JP2004181336A - Composition for capturing environmental hormone - Google Patents

Composition for capturing environmental hormone Download PDF

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Publication number
JP2004181336A
JP2004181336A JP2002350676A JP2002350676A JP2004181336A JP 2004181336 A JP2004181336 A JP 2004181336A JP 2002350676 A JP2002350676 A JP 2002350676A JP 2002350676 A JP2002350676 A JP 2002350676A JP 2004181336 A JP2004181336 A JP 2004181336A
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Japan
Prior art keywords
plum
composition
charcoal
capturing
environmental hormones
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JP2002350676A
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Japanese (ja)
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Hirotoshi Utsunomiya
洋才 宇都宮
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JOGAN KK
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JOGAN KK
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique capable of preventing the pollution caused by environmental hormone in daily living environment by utilizing an adsorability possessed by carbonized products of an Ume (a Japanese plum) seed and its activation products. <P>SOLUTION: This composition for capturing the environmental hormone contains the carbonized product powder obtained by dry-distillating the Ume seed at about ≤1,150 °C, or further by activating them as an effective component. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は内分泌かく乱化学物質(以下、本明細書においては環境ホルモンという)捕捉用の組成物に関し、詳細には、活性炭のうち、特に梅種子の炭化物またはその賦活物を有効成分として含み、排水や大気など生活環境に存在する環境ホルモン該当物質を吸着除去して無害化することのできる捕捉用組成物に関するものである。
【0002】
【従来の技術】
環境ホルモンは、生物の体内に摂取されると内分泌系を乱し、健康障害や生殖障害など生態系に悪影響を及ぼすことが確認されており、最近では人類に与える影響も強く叫ばれている。
【0003】
環境ホルモンには、樹脂素材、界面活性剤、可塑剤、農薬あるいはそれらの原材料として工業的に生産され、使用されているものや、薬剤製造工場や焼却設備などで副生するもの等があり、用・排水、河川・湖沼、海水、地下水、土壌などに広く分布していることが確認されるに及び、大きな社会問題となっている。
【0004】
この様な環境ホルモンの代表例としては、ダイオキシン類やポリ塩化ビフェニール(PCB)などが挙げられ、これらは水環境においてppb〜pptオーダーの極微量でも女性ホルモンや男性ホルモンに影響を及ぼすといわれている。
【0005】
そこで、これら環境ホルモン汚染水を浄化する方法として、生物分解法、オゾンや過酸化水素などを用いた酸化分解法などが提案されているが、コストや処理効率を考えると実用に即した処理法とは言い難い。
【0006】
特許文献1には、環境ホルモン含有水を多孔質の炭素質材料(粉末活性炭や粒状活性炭)で吸着除去する方法が開示され、また特許文献2には、環境ホルモン汚染水を、鉄、炭素、珪素、Al、Mn、P、Caなどの元素や化合物の存在下で、活性炭、活性コークス、シリカ、アルミナ、ゼオライト、イオン交換樹脂などの吸着性担体と接触させる方法が開示されており、これらの方法によれば、ある程度の環境ホルモン除去効果を得ることができる。
【0007】
しかしこれらの方法は、汚染水専用の浄化法としてそれなりの効果が期待されるものの、大規模な設備を必要とするため、日常的な生活環境の中で手ごろな手段で身近なところから環境ホルモンを除去するといったことは期待できない。
【0008】
他方、活性炭が様々の有害物質に対して優れた吸着除去作用を有していることは古くから知られており、こうした作用を利用し、有害物除去剤、脱臭剤、除湿剤などとして広く実用化されている。
【0009】
ところで、梅干や梅シロップ、梅ジュースなどの梅肉食品を製造する際に大量に排出される梅の種子は、殆どが産業廃棄物として投棄され或いは焼却処分されていたが、最近、梅の種子を加熱乾留して炭化し、或いは更に賦活化したものは優れた吸着能を有することが確認される(特許文献3など)に及び、該炭化物を固形燃料や除湿剤、脱臭剤、肥料などとして有効利用する技術が幾つか提案されている(特許文献4,5など)。
【0010】
【特許文献1】
特開2000−140834号公報
【特許文献2】
特開2002−254071号公報
【特許文献3】
特開平5−212279号公報
【特許文献4】
特開2000−225386号公報
【特許文献5】
特開2001−106517号公報
【0011】
【発明が解決しようとする課題】
本発明者らも、梅種子の炭化物を産業資材として有効利用すべくかねてより研究を進めているが、今回は特に、該炭化物やその賦活物が有している吸着活性の応用に焦点を絞って、日常的な生活環境の中で環境汚染防止に役立てることのできる技術の開発を期して研究を重ねてきた。従って本発明の目的は、梅種子の炭化物やその賦活物が有する吸着性能を活用し、日常的な生活環境の中で環境汚染を効果的に防止乃至抑制し得るような技術を提供することにある。
【0012】
【課題を解決するための手段】
上記課題を解決することのできた本発明に係る環境ホルモン捕捉用組成物とは、梅種子の炭化物またはその賦活物を有効成分として含有するところに特徴を有している。
【0013】
本発明においては、上記炭化物またはその賦活物を、平均粒径20μm以下の微粉末として含むものが特に好ましく、また該炭化物は、梅種子を1150℃程度以下、より好ましくは1100℃程度以下の温度域で加熱乾留して炭化し、あるいは更に、水蒸気や炭酸ガスなどを用いて賦活化したものが特に好ましい。
【0014】
そして、本発明に係る上記組成物の利用形態としては、上記粉末をパルプと複合したもの、石鹸素材と複合しせたもの、熱可塑性樹脂と複合したもの等が例示され、より具体的には、各種紙材に含有させて壁紙、ダンボールの如き紙製包装材料、トイレットペーパーやキッチンペーパー、ティッシュなどとしての使用形態;液状もしくは固形状の石鹸素材に混入した洗剤としての使用形態;合成繊維素材中に練りこみ、或いは天然繊維素材に付着させ各種繊維製品として利用する形態などが例示され、これらにより、身近な生活環境の中で用いる素材に環境ホルモン捕捉機能を持たせることができる。
【0015】
【発明の実施の形態および実施例】
本発明者らは前述したような課題の下で、梅種子炭化物やその賦活物の吸着能を活かした応用分野と有用性の一層の拡大を目指し、様々の有機物質に対する吸着活性について、最近注目されている備長炭や竹炭などに対する優位性を定量的に調べた。その結果、梅種子の炭化物やその賦活物は、特に平均粒径で20μm以下、より好ましくは10μm程度以下に粉砕した微粉末として使用することにより、様々の環境ホルモン物質に対する吸着捕捉作用において特異的に優れた効果を有することを突き止め、上記本発明に想到した。
【0016】
梅種子の炭化物またはその賦活物が、様々の環境ホルモン物質捕捉用として特異的に優れた性能を発揮する理由は必ずしも明確にされたわけではないが、次の様に考えられる。
【0017】
即ち、追って詳述する如く該梅種子炭化物は、備長炭や竹炭に比べて細孔の形状が多種多様で且つ細孔径も様々で細孔径分布が非常に広く、これが様々の環境ホルモン物質に対して万遍なく優れた吸着作用を発揮するためと考えている。
【0018】
ちなみに本発明で捕捉対象となる環境ホルモン物質としては、代表的なダイオキシンやポリ塩化ビフェニール(PCB)等が注目されているが、これら以外にも、例えばポリ臭化ビフェニール(PBB)類、ヘキサクロロベンゼン(HCB)、ペンタクロロフェノール(PCP)、2,4,5−ジクロロフェノキシ酢酸、アミトロール、アトラジン、アラクロール、ヘキサクロロシクロヘキサン、エチルパラチオン、カルバリル、クロルデン、オキシクロルデン、1,2−ジブロモ−3−クロロプロパン、DDT、DDE、DDD、アルドリン、エンドリン、ティルドリン、ヘプタクロロエポキサイド、エストロゲン、マラチオン、ニトロフェン、トキサフェン、トリブチルスズ、トリフェニルスズ、トリフルラリン、ノニルフェノール、4−オクチルフェノール、ビスフェノールA、フタル酸ジエチルヘキシル、フタル酸ブチルベンジル、フタル酸ジ−n−ブチル、フタル酸ジシクロヘキシル、フタル酸ジエチル、2,4−ジクロロフェノール、アジピン酸ジ−2−エチルヘキシル、ベンゾフェノン、4−ニトロトルエン、オクタクロロスチレン、アルディカーブ、ジペルメトリン、ペルメトリン、ピンクロゾリン、フタル酸ジペンチル、フタル酸ジヘキシル、フタル酸ジプロピル、スチレンの2,3量体、n−ブチルベンゼンなどが挙げられ、分子量や活性炭に対する吸着力も様々である。
【0019】
他方、備長炭や竹炭などに由来する活性炭は、吸着サイトとなる細孔の形や寸法が概ね一定であるため、特定の分子量や吸着性を持った環境ホルモン物質に対してはそれなりに優れた捕捉作用を発揮する。ところが、上記の様に環境ホルモン物質の種類は極めて多種多様で、分子量や吸着性なども様々であるため、吸着サイトとなる細孔の形状や寸法などが一定である場合は、ある特定の環境ホルモン物質に対しては優れた吸着捕捉能を示すが、分子量や吸着性の異なる他の環境ホルモン物質に対しては、殆ど吸着捕捉能を示さないことも多い。
【0020】
ところが梅種子の炭化物は、前述した如く備長炭や竹炭に比べて細孔の形状が多種多様であるばかりでなく細孔径も様々で細孔径分布が非常に広く、これが、分子量や吸着性の異なる様々の環境ホルモン物質に対して万遍なく優れた吸着作用を発揮する最大の理由と考えている。
【0021】
ちなみに図1,2は、備長炭および梅種子炭化物の電子顕微鏡写真(200倍及び500倍)である。但し、備長炭としては、馬目樫を原木として使用し、最高到達温度が約1250℃となる様に4日間加熱乾留して得たもの、梅種子炭としては、南高梅から果肉を分離して残った種子を収集し、乾燥後、最高到達温度が1100℃となる様に3日間加熱乾留して得たものを使用した。
【0022】
上記各炭を粉砕した後、得られた微粉炭の電子顕微鏡写真を画像解析することによって、各粉炭の平均細孔径と細孔径分布を求め、下記の結果を得た(n数はいずれも10)。但し、細孔径分布は、便宜上、観察領域内の最大細孔径(A)と最小細孔径(B)の比(A/B)として示した。
【0023】
【表1】

Figure 2004181336
【0024】
図1,2および上記表からも明らかな様に、備長炭は細孔の形状が近似しており細孔径もほぼ均一であり、且つ細孔径分布が相対的に狭いのに対し、梅種子炭に見られる細孔の形状は多種様々で細孔径分布も非常に広い。そして、こうした梅種子炭に見られる特有の細孔形状や細孔径分布の広さが、様々の環境ホルモン物質に対して幅広く優れた吸着捕捉能を発揮する所以と考えられる。
【0025】
この様に本発明では、備長炭には見られない梅種子炭に特有の形状特性を、環境ホルモン物質の捕捉に活用するところに特徴を有するものであり、従って、該梅種子炭を環境ホルモン物質の捕捉有効成分として含むものであれば、原料となる梅の種類や梅種子炭の製法、用法などには一切制限されず、全て本発明の範疇に含まれる。
【0026】
例えば梅の種類としては、例えば紀州産の代表的な梅の原木である南高梅、白玉梅、養老梅、古城梅、地蔵梅、薬師梅、内田梅などから得られる梅の実から果肉を採取した後の種子などが全て使用でき、好ましくは果肉を除去した後に水洗、脱塩処理などを施して清浄化したものが使用される。しかし、水洗、脱塩などの処理を省略したものであっても勿論使用可能である。また場合によっては、傷物などそのままでは商品価値のない梅をそのまま、即ち果肉を持ったままで原料として使用することも可能である。
【0027】
梅種子を炭素化するための条件にも格別の制限はなく、要は梅種子を構成する炭素質以外の元素、例えば酸素、水素、窒素、硫黄などを加熱乾留によって分解除去し、炭素質のみを炭化せしめ得る方法であれば、公知の乾留方法を適宜選択して適用すればよい。しかし一般的なのは、非酸化性雰囲気下に1150℃程度以下、好ましくは1100℃程度以下の温度で1〜4日間、より好ましくは3〜4日間加熱する方法である。この際、必要に応じて加熱乾留系に窒素などの非酸化性ガスを吹き込み、酸化(燃焼)を阻止しつつ乾留効率を高めることも有効である。乾留温度の下限は、乾留が進行する250℃程度以上であれば特に制限されないが、通常は400℃以上、より好ましくは600℃以上で行なわれる。
【0028】
加熱乾留を行なうに当っては、梅種子をそのまま、或いは適当なサイズに破砕した後、減圧下で70〜100℃に加熱し、付着水分や含有水分を予め除去してから乾留温度にまで昇温すれば、乾留に要する時間を短縮できると共に熱エネルギーも低減できるので好ましい。なお梅種子の場合、加熱温度が1200℃を超えると、折角生成した炭化物までも熱分解し粉化(灰化)する傾向があるので、加熱温度は1200℃未満に抑えるべきである。加熱乾留後は、非酸化性雰囲気を保った状態で冷却すると、梅種子炭が得られる。
【0029】
得られる梅種子炭は、その後必要により賦活化処理、例えば水蒸気や炭酸ガスによって賦活化した後、放冷後適当なサイズに破砕されるが、後述する如く環境ホルモン捕捉用組成物として様々の用途に適用してその性能を遺憾なく発揮させるには、平均粒径で20μm程度以下、好ましくは10μm以下に微粉砕することが望ましい。因みに、微粉砕することで比表面積も拡大し、環境ホルモン物質に対する吸着捕捉能も一段と向上するからである。なお加熱乾留、あるいは更にはその後の賦活処理によって得られる梅種子炭は極めて脆弱であるから、例えばカッターミルなどで粗粉砕した後、ジェットミルなどを用いて所定サイズまで微粉砕すればよい。
【0030】
かくして得られる梅種子炭の微粉末を有効成分として含む環境ホルモン捕捉用組成物は、以下に例示する如く多種多様の形態で実用化することが可能である。
【0031】
▲1▼繊維材と複合した利用形態:
梅種子炭を合成繊維素材中に練り込み、あるいは天然繊維や合成繊維など付着させて各種の繊維製品(例えばタオルやタオルケット、バスルローブ、シーツ類;トイレマット、バスマット等;肌着、パジャマ等;手袋、靴下、ハンカチ等)とし、当該繊維製品に環境ホルモン捕捉能を持たせる態様、更には、不織布状に加工して環境ホルモン捕捉用フィルターなどとしての利用形態。
【0032】
▲2▼合成樹脂と複合した利用形態;
梅種子炭の微粉末を様々の合成樹脂に練りこみ、これをシート状、フィルム状などの成形品として使用することにより、それら成形品に環境ホルモン捕捉能を持たせる態様。
【0033】
▲3▼パルプ又は紙と複合した利用形態:
各種紙材やパルプに前記梅種子炭を含有させ、
イ)壁紙やカーペット等として、シックハウス症候群の発生を防止するための環境ホルモン捕捉用内装材、
ロ)ボール紙やダンボールとして紙製の衣装ケースや生鮮食料品の包装用トレーや包装箱、通い箱などとして使用し、輸送時や保管時における環境ホルモン汚染の防止、
ハ)トイレットペーパーやキッチンペーパー、ティッシュなどとして、個々の家庭排水からの環境ホルモン捕捉など。
【0034】
▲4▼石鹸素材と複合した利用形態;
梅種子炭の微粉末を液状もしくは固形の洗剤素材中に分散もしくは練りこみ、固形石鹸、ボディーシャンプー、シャンプー、リンス、入浴剤などとしての利用態様。
【0035】
なお上記の如き様々の利用形態において、梅種子炭の好ましい含有率は各々の製品形態や求められる環境ホルモン捕捉能の程度などにより変わってくるので、用途に応じて任意に選択して設定すればよい。
【0036】
【実施例】
以下、実施例を挙げて本発明の具体例を説明するが、本発明はもとより下記実施例によって制限を受けるものではなく、前・後記の趣旨に適合し得る範囲で適当に変更して実施することも可能であり、それらは何れも本発明の技術的範囲に包含される。
【0037】
実施例1
紀州産の南高梅から果肉を採取して得た残りの種子を収集し、果肉などの付着残分と塩分を水洗除去した後、100℃で熱風乾燥して水分を除去する。次いで乾燥物を炭焼き釜へ装入し、最高到達温度が約1100℃となる様に制御しつつ3日間加熱乾留した後、空気を吹き込んで賦活処理してから降温し、梅種子の形状を保った炭化物を得る。これを、カッターミルで粗粉砕した後、ジェットミルで微粉砕することにより微粉炭を得る。
【0038】
得られた微粉炭を、日立社製の電子顕微鏡「S2300」を用いて倍率1200倍で観察し、該顕微鏡写真を画像処理することによって平均細孔径を求めたところ3.7μmであり、細孔径分布(最大細孔径/最小細孔径)は3.0であった。
【0039】
実施例2
馬目樫の原木を炭焼き釜へ装入し、最高到達温度が約1250℃となる様に制御しつつ4日間加熱乾留した後、空気を吹き込んで賦活処理してから降温し、備長炭を得る。これを、カッターミルで粗粉砕した後、ジェットミルで微粉砕することにより微粉炭を得る。
【0040】
得られた微粉炭を日立社製の電子顕微鏡(1200倍)で観察し、該顕微鏡写真を画像処理することによって平均細孔径を求めたところ1.2μmであり、孔径分布(最大細孔径/最小細孔径)は2.0であった。
【0041】
性能評価実験
上記で得た各微粉炭1gを、環境ホルモンとしてビスフェノールA(A)3566cpm(カウント/分)とエストロゲン(B)12753cpmを含む供試水30ccに投入し、室温条件下で撹拌する。そして、微粉炭投入後1時間、3時間および24時間後における被処理水中の上記各環境ホルモン濃度を調べたところ、図3,4に示す結果が得られた。尚、環境ホルモン濃度の測定にはアロカ社製の分析装置「LSC−5100」を使用した。
【0042】
図3,4からも明らかな様に、梅種子炭の微粉炭は、ビスフェノールA(A)およびエストロゲン(B)何れの環境ホルモン物質に対しても、備長炭粉末に比べて格段に優れた捕捉効果を有していることが分かる。
【0043】
【発明の効果】
本発明は以上の様に構成されており、梅種子炭の好ましくは微粉末を環境ホルモンの吸着捕捉用として有効に活用することができる。殊に、該種子炭を20μmレベル以下に粉砕した微粉末を、前述した如く繊維製品、紙・パルプ製品、石鹸類、合成樹脂製品などに含有させれば、身近な生活環境に密着した様々の製品に環境ホルモン捕捉性能を付与することが可能となる。
【図面の簡単な説明】
【図1】備長炭の電子顕微鏡写真である。
【図2】梅炭の電子顕微鏡写真である。
【図3】実施例で得た梅炭微粉砕物による環境ホルモンの捕捉効果を示すグラフである。
【図4】比較例で得た備長炭微粉砕物による環境ホルモンの捕捉効果を示すグラフである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a composition for capturing endocrine disrupting chemicals (hereinafter referred to as environmental hormones in the present specification). More specifically, it includes, as an active ingredient, a charcoal of ume seeds or an activator thereof, among activated carbons. The present invention relates to a capturing composition capable of detoxifying and removing harmful substances corresponding to environmental hormones existing in a living environment such as air and the living environment.
[0002]
[Prior art]
Environmental hormones have been confirmed to disturb the endocrine system when ingested into living organisms, and have adverse effects on ecosystems such as health disorders and reproductive disorders. Recently, the effects on humans have been strongly screamed.
[0003]
Environmental hormones include those that are industrially produced and used as resin materials, surfactants, plasticizers, agricultural chemicals or their raw materials, and those that are by-produced in chemical manufacturing plants and incineration facilities, etc. It has been confirmed to be widely distributed in utilities and drainage, rivers and lakes, seawater, groundwater, soil, etc., and has become a major social problem.
[0004]
Representative examples of such environmental hormones include dioxins and polychlorinated biphenyls (PCB), which are said to affect female hormones and male hormones even in trace amounts in the ppb to ppt order in an aqueous environment. I have.
[0005]
Therefore, biodegradation methods and oxidative decomposition methods using ozone and hydrogen peroxide have been proposed as methods for purifying these environmental hormone contaminated water. Hard to say.
[0006]
Patent Literature 1 discloses a method of adsorbing and removing environmental hormone-containing water with a porous carbonaceous material (powder activated carbon or granular activated carbon). Patent Literature 2 discloses a method of removing environmental hormone contaminated water from iron, carbon, Silicon, Al, Mn, P, Ca in the presence of elements and compounds such as Ca, activated carbon, activated coke, silica, alumina, zeolite, a method of contacting with an adsorptive carrier such as an ion exchange resin, these methods are disclosed. According to the method, a certain effect of removing environmental hormones can be obtained.
[0007]
However, although these methods are expected to have a certain effect as a purification method exclusively for contaminated water, they require large-scale facilities, so that environmental hormones can be used in a daily living environment by affordable means. Cannot be expected to be eliminated.
[0008]
On the other hand, it has been known for a long time that activated carbon has an excellent adsorption and removal effect on various harmful substances, and by utilizing such an effect, it is widely used as a harmful substance remover, deodorant, dehumidifier, etc. Has been
[0009]
By the way, most of the plum seeds that are discharged when producing plum meat products such as plum dried, plum syrup, and plum juice have been dumped or incinerated as industrial waste. It has been confirmed that those obtained by carbonizing by heating to dry distillation or further activated have excellent adsorption ability (Patent Document 3 etc.), and using the carbide as a solid fuel, a dehumidifier, a deodorant, a fertilizer, etc. Several techniques for effective use have been proposed (Patent Documents 4 and 5, etc.).
[0010]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-140834 [Patent Document 2]
JP 2002-254071 A [Patent Document 3]
JP-A-5-212279 [Patent Document 4]
JP 2000-225386 A [Patent Document 5]
JP 2001-106517 A
[Problems to be solved by the invention]
The present inventors have also been conducting research for the purpose of effectively utilizing carbides of plum seeds as industrial materials, but this time particularly focused on the application of the adsorptive activity of the carbides and their activators. In order to develop technologies that can help prevent environmental pollution in our daily living environment, we have continued our research. Accordingly, an object of the present invention is to provide a technique capable of effectively preventing or suppressing environmental pollution in a daily living environment by utilizing the adsorption performance of the carbonized plum seed and its activator. is there.
[0012]
[Means for Solving the Problems]
The environmental hormone capturing composition according to the present invention, which has solved the above-mentioned problems, is characterized in that it contains a char of plum seed or an activator thereof as an active ingredient.
[0013]
In the present invention, it is particularly preferable that the above-mentioned carbide or the activator thereof is contained as a fine powder having an average particle diameter of 20 μm or less, and the carbide is a powder having a plum seed temperature of about 1150 ° C. or less, more preferably about 1100 ° C. or less. It is particularly preferable to carbonize by heating to dry distillation in the region or to further activate using steam, carbon dioxide gas or the like.
[0014]
Examples of the use form of the composition according to the present invention include those in which the powder is composited with pulp, those in which the powder is composited with a soap material, those in which the powder is composited with a thermoplastic resin, and the like. Used in various paper materials, such as wallpaper, paper packaging materials such as cardboard, toilet paper, kitchen paper, tissue, etc .; use as a detergent mixed with liquid or solid soap material; synthetic fiber material Examples of kneading or adhering to natural fiber materials and using them as various fiber products are exemplified. By these, materials used in a familiar living environment can be provided with an environmental hormone capturing function.
[0015]
Embodiments and Examples of the Invention
Under the above-mentioned problems, the present inventors have recently paid attention to adsorption activities for various organic substances with the aim of further expanding the application field and usefulness utilizing the adsorption ability of plum seed carbide and its activator. The superiority over bincho charcoal and bamboo charcoal was quantitatively investigated. As a result, carbonized plum seeds and their activators are particularly effective in the adsorption and capture of various endocrine disruptors by using as fine powders having a mean particle size of 20 μm or less, more preferably about 10 μm or less. It has been found that the present invention has excellent effects, and the present invention has been conceived.
[0016]
The reason why the char of plum seed or its activator exerts specifically excellent performance for capturing various endocrine disrupting substances has not necessarily been clarified, but is considered as follows.
[0017]
That is, as will be described in detail later, the plum seed charcoal has a wide variety of pore shapes and various pore diameters and a very wide pore diameter distribution as compared with Bincho charcoal or bamboo charcoal, which is a wide variety of environmental hormone substances. We believe that it will exhibit an even better adsorption effect.
[0018]
Incidentally, representative dioxins and polychlorinated biphenyls (PCBs) have attracted attention as environmental hormone substances to be captured in the present invention. In addition to these, for example, polybrominated biphenyls (PBBs), hexachlorobenzene (HCB), pentachlorophenol (PCP), 2,4,5-dichlorophenoxyacetic acid, amitrol, atrazine, arachlor, hexachlorocyclohexane, ethyl parathion, carbaryl, chlordane, oxychlordane, 1,2-dibromo-3-chloropropane , DDT, DDE, DDD, aldrin, endrin, tildrine, heptachloroepoxide, estrogen, malathion, nitrophen, toxaphen, tributyltin, triphenyltin, trifluralin, nonylphenol, 4 Octylphenol, bisphenol A, diethylhexyl phthalate, butylbenzyl phthalate, di-n-butyl phthalate, dicyclohexyl phthalate, diethyl phthalate, 2,4-dichlorophenol, di-2-ethylhexyl adipate, benzophenone, 4- Nitrotoluene, octachlorostyrene, aldicarb, dipermethrin, permethrin, pinclozolin, dipentyl phthalate, dihexyl phthalate, dipropyl phthalate, dimer of styrene, n-butylbenzene, etc. The powers vary too.
[0019]
On the other hand, activated carbon derived from Bincho charcoal or bamboo charcoal, etc., has a substantially constant shape and size of pores serving as adsorption sites, and therefore has a somewhat excellent effect on environmental hormone substances having a specific molecular weight and adsorptivity. Exhibits a trapping action. However, as described above, the types of endocrine disrupters are extremely diverse, and the molecular weight and adsorptivity are also various.Therefore, if the shape and size of pores serving as adsorption sites are constant, a specific environment It exhibits excellent adsorption-capturing ability for hormonal substances, but hardly exhibits adsorption-capturing ability for other environmental hormone substances having different molecular weights and adsorptivity.
[0020]
However, as described above, the charcoal of plum seed has not only a wide variety of pore shapes but also a wide variety of pore diameters compared to Bincho charcoal and bamboo charcoal, and a very wide pore diameter distribution, which differs in molecular weight and adsorptivity. This is considered to be the most important reason for exerting an evenly superior adsorption effect on various endocrine disrupters.
[0021]
FIGS. 1 and 2 are electron micrographs (200 × and 500 ×) of bincho charcoal and plum seed charcoal. However, as Bincho charcoal, it was obtained by heating and distilling for 4 days so that the maximum temperature reached about 1250 ° C using Ume oak as raw wood. The remaining seeds were collected, dried, and heat-distilled for 3 days so that the maximum temperature reached 1100 ° C., and used.
[0022]
After pulverizing each of the above coals, the average pore size and the pore size distribution of each pulverized coal were obtained by image analysis of an electron micrograph of the obtained pulverized coal, and the following results were obtained (n is 10 in each case). ). However, the pore size distribution is shown as a ratio (A / B) between the maximum pore size (A) and the minimum pore size (B) in the observation region for convenience.
[0023]
[Table 1]
Figure 2004181336
[0024]
As is clear from FIGS. 1 and 2 and the above table, Bincho charcoal has a similar pore shape and a substantially uniform pore size, and has a relatively narrow pore size distribution. The shape of the pores shown in Table 1 is various and the pore size distribution is very wide. It is considered that the characteristic pore shape and the wide pore diameter distribution of the plum seed charcoal exhibit wide and excellent adsorption-capturing ability for various environmental hormone substances.
[0025]
As described above, the present invention is characterized by utilizing shape characteristics peculiar to plum seed charcoal not found in Bincho charcoal to capture environmental hormone substances. The type of ume as a raw material and the production method and usage of ume seed charcoal are not at all limited as long as they are contained as active substances for capturing substances, and all are included in the scope of the present invention.
[0026]
For example, as the type of plum, for example, the fruit pulp obtained from plum fruits obtained from Minamiko plum, Shirotama plum, Yoro plum, Kojo plum, Jizo plum, Yakushi plum, Uchida plum, etc., which are typical plum logs from Kishu All the collected seeds and the like can be used, and preferably those obtained by removing the pulp and then performing washing and desalting treatments and the like to purify them are used. However, it is of course possible to use those which have omitted treatments such as washing and desalination. In some cases, plums having no commercial value as they are, such as wounds, can be used as raw materials, that is, with pulp.
[0027]
There are no particular restrictions on the conditions for carbonizing plum seeds.In short, elements other than carbonaceous matter that constitutes plum seeds, such as oxygen, hydrogen, nitrogen, and sulfur, are decomposed and removed by heat distillation, and only carbonaceous matter is removed. Any known carbonization method may be appropriately selected and applied as long as it is a method that can be carbonized. However, a general method is heating in a non-oxidizing atmosphere at a temperature of about 1150 ° C. or less, preferably about 1100 ° C. or less, for 1 to 4 days, more preferably 3 to 4 days. At this time, it is also effective to blow a non-oxidizing gas such as nitrogen into the heating dry distillation system as needed to increase the dry distillation efficiency while preventing oxidation (combustion). Although the lower limit of the carbonization temperature is not particularly limited as long as the carbonization proceeds at about 250 ° C. or higher, it is usually performed at 400 ° C. or higher, more preferably at 600 ° C. or higher.
[0028]
In performing the heat distillation, the plum seeds are crushed as they are, or after being crushed to an appropriate size, heated to 70 to 100 ° C. under reduced pressure to remove adhering water and contained water in advance, and then heated to the carbonization temperature. Heating is preferable because the time required for carbonization can be reduced and the heat energy can be reduced. In the case of plum seeds, if the heating temperature exceeds 1200 ° C., even the formed carbides tend to be thermally decomposed and powdered (ashed). Therefore, the heating temperature should be suppressed to less than 1200 ° C. After heating to dryness, cooling while maintaining the non-oxidizing atmosphere gives plum seed charcoal.
[0029]
The obtained plum seed charcoal is then activated if necessary, for example, activated by steam or carbon dioxide, and then allowed to cool and then crushed to an appropriate size. It is desirable that the powder is finely pulverized to an average particle size of about 20 μm or less, and preferably 10 μm or less, in order to apply the above-mentioned method to its performance. By the way, the fine pulverization also increases the specific surface area, and further enhances the ability to adsorb and capture environmental hormone substances. Note that plum seed charcoal obtained by heating dry distillation or further activation treatment is extremely brittle, so that it may be roughly pulverized using a cutter mill or the like and then finely pulverized to a predetermined size using a jet mill or the like.
[0030]
The composition for capturing environmental hormones containing the fine powder of plum seed charcoal thus obtained as an active ingredient can be put into practical use in various forms as exemplified below.
[0031]
(1) Usage form combined with fiber material:
Plum seed charcoal is kneaded into a synthetic fiber material, or attached to natural fiber or synthetic fiber, etc., and various fiber products (eg, towels, towels, bath robes, sheets; toilet mats, bath mats, etc .; underwear, pajamas, etc .; gloves, Socks, handkerchiefs, and the like), and the fiber product has an environmental hormone capturing ability, and further, is processed into a nonwoven fabric and used as an environmental hormone capturing filter.
[0032]
(2) Usage form combined with synthetic resin;
An embodiment in which fine powder of plum seed charcoal is kneaded into various synthetic resins and used as molded products such as sheets and films to give these molded products the ability to capture environmental hormones.
[0033]
(3) Usage form combined with pulp or paper:
Various paper materials and pulp containing the plum seed charcoal,
B) interior materials for capturing environmental hormones, such as wallpaper and carpets, to prevent the occurrence of sick house syndrome;
B) Used as a cardboard box or cardboard as a paper outfit case, a packaging tray for fresh food, a packaging box, a return box, etc. to prevent environmental hormone contamination during transportation and storage.
C) Captures environmental hormones from individual household wastewater, such as toilet paper, kitchen paper, and tissue.
[0034]
(4) Usage form combined with soap material;
Plum seed charcoal fine powder is dispersed or kneaded in a liquid or solid detergent material, and is used as a solid soap, a body shampoo, a shampoo, a rinse, a bathing agent and the like.
[0035]
In the various utilization forms as described above, the preferable content of plum seed charcoal varies depending on each product form and the degree of the required endocrine disrupting ability, and may be arbitrarily selected and set according to the application. Good.
[0036]
【Example】
Hereinafter, specific examples of the present invention will be described with reference to examples. However, the present invention is not limited to the following examples as a matter of course. It is also possible that they are all included in the technical scope of the present invention.
[0037]
Example 1
The remaining seeds obtained by collecting the pulp from Minamikoume produced in Kishu are collected, and the remaining residue such as the pulp and the salt are washed and removed with water, followed by hot air drying at 100 ° C. to remove the moisture. Next, the dried product is charged into a charcoal kiln, heated and carbonized for 3 days while controlling the maximum temperature to be about 1100 ° C., activated by blowing air, and then cooled to maintain the shape of plum seeds. Obtained carbide. This is roughly pulverized by a cutter mill and then finely pulverized by a jet mill to obtain pulverized coal.
[0038]
The obtained pulverized coal was observed at a magnification of 1200 times using an electron microscope “S2300” manufactured by Hitachi, Ltd., and the microscopic photograph was processed to obtain an average pore diameter of 3.7 μm. The distribution (maximum pore diameter / minimum pore diameter) was 3.0.
[0039]
Example 2
The raw wood of Mame oak is charged into a charcoal kiln, heated and carbonized for 4 days while controlling the maximum temperature to about 1250 ° C, then activated by blowing air, and then cooled to obtain Bincho charcoal. . This is roughly pulverized by a cutter mill and then finely pulverized by a jet mill to obtain pulverized coal.
[0040]
The obtained pulverized coal was observed with an electron microscope (1200 times) manufactured by Hitachi, Ltd., and the microscopic photograph was subjected to image processing to obtain an average pore diameter of 1.2 μm. The pore diameter distribution was (maximum pore diameter / minimum pore diameter). (Pore diameter) was 2.0.
[0041]
Performance Evaluation Experiment 1 g of each of the pulverized coals obtained above is put into 30 cc of test water containing 3566 cpm (count / min) of bisphenol A (A) and estrogen (B) 12753 cpm as environmental hormones, and stirred at room temperature. When the concentrations of each of the above-mentioned endocrine disruptors in the water to be treated were examined at 1 hour, 3 hours and 24 hours after the pulverized coal was charged, the results shown in FIGS. 3 and 4 were obtained. In addition, the analyzer "LSC-5100" made by Aloka was used for the measurement of the environmental hormone concentration.
[0042]
As is apparent from FIGS. 3 and 4, pulverized coal of plum seed charcoal captures both of the environmental hormone substances of bisphenol A (A) and estrogen (B), which is far superior to Bincho charcoal powder. It turns out that it has an effect.
[0043]
【The invention's effect】
The present invention is configured as described above, and preferably a fine powder of plum seed charcoal can be effectively utilized for adsorption and capture of environmental hormones. In particular, if the fine powder obtained by pulverizing the seed charcoal to a level of 20 μm or less is contained in fiber products, paper / pulp products, soaps, synthetic resin products, and the like as described above, various types of products closely adhered to the familiar living environment can be obtained. It is possible to impart endocrine disrupting performance to the product.
[Brief description of the drawings]
FIG. 1 is an electron micrograph of Bincho charcoal.
FIG. 2 is an electron micrograph of plum charcoal.
FIG. 3 is a graph showing the effect of capturing environmental hormones by pulverized plum charcoal obtained in Examples.
FIG. 4 is a graph showing the capturing effect of environmental hormones by the finely ground Bincho charcoal obtained in Comparative Example.

Claims (6)

梅種子の炭化物またはその賦活物を有効成分として含有することを特徴とする環境ホルモン捕捉用組成物。A composition for capturing environmental hormones, comprising a char of plum seed or an activator thereof as an active ingredient. 前記炭化物またはその賦活物を、平均粒径20μm以下の微粉末として含むものである請求項1に記載の環境ホルモン捕捉用組成物。The composition for capturing environmental hormones according to claim 1, wherein the carbide or the activator thereof is contained as fine powder having an average particle size of 20 µm or less. 前記炭化物またはその賦活物が、梅種子を1150℃以下の温度で加熱乾留することにより炭化し、あるいは更に賦活処理したものである請求項1または2に記載の環境ホルモン捕捉用組成物。3. The composition for capturing environmental hormones according to claim 1, wherein the carbide or an activator thereof is obtained by carbonizing a plum seed by heating to dryness at a temperature of 1150 ° C. or lower, or further performing an activation treatment. 4. 前記粉末を、パルプに付着させたものである請求項2または3に記載の環境ホルモン捕捉用組成物。The composition for capturing environmental hormones according to claim 2 or 3, wherein the powder is attached to pulp. 前記粉末を、石鹸素材に混入させたものである請求項2または3に記載の環境ホルモン捕捉用組成物。The composition for capturing environmental hormones according to claim 2 or 3, wherein the powder is mixed with a soap material. 前記粉末を、熱可塑性樹脂中に混入させたものである請求項2または3に記載の環境ホルモン捕捉用組成物。The composition for trapping environmental hormones according to claim 2 or 3, wherein the powder is mixed in a thermoplastic resin.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007253127A (en) * 2006-03-24 2007-10-04 Kochi Univ Method for removing allergy-initiating substance
JP2010521297A (en) * 2007-03-21 2010-06-24 オムヤ・デイベロツプメント・アー・ゲー Surface treated calcium carbonate and its use in wastewater treatment
JP2010154948A (en) * 2008-12-26 2010-07-15 Crown Package Co Ltd Boot shaper and method of manufacturing the same
JP2010241648A (en) * 2009-04-07 2010-10-28 National Institute Of Advanced Industrial Science & Technology Hydrophilic microporous carbon body and production method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007253127A (en) * 2006-03-24 2007-10-04 Kochi Univ Method for removing allergy-initiating substance
JP2010521297A (en) * 2007-03-21 2010-06-24 オムヤ・デイベロツプメント・アー・ゲー Surface treated calcium carbonate and its use in wastewater treatment
JP2010154948A (en) * 2008-12-26 2010-07-15 Crown Package Co Ltd Boot shaper and method of manufacturing the same
JP2010241648A (en) * 2009-04-07 2010-10-28 National Institute Of Advanced Industrial Science & Technology Hydrophilic microporous carbon body and production method thereof

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