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Document Type and Number:
WIPO Patent Application WO/2018/038394
Kind Code:
The present invention relates to a water treatment apparatus that has been made to solve the problem described above, the water treatment apparatus, according to the present invention, comprising: an adsorption reaction tank (110) which has an inlet part (111) provided thereto through which polluted water is introduced; a spray device (200) which sprays magnetite (Fe3O4) powder into the adsorption reaction tank (110) in order to adsorb phosphorus contained in the polluted water; a recovery tank (120) which has an outlet part (121) provided thereto, and which is connected to an end part of the adsorption reaction tank (110) so as to enable the polluted water containing magnetite (Fe3O4) to flow therein by passing through the adsorption reaction tank (110); and a washing tank (140) which removes the phosphorus from the magnetite (Fe3O4) recovered in the recovery tank (120) by using washing water. In this case, the water treatment apparatus, according to the present invention, uses, among iron oxides (Fe2O3, Fe3O4, FeO) which are by-products generated in steelmaking, magnetite (Fe3O4) exhibiting excellent phosphorus or heavy metal adsorption as an adsorbent, and thus the by-products may be recycled. Particularly, magnetite exhibits a strong magnetic force, and has excellent phosphorus adsorption capacity by having a monodentate and a bidentate formed with a phosphate ion on the particle surface thereof (see figure 1), and thus may effectively remove phosphorus from polluted water. The present invention is a water treatment apparatus whereby polluted water mixed with magnetite (Fe3O4) powder in the adsorption reaction tank (110) is introduced into the recovery tank (120) in which magnetite (Fe3O4) having phosphorus from the polluted water attached to the surface thereof is recovered, and the phosphorus-removed polluted water is discharged, and thus the present invention enables a shorter water treatment time and a higher phosphorus removal efficiency compared to conventionally-used phosphorus removal-type water treatment apparatuses.

KIM, Yun Jung (104-504, Songdo Seongji Ribelluse Apt. 7, Sinsong-ro 6beon-gil,Yeonsu-gu, Incheon, 21994, KR)
NAM, Hai Uk (901-1801, the sharp expo 77, Convensia-daero 42beon-gil,Yeonsu-gu, Incheon, 22001, KR)
CHOI, Young Kyun (102-2202, Taewang Legend Apt. 27, Uksucheon-ro,Suseong-gu, Daegu, 42282, KR)
Application Number:
Publication Date:
March 01, 2018
Filing Date:
July 14, 2017
Export Citation:
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POSCO ENGINEERING & CONSTRUCTION CO., LTD. (180 Daesong-ro, Nam-guPohang-si, Gyeongsangbuk-do, 37863, KR)
International Classes:
C02F1/28; B01J20/02; B03C1/14; C02F1/58; C05F17/00; C02F101/10
Foreign References:
Other References:
ZACH-MAOR, A. ET AL.: "Adsorption-desorption Mechanism of Phosphate by Immobilized Nano-sized Magnetite Layer: Interface and Bulk Interactions", JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol. 363, 27 July 2011 (2011-07-27), pages 608 - 614, XP028288417
Attorney, Agent or Firm:
B&IP-JOOWON PATENT AND LAW FIRM (9th Floor, Construction Center Eonju-ro 711,Gangnam-gu, Seoul, 06050, KR)
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