Investigating Bio-Inspired Degradation of Toxic Dyes Using Potential Multi-Enzyme Producing Extremophiles.

Biological treatment methods overcome many of the drawbacks of physicochemical strategies and play a significant role in removing dye contamination for environmental sustainability. Numerous microorganisms have been investigated as promising dye-degrading candidates because of their high metabolic potential. However, few can be applied on a large scale because of the extremely harsh conditions in effluents polluted with multiple dyes, such as alkaline pH, high salinity/heavy metals/dye concentration, high temperature, and oxidative stress.

Effect of preparation method of noble metal supported catalyts on formaldehyde oxidation at room temperature: Gas or liquid phase reduction.

Formaldehyde (HCHO) is toxic to the human body and is one of the main threats to the indoor air quality (IAQ). As such, the removal of HCHO is imperative to improving the IAQ, whereby the most useful method to effectively remove HCHO at room temperature is catalytic oxidation. This review discusses catalysts for HCHO room-temperature oxidation, which are categorized according to their preparation methods, i.

Effect of a modified 13X zeolite support in Pd-based catalysts for hydrogen oxidation at room temperature.

This study investigated the effect of a modified 13X zeolite to Pd/zeolite catalyst on the oxidation of hydrogen to ensure safety from hydrogen leakage. The catalytic activity of Pd/zeolite catalysts was significantly affected by acid treatment of 13X zeolite support and various calcination temperatures (300 °C, 400 °C, 500 °C, 600 °C) of the Pd/zeolite catalyst. To understand the correlation between the activity and physical properties of the catalysts, activity test, XRD, BET, TEM, TPR, and TPO were performed; Pd/13X (400) was shown to have a high catalytic activity, which depended on the dispersion and particle size of palladium.

Role of oxide support in Ni based catalysts for CO methanation.

The CO methanation reaction of reduced and unreduced Ni based CeO, AlO, TiO and YO supported catalysts was investigated. The Ni/CeO and Ni/YO catalysts exhibited similar CO conversions at all reaction temperatures. The catalysts were studied by X-ray diffraction (XRD), H chemisorption, H temperature-programmed reduction (TPR), and diffuse reflection infrared Fourier transform spectroscopy (DRIFTS); the results suggested that the reducibility of both metal and support at low temperature, strong metal support interaction and small Ni particle size are important factors for low-temperature CO methanation.

Bacterial Biosorbents, an Efficient Heavy Metals Green Clean-Up Strategy: Prospects, Challenges, and Opportunities.

Rapid industrialization has led to the pollution of soil and water by various types of contaminants. Heavy metals (HMs) are considered the most reactive toxic contaminants, even at low concentrations, which cause health problems through accumulation in the food chain and water. Remediation using conventional methods, including physical and chemical techniques, is a costly treatment process and generates toxic by-products, which may negatively affect the surrounding environment.

Coconut Mesocarp-Based Lignocellulosic Waste as a Substrate for Cellulase Production from High Promising Multienzyme-Producing FW2 without Pretreatments.

Facing the crucial issue of high cost in cellulase production from commercial celluloses, inexpensive lignocellulosic materials from agricultural wastes have been attractive. Therefore, several studies have focused on increasing the efficiency of cellulase production by potential microorganisms capable of secreting a high and diversified amount of enzymes using agricultural waste as valuable substrates. Especially, extremophilic bacteria play an important role in biorefinery due to their high value catalytic enzymes that are active even under harsh environmental conditions.

Investigation of Lipolytic-Secreting Bacteria from an Artificially Polluted Soil Using a Modified Culture Method and Optimization of Their Lipase Production.

Compared to lipases from plants or animals, microbial lipases play a vital role in different industrial applications and biotechnological perspectives due to their high stability and cost-effectiveness. Therefore, numerous lipase producers have been investigated in a variety of environments in the presence of lipidic carbon and organic nitrogen sources. As a step in the development of cultivating the unculturable functional bacteria in this study, the forest soil collected from the surrounding plant roots was used to create an artificially contaminated environment for lipase-producing bacterial isolation.

Enhancement of performance and sulfur resistance of Si-doped V/W/Ti using sulfation for selective catalytic reduction of NO with ammonia.

The SO resistance improvement factor was confirmed to form Si(Si-O-Ti) species.In the optimised V/SiW/TiO catalyst; the incoming SO was converted to Si(SO).The formation of Si(SO) increased active sites for adsorbed NH, in the form of SO-NH to improve denitrification efficiency.

Effects of pH and metal composition on selective extraction of calcium from steel slag for Ca(OH) production.

This research article explains the effects of pH and metal composition on the selective calcium extraction from steel slag. The operating parameters including extraction solvent type, solvent concentration, metal composition of steel slag, substance type and pH were investigated. HCl, NHCl, NHOH and NaOH were employed as solvents to extract Ca from steel slag.

Surface Properties of Cement Kiln Dust with Water Treatment for Selective Extraction of Calcium and Potassium.

Water and hydrochloric acid were employed as solvents to extract K and Ca from K- and Ca- rich cement kiln dust (CKD). It has been shown that hydrochloric acid effectively extracts Ca and K from CKD with efficiencies of more than 85 and 99%, respectively. On the other hand, water, as a solvent, selectively extracts K and Cl with an efficiency of 99%.

Analysis of bacterial community using pyrosequencing in semen from patients with chronic pelvic pain syndrome: a pilot study.

Background: Although empirical antibacterial treatments are currently recommended for inflammatory chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS), physicians cannot verify infections in most cases. Therefore, in this study, the microbiota of semen was investigated via pyrosequencing to obtain evidence underlying infectious disease.

Methods: Patients diagnosed with CP/CPPS (n=17) and healthy volunteers (n=4) participated in the study.

Influence of the addition of vanadium to Pt/TiO catalyst on the selective catalytic oxidation of NH to N.

In this work, the effect of the addition of vanadium to the Pt/TiO catalyst on the selective catalytic oxidation (SCO) of NH to N was investigated. It was found that the addition of vanadium significantly enhanced catalytic activity at all tested temperatures. The Pt/V/TiO catalyst exhibited the highest NH conversion (∼100%) and NH to N conversion (∼81%) at 250°C.

Correction to: Nitropelagius marinus gen. nov., sp. nov., Isolated From Seawater, Je-bu island, South Korea.

The bacterial nomenclature used in the original submitted and published version of this article should be revised. The name Nitropelagi marinus was changed to Nitropelagius marinus with this erratum.

Promotional effect of antimony on the selective catalytic reduction NO with NH over V-Sb/Ti catalyst.

The effect of antimony on the selective catalytic reduction (SCR) performance and SO durability of V-Sb/Ti was investigated. The physicochemical characteristics of catalyst were characterized by various techniques, including Brunauer-Emmett-Teller (BET) surface area analysis, X-ray diffraction (XRD), NH/SO-temperature programmed desorption (TPD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs), X-ray photoelectron spectroscopy (XPS), and H-temperature programmed reduction (H-TPR). The V-Sb/Ti catalyst showed excellent activity in the range 200-300°C (compared with V/Ti), with an optimum achieved for 2 wt.

New Ni-based quaternary disk-shaped catalysts for low-temperature CO methanation: Fabrication, characterization, and performance.

Ni-based quaternary disk catalysts were manufactured for low-temperature CO methanation reactions, and the reaction activity was examined with respect to the thermal treatment conditions. By applying varying reduction and combustion treatments, the same catalysts were compared, and the Ni oxidation conditions and physical features were confirmed through X-Ray diffraction, scanning electron microscopy, and energy dispersive X-ray analyses. In addition, oxygen adsorption/desorption changes were measured by temperature-programmed reduction after pre-treating with oxygen and hydrogen.

Active oxygen species adsorbed on the catalyst surface and its effect on formaldehyde oxidation over Pt/TiO catalysts at room temperature; role of the Pt valence state on this reaction?

Pt/TiO catalysts, prepared by reduction pretreatment, showed enhanced catalytic activities in formaldehyde oxidation. X-ray photoelectron spectroscopy analysis confirmed that catalytic activity was affected by Pt valence states in the Pt/TiO catalyst. Using O re-oxidation tests, we showed that there was a correlation between the area of oxygen consumed and the ratio of metallic Pt species on the catalyst surface.

Influence of Mn valence state and characteristic of TiO on the performance of Mn-Ti catalysts in ozone decomposition.

The effects of physicochemical properties of Mn-Ti catalysts on O conversion were examined. The catalysts were prepared by a wet impregnation method that gave manganese supported on various commercial sources of TiO. The properties of the catalysts were studied using physicochemical techniques, including Brunauer-Emmett-Teller (BET) surface area analysis, X-ray diffraction (XRD), H temperature-programmed reduction (H-TPR), X-ray photoelectron spectroscopy (XPS), and thermal gravimetric analysis (TGA).

Nitropelagius marinus gen. nov., sp. nov., Isolated From Seawater, Je-bu island, South Korea [corrected].

A Gram-stain-negative, non-spore forming, non-motile and aerobic strain, designated JB22(T), was isolated from seawater, Je-bu Island, South Korea. Strain JB22(T) was catalase and oxidase positive. Optimal growth of JB22(T) was observed at 30 °C and pH 7.

Aneurinibacillus humi sp. nov., Isolated from Soil Collected in Ukraine.

A novel bacterium, designated U33(T), was isolated from a soil sample collected in Mykhailyky, Poltavs'ka oblast, Ukraine. The bacterium was aerobic, Gram-positive, spore-forming, and consists of motile rods. The taxonomic position of strain U33(T) was studied by a polyphasic approach, and the results clearly showed that the phenotypic and chemotaxonomic properties are consistent with those of the genus Aneurinibacillus.

Tumebacillus luteolus sp. nov., isolated from soil.

Two strains of Gram-stain-positive, aerobic, spore-forming and rod-shaped bacteria, designated U13T and U14, were isolated from soil of the Ukraine. Comparative analysis of the 16S rRNA gene sequences indicated that these strains belong to the genus Tumebacillus, with the highest 16S rRNA gene sequence similarity with Tumebacillus ginsengisoli Gsoil 1105T (95.48% and 95.

Leucobacter humi sp. nov., Isolated from Forest Soil.

A novel bacterial strain, designated Re6(T), was isolated from forest soil collected in Campbell University, North Carolina. The cells are aerobic, Gram-positive, non-motile, and rod shaped. Growth occurred at 4-42 °C (optimum, 25 °C), pH 6-9 (optimum, pH 6), and in 0-3 % NaCl (w/v).

Niabella thaonhiensis sp. nov., isolated from the forest soil of Kyonggi University in Korea.

Strain NHI-24(T) was isolated from forest soil by a polycarbonate membrane transwell plate. It is a Gram-negative, rod-shaped, non-motile, non-spore-forming bacterium. Phylogenetic analysis based on 16S rRNA gene sequence data indicated that strain NHI-24(T) is closely related to members of the genus Niabella: N.

Burkholderia eburnea sp. nov., isolated from peat soil.

A novel aerobic bacterium, designated strain RR11(T), was isolated from peat soil and was characterized by using a polyphasic taxonomic approach and identified in order to determine its taxonomic position. Strain RR11(T) is a Gram-negative, non-sporulating, motile, short-rod-shaped bacterium. 16S rRNA gene sequence analysis identified this strain as a member of the genus Burkholderia of the class Betaproteobacteria.

Bacillus thaonhiensis sp. nov., a new species, was isolated from the forest soil of Kyonggi University by using a modified culture method.

Using a new culture method for unculturable soil bacteria, we discovered a novel species, NHI-38(T), from the forest soil of Kyonggi University campus, South Korea. It was a Gram-positive, rod-shaped, and endospore-forming bacterial strain. It grew over a wide pH range (6.