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首页> 外文期刊>Environmental Science and Pollution Research >Response of marine benthic fauna to thin-layer capping with activated carbon in a large-scale field experiment in the Grenland fjords, Norway
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Response of marine benthic fauna to thin-layer capping with activated carbon in a large-scale field experiment in the Grenland fjords, Norway

机译：挪威Grenland Fjords的大型田间实验中，海洋底栖动物的反应与活化碳的薄层封盖

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摘要

A field experiment with thin-layer capping was conducted in the Grenland fjords, Norway, for remediation in situ of mercury and dioxin-contaminated sediments. Experimental fields at 30 and 95 m depth were capped with (i) powdered activated carbon (AC) mixed with clay (AC+clay), (ii) clay, and (iii) crushed limestone. Ecological effects on the benthic community and species-feeding guilds were studied 1 and 14 months after capping, and a total of 158 species were included in the analyses. The results show that clay and limestone had only minor effects on the benthic community, while AC+clay caused severe perturbations. AC+clay reduced the abundance, biomass, and number of species by up to 90% at both 30 and 95 m depth, and few indications of recovery were found during the period of this investigation. The negative effects of AC+clay were observed on a wide range of species with different feeding strategies, although the suspension feeding brittle star Amphiura filiformis was particularly affected. Even though activated carbon is effective in reducing sediment-to-water fluxes of dioxins and other organic pollutants, this study shows that capping with powdered AC can lead to substantial disturbances to the benthic community.
机译：在Grenland Fjords，挪威进行了薄层封盖的田间实验，用于修复汞和二恶英污染的沉积物。用（i）与粘土（AC +粘土），（II）粘土和（III）碎石松混合的粉末状活性炭（AC）封装了30和95米深度的实验场。在封盖后1和14个月研究了对底栖群落和物种喂养公会的生态效应，分析中共有158种。结果表明，粘土和石灰石对底栖群落仅有次要影响，而AC +粘土则引起严重的扰动。 AC +粘土在30和95米深度下减少丰度，生物量和物种数量高达90％，并且在这次调查期间发现了很少的恢复症。在具有不同饲养策略的各种物种上观察到AC +粘土的负面影响，尽管悬浮喂养脆星Amphiura Filiformis特别受到影响。尽管活性炭有效减少二恶英和其他有机污染物的沉积物 - 水势态，但该研究表明，用粉末交流的封盖可能导致对底栖群落的大量紊乱。

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