Advanced Water Management Centre, The University of Queensland, St. Lucia, Qld, Australia.
Mar Pollut Bull. 2010 Jul;60(7):1113-6. doi: 10.1016/j.marpolbul.2010.03.027. Epub 2010 Apr 20.
Wastewater effluent is known to contain macro and micropollutants, which may be deleterious to environmental health. One such class of micropollutants is chelated gadolinium, which are used as MRI contrast agents. As these MRI contrast agents can be assumed to behave conservatively during estuarine mixing, it is possible to calculate how much wastewater is represented in any particular sample. In this study, the percentage contribution of wastewater at specific locations in Moreton Bay, Qld, were determined by calculating the additional anthropogenic gadolinium contribution to the total rare earth element concentrations. Wastewater contributions were measured at concentrations as low as 0.2%, demonstrating the applicability of this technique for wastewater effluent plume mapping.
污水废水中含有大量的污染物和微量污染物，这些污染物可能对环境健康有害。其中一类微量污染物是螯合型钆，它被用作磁共振成像（MRI）造影剂。由于这些 MRI 造影剂在河口混合过程中可以被认为是保守的，因此可以计算出任何特定样品中含有多少废水。在这项研究中，通过计算总稀土元素浓度中人为添加的钆的比例，确定了昆士兰州莫尔顿湾特定地点的污水的百分比贡献。污水的贡献浓度低至 0.2%，证明了该技术在污水排放羽流测绘中的适用性。
