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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">东日本300年内都将受到核污染 </h1> <p class="xg1"> 时间：2011-3-23 16:45<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(957)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=1789&idtype=aid" title="查看全部评论"><em id="_commentnum">1</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>日本福岛核灾的后续影响之一，就是会让水源或食物受污染。香港城市大学生物及化学系副教授林汉华表示，铯137的半衰期约需30年，完全消失更需要长达三百年。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content">日本福岛核灾的后续影响之一，就是会让水源或食物受污染。香港城市大学生物及化学系副教授林汉华表示，铯137的半衰期约需30年，完全消失更需要长达三百年。根据香港“东方日报”报道，如果日本东北部的水源或食物受铯137污染，估计整个日本东部将会由农<a href="http://b.oecr.com/sell" target="_blank" class="relatedlink">产品</a>盛产地变成废土，无法再进行耕种。<BR><BR>据香港“明报”指出，日本福岛核灾可能外泄的放射性物质为碘131及铯137，半衰期分别为8天和30年，而长远的辐射遗害可分别长达80天和3百年。而辐射物质放出辐射线后会变成另外一种物质，这现象称为衰变，半衰期就是因放射性衰变而使其活度降低到原来一半所消耗的时间。<BR><BR> <P><A href="http://www.oecr.com/data/attachment/portal/201103/23/16445672vvn4kaek2w6z44.jpg" target=_blank><IMG src="http://www.oecr.com/data/attachment/portal/201103/23/16445672vvn4kaek2w6z44.jpg"></A></P>碘131和铯137都会让人体致癌，并透过空气，水或食物链被人体吸收碘131容易高度挥发融入空气，也会混入水源被农作物吸收，尤其是叶菜类。铯137则较容易出现在菇类与野鸟。<BR><BR>如果要清理辐射污染地区，得将被污染的土壤放进特制的焚化炉焚烧，也可混合溶剂把污染物化作液体，或以电渗析分开放射性离子。另外，失效的反应炉关闭后仍会长时间放出辐射。<BR><BR>香港大学及香港中文大学食品安全硕士课程讲师张刘丽贤表示，日本东部盛产蔬果，铯137进入泥土及水源，需要长达三百年的时间才能彻底消失，让有关区域犹如荒土。</td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table cellpadding="0" cellspacing="0" class="atd"> <tr><td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=1&idtype=aid&id=1789&hash=f92e81eae1cd711b53f83844d3748b85&handlekey=clickhandle" id="click_aid_1789_1" onclick="showWindow(this.id, this.href);doane(event);"> <div class="atdc"> <div class="ac1" style="height:10px;"> <em>1</em> </div> </div> <img src="static/image/click/jidan.gif" alt="" /><br />鸡蛋</a> </td> 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