Trace Metal Stream Contamination in a Post Peak Water Context: Lessons from the Cordillera Blanca, Peru,ACS Earth and Space Chemistry

当前位置： X-MOL 学术 › ACS Earth Space Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Trace Metal Stream Contamination in a Post Peak Water Context: Lessons from the Cordillera Blanca, Peru
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2020-03-06 , DOI: 10.1021/acsearthspacechem.9b00269
Alexandre Guittard ₁ , Michel Baraer ₁ , Jeffrey M. McKenzie ₂ , Bryan G. Mark ₃ , Alejo C. Rapre ₄ , Jeffrey Bury ₅ , Mark Carey ₆ , Kenneth R. Young ₇

Affiliation

As a result of climate warming and glacier recession, glacierized watersheds will experience a decrease in dry season discharge and an increase in wet season discharge, with negative consequences for water quality. The glacierized Rio Santa watershed in Peru provides a unique opportunity to study these concerns, because it drains the mountain range with the highest density of glaciers in the tropics. The mountain range has already passed peak water due to glacier retreat, and previous studies have reported high concentrations of dissolved trace metals in the Rio Santa. During summer 2013, 40 sites along the Rio Santa watershed were sampled for river bed sediments. In addition, water samples were collected at a single location in the Rio Santa over a period of 1 year. A sequential extraction was performed on the sediments and analyzed for Al, As, Cd, Fe, Pb, and Zn concentrations. Results show a chemostatic behavior of studied trace metals and present comparable distributions of metals among phases in the Rio Santa and its tributaries. These results suggest that at least a portion of the surface sediment contamination from trace metals originates from a transfer of primary particles from contaminated tributaries. In a post peak water context, this study implies that the increase in wet season discharge related to glaciers may represent a risk of contamination spread associated with sediment transport enhancement.

中文翻译：

高峰后水环境中的痕量金属流污染：秘鲁山脉山脉的教训

气候变暖和冰川退缩的结果是，冰川化的流域的旱季排放量将减少，而湿季排放量将增加，对水质产生不利影响。秘鲁的冰川圣塔里奥分水岭为研究这些问题提供了独特的机会，因为它排干了热带地区冰川密度最高的山脉。由于冰川的退缩，该山脉已经超过了最高水位，并且先前的研究已经报道了里约圣塔的高浓度溶解性痕量金属。在2013年夏季，对里约圣诞老人分水岭的40个地点采样了河床沉积物。此外，在一年的时间内，在里约热内卢的一个地点收集了水样。对沉积物进行顺序萃取并分析Al，As，镉，铁，铅和锌的浓度。结果表明，所研究的痕量金属具有化学稳定作用，并且在里约圣塔及其支流的各相之间具有可比的金属分布。这些结果表明，至少一部分来自痕量金属的表面沉积物污染源自污染物支流的一次颗粒的转移。在高峰后的水域中，这项研究表明与冰川有关的雨季排水量的增加可能代表着与沉积物迁移增强相关的污染物扩散的风险。这些结果表明，至少一部分来自痕量金属的表面沉积物污染源自污染物支流的一次颗粒的转移。在高峰后的水域中，这项研究表明与冰川有关的雨季排放量的增加可能代表着与沉积物迁移增强相关的污染物扩散的风险。这些结果表明，至少一部分来自痕量金属的表面沉积物污染源自污染物支流的一次颗粒的转移。在高峰后的水域中，这项研究表明与冰川有关的雨季排放量的增加可能代表着与沉积物迁移增强相关的污染物扩散的风险。

更新日期：2020-04-23

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11