METHOD FOR REMOVING HARMFUL SUBSTANCE IN AQUEOUS SOLUTION

• Main Authors: OTANI TOSHIYUKI, AOKI SHIGEYUKI, XIE XIAOMAO, ONISHI TOKUYUKI, HATA HIDEYUKI, HANADA KAZUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 24.09.2015
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DECONTAMINATION ARRANGEMENTS THEREFOR; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To provide a water treatment method capable of removing harmful substances such as semimetals, heavy metals, and radioactive substances from an aqueous solution including a large amount of impurity ions, in a simple, rapid and efficient manner.SOLUTION: The method for removing harmful substances in an aqueous solution includes: adding magnetic particles 1 as seed particles to an aqueous solution 5 which contains ions 2 of harmful substance; preparing a magnetic composite 7 to which the ions 2 of harmful substance are adsorbed using a water-soluble iron salt in the aqueous solution; and removing the magnetic composite 7 by at least one method selected from magnetic separation 6 and filtration. 【課題】夾雑物イオンを多く含む水溶液であっても、半金属・重金属類や放射性物質等の有害物質を簡便かつ迅速に、しかも効率的に除去することの可能な水処理方法を提供する。【解決手段】有害物質イオン２を含む水溶液５中に種粒子としての磁性粒子１を添加し、前記水溶液中で水溶性鉄塩を用いて有害物質イオン２が吸着した磁性複合体７を調製し、磁性複合体７を磁気分離６及び濾過から選択される少なくとも一つの方法で除去することにより、水溶液中の有害物質の除去する方法。【選択図】図２