改性粘土辅助沉水植物修复技术维持清水稳态的原位研究
In situ study on the maintenance of clear water by restoration of submersed macrophytes with the aid of modified soils
查看参考文献33篇
文摘
|
在富营养湖泊治理实践中,修复沉水植被被认为是改善水质的长效措施,而壳聚糖改性粘土是短期快速改善水质的有效手段.本研究利用改性粘土辅助沉水植被修复,旨在探索改善水质的长效方案.2011年511月在太湖梅梁湾开展了四组不同处理(对照、水草、水草+粘土、粘土)围隔实验,在水草(盖度13.0%)和水草+粘土(盖度52.3%)围隔中不同程度重建了苦草群落.实验期内每3d一次的水质监测表明,粘土处理可显著改善水质,水体总氮(TN)、总磷(TP)、正磷酸盐(PO_4~(3-)-P)和叶绿素a(Chl.a)含量分别比对照下降了20.7%、74.6%、31.0%和80.4%,透明度(SD)升高了90.4%;粘土辅助植被修复改善水质效果最长稳,水体TN、TP、PO_4~(3-)-P和Chl.a含量分别比对照下降了36.2%、64.0%、28.6%和71.1%,SD升高了76.4%;低盖度苦草群落单独处理对水质改善效果不显著.在三种处理中,粘土辅助植被修复改善底质效果最好,使间隙水的TN、TP、PO_4~(3-)-P、NH_4~+-N分别比实验前下降了15.6%、61.7%、55.8%和82.8%.本研究表明改性粘土辅助沉水植被修复可作为重富营养水体中水质改善的整合技术,但其长期生态效应仍需谨慎评估. |
其他语种文摘
|
Restoration of submersed vegetation is generally considered as an effective long-term approach to improve the water quality of eutrophic lakes, and chitosan-modified soil has been used to rapidly improve the water quality in the recent years. In this study, an experiment with four treatments(the control, submersed macrophyte, submersed marcophyte+soil, and soil) was carried out in the hypereutrophic water(Meiliang Bay) in Lake Taihu during May to December in 2011, with the aim to develop a macrophyte-mediated approach to improve water quality. During the period of the experiment, submersed vegetation had a final coverage of 13.0% and 52.3% in the submersed macrophyte and the submersed macrophyte+soil treatments, respectively. The indices of water quality were measured in 3-day intervals. The results showed that the soil was effective to improve the water quality, with a decrease in the contents of TP by 74.6%, TN by 20.7%, PO_4~(3-)-P by 31.0%, Chl.a by 80.4% and an increased SD by 90.4% as compared to the control; the submersed marcophyte+soil treatment was the most effective way to decrease the contents of TP(64.0%), TN(36.2%), PO_4~(3-)-P(28.6%) and Chl.a(71.1%), and increased the SD(76.4%). The submersed marcophyte restoration alone did not improve the water quality. The submersed marcophyte+soil treatment was also the most effective one among the three treatments to decrease the contents of TN(15.6%), TP(61.7%), PO_4~(3-)-P(55.8%) and NH_4~+--N(82.8%) in the sediment interstitial water. The study implies that restoration of submersed vegetation with the aid of chitosan-modified soil be an effective technology to improve the water quality, although the effectiveness needs to be further evaluated on a long-term basis. |
来源
|
湖泊科学
,2013,25(1):16-22 【核心库】
|
DOI
|
10.18307/2013.0103
|
关键词
|
富营养化水体
;
苦草
;
壳聚糖改性粘土
;
沉水植被修复
;
水质改善
|
地址
|
1.
华中农业大学水产学院, 武汉, 430070
2.
中国科学院水生生物研究所东湖台站, 武汉, 430072
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
1003-5427 |
学科
|
环境科学基础理论 |
基金
|
国家973计划
;
国家重大科技专项
|
文献收藏号
|
CSCD:4752836
|
参考文献 共
33
共2页
|
1.
谢平. 微囊藻毒素对人类健康影响相关研究的回顾.
湖泊科学,2009,21(5):603-613
|
被引
43
次
|
|
|
|
2.
Orth R J. Chesapeake Bay: an unprecedented decline in submerged aquatic vegetation.
Science,1983,222:51-53
|
被引
11
次
|
|
|
|
3.
Moss B. Engineering and biological approaches to the restoration from eutrophication of shallow lakes in which aquatic plant communities are important components.
Hydrobiologia,1990,200/201(1):367-377
|
被引
57
次
|
|
|
|
4.
Scheffer M.
Ecology of shallow lakes,1998:20-234
|
被引
1
次
|
|
|
|
5.
秦伯强. 浅水湖泊生态系统恢复的理论与实践思考.
湖泊科学,2005,17(1):9-16
|
被引
71
次
|
|
|
|
6.
古滨河. 美国Apopka湖的富营养化及其生态恢复.
湖泊科学,2005,17(1):1-8
|
被引
19
次
|
|
|
|
7.
Qiu D G. The restoration of aquatic macrophytes for improving water quality in a hypertrophic shallow lake in Hubei Province, China.
Ecological Engineering,2001,18:147-156
|
被引
1
次
|
|
|
|
8.
Morris K. Domain shifts in the aquatic vegetation of shallow urban lakes: The relative roles of low light and anoxia in the catastrophic loss of the submerged angiosperm Vallisneria americana.
Marine & Freshwater Research,2004,55:749-758
|
被引
4
次
|
|
|
|
9.
Anderson D M. Turning back the harmful red tide.
Nature,1997,388:513-514
|
被引
140
次
|
|
|
|
10.
邹华. 壳聚糖改性粘土对水华优势藻铜绿微囊藻的絮凝去除.
环境科学,2004,25(6):40-43
|
被引
47
次
|
|
|
|
11.
Pan G. In-lake algal bloom removal and submerged vegetation restoration using modified local soils.
Ecological Engineering,2011,37:302-308
|
被引
21
次
|
|
|
|
12.
Zou H. Removal of cyanobacterial blooms in Lake Taihu using local soils. II. Effective removal of Microcystis aeruginosa using local soils and sediments modified by chitosan.
Environmental Pollution,2006,141:201-205
|
被引
48
次
|
|
|
|
13.
Pan G. Removal of harmful cyanobacterial blooms in Taihu Lake using local soils. III. Factors affecting the removal efficiency and an in situ field experiment using chitosan-modified local soils.
Environmental Pollution,2006,141(2):206-212
|
被引
34
次
|
|
|
|
14.
胡志新. 太湖梅梁湾生态系统健康状况周年变化的评价研究.
生态学杂志,2005,24(7):364-368
|
被引
2
次
|
|
|
|
15.
Divakaran R. Flocculation of kaolinite suspensions in water by chitosan.
Water Research,2001,35(16):3904-3908
|
被引
22
次
|
|
|
|
16.
黄祥飞.
湖泊生态调查观测与分析,2000
|
被引
109
次
|
|
|
|
17.
国家环境保护总局.
水和废水监测分析方法:第4版,2002:88-438
|
被引
1
次
|
|
|
|
18.
Swartzen-Allen S L. Surface and colloid chemistry of clays.
Chemical Review,1974,74(3):385-400
|
被引
13
次
|
|
|
|
19.
高咏卉. 有机改性黏土对海水中营养盐及主要水质因子的影响.
海洋科学,2007,31(8):30-37
|
被引
4
次
|
|
|
|
20.
Strand S P. Efficiency of chitosans applied for flocculation of different bacteria.
Water Research,2002,36:4745-4752
|
被引
14
次
|
|
|
|
|