引用本文:	蔡舒婕,李顺兴,蔡添寿,金东明.纳米TiO₂ 对海洋生源要素含量及威氏海链藻生长的影响[J].海洋科学,2012,36(5):53-56.

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纳米TiO₂ 对海洋生源要素含量及威氏海链藻生长的影响
蔡舒婕¹, 李顺兴^1,2, 蔡添寿¹, 金东明¹
1.漳州师范学院化学与环境科学系;2.漳州师范学院现代分离分析科学与技术福建省高校重点实验室

摘要:

探讨不同质量浓度纳米TiO₂(0, 4, 8, 12, 16, 20 mg/L)对海洋生源要素(N, P, Si, Fe)含量及威氏海链藻(Thalassiosira weissflogii)生长的影响。实验结果表明: 随纳米二氧化钛浓度增大, 对海洋生源要素的吸附率有不同程度的提高, 海洋生源要素含量下降, 对磷和铁的影响最为明显; 纳米二氧化钛吸附对氮磷比和硅磷比影响很大, 氮磷比为68~126, 硅磷比为74~135, 而对硅氮比影响很小基本维持在1。纳米二氧化钛对威氏海链藻生长有明显抑制, 并存在剂量—效应关系, 与海洋生源要素含量影响存在相关性。

关键词: 纳米二氧化钛海洋生源要素海洋生态毒理学硅藻纳米污染

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基金项目:国家自然科学基金资助项目(40506020; 20977074;21175115); 教育部新世纪优秀人才支持计划资助项目( 教技函[2011]95号); 福建省杰出青年基金项目(2010J06005)

Influence of nanometer size titanium dioxide on the content of marine biogenic elements and the growth of Thalassiosira weissflogii

Abstract:

The influences of the concentrations of nanometer size TiO₂ (0, 4, 8, 12, 16, 20 mg/L) on the content of marine biogenic elements (N, P, Si, Fe) and the growth of Thalassiosira weissflogii were investigated. The results showed that with the increase of the TiO₂ concentration, the contents of marine biogenic elements were all decreased and the adsorption ratios were all increased. The influences of TiO₂ addition on the content of P and Fe were more significant than those on N and Si. The TiO₂ adsorption significantly affected the N/P and the Si/P ratios, but not much on Si/N ratio. The N/P and Si/P ratios were varied obviously, ranging from 68 to 126, and 74 to 135, respectively, while Si/N ratio was kept at 1. The nanometer size TiO₂ could inhibite the growth of T. weissflogii concentration-dependently, which has relationship with the variations of marine biogenic element contents.

Key words: nanometer size TiO2 marine biogenic element marine ecological toxicology diatom Nano-pollution