本文主要研究内容
作者李鑫（2019）在《外源输入对湖泊疏浚新生表层磷再生及迁移转化的影响》一文中研究指出：外源输入对底泥疏浚新生表层磷再生及迁移转化的影响尚不清楚,阐明该问题对于底泥疏浚实施后流域尺度上的外源控制及管理具有重要的意义。本研究以太湖梅梁湾沉积物为研究对象,采用野外原位模拟疏浚的方法研究在有无外源颗粒物输入条件下,疏浚前后新生泥水界面磷的迁移转化过程,并探讨疏浚对内源磷释放的控制效果。得出以下结论:（1）颗粒物的持续累积增加了表层沉积物含水率及孔隙度;疏浚降低了表层沉积物LOI、TP及TN含量,但颗粒物的持续累积导致表层沉积物LOI、TP及TN含量存在较大程度的升高,有外源组未疏浚与疏浚柱样TP含量是无外源组的1.5和1.6倍,TN含量则达到1.8和1.6倍,外源输入加重了沉积物污染状况,减弱了疏浚措施所带来的效果。（2）无外源疏浚组与未疏浚组沉积物-水界面氧含量达到了9.0mg·L-1和8.3mg·L-1,氧气渗透深度也高达8.8mm和6.8mm,显著高于有外源各组。疏浚与阻绝外源颗粒物输入均可在一定程度上改善沉积物的氧化还原状况。（3）疏浚与阻绝外源颗粒物输入对表层沉积物Mobile-P含量的控制均产生着积极的影响,减弱了其与间隙水中溶解态磷的交换作用以及向上覆水体迁移的可能性;沉积物中Fe-P有向Ca-P转化的趋势;在无外源组发现,疏浚柱样和未疏浚柱样表层沉积物中Org-P分别与Ca-P和Al-P呈显著负相关,分别存在Org-P向Ca-P和Al-P转化的可能性。在阻绝外源条件下,更有利于Mobile-P向较稳定的难释放态磷的转化。（4）悬浮颗粒物的EPC0显著高于各沉积物组,其浓度范围为0.0360.160mg·L-1,无外源未疏浚组年内变化较小,范围为0.0170.040mg·L-1,始终保持较低水平,疏浚措施与阻绝外源输入在一定程度上均能有效降低沉积物EPC0,对其向上覆水体的释放风险有较好地减弱作用;随着试验的进行,沉积物补充离子能力由无缓冲型转变成部分缓冲型,该能力的提升在外源组体现的更为显著;疏浚增强了沉积物对磷的滞留能力,提升了沉积物与间隙水之间的动力学响应,有效减弱了沉积物中磷的释放潜力。（5）U、U+S和D+S组间隙水PO43--P浓度随季节差异较大,浓度范围分别为0.161.81mg·L-1、0.131.44 mg·L-1和0.111.27 mg·L-1,而D组间隙水PO43--P浓度始终保持着较低的水平0.110.46 mg·L-1;夏季U+S组和D+S组间隙水DRP浓度在沉积物-水界面以下8mm处达到最大,分别为1.01mg·L-1和0.35mg·L-1。（6）沉积物在一年内发生了两次源-汇功能转变,冬春季间沉积物对上覆水由汇转变成为源;无外源组在夏秋季间沉积物对上覆水由源转变成为汇,而该现象在有外源组则出现于秋冬季间,外源输入延长了沉积物向上覆水体释磷时长约2个月;疏浚措施降低了底泥内源磷释放通量,可有效控制其内源磷释放,阻绝外源颗粒物输入对疏浚控制内源磷负荷起到了较好的促进作用。综上所述,颗粒物的持续累积对疏浚新生界面产生一系列负效应,若不采取措施控制外源颗粒物的输入,疏浚对内源磷负荷的控制效果难以实现长效。因此,在进行疏浚前须对颗粒物的污染状况加以调查研究,以确定是否能够开展疏浚工程。
Abstract
wai yuan shu ru dui de ni shu jun xin sheng biao ceng lin zai sheng ji qian yi zhuai hua de ying xiang shang bu qing chu ,chan ming gai wen ti dui yu de ni shu jun shi shi hou liu yu che du shang de wai yuan kong zhi ji guan li ju you chong yao de yi yi 。ben yan jiu yi tai hu mei liang wan chen ji wu wei yan jiu dui xiang ,cai yong ye wai yuan wei mo ni shu jun de fang fa yan jiu zai you mo wai yuan ke li wu shu ru tiao jian xia ,shu jun qian hou xin sheng ni shui jie mian lin de qian yi zhuai hua guo cheng ,bing tan tao shu jun dui nei yuan lin shi fang de kong zhi xiao guo 。de chu yi xia jie lun :（1）ke li wu de chi xu lei ji zeng jia le biao ceng chen ji wu han shui lv ji kong xi du ;shu jun jiang di le biao ceng chen ji wu LOI、TPji TNhan liang ,dan ke li wu de chi xu lei ji dao zhi biao ceng chen ji wu LOI、TPji TNhan liang cun zai jiao da cheng du de sheng gao ,you wai yuan zu wei shu jun yu shu jun zhu yang TPhan liang shi mo wai yuan zu de 1.5he 1.6bei ,TNhan liang ze da dao 1.8he 1.6bei ,wai yuan shu ru jia chong le chen ji wu wu ran zhuang kuang ,jian ruo le shu jun cuo shi suo dai lai de xiao guo 。（2）mo wai yuan shu jun zu yu wei shu jun zu chen ji wu -shui jie mian yang han liang da dao le 9.0mg·L-1he 8.3mg·L-1,yang qi shen tou shen du ye gao da 8.8mmhe 6.8mm,xian zhe gao yu you wai yuan ge zu 。shu jun yu zu jue wai yuan ke li wu shu ru jun ke zai yi ding cheng du shang gai shan chen ji wu de yang hua hai yuan zhuang kuang 。（3）shu jun yu zu jue wai yuan ke li wu shu ru dui biao ceng chen ji wu Mobile-Phan liang de kong zhi jun chan sheng zhao ji ji de ying xiang ,jian ruo le ji yu jian xi shui zhong rong jie tai lin de jiao huan zuo yong yi ji xiang shang fu shui ti qian yi de ke neng xing ;chen ji wu zhong Fe-Pyou xiang Ca-Pzhuai hua de qu shi ;zai mo wai yuan zu fa xian ,shu jun zhu yang he wei shu jun zhu yang biao ceng chen ji wu zhong Org-Pfen bie yu Ca-Phe Al-Pcheng xian zhe fu xiang guan ,fen bie cun zai Org-Pxiang Ca-Phe Al-Pzhuai hua de ke neng xing 。zai zu jue wai yuan tiao jian xia ,geng you li yu Mobile-Pxiang jiao wen ding de nan shi fang tai lin de zhuai hua 。（4）xuan fu ke li wu de EPC0xian zhe gao yu ge chen ji wu zu ,ji nong du fan wei wei 0.0360.160mg·L-1,mo wai yuan wei shu jun zu nian nei bian hua jiao xiao ,fan wei wei 0.0170.040mg·L-1,shi zhong bao chi jiao di shui ping ,shu jun cuo shi yu zu jue wai yuan shu ru zai yi ding cheng du shang jun neng you xiao jiang di chen ji wu EPC0,dui ji xiang shang fu shui ti de shi fang feng xian you jiao hao de jian ruo zuo yong ;sui zhao shi yan de jin hang ,chen ji wu bu chong li zi neng li you mo huan chong xing zhuai bian cheng bu fen huan chong xing ,gai neng li de di sheng zai wai yuan zu ti xian de geng wei xian zhe ;shu jun zeng jiang le chen ji wu dui lin de zhi liu neng li ,di sheng le chen ji wu yu jian xi shui zhi jian de dong li xue xiang ying ,you xiao jian ruo le chen ji wu zhong lin de shi fang qian li 。（5）U、U+She D+Szu jian xi shui PO43--Pnong du sui ji jie cha yi jiao da ,nong du fan wei fen bie wei 0.161.81mg·L-1、0.131.44 mg·L-1he 0.111.27 mg·L-1,er Dzu jian xi shui PO43--Pnong du shi zhong bao chi zhao jiao di de shui ping 0.110.46 mg·L-1;xia ji U+Szu he D+Szu jian xi shui DRPnong du zai chen ji wu -shui jie mian yi xia 8mmchu da dao zui da ,fen bie wei 1.01mg·L-1he 0.35mg·L-1。（6）chen ji wu zai yi nian nei fa sheng le liang ci yuan -hui gong neng zhuai bian ,dong chun ji jian chen ji wu dui shang fu shui you hui zhuai bian cheng wei yuan ;mo wai yuan zu zai xia qiu ji jian chen ji wu dui shang fu shui you yuan zhuai bian cheng wei hui ,er gai xian xiang zai you wai yuan zu ze chu xian yu qiu dong ji jian ,wai yuan shu ru yan chang le chen ji wu xiang shang fu shui ti shi lin shi chang yao 2ge yue ;shu jun cuo shi jiang di le de ni nei yuan lin shi fang tong liang ,ke you xiao kong zhi ji nei yuan lin shi fang ,zu jue wai yuan ke li wu shu ru dui shu jun kong zhi nei yuan lin fu he qi dao le jiao hao de cu jin zuo yong 。zeng shang suo shu ,ke li wu de chi xu lei ji dui shu jun xin sheng jie mian chan sheng yi ji lie fu xiao ying ,re bu cai qu cuo shi kong zhi wai yuan ke li wu de shu ru ,shu jun dui nei yuan lin fu he de kong zhi xiao guo nan yi shi xian chang xiao 。yin ci ,zai jin hang shu jun qian xu dui ke li wu de wu ran zhuang kuang jia yi diao cha yan jiu ,yi que ding shi fou neng gou kai zhan shu jun gong cheng 。
论文参考文献
论文详细介绍
论文作者分别是来自苏州科技大学的李鑫，发表于刊物苏州科技大学2019-09-18论文，是一篇关于太湖论文,疏浚论文,沉积物水界面论文,外源颗粒物输入论文,苏州科技大学2019-09-18论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自苏州科技大学2019-09-18论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：太湖论文; 疏浚论文; 沉积物水界面论文; 外源颗粒物输入论文; 苏州科技大学2019-09-18论文;