| 沉降除藻协同沉积物覆盖对藻华水体甲烷释放的影响 |
| 摘要点击 1038 全文点击 384 投稿时间：2018-10-20 修订日期：2019-03-26 |
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| 中文关键词 甲烷 藻华 沉降除藻 沉积物覆盖 氧化还原电位 |
| 英文关键词 methane algal bloom algal sedimentation sediment capping redox potential |
| 作者 | 单位 | E-mail | | 朱琳 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044 | zhulin0510420@126.com | | 于江华 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044 | | | 施文卿 | 南京水利科学研究院生态环境研究中心, 南京 210029 | shiwenqing2005320@126.com | | 易齐涛 | 安徽理工大学地球与环境学院, 淮南 232001 | | | 曹华勇 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044 | | | 蒲寅羽 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044 | |
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| 中文摘要 |
| 本研究以藻华水体甲烷释放为对象，利用模拟柱培养实验，探究了沉降除藻和沉积物覆盖复合技术对富营养化甲烷释放的影响.结果表明，沉降除藻结合沉积物覆盖处理可有效改善水环境，实现对甲烷释放的控制，但不同覆盖材料的效果存在差异；活性炭效果要优于土壤和沸石.相比于对照体系水体溶解氧（DO）<2.5 mg·L-1和氧化还原电位（ORP）<100 mV，沉积物界面ORP<-125 mV，沉降除藻协同活性炭覆盖体系中水体DO和ORP分别升高至3.1 mg·L-1和174 mV，沉积物界面ORP逆转为168 mV，实验期间甲烷释放量相对于对照组减少90.2%.研究结果在富营养水体甲烷减排方面具有指导性意义. |
| 英文摘要 |
| This study tested a strategy in simulated column systems to control methane emissions from algal bloom waters using the combined technology of algae sedimentation and sediment capping. The results demonstrated that the synergy of algal sedimentation and sediment capping can effectively improve the water environment and reduce methane emissions; however, the improvement rate differed among capping materials. The use of activated carbon yielded better performance on the water environment improvement and methane emission control than soil and zeolite. Compared with the control system, the dissolved oxygen and redox potential in the water were increased from<2.5 mg·L-1 to 3.1 mg·L-1 and from<100 mV to 174 mV, respectively. In addition, the redox potential in the surface sediment was reversed from -125 mV to 168 mV after algal sedimentation with subsequent activated carbon capping. As a result, methane emissions in the algal sedimentation-activated carbon capping systems were decreased by 90.2% over the incubation period relative to the control system. This study provides useful insights into methane emission control in eutrophic waters. |
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