JP5700651B2 - 重金属類を含有する汚染水の処理剤および処理方法 - Google Patents
重金属類を含有する汚染水の処理剤および処理方法 Download PDFInfo
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- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
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- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
- C22B3/46—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
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- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/04—Obtaining arsenic
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/42—Materials comprising a mixture of inorganic materials
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/20—Heavy metals or heavy metal compounds
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
〈鉄粉〉
原料鉄粉として、水アトマイズ法で製造した硫黄含有量が1質量%の鉄粉(平均粒径:100μm)を使用した。
活性炭A:硫酸(47質量%)のみで処理した活性炭(硫酸の添着量:活性炭質量に対して硫酸8質量%)
活性炭B:硫酸(47質量%)およびリン酸(85質量%)で処理した活性炭(硫酸の添着量:活性炭量に対して硫酸5質量%、リン酸の添着量:活性炭質量に対して5質量%)
活性炭C:リン酸(85質量%)のみで処理した活性炭(リン酸の添着量:活性炭質量に対して15質量%)
重金属除去性能を判断するために、ヒ素の吸着性能による試験を実施した。まず、ヒ素含有排水のモデル液として、ヒ酸カリウム(KH2AsO4)をヒ素濃度で10.0mg/Lとなる様に蒸溜水に溶解させた被処理水を調製した。被処理水が250mL入った三角フラスコに、上記で調製した各配合処理剤を各々2.5g(1.0質量%)となるように添加し、室温で24時間振とうさせた。各配合処理剤を添加する前の汚染水のpHは5.33である。次で、振とうを止めて配合処理剤と上澄液を分離し、該上澄液中の残留ヒ素濃度をJIS K0102 61.3に則った水素化物としてICP発光分光分析法により測定した。
〈鉄粉〉
原料鉄粉として、水アトマイズ法で製造した硫黄含有量が1質量%の鉄粉(平均粒径:100μm)を使用した。
バインダーa:(株)ADEKA製、カチオン性の水溶性エポキシ樹脂[アデカレジン(登録商標)EM−0436F−3、固形分含有量:25.0%、pH:2〜4]
バインダーb:ユニチカ(株)製、カチオン性ポリエチレンエマルジョン樹脂[アローベース(登録商標)CB−1200、固形分含有量:23.0%、pH:2〜4]
バインダーc:ユニチカ(株)製、カチオン性ポリプロピレンエマルジョン樹脂[アローベース(登録商標)CY1−1100、固形分含有量:27.5%、pH:2〜4]
バインダーd:(株)ADEKA製、アニオン性の水溶性エポキシ樹脂[アデカレジン(登録商標)EM−0434−AN、固形分含有量:29.0%、pH:8〜10]
バインダーe:住友精化(株)製、アニオン製のポリオレフィン系エマルジョン樹脂[ザイクセン(登録商標)AC−HW−10、固形分含有量:30%、pH:8〜10]
バインダーf:ユニチカ(株)製、アニオン性ポリエチレンエマルジョン樹脂[アローベース(登録商標)SB−1200、固形分含有量:25.0%、pH:9〜11]
バインダーを用いた、鉄粉の造粒、または鉄粉と酸処理活性炭の混合物の造粒は、転動造粒方式により調製した。所定量のバインダーを、鉄粉または鉄粉と酸処理活性炭の混合物を転動させ回転させながら添加し、粒の成長を促していき、所定の粒度に達した後、造粒物に含んだ溶媒を鉄粉の酸化を防ぐために窒素雰囲気下で加熱および乾燥して揮発させ、造粒物を調製した。最終的に得られた造粒物を0.3mm〜1.4mmに、篩により分級した。
JIS K 1474に従って造粒物の強度を測定した。まず、篩分けした試料(造粒物)を、100mL採取した。直径:12.7mmまたは9.5mmの鋼球を、各々15個ずつと共に、硬さ試験用皿に入れ、篩振とう機に取り付け、30分振とうする。次で、粒度下限の篩の目開きの2段下の篩を用い、鋼球を除いた試料を全部入れる。篩振とう機にて3分振とうし、夫々の試料を計量する。篩に残った試料の質量割合(全体に対する質量%)を測定し、強度(硬度)の指標とした(この値が大きいほど、強度が高いことを示す)。
実施例2で示した配合処理剤(造粒物)のうち、試験No.19および20のものについて、ヒ素以外の重金属類の吸着性能試験を、下記の方法で行った。
ヒ素以外の重金属類として、セレン、鉛、カドミウムおよびクロムの吸着性能による試験を実施した。セレン、鉛、カドミウムおよびクロムの各々の含有排水のモデル液として、セレン酸ナトリウム(Na2SeO4)、硝酸鉛(II)(Pb(NO3)2)、塩化カドニウム2.5水和物(CdCl2・2.5H2O)、二クロム酸カリウム(K2Cr2O7)を、夫々用い、各々の重金属濃度で、1.0mg/Lとなる様に蒸溜水に溶解させた被処理水を調製した。250mLの被処理水が入った三角フラスコに、強度およびヒ素吸着性能の良かった試験No.19および20(表3)で調製した造粒物を、2.5g(1.0質量%)となるように添加し、室温で72時間振とうさせた。次いで、振とうを止めて配合処理剤(造粒物)と上澄液を分離し、該上澄液中の残留重金属濃度を測定した。このときセレンは、JIS K0102 67.3に則った水素化物ICP発光分光分析法、鉛はJIS K0102 54.4に則ったICP質量分析法、カドミウムはJIS K0102 55.4に則ったICP質量分析法、クロムはJIS K0102 65.1.5に則ったICP質量分析法により、各々の重金属濃度を測定した。その結果を下記表4に示すが、本発明の処理剤は、ヒ素以外の重金属類に対する吸着結果も優れていることが分かる。
Claims (8)
- ヒ素、セレン、鉛、カドミウムおよびクロムの重金属類の少なくとも1種を含有する汚染水から前記重金属類を除去するための処理剤であって、硫黄を含有する鉄粉に、汚染水のpHを7未満に低下させる化合物として、酸で処理した吸着剤を配合したものであることを特徴とする処理剤。
- 硫黄を含有する鉄粉と、この鉄粉に配合され且つ酸で処理された吸着剤とで構成されることを特徴とする処理剤。
- 酸で処理した吸着剤が、少なくとも硫酸を含む無機酸で処理した活性炭である請求項1または2に記載の処理剤。
- 鉄粉中の硫黄の含有量は0.6〜5質量%である請求項1〜3のいずれかに記載の処理剤。
- 鉄粉はアトマイズ法によって製造されたものである請求項1〜4のいずれかに記載の処理剤。
- バインダーを介して造粒物の形態としたものである請求項1〜5のいずれかに記載の処理剤。
- 前記バインダーは、カチオン性の水溶性樹脂またはカチオン性のエマルジョン型樹脂である請求項6に記載の処理剤。
- ヒ素、セレン、鉛、カドミウムおよびクロムの重金属類の少なくとも1種を含む汚染水と、請求項1〜7のいずれかに記載の処理剤とを接触させることを特徴とする汚染水の処理方法。
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JP2011033598A JP5700651B2 (ja) | 2010-04-21 | 2011-02-18 | 重金属類を含有する汚染水の処理剤および処理方法 |
PCT/JP2011/059726 WO2011132705A1 (ja) | 2010-04-21 | 2011-04-20 | 重金属類を含有する汚染水の処理剤および処理方法 |
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JP6118571B2 (ja) * | 2012-02-07 | 2017-04-19 | 株式会社神戸製鋼所 | 汚染土壌の処理方法 |
EP2846897A4 (en) | 2012-05-07 | 2016-03-16 | Biogenic Reagent Ventures Llc | BIOGENIC ACTIVE CARBON AND METHOD FOR THE PRODUCTION AND USE THEREOF |
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JP2024512242A (ja) | 2021-02-18 | 2024-03-19 | カーボン テクノロジー ホールディングス, エルエルシー | カーボンネガティブ冶金製品 |
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JP4433173B2 (ja) * | 2003-06-10 | 2010-03-17 | 戸田工業株式会社 | 土壌・地下水の浄化処理用鉄複合粒子粉末、その製造法、当該鉄複合粒子粉末を含む浄化剤、その製造法及び土壌・地下水の浄化処理方法 |
JP2005137973A (ja) * | 2003-11-04 | 2005-06-02 | Futaba Shoji Kk | 磁性吸着剤およびその製造方法並びに水処理方法 |
JP4676898B2 (ja) * | 2005-04-07 | 2011-04-27 | 株式会社神戸製鋼所 | 汚染水中のヒ素除去法およびヒ素除去処理剤 |
JP4681384B2 (ja) * | 2005-07-28 | 2011-05-11 | 株式会社アステック | 砒素吸着剤の製造方法及び砒素吸着剤 |
JP4963984B2 (ja) * | 2007-02-23 | 2012-06-27 | 株式会社神戸製鋼所 | 汚染水中のヒ素除去法およびそれに用いる処理剤 |
JP4755159B2 (ja) * | 2007-09-28 | 2011-08-24 | 株式会社神戸製鋼所 | 重金属類を含有する汚染水の処理剤および処理方法 |
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