UWA School of Agriculture and Environment, The University of Western Australia, .
Environ Sci Pollut Res Int. 2018 Feb;25(6):5386-5392. doi: 10.1007/s11356-017-0846-9. Epub 2017 Dec 5.
Laboratory desorption behaviour, function and elemental composition of commercially marketed silicate minerals used to sequester phosphorus pollution as well as Zeolite, Smectite, and Kaolinite were determined to see whether their use by environmental scientists and water managers in eutrophic waterways has the potential to contribute to longer-term environmental impacts. As expected, lower phosphorus concentrations were observed, following treatment. However, data relating to desorption, environmental fate and bioavailability of phospho-silicate complexes (especially those containing rare earth elements) appear to be underrepresented in product testing and trial publications. Analysis of desorption of phosphate (P) was > 5 μg[P]/L for all three non-commercial samples and 0 > μg[P]/L > 5 for all commercial silicates for a range of concentrations from 0 to 300 μg[P]/L. Based on a review of bioaccumulation data specific to the endangered Cherax tenuimanus (Hairy Marron) and other endemic species, this is significant considering anything > 20 μg[La]/L is potentially lethal to the hairy marron, other crustaceans and even other phyla. Where prokaryotic and eukaryotic effects are underreported, this represents a significant challenge. Especially where product protocols recommend continual reapplication, this is significant because both the forward and reverse reactions are equally important. The users of silicate minerals in water columns should accept the dynamic nature of the process and pay equal attention to both adsorption and desorption because desorption behaviour is an inherent trait. Even if broader desorption experimentation is difficult, expensive and time-consuming, it is a critical consideration nonetheless.
研究了商业销售的用于隔离磷污染的硅酸盐矿物以及沸石、蒙脱石和高岭石的实验室解吸行为、功能和元素组成，以了解环境科学家和水管理人员在富营养化水道中使用这些物质是否有可能对环境产生长期影响。正如预期的那样，处理后观察到较低的磷浓度。然而，关于磷-硅酸盐络合物（特别是那些含有稀土元素的络合物）的解吸、环境归宿和生物可利用性的数据在产品测试和试验出版物中似乎代表性不足。对于 0 到 300μg[P]/L 的一系列浓度，所有三种非商业样品的磷酸盐（P）解吸分析均> 5μg[P]/L，所有商业硅酸盐的解吸分析均为 0 > μg[P]/L > 5。基于对濒危 Cherax tenuimanus（Hairy Marron）和其他特有物种的生物累积数据的审查，这是非常重要的，因为任何> 20μg[La]/L 的物质对 hairy marron、其他甲壳类动物甚至其他门都是潜在致命的。在没有报告原核和真核生物效应的情况下，这是一个重大挑战。特别是在产品方案建议持续重新应用的情况下，这是非常重要的，因为正向和反向反应同样重要。水柱状硅酸盐矿物的使用者应该接受这个过程的动态性质，并平等关注吸附和解吸，因为解吸行为是固有的特征。即使更广泛的解吸实验更困难、昂贵和耗时，它仍然是一个关键的考虑因素。
