Activated carbon filters for filtration–adsorption

Choque

et al. 2018

Toxins

Ochratoxin A (OTA) is a mycotoxin produced by several species of Aspergillus and Penicillium that contaminate food and feed raw materials. To reduce OTA contamination, we first tested in vitro, actinobacterial strains as potential biocontrol agents and afterward, through a physical decontamination method using activated carbon fibers (ACFs). Actinobacterial strains were screened for their ability to reduce OTA in solid co-culture with A. carbonarius, which is the major OTA-producing species in European vineyards. Four strains showed a high affinity for removing OTA (67%–83%) with no significant effect on fungal growth (<20%). The mechanism of action was first studied by analyzing the expression of OTA cluster genes (acOTApks, acOTAnrps, acOTAhal) by RT-qPCR showing a drastic reduction in all genes (7–15 times). Second, the ability of these strains to degrade OTA was assessed in vitro on ISP2 solid medium supplemented with OTA (100 µg/L). Two strains reduced OTA to undetectable levels. As for the physical method, high adsorption rates were obtained for ACFs at 0.8 g/L with a 50% adsorption of OTA in red wine by AC15 and 52% in grape juice by AC20 within 24 h. These promising methods could be complementarily applied toward reducing OTA contamination in food chains, which promotes food safety and quality.

Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

OTA Prevention and Detoxification by Actinobacterial Strains and Activated Carbon Fibers: Preliminary Results

Choque

et al. 2018

Toxins

“…Furthermore, not only porosity, but also the surface functionality can determine the specificity of ACs [13,14]. The consumption and the potential applications of ACs are continuously increasing in the world scale economic prospective [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Some Process Parameters on the Main Properties of Activated Carbon Produced from Peat in a Lab-Scale Process

Bergna

Prokkola

et al. 2019

Waste Biomass Valor

Activated carbons (ACs) are widely used in different industrial processes as adsorbents for pollutant removal or as catalytic material support. The parameters and methods of activation can vary, and they affect the final characteristics of ACs, e.g., specific surface area, pore size distribution, and surface functional groups. The results of this study show that microporosity and mesoporosity can be modified, variating these parameters. ACs from Northern Finland Region peat have been prepared through physical activation with steam. The process has been evaluated using the design of experiment approach. Different parameters have been considered as factors, including holding time, oven temperature, heating rate, steam flow, nitrogen flow, kiln rotation, and biomass initial mass. Based on these factors, several responses characterizing the porosity and the elemental analysis of ACs have been selected. All the data collected have been processed statistically using the Fractional Factorial Resolution IV design linear model in a screening configuration fitted with a partial least squares regression using MODDE 9.1 by Umetrics Software.

“…Like adsorptive filtration, it is expected to be an extremely versatile technology. Adsorptive filtration has proved to be the least expensive treatment option for many water treatment applications [16,52,147,148]. Research over the past three decades has demonstrated the suitability of Fe 0 filters to quantitatively remove a wide variety of pathogens and toxic chemicals [17,25,53,71,116,119,142,[144][145][146]149].…”

Section: General Aspectsmentioning

confidence: 99%

“…When the contamination level starts off higher than MCL, there is a "breakthrough." In adsorptive filtration, the breakthrough corresponds to the exhaustion of the capacity of used adsorbent (breakthrough capacity) [147,148]. For Fe 0 filters, however, breakthrough may/should be observed before Fe 0 is exhausted.…”

Section: Impact Of Solution Chemistrymentioning

confidence: 99%

Making Fe0-Based Filters a Universal Solution for Safe Drinking Water Provision

et al. 2017

Metallic iron (Fe 0 )-based filtration systems have the potential to significantly contribute to the achievement of the United Nations (UN) Sustainable Development Goals (SDGs) of substantially improving the human condition by 2030 through the provision of clean water. Recent knowledge on Fe 0 -based safe drinking water filters is addressed herein. They are categorized into two types: Household and community filters. Design criteria are recalled and operational details are given. Scientists are invited to co-develop knowledge enabling the exploitation of the great potential of Fe 0 filters for sustainable safe drinking water provision (and sanitation).