This work is the first extensive study on the removal of carbon monoxide from polluted air in biofilters. It compares the performance of two packing materials, namely lava rock alone and a mixture of peat and lava rock. The results show that the biofilter packed with the mixture of peat and lava rock performed much better than the other one. The effect of operating conditions as, among others, the inlet concentration and the empty bed residence time (EBRT) were studied. A maximum elimination capacity of 33 g m(-3) h(-1) was obtained with the mixed packing with more than 85% removal efficiency at EBRT of 3 min or more. Somewhat lower performances were reached at shorter EBRT. The results presented here suggest that the mixture of lava rock and peat, subject to further optimization, offers potential for the biological removal of CO from polluted gas streams.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2008.10.001 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Machine-learning crystal size distribution for volcanic stratigraphy correlation.
Sci Rep
December 2024
Centre for Ore Deposit and Earth Sciences, School of Natural Sciences, University of Tasmania, Hobart, Australia.
Volcanic stratigraphy reconstruction is traditionally based on qualitative facies analysis complemented by geochemical analyses. Here we present a novel technique based on machine learning identification of crystal size distribution to quantitatively fingerprint lavas, shallow intrusions and coarse lava breccias. This technique, based on a simple photograph of a rock (or core) sample, is complementary to existing methods and allows another strategy to identify and compare volcanic rocks for stratigraphic correlation.
View Article and Find Full Text PDFLocal administration of immunotherapy for patients with skin cancer: A systematic review.
Cancer Treat Rev
December 2024
Department of Medical Oncology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands; Department of Radiology & Nuclear Medicine, Erasmus MC, University Medical Center, Rotterdam, the Netherlands. Electronic address:
Since the introduction of immune checkpoint inhibitors (ICIs) targeting PD-1 and CTLA-4 receptors, survival has improved significantly for patients with irresectable and metastatic skin cancer, including cutaneous squamous cell cancer and melanoma. However, systemic administration of these drugs is associated with immune related adverse events (irAEs), which can be severe, irreversible and even fatal. To reduce the risk of irAEs associated with systemic exposure to immunotherapeutic drugs, local administration of low doses could be considered.
View Article and Find Full Text PDFNeoantigen-specific cytotoxic Tr1 CD4 T cells suppress cancer immunotherapy.
Nature
August 2024
Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.
CD4 T cells can either enhance or inhibit tumour immunity. Although regulatory T cells have long been known to impede antitumour responses, other CD4 T cells have recently been implicated in inhibiting this response. Yet, the nature and function of the latter remain unclear.
View Article and Find Full Text PDFEvidence for the formation of silicic lava by pyroclast sintering.
Nat Commun
June 2024
Earth Science, Durham University, Science Labs, Durham, DL1 3LE, UK.
Article Synopsis
- Silicic lavas form from the sintering of pyroclasts beneath the surface and are eventually released from volcanic vents; this has been studied at Hrafntinnuhryggur in Iceland.
- The evidence includes a pumice lapilli tuff deposit that transitions to dense obsidian, with observed textural variations indicating different levels of gas release and conduit blockage.
- These findings support the 'cryptic fragmentation model' for understanding how effusive silicic volcanism occurs and how it relates to the conduit system and eruptive deposits.
Atmospheric dispersal shapes rapid bacterial colonization of Icelandic Lava Rocks.
FEMS Microbes
May 2024
Faculty of Food Science and Nutrition, University of Iceland, Sæmundargatu 2, 102 Reykjavík, Iceland.
Microorganisms released into the atmosphere by various disturbances can travel significant distances before depositing, yet their impact on community assembly remains unclear. To address this, we examined atmospheric and lithospheric bacterial communities in 179 samples collected at two distinct Icelandic volcanic sites: a small volcanic island Surtsey, and a volcanic highland Fimmvörðuháls using 16S rRNA amplicon sequencing. Airborne microbial communities were similar between sites while significant differences emerged in the communities on lava rocks after 1-year exposure.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!