Coated particles, process for production thereof, cation adsorbents, and water treatment system

A manufacturing method and cation technology, applied in the direction of ion exchange water/sewage treatment, ion exchange treatment device, cation exchange, etc., can solve the problems of chlorine odor hazard, generation of trihalomethane, excess input, etc., and achieve high adsorption capacity, The effect of fast regeneration speed and fast adsorption speed

Inactive Publication Date: 2009-09-16
图莱乐株式会社 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the treatment capacity of nitrogen compounds in the primary treatment process increases, excessive chlorine may be injected when the treatment amount of nitrogen compounds in the secondary tre

Method used

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  • Coated particles, process for production thereof, cation adsorbents, and water treatment system
  • Coated particles, process for production thereof, cation adsorbents, and water treatment system
  • Coated particles, process for production thereof, cation adsorbents, and water treatment system

Examples

Experimental program
Comparison scheme
Effect test

Example

[0106] (Example 1 and Comparative Example 1)

[0107] [Table 4]

[0108]

[0109] It can be seen from the above examples that the ammonium ion reaches the adsorption equilibrium within 5 minutes with the target 1 ppm or less. In addition, in this case, the other ions contained in the test water also became saturated concentrations or less than the detection limit in 5 minutes. In contrast, in Comparative Example 1, it took more than 10 minutes to reach the adsorption equilibrium.

Example Embodiment

[0110] (Example 2)

[0111] The adsorbent sample is the ES80 used in Example 1. The test water was the same as the ammonia water used in Example 1. Measure the NH of treated water after 1 minute and 3 minutes after contact with cationic adsorbent 4 + The concentration of ions.

[0112] Furthermore, it can be confirmed from this Example 2 that the adsorbent of the present invention reached the adsorption equilibrium within 1 minute.

[0113] [table 5]

[0114] Ion type: NH 4 + The initial concentration 1 minute later 3 minutes later Ion concentration (ppm) 9.5 0.5 0.5

Example

[0115] (Example 3 and Comparative Example 2)

[0116] Using the test water 2 shown in Table 6, an adsorption test was performed, and the ion concentration with the passage of time was measured.

[0117] [Table 6]

[0118]

[0119] It can be seen from Example 3 that the adsorbent of the present invention also takes less than 3 minutes to reach adsorption equilibrium when the grafting rate is low. In contrast, in Comparative Example 2 using the zeolite-based adsorbent, it took more than 10 minutes to reach equilibrium.

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Abstract

The invention relates to coated particles, a process for production thereof, cation adsorbents, and water treatment system with the same. The coated particle of the invention are either particles obtained by surface-coating core resin particles with a surfacing resin having cation-adsorptive and -desorptive functional groups which are characterized in that the core resin particles are made of a thermoplastic resin and have a specific surface area of 50 to 6,000cm/cm and the quantity of the surfacing resin is 10 to 300wt% based on the core resin particles or particles obtained by surface-coating core resin particles with a surfacing resin having cation-adsorptive and -desorptive functional groups which are characterized in that the core resin particles are made of a thermoplastic resin and have nearly spherical shapes having diameters of 10 to 1,200[mu]m and the quantity of the surfacing resin is 10 to 300wt% based on the core resin particles. Thus, the invention provides cation adsorbents which exhibit high adsorption rates against cations such as ammonium ions or metal ions contained in raw water, high rates of regeneration of themselves, and high cation adsorbability as well as a small-sized water treatment system.

Description

technical field [0001] The present invention relates to coated fine particles having a cation exchange function usable for water treatment of well water, river water, etc., a method for producing the same, a cation adsorbent, and a water treatment system using the same. Background technique [0002] In recent years, in rivers and lakes, due to the increase in the inflow of industrial wastewater and domestic wastewater due to the increase in population, the content of nitrogen compounds such as ammonia has increased, and the quality of raw water for water supply has deteriorated. In addition, groundwater is also affected by long-term paddy field fertilizers or underground infiltration sewage treatment. In feed water that uses drawn water as raw water, the content of nitrogen oxides such as ammonia increases and changes over time. In order to supply such raw water as feed water, it is necessary to reduce the content of nitrogen compounds such as ammonia to below a reference va...

Claims

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Application Information

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IPC IPC(8): C08J3/12C02F1/42B01J39/20C08F291/00
CPCC08F261/04B01J20/327B01J20/26C08J3/126B01J20/3217B01J20/28057C08J2329/04B01J39/18B01J20/3293C02F2001/425C02F1/42B01J47/007B01J20/321B01J20/28019B01J20/28004B01J47/018
Inventor 奥村康之金子博实高桥邦彦菅野弦须佐宪三
Owner 图莱乐株式会社
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