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Sargassum contamination and consequences for downstream uses: a review
Journal of Applied Phycology ( IF 2.8 ) Pub Date : 2020-11-17 , DOI: 10.1007/s10811-020-02250-w
Damien A. Devault , Ronan Pierre , Hélène Marfaing , Franck Dolique , Pascal-Jean Lopez

Sargassum spp. are brown algae present in the tropical and subtropical waters of the world’s oceans. Benthic or pelagic, Sargassum spp. represent substantial amounts of biomass when drifted and massive beaching events also named “golden tides” are challenging for environmental and tourism managers. The Sargassum spp. biomass can be regarded as offering economic opportunities; however, micropollutant contamination counteracts this wealth. This review describes the contaminant uptake processes and the concentrations reached by various Sargassum species in regard to national and international norms for a variety of applications. Amongst the heavy metals, perhaps total arsenic content is the most salient: phytoaccumulation of arsenic is due to confusion in the phosphate transporter between arsenic and phosphate, thus leading Sargassum spp. to bioaccumulate arsenic actively. The levels reached could well give cause for concern across all potential applications, in particular for human and animal use. Similarly, there are concerns for the widespread applications or disposal of this biomass due to environmental impacts in the case of storage, landfill or composting. Organic micropollutants are too rarely studied to assert that there is global contamination. However, research studies focused on Sargassum spp. contamination confirmed environmental threats. But, without exhaustive analysis of routine algae contamination, the standard contamination level cannot be defined. Treating beach-cast or drifting Sargassum spp. as a waste is a Gordian knot, in that it involves investment, work and disposal surfaces, whilst not necessarily providing environmental and economic gains. However, Sargassum spp. are a raw material, a resource rich in a broad variety of constituents that could be processed for commercial applications or which could be used for production of energy. In this paper the authors review the diverse applications that can be considered and describe the relevant regulations and norms related to contaminants and effluents that need to be taken into account. However, if valorizing Sargassum spp. is currently valuable and promising, the quality of the raw material is a key starting point because fresh and sand-free algae are required: offshore gathering solutions need to be developed in order to limit Sargassum sp. contamination by pollutants from land so as to hinder algae decay.



中文翻译:

海藻的污染及其对下游用途的影响:综述

海藻属 是存在于世界海洋的热带和亚热带水域中的褐藻。底栖或中上生,Sargassum spp。代表漂流时大量的生物量,大规模的滩涂事件也被称为“黄金潮”,这对环境和旅游业管理者构成挑战。在马尾藻属。生物质可被视为提供经济机会;但是,微污染物污染抵消了这一财富。这篇评论描述了污染物吸收过程以及各种Sargassum所达到的浓度有关国家和国际规范的各种物种。在重金属中,总砷含量可能是最重要的:砷的植物蓄积是由于砷和磷酸盐之间的磷酸盐转运蛋白混淆,从而导致了羊栖菜属。积极地生物积累砷。达到的水平很可能引起所有潜在应用的关注,尤其是在人类和动物用途上。同样,由于在储存,垃圾掩埋或堆肥的情况下对环境的影响,这种生物质的广泛应用或处置也令人担忧。很少研究有机微污染物,不能断言存在全球性污染。但是,研究主要集中在Sargassumspp。污染证实了环境威胁。但是,如果不对常规藻类污染进行详尽分析,就无法确定标准污染水平。治疗滩涂或漂流的Sargassum spp。作为废物是一个戈尔迪式的结,因为它涉及投资,工作和处置方面,但不一定带来环境和经济利益。然而,Sargassumspp。是一种原材料,是一种富含多种成分的资源,可以加工用于商业应用或用于生产能源。在本文中,作者回顾了可以考虑的各种应用,并描述了与污染物和废水有关的相关法规和规范。但是,如果要重整Sargassum spp。由于需要新鲜和无沙的藻类,因此原料的质量是目前有价值且很有前途的原料,因此它的质量是关键的起点:需要开发海上捕捞解决方案以限制Sargassum sp。来自陆地污染物的污染,以阻止藻类腐烂。

更新日期:2020-11-18
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