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The non‐thermal plasma (NTP) technique was shown to be a method to improve indoor air quality. In particular in kitchens, odorous emissions can be removed by NTP. A combined concept of adsorption of volatile organic compounds (VOCs) and plasma regeneration of the adsorber was tested in adsorption‐regeneration‐adsorption cycles. As reference VOCs, 2‐methylthiophene, 2‐methylpyrazine, 2‐acetylthiazole, nonanal, and trans‐2‐nonenal were selected in humid air streams. These odorous compounds are emitted during cooking and frying processes. The adsorption‐regeneration concept was also tested during a simulated frying process with garlic in rape oil. A hydrophobic zeolite was chosen as adsorber material and placed directly into the discharge zone of a plasma reactor. [ABSTRACT FROM AUTHOR]

Abstract: Combing hydrothermal carbonization (HTC) of sewage sludge with wet oxidation of the resulting process waters (PWs) is a favorable economic process leading to a wastewater that is better amenable to biological treatments. Five PWs from HTC of sewage sludge and straw were oxidized with molecular oxygen. A good removal of chemical oxygen demand and dissolved organic carbon was shown. The oxidized waters proved good substrates for a subsequent anaerobic digestion. However, the oxidized PWs were identified as more toxic in germination tests with cress (Lepidium sativum L.) compared to the untreated PWs. [ABSTRACT FROM AUTHOR]

Dielectric heating with radio waves (RW) and microwaves is an alternative treatment to hazardous chemicals or hot air for pest control. RW can be used to heat large bulky materials homogeneously and smoothly to eliminate embedded pest organisms. Dielectric heating enables selective overheating of certain materials in a heterogeneous mixture. This feature of electromagnetic heating methods, in contrast to techniques based on thermal conduction, is caused by significant differences in the dielectric properties of pest organisms and matrix materials. This study proves unambiguously that selective heating of cylindrical pest organisms in wood matrices occurs under defined conditions. The selective heating effect strongly depends on the orientation of the pest organisms in the electric field. [ABSTRACT FROM AUTHOR]

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A recent study in this journal describes a new high‐performence adsorbent—all‐silica zeolite Beta—for removal of perfluorinated alkylated substances from contaminated water. The authors compare the new zeolite adsorbent with the most widely used adsorbent, which is activated carbon. Due to significant practical implications, this comparison is examined in the following. [ABSTRACT FROM AUTHOR]

Carbo-Iron® is presented as in situ reagent for dechlorination of chlorinated organic hydrocarbons in contaminated aquifers. The combination of the sorption properties of fine-grained activated carbon (AC) with the reducing properties of metallic iron extends the environmental application fields for both materials. The material combination also helps to overcome the limitations of pure nano-iron: the carrier AC has a positive influence on the particle mobility to generate broad sorption/reaction zones and increases the affinity of the reagent to non-dissolved hydrophobic pollutants. [ABSTRACT FROM AUTHOR]

Studies the adsorption of humic substances onto kaolin clay related to their structural features. Structural characterization of humic substances; Adsorption-desorption analysis; Irreversible adsorption.

Discusses the validation of a modified Flory-Huggins concept for description of hydrophobic organic compound sorption on dissolved humic substances. Solid-phase microextraction (SPME) of hydrophobic organic compounds; Affinity of polycyclic aromatic hydrocarbons to dissolved organic matter; Calculation of corption coefficients from the solubility parameters.