報告書番号

480018

タイトル（和文）

能代地域におけるマツ葉および土壌含有元素の濃度分布

タイトル（英文）

CONCENTRATIONS OF FIFTEEN ELEMENTS IN PINE NEEDLES AND SOILS IN THE NOSHIRO AREA OF AKITA PREFECTURE

概要 （図表や脚注は「報告書全文」に掲載しております）

能代市を中心にした半径約３５ｋｍ圏内の９地点から，マツ葉（旧年葉）と土壌を採取し，１５元素（Ｓｉ，Ａｌ，Ｆｅ，Ｃｌ，Ｓ，Ｍｎ，Ｚｎ，Ｖ，Ｃｒ，Ｃｕ，Ｎｉ，Ｐｂ，Ａｓ，Ｃｄ，Ｈｇ）の濃度分布について検討を行なった。１）マツ葉含有元素について，Ｃｒ以外の元素の濃度分布は，両年度間の差異がほとんどみられなかった。各元素の調査地点間の分布は，Ｚｎ以外の元素では特定の傾向はみられなかった。各元素の葉面付着量の割合を検討する目的でマツ葉を洗浄葉と未洗浄葉に二区分した結果，両区分の間に顕著な相違はみられなかった。２）土壌中のＣｒ，Ｎｉ，Ｖの３元素は地点間の分布傾向が類似していたが，その他の元素については地点間の分布に特定の傾向はみられなかった。３）マツ葉含有濃度と土壌含有濃度との相関性を検討した結果，ＭｎとＮｉに比較的高い相関がみられた。

概要 （英文）

ONE YEAR OLD PINE NEEDLES AND SURFACE SOILS WERE COLLECTED DURING 1978 AND 1979 FROM NINE SITES WITHIN A 35 KM RADIUS OF NOSHIRO AREA.AKITA PREFECTURE.FIFTEEN ELEMENTS(SI,AL,FE,CL,S,MN,ZN,V,CR,CU,NI,PB,AS,CD AND HG)WERE ANALYZED BY ATOMIC ABSORPTION SPECTROMETRY,COLORIMETRIC,AND ELECTROCHEMICAL PROCEDURES AS APPLICABLE TO PROVIDE BASELINE LEVELS OF THE CONCENTRATION OF THESE ELEMENTS IN THE NOSHIRO AREA. THERE WAS NO APPARENT DIFFERENCE IN CONCENTRATION LEVELS OF THE ELEMENTS IN PINE NEEDLE SAMPLES EXCEPT FOR CR BETWEEN THE SAMPLING YEARS.ZINC CONCENTRATION IN PINE NEEDLES WAS HIGHEST AT THE SEASHORE SAMPLES. TO SEPARATE ELEMENTS ADHERING TO THE LEAF SURFACE FROM THOSE WITHIN PLANT TISSUES,PINE NEEDLES WERE WASHED WITH DEIONIZED WATER PRIOR TO ANALYSIS.HOWEVER,THERE WAS NO APPARENT DIFFERENCE IN THE ELEMENT LEVELSBETWEEN PRE-WASHED SAMPLES AND NO TREATMENT ONES. DISTRIBUTION PATTERNS OF CR,NI AND V IN SOIL SAMPLES INDICATED HIGH CORRELATION COEFFICIENTS WITH EACH OTHER,HOWEVER,OTHER ELEMENTS SHOWED NO APPARENT TENDENCY INDISTRIBUTION OF CONCENTRATION BETWEEN SAMPLING SITES. CONCENTRATIONS OF MN AND NI BETWEEN PINE NEEDLES AND SOILS IN SPECIMENS COLLECTED IN 1979 HAD RELATIVELY HIGH CORRELATION COEFFICIENT:0.85 FOR MN AND 0.77 FORNI. THE RESULTS OF THIS FIELD SURVEY IS PROBABLY INDICATIVE OF A BACKGROUND VALUE IN AN AREA WITH LOW AIR POLLUTION.

報告者

キーワード