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Method for purifying water for engineering in island area by using modified coral sand

A coral sand and water purification technology, applied in chemical instruments and methods, seawater treatment, inorganic chemistry, etc., can solve problems such as problems that have not been solved well, and achieve the effect of easy detachment and good adsorption and storage effect

Active Publication Date: 2017-08-11
SECOND INST OF OCEANOGRAPHY MNR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But up to now, modifiers are mainly iron-based, aluminum-based, magnesium-based, manganese-based oxides or hydrated oxides, and rare earth metal compounds, and they are all in the laboratory research stage. still not well resolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Modified coral sand is used in the water purification method of an island project in Zhoushan. The content of organic matter, microorganisms, bacteria, algae and other pollutants in the offshore seawater of the island is high. Take two sets of 20ml offshore seawater and centrifuge them with a centrifuge. The centrifugation condition is 4500rpm, 1min, and Finish removing the supernatant, weigh the residual solids, the average solids content is 1.8mg / 20ml,

[0026] (1) Pretreatment: Introduce the near seawater to the reservoir, add water-insoluble dextran of 1% mass of the total volume of the stored seawater, stir well, and naturally flocculate and settle at room temperature for 8 hours;

[0027] Take two groups of 20ml pretreated offshore seawater again and centrifuge them with a centrifuge at 4500rpm for 1min. After centrifugation, remove the supernatant and weigh the residual solids. The average solids content is 0.8mg / 20ml.

[0028] (2) Purification: The pretreated of...

Embodiment 2

[0037] Modified coral sand is used in the water purification method of an island project in Hainan. The content of organic matter, microorganisms, bacteria, algae and other pollutants in the offshore seawater of the island is high. Take two sets of 20ml offshore seawater and centrifuge them with a centrifuge at 4500rpm for 1min. Finish removing the supernatant, weigh the residual solids, the average solids content is 2.8mg / 20ml,

[0038] (1) Pretreatment: Introduce the near seawater to the reservoir, add water-insoluble dextran with a mass of 2.5% of the total volume of the stored seawater, stir well, and naturally flocculate and settle at room temperature for 6 hours;

[0039] Take two groups of 20ml pretreated offshore seawater again and centrifuge them with a centrifuge at 4500rpm for 1min. After centrifugation, remove the supernatant and weigh the residual solids. The average solids content is 1.5mg / 20ml.

[0040] (2) Purification: The pretreated offshore seawater in step ...

Embodiment 3

[0049] Modified coral sand is used in the water purification method of an island project in Qingdao. The offshore seawater of the island has high content of organic matter, microorganisms, bacteria, algae and other pollutants. Take two sets of 20ml offshore seawater and centrifuge them with a centrifuge at 4500rpm for 1min. After removing the supernatant, the residual solids were weighed, and the average solids content was 2.2mg / 20ml.

[0050] (1) Pretreatment: Introduce the near seawater to the reservoir, add water-insoluble dextran with a mass of 1.8% of the total volume of the stored seawater, stir well, and naturally flocculate and settle at room temperature for 7 hours;

[0051] Take two groups of 20ml pretreated offshore seawater again and centrifuge them with a centrifuge at 4500rpm for 1min. After centrifugation, remove the supernatant and weigh the residual solids. The average solids content is 1.0mg / 20ml.

[0052] (2) Purification: The pretreated offshore seawater in...

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Abstract

The invention relates to a method for purifying water for engineering in an island area by using modified coral sand. The method comprises the following steps: (1) pretreatment; (2) purification: coastal seawater pretreated in the step (1) is pumped into a filter tower filled with modified coral sand filler, the pretreated coastal seawater is adsorbed and purified by the filler in the filter tower, impurities are removed sufficiently, and purified water for engineering in the island area is obtained. According to the method, a uniform dispersion system is formed by uniformly mixing three raw materials, is used for coral sand modification and enters pores of the coral sand in an infiltration process, a three-dimensional pore structure adopting small pores (magnetic ordered mesoporous carbon or magnetic ordered mesoporous nickel ferrite) sleeved with large pores (the coral sand) is formed, compared with randomness of the pores of natural coral sand, the pore structure of the modified coral sand is ordered, large and small pores are well-proportioned, the modified coral sand has good adsorption and storage effects when used for seawater purification treatment, and impurity removal is further facilitated during follow-up backwash.

Description

technical field [0001] The invention relates to a method for using modified coral sand to purify engineering water in island areas. Background technique [0002] At present, the water source used for seawater utilization is mainly coastal seawater, which contains suspended solids, colloids and dissolved substances, and there are also a large number of organic matter, microorganisms, bacteria, algae and other pollutants, which are easily polluted. Therefore, the first step in carrying out seawater utilization projects is seawater purification. [0003] In the seawater purification process, filtration is an important link and a key process to ensure the quality of effluent water. In recent years, with the intensification of nearshore seawater pollution, most of the traditional filter materials such as quartz sand and anthracite used in the filtration process have only obvious turbidity removal effect. The removal of pollutants in seawater, such as nitrogen, phosphorus, and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01J20/28B01J20/30B01J20/14C02F103/08
Inventor 谭勇华程杰莫微
Owner SECOND INST OF OCEANOGRAPHY MNR
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