JP2011036744A - 植物への重金属吸収促進剤および土壌の浄化方法 - Google Patents
植物への重金属吸収促進剤および土壌の浄化方法 Download PDFInfo
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Abstract
【解決手段】アルギン酸もしくはその塩またはそれらの分解物を含有してなり、重金属含有土壌に添加するための、植物への重金属吸収促進剤。
【選択図】なし
Description
(1)アルギン酸、その塩もしくはエステルまたはそれらの分解物を含有してなり、重金属含有土壌に添加するための、植物への重金属吸収促進剤;
(2)塩がアルギン酸ナトリウム、アルギン酸カリウム、アルギン酸マグネシウム、アルギン酸カルシウムまたはアルギン酸アンモニウムである上記(1)に記載の植物への重金属吸収促進剤;
(3)分解物が、微生物が産生したアルギン酸分解酵素を作用させる方法、これらの微生物等を用いる方法、酸を用いて分解する方法または放射線を照射する方法で得られる上記(1)または(2)に記載の植物への重金属吸収促進剤;
(4)植物が、アブラナ科、アオイ科、マメ科、アカザ科、ナス科、キク科、タデ科、 およびイネ科からなる群から選ばれる少なくとも1種の植物である上記(1)〜(3)のいずれかに記載の植物への重金属吸収促進剤;
(5)重金属が、カドミウム、亜鉛、鉛、クロム、銅、水銀、ヒ素、スズおよびセレンならびにそれらの金属化合物の一種以上であることを特徴とする上記(1)〜(4)のいずれかに記載の植物への重金属吸収促進剤;
(6)上記(1)〜(5)のいずれかに記載の、植物への重金属吸収促進剤を用いて土壌中の重金属の植物への吸収を促進させて、重金属を含む土壌を浄化する方法;
(7)重金属を含む土壌に重金属吸収促進剤を添加し、該土壌で植物を生育させる上記(6)に記載の方法;
(8)土壌中の重金属含有量が0.5%以下である(6)または(7)に記載の方法;
(9)重金属吸収促進剤が、アルギン酸、その塩もしくはエステルまたはそれらの分解物の量として、土壌1m2あたり、1〜2,000g用いられる上記(6)〜(8)のいずれかに記載の方法、
である。
乾燥質量は、アルギン酸アンモニウム無添加区が約0.03gであったのに対し、10mg添加区が約0.05gの最高値を示した。一方、カドミウム含有量は、アルギン酸アンモニウム無添加区が約0.9μg/ポットであったのに対し、10mg添加区が約1.5μg/ポットの最高値を示した。
乾燥質量は、アルギン酸アンモニウム無添加区が約0.06gであったのに対し、5mg添加区が約0.12gの最高値を示した。一方、カドミウム含有量は、アルギン酸アンモニウム無添加区が約3.2μg/ポットであったのに対し、5mg添加区が約6.9μg/ポットの最高値を示した。
無添加区 約1.7g/ポット;1.88g添加区 約2.1g/ポット;7.52g添加区 約2.3g/ポット
(Cd吸収量)
無添加区 約0.19μg/ポット;1.88g添加区 約3.2μg/ポット;7.52g添加区 約3.5μg/ポット
Claims (9)
- アルギン酸、その塩もしくはエステルまたはそれらの分解物を含有してなり、重金属含有土壌に添加するための、植物への重金属吸収促進剤。
- 塩がアルギン酸ナトリウム、アルギン酸カリウム、アルギン酸マグネシウム、アルギン酸カルシウムまたはアルギン酸アンモニウムである請求項1に記載の植物への重金属吸収促進剤。
- 分解物が、微生物が産生したアルギン酸分解酵素を作用させる方法、これらの微生物等を用いる方法、酸を用いて分解する方法または放射線を照射する方法で得られる請求項1または2に記載の植物への重金属吸収促進剤。
- 植物が、アブラナ科、アオイ科、マメ科、アカザ科、ナス科、キク科、タデ科、およ
びイネ科からなる群から選ばれる少なくとも1種の植物である請求項1〜3のいずれ
かに記載の植物への重金属吸収促進剤。 - 重金属が、カドミウム、亜鉛、鉛、クロム、銅、水銀、ヒ素、スズおよびセレンならびにそれらの金属化合物の一種以上であることを特徴とする請求項1〜4のいずれかに記載の植物への重金属吸収促進剤。
- 請求項1〜5のいずれかに記載の、植物への重金属吸収促進剤を用いて土壌中の重金属の植物への吸収を促進させて、重金属を含む土壌を浄化する方法。
- 重金属を含む土壌に重金属吸収促進剤を添加し、該土壌で植物を生育させる請求項6に記載の方法。
- 土壌中の重金属含有量が0.5%以下である請求項6または7に記載の方法。
- 重金属吸収促進剤が、アルギン酸、その塩もしくはエステルまたはそれらの分解物の量として、土壌1m2あたり、1〜2,000g用いられる請求項6〜8のいずれかに記載の方法。
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