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题名: Impacts of residual aluminum from aluminate flocculant on the morphological and physiological characteristics of Vallisneria natans and Hydrilla verticillata
作者: Lin, Qing-Wei1, 2; He, Feng1; Ma, Jian-Min3; Zhang, Yi1; Liu, Bi-Yun1; Min, Fen-Li1, 2; Dai, Zhi-Gang1; Zhou, Qiao-Hong1; Wu, Zhen-Bin1
关键词: Hydrilla verticillata ; Morphological characteristics ; Phytotoxic effect ; Physiological characteristics ; Residual aluminum ; Vallisneria natans
刊名: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
发表日期: 2017-11-01
DOI: 10.1016/j.ecoenv.2017.07.037
卷: 145, 页:266-273
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences ; Toxicology
研究领域[WOS]: Environmental Sciences & Ecology ; Toxicology
英文摘要: Aluminate is generally used as a flocculent in water and wastewater treatment processes, but the residual aluminum (Al) may have toxic effects on aquatic organisms when the concentration accumulates beyond a threshold level. The in situ and laboratory tests were conducted to evaluate the impact of residual Al on submerged macrophytes in West Lake, Hangzhou, China, which receives Al flocculant-purified water diverted from the Qiantang River. The responses of Vallisneria natans and Hydrilla verticillata were investigated based on their morphological and physiological parameters in pot culture and aquarium simulation experiments. In the pot culture experiments, the biomass, seedling number, plant height, stolon number, stolon length, and root weight were significantly higher at a site located 150 m from the inlet compared with those at a site located 15 m from the inlet (P < 0.05), thereby indicating that the residual Al significantly inhibited the morphological development of V. natans and H. verticillata. The variations in the chlorophyll-a, protein, and malondialdehyde contents of the two species in both the pot culture and aquarium simulation experiments also demonstrated that the two submerged macrophytes were stressed by residual Al. V. natans and H. verticillata accumulated 0.052-0.227 mg of Al per gram of plant biomass (fresh weight, mg/g FW) and 0.045-0.205 mg Al/g FW in the in situ experiments, respectively, where the amounts of Al were significantly higher in the plants in the treatment aquaria during the laboratory experiments than those in the controls. These results may have important implications for the restoration of submerged macrophytes and ecological risk assessments in Al-exposed lakes. It is recommended that the Al salt concentration used for the control of lake eutrophication should be reduced to an appropriate level.
关键词[WOS]: ACID SOILS ; TOLERANCE ; WATER ; PHOSPHORUS ; REMOVAL ; GROWTH ; PLANTS ; PERFORMANCE ; MECHANISMS ; EFFICIENCY
语种: 英语
项目资助者: Major Science and Technology Program for Water Pollution Control and Treatment in China's 12th Five-Year Plan(2012ZX07101007-005) ; Chinese Academy of Sciences(KFZD-SW-302-02)
WOS记录号: WOS:000411917100034
ISSN号: 0147-6513
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/35178
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Henan Normal Univ, Sch Life Sci, Xin Xiang 453007, Peoples R China
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