JP2021000584A - 鉄を主成分とする水の浄化材及びその製造方法 - Google Patents
鉄を主成分とする水の浄化材及びその製造方法 Download PDFInfo
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- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- B01J2220/48—Sorbents characterised by the starting material used for their preparation
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- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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Abstract
Description
〔1〕重量比で全鉄が30〜40%、チタンが1〜5%、マグネシウムが0.1〜1%、シリカ(珪素)が0.1〜0.8 %の組成を有する水の浄化材。
〔2〕2価の鉄を200mg/L〜100mg/L、チタンイオンを20mg/L〜100mg/L、マグネシウムを5mg〜50mg/L、シリカを3mg/L〜30mg/L含んでいる溶液に、30℃〜50℃、pH6.8〜pH7.2の条件下で苛性ソーダを添加して中和・反応させ、得られた固形物を、100℃以下で分離回収し、回収された固形物を乾燥する、ことを含む水の浄化材の製造方法。
〔3〕前記溶液が、ポリ硫酸第二鉄の製造工程より排出される廃液と鉄鋼関係の酸洗工程より排出される廃液を配合して調製したものである〔2〕記載の水の浄化材の製造方法。
〔4〕前記溶液中の鉄が、硫酸第二鉄(Fe+2)、又は硫酸第二鉄(Fe+2)及び硫酸第一鉄(Fe+3)の混合物である〔2〕又は〔3〕記載の水の浄化材の製造方法。
添加手段は、溶液中に苛性ソーダ水溶液を少量ずつ添加混合可能なものであれば、公知の手段を利用できる。例えば、攪拌手段を備えた反応槽内にて行えばよい。
本発明の浄化材は、以下のように調製した。
(1)ポリ硫酸第二鉄の製造工程より排出する廃液0.01m3と鉄鋼関係の酸洗工程より排出する廃液1m3を混合する。
この混合液のpHは2.5であり温度は40℃であった。
(2)この混合液を苛性ソーダでpH6.8になるよう中和する。
(3)得られた固形物を、加圧ろ過装置を使用して回収する。
(4)分離した固形物を温風装置で乾燥した。
このようにして得られた固形物は、粉末状であり、その組成は、重量比で全鉄が30〜40%、チタンが1〜5%、マグネシウムが0.1〜1%、シリカ(珪素)が0.1〜0.8 %であった。
従来品としては、市販の浄化材の主成分である水酸化鉄(以下「従来品」という。)を使用した。
また、実験に使用するリン含有廃液としてはリン酸二水素カリウムを溶解したものを濃度50mg/Lのリン酸溶液となるように調整した液を試料として用いた。
その結果を図1に示す。
結果を図2に示す。アンモニアの吸着量は、本発明品が4.00mg/g、従来品が3.20mg/gとなり、本発明品の方が吸着能に優れていることが判った。廃水中のアンモニア濃度は、本発明品のほうが低下するが早かった。
結果を図3に示す。亜硝酸イオンの吸着量は、本発明品が4.00mg/g、従来品が3.00mg/gとなり、本発明品の方が吸着能に優れていることが判った。
亜硝酸濃度が半分になるまで、本発明品が7日目であったのに対し、従来品は10日後であった。以降も亜硝酸濃度は徐々に減り、本発明品は10日後10mg/g、従来品は11日後に20mg/gまで減り、以後横ばいとなった。
結果を図4に示す。硝酸イオンの吸着量は、本発明品が3.50mg/g、従来品が2.50mg/gとなり、本発明品の方が吸着能に優れていることが判った。
硝酸濃度が半分になるまで、本発明品が9日目であったのに対し、従来品は14日後であった。以降も硝酸濃度は徐々に減り、本発明品は14日後15mg/g、従来品は14日後に25mg/gまで減り、以後横ばいとなった。
各水槽は、床砂用砂利「ソイル」(商品名)を1.5リットル床砂として使用、水草を置いた中で、ネオンテトラ10匹を飼育した。
図5は、実施例1で使用した本発明品と従来品を使用して、熱帯魚の飼育水槽内の飼育水を浄化したときに、水槽のガラス面にアオモ発生する様子を撮影した写真である。
従来品では、20日目にアオモの付着が観察されたが、本発明品では30日後になって薄くアオモの付着が観察された。
Claims (4)
- 全鉄が30〜40%、チタンが1〜5%、マグネシウムが0.1〜1%、シリカ(珪素)が0.1〜0.8%の組成を有する水の浄化材。
- 2価の鉄を200mg/L〜100mg/L、チタンイオンを20mg/L〜100mg/L、マグネシウムを5mg〜50mg/L、シリカを3mg/L〜30mg/L含んでいる溶液に、30℃〜50℃、pH6.8〜pH7.2の条件下で苛性ソーダを添加して中和・反応させ、得られた固形物を、100℃以下で分離回収し、回収された固形物を乾燥する、ことを含む水の浄化材の製造方法。
- 前記溶液が、ポリ硫酸第二鉄の製造工程より排出される廃液と鉄鋼関係の酸洗工程より排出される廃液を配合して調製したものである請求項2記載の水の浄化材の製造方法。
- 前記溶液中の鉄が、硫酸第二鉄(Fe+2)、又は硫酸第二鉄(Fe+2)及び硫酸第一鉄(Fe+3)の混合物である請求項2又は3記載の水の浄化材の製造方法。
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JP2019114385A JP7236143B2 (ja) | 2019-06-20 | 2019-06-20 | 鉄を主成分とする水の浄化材及びその製造方法 |
PCT/JP2020/023586 WO2020255956A1 (ja) | 2019-06-20 | 2020-06-16 | 鉄を主成分とする水の浄化材及びその製造方法 |
CN202080044829.5A CN114364639A (zh) | 2019-06-20 | 2020-06-16 | 具有铁作为主组分的水净化材料及其制造方法 |
AU2020297138A AU2020297138A1 (en) | 2019-06-20 | 2020-06-16 | Water purifying material having iron as main component, and method for manufacturing same |
US17/619,848 US12121874B2 (en) | 2019-06-20 | 2020-06-16 | Water purifying material having iron as main component, and method for manufacturing same |
EP20827346.6A EP3988202B1 (en) | 2019-06-20 | 2020-06-16 | Method of manufacturing a water purifying material |
CA3142066A CA3142066A1 (en) | 2019-06-20 | 2020-06-16 | Water purifying material having iron as main component, and method for manufacturing same |
TW109120814A TWI769468B (zh) | 2019-06-20 | 2020-06-19 | 以鐵為主成分之水的淨化材及其製造方法 |
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AU (1) | AU2020297138A1 (ja) |
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JP2000342960A (ja) * | 1999-06-08 | 2000-12-12 | Nikko Co | 脱燐剤及びその製造方法 |
BR0114166B1 (pt) * | 2000-09-26 | 2014-10-14 | Lanxess Deutschland Gmbh | Unidades susceptíveis ao escoamento de meios e uso das mesmas |
JP2005118614A (ja) * | 2003-10-14 | 2005-05-12 | Akita Prefecture | リン酸イオン回収材及びその製造方法並びにリン酸イオンの回収方法 |
JP3852844B2 (ja) | 2003-11-14 | 2006-12-06 | 株式会社セイスイ | 汚泥分解・水質浄化剤及び浄化方法 |
JP2006110470A (ja) | 2004-10-14 | 2006-04-27 | Ueda Shikimono Kojo:Kk | 水質浄化剤 |
JP4012975B2 (ja) * | 2004-10-29 | 2007-11-28 | 独立行政法人科学技術振興機構 | オキシ水酸化鉄の製造方法及びオキシ水酸化鉄吸着材 |
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CN101450856B (zh) * | 2007-12-03 | 2011-09-07 | 北京有色金属研究总院 | 一种氧化物陶瓷滤料及其制备方法 |
WO2010140968A1 (en) * | 2009-06-05 | 2010-12-09 | Kenrex Envirotech | Use of a composition for conditioning wastewater, and system, material and method for recycling wastewater components |
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WO2019070574A1 (en) * | 2017-10-02 | 2019-04-11 | Phosphorus Free Water Solutions, Llc | ELIMINATION OF PHOSPHORUS PRESENT IN WATER |
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Patent Citations (4)
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JPH07214081A (ja) * | 1994-01-28 | 1995-08-15 | Nippon Shokubai Co Ltd | 水産生物飼育水の浄化方法 |
JP2005087833A (ja) * | 2003-09-16 | 2005-04-07 | Nippon Steel Chem Co Ltd | 水質浄化材及びその製造方法 |
JP2005087834A (ja) * | 2003-09-16 | 2005-04-07 | Nippon Steel Chem Co Ltd | 水質浄化材及びその製造方法 |
JP2005144420A (ja) * | 2003-11-13 | 2005-06-09 | Unylec:Kk | 水浄化剤 |
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EP3988202A1 (en) | 2022-04-27 |
TW202108237A (zh) | 2021-03-01 |
US20220347649A1 (en) | 2022-11-03 |
JP7236143B2 (ja) | 2023-03-09 |
WO2020255956A1 (ja) | 2020-12-24 |
EP3988202A4 (en) | 2023-05-03 |
CA3142066A1 (en) | 2020-12-24 |
EP3988202B1 (en) | 2024-09-11 |
CN114364639A (zh) | 2022-04-15 |
AU2020297138A1 (en) | 2022-02-03 |
TWI769468B (zh) | 2022-07-01 |
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