron and phosphorus. How to treat them deeply and efficiently has become a key issue in the development of nuclear energy technology. In addition, boron-containing wastewater also exists in the glass industry. The toxicity threshold of boron in plants is very close. The excessive emission of boron and its compounds can also cause reproductive and developmental toxicity to animals and humans. If it forms complexes with heavy metal ions such as lead, copper, nickel, and cadmium, the toxicity is even higher. big. The discharge of large amounts of phosphorus leads to the occurrence of algal blooms ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/04B01J20/30C02F101/10
CPCB01J20/043C02F1/281C02F2101/108C02F2101/105
Inventor 杨周驰昊陈素华邱贤华张秋根
Owner NANCHANG HANGKONG UNIVERSITY
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