气候变化领域集成服务门户(CCPortal): Using yeast to sustainably remediate and extract heavy metals from waste waters

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DOI	10.1038/s41893-020-0478-9
	Using yeast to sustainably remediate and extract heavy metals from waste waters
	Sun G.L.; Reynolds E.E.; Belcher A.M.
发表日期	2020
ISSN	2398-9629
起始页码	303
结束页码	311
卷号	3 期号:4
英文摘要	Our demand for electronic goods and fossil fuels has challenged our ecosystem with contaminating amounts of heavy metals, causing numerous water sources to become polluted. To counter heavy-metal waste, industry has relied on a family of physicochemical processes, with chemical precipitation being one of the most commonly used. However, the disadvantages of chemical precipitation are vast, including the generation of secondary waste, technical handling of chemicals and need for complex infrastructures. To circumvent these limitations, biological processes to naturally manage waste have been sought. Here, we show that yeast can act as a biological alternative to traditional chemical precipitation by controlling naturally occurring production of hydrogen sulfide (H2S). Sulfide production was harnessed by controlling the sulfate assimilation pathway, where strategic knockouts and culture conditions generated H2S from 0 to over 1,000 ppm (~30 mM). These sulfide-producing yeasts were able to remove mercury, lead and copper from real-world samples taken from the Athabasca oil sands. More so, yeast surface display of biomineralization peptides helped control for size distribution and crystallinity of precipitated metal sulfide nanoparticles. Altogether, this yeast-based platform not only removes heavy metals but also offers a platform for metal re-extraction through precipitation of metal sulfide nanoparticles. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	Biomineralization; Crystallinity; Extraction; Fossil fuels; Heavy metals; Indicators (chemical); Metal nanoparticles; Oil sands; Photobiological hydrogen production; Sulfur compounds; Yeast; Athabasca oil sands; Chemical precipitation; Complex infrastructures; Metal sulfide nanoparticles; Naturally occurring; Physicochemical process; Production of hydrogen; Yeast surface displays; Precipitation (chemical)
来源期刊	Nature Sustainability
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/163505
作者单位	Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Koch Institute of Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Material Science, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Sun G.L.,Reynolds E.E.,Belcher A.M.. Using yeast to sustainably remediate and extract heavy metals from waste waters[J],2020,3(4).
APA	Sun G.L.,Reynolds E.E.,&Belcher A.M..(2020).Using yeast to sustainably remediate and extract heavy metals from waste waters.Nature Sustainability,3(4).
MLA	Sun G.L.,et al."Using yeast to sustainably remediate and extract heavy metals from waste waters".Nature Sustainability 3.4(2020).