开发在线分析仪以满足具有挑战性的烟气脱硫废水中汞的新排放限制

IF 2 Q3 Environmental Science

Water Quality Research Journal of Canada Pub Date : 2023-10-11 DOI:10.2166/wqrj.2023.012

Shaun Lancaster, Warren T. Corns, Eva M. Krupp, Jörg Feldmann

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引用次数: 0

摘要

由于汞的毒性，人类向环境排放汞引起了人们的极大关注。煤的燃烧对汞的排放有很大贡献，因此，最近在美国提出了更低的烟气脱硫(FGD)废水中汞的排放限值。为满足最严格的放电限值10ng L−1，需要降低检测限。为此，本文研制了一种基于化学药剂注射结合金汞齐原子荧光光谱法在线监测烟气脱硫废水中汞的新方法。该仪器已根据国际标准方法ISO 17852进行了验证，并对FGD水中主要存在的极端盐含量进行了干扰研究。1.8 ng L−1的检出限以及在现场现场试验中的准确性能表明，该方法适合满足新的立法。

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Development of an online analyser to meet challenging new discharge limits for mercury in flue gas desulphurisation wastewater

Abstract Anthropogenic emissions of mercury to the environment are of great concern due to its toxicity. The burning of coal contributes highly to Hg emissions and, as such, much lower effluent discharge limits for Hg in flue gas desulphurisation (FGD) wastewater have recently been proposed in the USA. Lower detection limits are required to meet the most demanding discharge limit of 10 ng L−1. Therefore, in this work, a new analyser for online monitoring of Hg in FGD wastewater based on syringe injections of chemicals combined with gold amalgamation – atomic fluorescence spectrometry has been developed. The instrument has been validated against international standard method ISO 17852, as well as an interference study with extreme levels of salts majorly present in FGD water. Detection limits of 1.8 ng L−1 as well as accurate performance in an on-site field trial indicate that the methodology is fit to meet the new legislation.

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来源期刊

Water Quality Research Journal of Canada WATER RESOURCES-

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Water Quality Research Journal publishes peer-reviewed, scholarly articles on the following general subject areas: Impact of current and emerging contaminants on aquatic ecosystems Aquatic ecology (ecohydrology and ecohydraulics, invasive species, biodiversity, and aquatic species at risk) Conservation and protection of aquatic environments Responsible resource development and water quality (mining, forestry, hydropower, oil and gas) Drinking water, wastewater and stormwater treatment technologies and strategies Impacts and solutions of diffuse pollution (urban and agricultural run-off) on water quality Industrial water quality Used water: Reuse and resource recovery Groundwater quality (management, remediation, fracking, legacy contaminants) Assessment of surface and subsurface water quality Regulations, economics, strategies and policies related to water quality Social science issues in relation to water quality Water quality in remote areas Water quality in cold climates The Water Quality Research Journal is a quarterly publication. It is a forum for original research dealing with the aquatic environment, and should report new and significant findings that advance the understanding of the field. Critical review articles are especially encouraged.