Managing taste and odour metabolite production in drinking water reservoirs: The importance of ammonium as a key nutrient trigger.
Managing taste and odour metabolite production in drinking water reservoirs: The importance of ammonium as a key nutrient trigger.
复制标题
DOI：
10.1016/j.jenvman.2019.04.123
复制
发表时间：
2019-08
影响因子：
8.7
通讯作者：
R. Perkins;E. Slavin;T. C. Andrade;C. Blenkinsopp;P. Pearson;T. Froggatt;G. Godwin;J. Parslow;S. Hurley;R. Luckwell;D. Wain
中科院分区：
文献类型：
--
作者：
R. Perkins;E. Slavin;T. C. Andrade;C. Blenkinsopp;P. Pearson;T. Froggatt;G. Godwin;J. Parslow;S. Hurley;R. Luckwell;D. Wain
饮用水中的味道和气味（T&O）化合物（最常见的是2-MIB和土臭素）正在成为水管理的一个日益全球性的问题。在此，2015年至2016年期间，通过详细的水样分析，对Plas Uchaf水库（英国北威尔士）中2-MIB和土臭素产生的触发因素进行了研究。使用自组织映射（SOM）分析，对该水库和萨默塞特（英格兰，英国）4个水库的历史提取数据进行了统计学比较。水库内测量（2015-2016年）显示，来自主要外部负荷源的铵减少了85%，导致2-MIB和土臭素浓度降低，2-MIB的峰值浓度从60 ng l − 1降至21 ng l− 1，土臭素从140 ng l − 1降至18 ng l−1。没有其他测量的水化学参数显示出显着差异。SOM结果支持水库内的调查结果，揭示了2-MIB和土臭素与所有5个水库中相对于硝酸盐的高铵相关。我们得出结论，铵是刺激蓝藻生产力和生产的T&O化合物的关键。虽然这是众所周知的，需要足够的可用性磷蓝藻的快速增长，因此仍应考虑在管理决策中，我们建议，监测来源和浓度的铵是关键管理T&O爆发饮用水水库。
Taste and odour (T&O) compounds (most commonly 2-MIB and Geosmin) in drinking water are becoming an increasingly global problem for water management. Here, the trigger(s) for 2-MIB and Geosmin production were investigated in Plas Uchaf reservoir (North Wales, UK) with detailed water sample analysis between 2015 and 2016. Historical abstraction data from this reservoir and 4 reservoirs in Somerset (England, UK) were compared statistically using Self-Organising Map (SOM) analysis. In-reservoir measurements (2015–2016) revealed an 85% reduction in ammonium from the primary external loading source led to lower 2-MIB and Geosmin concentrations, with peak concentrations of 2-MIB declining from 60 to 21 ng l−1and Geosmin declining from 140 to 18 ng l−1. No other measured water chemistry parameter showed a significant difference between years. The SOM results support the in-reservoir findings, revealing 2-MIB and Geosmin to be associated with high ammonium relative to nitrate for all 5 reservoirs. We conclude that ammonium is key for stimulating cyanobacterial productivity and production of T&O compounds. Whilst it is well understood that adequate availability of phosphorus is required for rapid growth in cyanobacteria, and hence should still be considered in management decisions, we suggest that monitoring sources and concentrations of ammonium is key for managing T&O outbreaks in drinking water reservoirs.