Biology in focus: better lives through better science: new hope for acid streams

1998 ◽  
Author(s):  
Barnaby Watten
Keyword(s):  
The Analyst ◽  
2018 ◽  
Vol 143 (5) ◽  
pp. 1188-1196 ◽  
Author(s):  
Gilbert L. Nelson ◽  
Amanda M. Lines ◽  
Amanda J. Casella ◽  
Job M. Bello ◽  
Samuel A. Bryan

To simplify and improve the safety of reprocessing nuclear fuel, the Micro-Raman technique was applied at the microfluidic scale with a view toward the on-line spectroscopic measurement of radioactive solutions.


1988 ◽  
Vol 23 (3) ◽  
pp. 1267-1271 ◽  
Author(s):  
Colin R. Townsend ◽  
Alan G. Hildrew

1991 ◽  
Vol 55 (3-4) ◽  
Author(s):  
N.S. Weatherley ◽  
G.P. Rutt ◽  
S.P. Thomas ◽  
S.J. Ormerod

2002 ◽  
Vol 59 (9) ◽  
pp. 1563-1573 ◽  
Author(s):  
Olivier Dangles

Functional plasticity of benthic macroinvertebrates was investigated over one year in four acid streams in the Vosges Mountains (northeastern France). The trophic position of macroinvertebrate species within the benthic food web was determined using gut content analyses. Diet analyses revealed that only 24–36% of biomass of putative shredders consumed leaf fragments, whereas up to 44% consumed benthic algae and bryophytes. Although most Nemouromorpha stoneflies were generalist consumers, several other taxa (e.g., Brachyptera seticornis, Chaetopterygopsis maclachlani) specialised on benthic algae and bryophytes. Our study showed that acid streams unexpectedly had very few specialised leaf-shredding species (e.g., Chaetopteryx villosa) that could explain the slow leaf detritus processing rates observed in these systems. Primary producers appear to be an alternative resource for shredders, playing an important role in supporting food webs in forested acid streams. The food web built in this study suggests that overlooking species-specific functional plasticity of invertebrates may result in a misconception of invertebrate community structure in acid streams.


1979 ◽  
Vol 12 (1) ◽  
pp. 61-74 ◽  
Author(s):  
L. Rasmussen ◽  
K. Sand-Jensen

2016 ◽  
Vol 74 (2) ◽  
pp. 367-374 ◽  
Author(s):  
Bárbara C. Ricci ◽  
Carolina D. Ferreira ◽  
Larissa S. Marques ◽  
Sofia S. Martins ◽  
Míriam C. S. Amaral

This work assessed the potential of nanofiltration (NF) and reverse osmosis (RO) to treat acid streams contaminated with metals, such as effluent from the pressure oxidation process (POX) used in refractory gold ore processing. NF and RO were evaluated in terms of rejections of sulfuric acid and metals. Regarding NF, high sulfuric acid permeation (∼100%), was observed, while metals were retained with high efficiencies (∼90%), whereas RO led to high acid rejections (<88%) when conducted in pH values higher than 1. Thus, sequential use of NF and RO was proved to be a promising treatment for sulfuric acid solutions contaminated by metals, such as POX effluent. In this context, a purified acid stream could be recovered in NF permeate, which could be further concentrated in RO. Recovered acid stream could be reused in the gold ore processing or commercialized. A metal-enriched stream could be also recovered in NF retentate and transferred to a subsequent metal recovery stage. In addition, considering the high acid rejection obtained through the proposed system, RO permeate could be used as recycling water.


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