JP3967092B2 - Method for measuring airborne PCB concentration in PCB handling facilities and equipment - Google Patents
Method for measuring airborne PCB concentration in PCB handling facilities and equipment Download PDFInfo
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- JP3967092B2 JP3967092B2 JP2001151115A JP2001151115A JP3967092B2 JP 3967092 B2 JP3967092 B2 JP 3967092B2 JP 2001151115 A JP2001151115 A JP 2001151115A JP 2001151115 A JP2001151115 A JP 2001151115A JP 3967092 B2 JP3967092 B2 JP 3967092B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、気体のＰＣＢ濃度測定方法に関し、特にＰＣＢ取扱施設及び設備内外における気中ＰＣＢのモニタリングを簡便かつ迅速に行うことができる測定方法に関する。
【０００２】
【従来の技術】
ＰＣＢ（ポリ塩化ビフェニール）は、その優れた各種の物理的性質と極めて高い安定性とからトランスなどの電機機器などに広く使用されたが、その人体と環境への影響が問題となって新規使用が中止され、回収されたＰＣＢはその処理が進展しないこともあり、保管を余儀なくされているものも多い。
【０００３】
ＰＣＢを処理、保管、収集、運搬するに当たっては、作業環境、周辺環境への影響を把握するため、気中のＰＣＢ濃度を把握することが必要である。
従来、気中のＰＣＢ濃度測定方法としては、昭和４７年環境庁大気保全局による「気相ＰＣＢ測定要領」に定められている。また、ダイオキシン類及びコブラナーＰＣＢの測定方法としては、ＪＩＳ Ｋ０３１１「排ガス中のダイオキシン類及びコブラナーＰＣＢの測定方法」が定められている。
【０００４】
【発明が解決しようとする課題】
しかし、これらの方法は分析操作が煩雑で、分析に要する時間が非常に長いという問題がある。特に、ＪＩＳ Ｋ０３１１の測定方法は、分析費用が数十万円／検体と高価である。そこで、気中のＰＣＢ濃度を容易にかつ迅速に分析できる方法を開発することが望まれている。
本発明は、このような従来の課題に鑑みてなされたものであり、ＰＣＢ処理、保管、収集運搬にあたって、気中のＰＣＢ濃度を簡便かつ迅速にモニタリングできる方法を提供することを課題とする。
【０００５】
【課題を解決するための手段】
本発明は、上記の課題を下記の手段により達成することができた。
（１）ＰＣＢ取扱施設及び設備内外における気体のＰＣＢ濃度測定方法において、前記気体から採取した全有機ハロゲン化合物濃度をＴＯＸ分析装置で測定し、該ＴＯＸ分析装置による測定値を採取気体量とＰＣＢ中の含塩素率との積で除してＰＣＢ濃度を算出することを特徴とするＰＣＢ取扱施設及び設備内外における気中ＰＣＢ濃度測定方法。
（２）前記ＴＯＸ分析装置の測定対象は、活性炭カラムを含むサンプリン系全体を５０〜１００℃で保温しながら所定量の気体を通した後の該活性炭であることを特徴とする前記（１）記載の気中ＰＣＢ濃度測定方法。
【０００６】
本発明は、気中の有機ハロゲン化合物の全てを対象とするため、ＰＣＢのみを対象としているわけではなく、測定精度が少し低くなるという欠点がある。しかし、全有機ハロゲン化合物の測定方法は比較的簡単であること、ＰＣＢ処理、保管、収集運搬施設においては、気中の有機ハロゲン化合物のうち、ＰＣＢの割合が有意に高いことが想定され、かつ測定値はＰＣＢ単独の場合よりも高めに出るため、基準値の比較に際してはより安全側にあるように作用することから、モニタリング方法として有効である。
本発明において測定できる気体としては、ＰＣＢ取扱施設及び設備内外の気体、例えば、ＰＣＢ処理施設の排気や、液状ＰＣＢあるいはＰＣＢ含有油貯留設備の通気排気、処理、保管施設、収集運搬設備の空気、作業環境空気、処理施設周辺環境などの空気が挙げられる。なお、ここでＰＣＢ取扱施設及び設備とは、液状ＰＣＢ及びＰＣＢを含む油（廃ＰＣＢ等）だけではなく、ＰＣＢ汚染物、ＰＣＢ処理物を取り扱う施設及び設備をいう。
これらの測定を行うに際しては、ＰＣＢ取扱施設等において、予め他の分析法で測定したＰＣＢ濃度との相関関係を求めておくことにより、より正確な濃度を得ることができる。
【０００７】
【発明の実施の形態】
以下、本発明の実施の形態を、図面に基づいて詳細に説明する。
図１は、本発明の測定方法に基づき、ＰＣＢ処理施設内外の気体を測定する場合の概要説明図を示したものである。
ＰＣＢ処理施設内外の気体１を気体サンプリング装置２の吸引ポンプ５でガス吸引口から吸引して、所定量の気体１をサンプリング用活性炭カラム３に通して、それにガス中の成分を吸着させる。気体１の吸引量は積算流量計４で計る。
サンプリング作業が終わったら、気体サンプリング装置２からサンプリング用活性炭カラム３を取り出して、ＴＯＸ分析装置６に入れて全有機ハロゲン化合物の測定方法により分析を行う。ＴＯＸ分析装置６からの測定値によりＰＣＢ濃度算定作業７をしてＰＣＢ濃度値を求める。
【０００８】
この図１に示す本発明の測定方法を行うに当たっては、気体サンプリングの活性炭カラム３に、ＴＯＸ用サンプリングカラムを用いる。気体のサンプリング量は確認すべき気中ＰＣＢ濃度による。例えば、気中濃度が０．１ｍｇ・ＰＣＢ／ｍ3 以下であることを確認するためには、２〜１０リットル程度をサンプリングすればよい。採取ガス量は、積算流量計４で確認する。また、サンプリング系は全体を５０〜１００℃に保温することが好ましい。サンプリング後の活性炭は、通常のＴＯＸ計で測定する。気中ＰＣＢ濃度は、ＴＯＸ計での測定値から、次の式により算出する。
【０００９】
【式１】
【実施例】
以下において、本発明を実施例によりさらに具体的に説明するが、本発明は、これらの実施例により限定されるものではない。
【００１１】
実施例１
本発明のＰＣＢモニタリング方法が、ＰＣＢ濃度の指標になることを確認するため、ＰＣＢを気化させてＰＣＢ含有気体を実験的に調製し、本発明方法とガスクロマトグラフによる方法で測定した。本発明方法の測定系は、図１の概要説明図に示す態様からなるものである。この際、実験に用いたＰＣＢ含有気体は全て活性炭により吸着処理し、環境中への排出を防止した。その測定結果を第１表に示す。
これにより、全有機ハロゲン化合物量の測定値からの換算ＰＣＢ濃度は、ガスクロマトグラフによる測定値に近く、指標として有効である。
【００１２】
【表１】
【発明の効果】
本発明によれば、面倒なＰＣＢの測定法を用いることなく、簡単な全有機ハロゲン化合物量（ＴＯＸ）の測定法を用いることにより、ＰＣＢの濃度を求めることができるので、簡易にかつ迅速にＰＣＢのモニタリングを行うことができる。本発明によれば、ＰＣＢ取扱施設及び設備内外のＰＣＢのモニタリング手法として、全有機ハロゲン化合物量（ＴＯＸ）を測定して指標とする方法が適用でき、簡便かつ迅速にＰＣＢ濃度をモニタリングする方法を確立できた。
【図面の簡単な説明】
【図１】本発明の測定方法による気中ＰＣＢ濃度を測定する際の概要説明図を示す。
【符号の説明】
１ 気体
２ 気体サンプリング装置
３ サンプリング用活性炭カラム
４ 積算流量計
５ 吸引ポンプ
６ ＴＯＸ分析装置
７ ＰＣＢ濃度算定作業[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for measuring a PCB concentration of a gas, and more particularly to a measurement method capable of simply and quickly monitoring an airborne PCB inside and outside a PCB handling facility and equipment.
[0002]
[Prior art]
PCBs (polychlorinated biphenyls) were widely used in electrical equipment such as transformers due to their excellent physical properties and extremely high stability, but they were newly used due to their effects on the human body and the environment. However, the processing of the recovered PCB may not proceed, and many of the PCBs are forced to be stored.
[0003]
When processing, storing, collecting and transporting PCBs, it is necessary to understand the PCB concentration in the air in order to understand the impact on the work environment and the surrounding environment.
Conventionally, as a method for measuring the concentration of PCBs in the air, it has been stipulated in the “Guidelines for Measuring Gas Phase PCBs” by the Environmental Protection Agency of Japan in 1972. In addition, as a method for measuring dioxins and cobraner PCB, JIS K0311 “Measuring method of dioxins and cobraner PCB in exhaust gas” is defined.
[0004]
[Problems to be solved by the invention]
However, these methods have a problem that the analysis operation is complicated and the time required for the analysis is very long. In particular, the measuring method of JIS K0311 has an analysis cost as high as several hundred thousand yen / sample. Therefore, it is desired to develop a method that can easily and quickly analyze the PCB concentration in the air.
This invention is made | formed in view of such a conventional subject, and makes it a subject to provide the method which can monitor the PCB density | concentration in the air simply and rapidly in PCB processing, storage, collection conveyance.
[0005]
[Means for Solving the Problems]
The present invention has achieved the above-described problems by the following means.
(1) In the PCB concentration measurement method for PCB inside and outside PCB handling facilities, the total organic halogen compound concentration collected from the gas is measured with a TOX analyzer, and the measured value by the TOX analyzer is collected in the amount of collected gas and PCB The PCB concentration is calculated by dividing the product by the product of the chlorine content of the PCB, and the PCB concentration measurement method in the air inside and outside the PCB handling facility and equipment.
(2) The measurement object of the TOX analyzer is the activated carbon after passing a predetermined amount of gas while keeping the entire sampled system including the activated carbon column at 50 to 100 ° C. (1) The air PCB concentration measurement method described.
[0006]
Since the present invention targets all the organic halogen compounds in the air, it does not target only the PCB, and has a drawback that the measurement accuracy is slightly lowered. However, the method for measuring all organic halogen compounds is relatively simple, and in PCB processing, storage, collection and transportation facilities, it is assumed that the proportion of PCBs in the organic halogen compounds in the air is significantly high, and Since the measured value is higher than that of PCB alone, it is effective as a monitoring method because it acts to be on the safer side when comparing the reference values.
Gases that can be measured in the present invention include gases inside and outside PCB handling facilities and equipment, for example, exhaust from PCB processing facilities, ventilation exhaust from liquid PCBs or PCB-containing oil storage facilities, processing, storage facilities, and air from collection and transportation facilities, Examples include working environment air and air around the processing facility. Here, the PCB handling facility and equipment refer to not only liquid PCB and oil containing PCB (waste PCB etc.) but also facilities and equipment that handle PCB contaminants and PCB processed products.
When performing these measurements, a more accurate concentration can be obtained by obtaining a correlation with the PCB concentration measured by another analysis method in advance at a PCB handling facility or the like.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic explanatory diagram for measuring gas inside and outside a PCB processing facility based on the measurement method of the present invention.
The
When the sampling operation is completed, the activated
[0008]
In performing the measurement method of the present invention shown in FIG. 1, a TOX sampling column is used as the activated
[0009]
[Formula 1]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.
[0011]
Example 1
In order to confirm that the PCB monitoring method of the present invention is an indicator of PCB concentration, PCB-containing gas was experimentally prepared by vaporizing PCB, and measured by the method of the present invention and the method using a gas chromatograph. The measurement system of the method of the present invention comprises the aspect shown in the schematic explanatory diagram of FIG. At this time, the PCB-containing gas used in the experiment was all adsorbed with activated carbon to prevent discharge into the environment. The measurement results are shown in Table 1.
Thereby, the converted PCB concentration from the measured value of the total amount of the organic halogen compound is close to the measured value by the gas chromatograph and is effective as an index.
[0012]
[Table 1]
【The invention's effect】
According to the present invention, the PCB concentration can be obtained by using a simple method for measuring the total amount of organic halogen compounds (TOX) without using a troublesome PCB measurement method, so that it can be easily and quickly performed. PCB monitoring can be performed. According to the present invention, as a method for monitoring PCBs inside and outside PCB handling facilities and equipment, a method for measuring the total organic halogen compound amount (TOX) and using it as an index can be applied, and a method for monitoring PCB concentration simply and quickly. I was able to establish.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram when measuring the concentration of airborne PCBs by the measurement method of the present invention.
[Explanation of symbols]
DESCRIPTION OF
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001151115A JP3967092B2 (en) | 2001-05-21 | 2001-05-21 | Method for measuring airborne PCB concentration in PCB handling facilities and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001151115A JP3967092B2 (en) | 2001-05-21 | 2001-05-21 | Method for measuring airborne PCB concentration in PCB handling facilities and equipment |
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| Publication Number | Publication Date |
|---|---|
| JP2002340880A JP2002340880A (en) | 2002-11-27 |
| JP3967092B2 true JP3967092B2 (en) | 2007-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001151115A Expired - Fee Related JP3967092B2 (en) | 2001-05-21 | 2001-05-21 | Method for measuring airborne PCB concentration in PCB handling facilities and equipment |
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| JP (1) | JP3967092B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5465737B2 (en) * | 2012-01-27 | 2014-04-09 | 中国電力株式会社 | Sample gas sampling device |
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| Publication number | Publication date |
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| JP2002340880A (en) | 2002-11-27 |
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