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多重组合扰动对沉积物微界面环境的影响

ISSN号：1008-6706
期刊名称：《中国基层医药》
时间：0
分类：X131.2[环境科学与工程—环境科学]
作者机构：[1]苏州科技大学环境科学与工程学院,江苏苏州215009, [2]溧阳市环境监测站,江苏溧阳213399, [3]苏州科太环境技术有限公司,江苏苏州215011
相关基金：国家自然科学基金项目（51178284;51278523）;江苏省第四期“333”工程项目;江苏省“六大人才高峰”项目（2013-JNHB-022）

作者：蔡顺智[1], 胡琦[2], 钱少江[2], 黄振旭[3], 李大鹏[1]

关键词：多重, 组合扰动, 微界面环境, 河蚬, 铜绿微囊藻, multiple, combined disturbance, micro interface and environment, Corbicula fluminea, Microcystis aeruginosa

中文摘要：

为了阐明多重组合扰动因素对沉积物微界面环境的影响,以太湖梅梁湾沉积物为研究对象,采用Rhizon采样技术和微电极系统等手段,研究了扰动下微界面溶解氧渗透深度、pH、ORP、铁离子和含水率等变化规律。结果表明,藻类组（ES5）的OPD最大,达到了11.5 mm。不同扰动下对照组、摇蚊幼虫组、组合扰动组、河蚬组（或藻类）的p H剖面曲线趋势从左向右平移,而ORP剖面曲线从左往右的顺序分别是ES1、ES2、ES4、ES3、ES5组。河蚬组表层0～6 cm沉积物的平均含水率达到了61.68%,为各组最高。与组合扰动组相比,河蚬的出现降低了沉积物OPD,而藻类的出现进一步增大了沉积物OPD。同时,组合扰动下河蚬或藻类的出现进一步增大了沉积物p H。其次,组合扰动下河蚬的出现降低了沉积物ORP,而藻类的出现进一步增大沉积物ORP。除此之外,河蚬的出现还进一步增大了沉积物含水率和孔隙度,而藻类的出现对其并无显著性影响。

英文摘要：

In order to clarify the influence of multiple combined disturbance factors on the sediment micro interface and environment, the sediment of Meiliang Bay in Taihu Lake was studied as the major research object in this experiment. With the help of the Rhizon sampling technique, the Unisense microelectrode system and so on, this experiment was to research on the change regularities of OPD, pH, ORP, iron ions and water content of micro interface and environment under disturbance. The results indicated that algae group （ES5） had the largest OPD, reaching 11.5 ram. The pH profiles of ES1, ES2, ES3, ES5 and ES4 moved from left to right respectively under different disturbances. However, the sequence of ORP profiles from left to right was ES1, ES2, ES4, ES3 and ES5. The average water content of group ES4 in 0-6 cm sediment surface reached 61.68%, which was the highest among all groups. The appearance of Corbicula fluminea reduced OPD of sediment compared with combined disturbance. However, the appearance of algae increased OPD of sediment further. Meanwhile, the appearance of Corbicula fluminea or algae increased the pH of sediment further under combined disturbance. Next, the appearance of Corbicula fluminea reduced ORP of sediment and the appearance of algae increased ORP of sediment more under combined disturbance. In addition, the appearance of Corbicula fluminea still increased the water content and porosity of sediment further. But there was no significant effect with the appearance of algae.

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