JP5429740B2 - コケ植物の原糸体を用いた金属の回収方法 - Google Patents
コケ植物の原糸体を用いた金属の回収方法 Download PDFInfo
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- JP5429740B2 JP5429740B2 JP2009132208A JP2009132208A JP5429740B2 JP 5429740 B2 JP5429740 B2 JP 5429740B2 JP 2009132208 A JP2009132208 A JP 2009132208A JP 2009132208 A JP2009132208 A JP 2009132208A JP 5429740 B2 JP5429740 B2 JP 5429740B2
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Classifications
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- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
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- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
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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
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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Description
(1) 銀よりイオン化傾向が低い金属を回収する方法であって、ヒョウタンゴケ科に属するコケ植物由来の原糸体を前記金属が溶解した溶液と接触させることを含む、前記方法。
(2) 前記コケ植物の原糸体は、ヒョウタンゴケ属(Funaria)、ツリガネゴケ属(Physcomitrium)及びヒメヒョウタンゴケ属(Entosthodon)からなる群より選択された1種以上のコケ植物由来であることを特徴とする、上記(1)に記載の方法。
(3) 前記コケ植物の原糸体は、ヒョウタンゴケ属(Funaria)に属する1種以上のコケ植物由来であることを特徴とする、上記(1)に記載の方法。
(4) 前記コケ植物の原糸体はヒョウタンゴケ(Funaria hygrometrica Hedw.)由来であることを特徴とする、上記(1)に記載の方法。
(5) 銀よりイオン化傾向が低い金属は、金及び/又は白金である、上記(1)に記載の方法。
(6) 前記金属が溶解した溶液はpH 1.0〜12.0である、上記(1)に記載の方法。
(7) 前記コケ植物の原糸体は、原糸体乾燥重量の10%以上の金最大蓄積能を有することを特徴とする、上記(1)に記載の方法。
(8) 前記コケ植物の原糸体は、原糸体乾燥重量の4%以上の白金最大蓄積能を有することを特徴とする、上記(1)に記載の方法。
(9) 上記(1)〜(8)のいずれかに記載の方法で使用した、銀よりイオン化傾向が低い少なくとも1種の金属を蓄積したコケ植物原糸体。
(10) 前記金属は金及び/又は白金である、上記(9)に記載のコケ植物原糸体。
(11) 赤色〜赤紫色を呈している、上記(9)に記載のコケ植物原糸体。
ヒョウタンゴケ(Funaria hygrometrica Hedw.)について、野外より採集した本種の胞子体から胞子を播種し、単一胞子由来の原糸体を単離した。簡単に説明すると、まず成熟時期の胞子体を準備し、胞子体の柄をピンセットでつまみ、2.5%次亜塩素酸ナトリウム溶液に60秒間ひたし、その後、0.1%塩化ベンザルコニウム溶液に30秒間ひたした。次に、滅菌水(蒸留水を121℃、20分間オートクレーブ処理した水)に30秒間ひたした後、滅菌されたピンセットで胞子体の蓋を開けた。このようにして開口させた胞子体を寒天培地上でゆすることで、寒天培地上へ胞子を散布・播種した。胞子を播種した寒天培地を培養棚に設置し、20日後にクリーンベンチ内で単一胞子由来の原糸体を滅菌したピンセットで拾い取り、新たな寒天培地上に植え継ぎ14日間培養させ繁茂した原糸体を、培養液1mlを入れた1.5ml容のマイクロチューブ中に入れた。この溶液をマイクロチューブペッスルで軽く懸濁させた懸濁液を再度、寒天培地上へ播種することで、単一胞子由来の原糸体株を維持した。その後、上記のようにして単離した原糸体を液体通気(回分)培養法により培養した。培養期間は14日間(光条件、明:暗=16:8、温度条件、20℃)若しくは30日間(光条件、連続明、温度条件、20℃)に設定し、培養後に得られた原糸体混合溶液をポリトロンホモジナイザー(PT2100 KINEMATICA)で破砕し得られる原糸体懸濁液1mLを新たな培養液に加えることで、継続的に管理した。培養液の組成は10mM KNO3(硝酸カリウム)、1mM MgSO4(硫酸マグネシウム)、2mM KH2PO4(第一リン酸カリウム)、45μM FeSO4(硫酸鉄)、1.6μM MnSO4(硫酸マンガン)、10μM H3BO3(ホウ酸)、0.2μM ZnSO4(硫酸亜鉛)、0.2μM KI(ヨウ化カリウム)、0.1μM Na2MoO4(モリブデン酸ナトリウム)、0.2μM CuSO4(硫酸銅)、0.2μM CoCl2(塩化コバルト)、5mM (NH4)2C4H4O6(酒石酸アンモニウム)、1mM CaCl2とし、650mLの扁平培養瓶(液体通気培養法)あたり500mLの培養液を入れた。
上記の液体通気培養法により、原糸体はそれぞれ290倍程度に増殖した(乾燥重量1.2mgから348.9mg回収)。
上記実施例1で得たヒョウタンゴケ(Funaria hygrometrica Hedw.)の原糸体混合溶液10mLを5mL容の性能試験カラムに濃縮充填し(以下、Fhカラムという)、各種金属含有溶液をペリスタポンプ(ATTO SJ-1211)を用いてFhカラムに5mL/24分の流速で添加した。
本試験では、金属含有溶液として、金濃度50ppmの塩化金(AuCl)溶液(塩酸pH 3.0)及び塩化金酸(HAuCl4)溶液(pH 1.5)を用いた。これら金属含有溶液を流す以前にカラムを安定させるために超純水を18時間流し、浄化試験後に植物体中に付着した金属を洗うために超純水を8時間流す操作を行い、次の通り、コケ植物に回収された金属の分析を行った。
本試験では、金属含有溶液として金リサイクル工場廃液を用いた。この廃液は、金リサイクル工場で用いるめっき剥離液からの金回収プロセスで回収しきれなくなった金濃度が1μg/L未満の金含有排液シアン化カリウム、シアン化ナトリウムをベースとした廃液であり、濃黄色のアルカリ溶液(pH10.0)であった。
Claims (11)
- 銀よりイオン化傾向が低い金属を回収する方法であって、ヒョウタンゴケ科に属するコケ植物由来の原糸体を前記金属が溶解した溶液と接触させることを含む、前記方法。
- 前記コケ植物の原糸体は、ヒョウタンゴケ属(Funaria)、ツリガネゴケ属(Physcomitrium)及びヒメヒョウタンゴケ属(Entosthodon)からなる群より選択された1種以上のコケ植物由来であることを特徴とする、請求項1に記載の方法。
- 前記コケ植物の原糸体は、ヒョウタンゴケ属(Funaria)に属する1種以上のコケ植物由来であることを特徴とする、請求項1に記載の方法。
- 前記コケ植物の原糸体はヒョウタンゴケ(Funaria hygrometrica Hedw.)由来であることを特徴とする、請求項1に記載の方法。
- 銀よりイオン化傾向が低い金属は、金及び/又は白金である、請求項1に記載の方法。
- 前記金属が溶解した溶液はpH 1.0〜12.0である、請求項1に記載の方法。
- 前記コケ植物の原糸体は、原糸体乾燥重量の10%以上の金最大蓄積能を有することを特徴とする、請求項1に記載の方法。
- 前記コケ植物の原糸体は、原糸体乾燥重量の4%以上の白金最大蓄積能を有することを特徴とする、請求項1に記載の方法。
- 請求項1〜8のいずれか1項に記載の方法で使用した、銀よりイオン化傾向が低い少なくとも1種の金属を蓄積したコケ植物原糸体。
- 前記金属は金及び/又は白金である、請求項9に記載のコケ植物原糸体。
- 赤色〜赤紫色を呈している、請求項9に記載のコケ植物原糸体。
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JP2009132208A JP5429740B2 (ja) | 2009-06-01 | 2009-06-01 | コケ植物の原糸体を用いた金属の回収方法 |
CN201080024165.2A CN102449175B (zh) | 2009-06-01 | 2010-06-01 | 使用苔藓植物的原丝体的金属回收方法 |
EP10783483.0A EP2439292B1 (en) | 2009-06-01 | 2010-06-01 | A metal recovery method using protonemata of moss plants |
US13/375,341 US8888891B2 (en) | 2009-06-01 | 2010-06-01 | Metal recovery method using protonemata of moss plants |
PCT/JP2010/059584 WO2010140701A1 (ja) | 2009-06-01 | 2010-06-01 | コケ植物の原糸体を用いた金属の回収方法 |
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