Relationship between oxidative degradation of 2-mercaptobenzothiazole and physicochemical properties of manganese (hydro)oxides

2009 ◽  
Vol 6 (1) ◽  
pp. 83 ◽  
Author(s):  
C. S. Liu ◽  
L. J. Zhang ◽  
C. H. Feng ◽  
C. A. Wu ◽  
F. B. Li ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Organic Pollutants ◽  
Organic Contaminants ◽  
Organic Pollutant ◽  
Oxidative Degradation ◽  
Point Of Zero Charge ◽  
Organic Pollutant Degradation ◽  
Degradation Rates ◽  
Wide Range ◽  
Oxidative Reactivity

Environmental context. Manganese (hydro)oxide is one kind of the most important natural minerals that are capable of oxidising organic contaminants with a wide range of functionality. However, the oxidative reactivity of manganese (hydro)oxides for organic pollutant degradation may depend on their individual physicochemical properties. It is important to determine a relationship between their oxidative reactivity and physicochemical properties. Abstract. The oxidative reactivity of manganese (hydro)oxides is important for geochemical transformation of organic pollutants. Here, 2-mercaptobenzothiazole (MBT) degradation by six manganese (hydro)oxides, including γ-MnOOH, β-MnO2, α-MnO2, γ-Mn2O3, δ-MnO2, and MO-700, were investigated with different initial MBT concentrations, manganese (hydro)oxide dosages and pH values. The results show the oxidative reactivity of manganese (hydro)oxides towards MBT degradation strongly depends on their physicochemical properties. Specific surface area and reduction potential of manganese (hydro)oxides were positively correlated with MBT degradation rates, whereas pH at the point of zero charge (pHPZC) of manganese (hydro)oxides and apparent activation energy (Ea) were negatively correlated. A high average oxidation state with the same chemical valence always corresponds to high oxidative reactivity. Such findings provide some insights into understanding the transport and fate of organic pollutants in the presence of different manganese (hydro)oxides in the natural environment.

Photocatalytic organic pollutants degradation in metal–organic frameworks

2014 ◽  
Vol 7 (9) ◽  
pp. 2831-2867 ◽  
Author(s):  
Chong-Chen Wang ◽  
Jian-Rong Li ◽  
Xiu-Liang Lv ◽  
Yan-Qiu Zhang ◽  
Guangsheng Guo
Keyword(s):  
Organic Pollutants ◽  
Organic Pollutant ◽  
Metal Organic Frameworks ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation ◽  
Metal Organic

This review summarizes research advances in photocatalytic organic pollutant degradation in metal–organic frameworks.

Linkages between the occurrence of persistent organic pollutants and biogeochemical characteristics of deep-sea trenches

2020 ◽  
Author(s):  
Gisela Horlitz ◽  
Stefano Bonaglia ◽  
Igor Eulaers ◽  
Ronnie N. Glud ◽  
Anna Sobek
Keyword(s):  
Organic Matter ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Deep Sea ◽  
Sediment Cores ◽  
Abyssal Plain ◽  
Organic Carbon Content ◽  
Focusing Effect ◽  
Degradation Rates ◽  
Wide Range

<p>The biogeochemistry of deep-sea trenches is strongly influenced by their V-shape topography and tectonic position in the ocean, leading to a focusing effect of sediment and organic matter into the trench centre. Recent findings showed elevated mineralization rates in trench sediments, suggesting both high carbon turnover and organic matter degradation rates. As persistent organic pollutants (POPs) favourably partition to organic matter, deep-sea trenches act as a sink for these substances. Composition, source and age of the organic matter have been shown to have a significant influence on contaminant dynamics in sediment from more shallow regions. Also, the trophic status of marine systems plays a significant role in transport of POPs from air to water and to sediment. However, knowledge about organic pollutants in deep-sea environments is scarce. In the present study, sediment samples from two deep-sea trenches with different trophic states and deposition regimes are analysed for POPs with a wide range of physicochemical properties. Concentrations will be compared between the semi-eutrophic Atacama and the oligotrophic Kermadec Trench. Sampling of sediment cores was performed at the slope, abyssal plain and trench at Atacama (depth between 2,500 and 8,000m) and at the abyssal plain and trench at Kermadec (depth of 6,000 and 9,600m). The total organic carbon content largely varied between 0.3 and 2.1% at different sites at the Atacama Trench, while values were more homogeneous at the Kermadec Trench (around 0.3%). Preliminary results from the Atacama samples demonstrate concentrations of PCBs at the pg g<sup>-1</sup> dw level, and indicate highest concentrations to occur at the highest depth in the trench. Low sedimentation- and high mineralization rates in the trench centre, as well as the funnel-effect from the topology may explain these differences.</p>

A cost-effective, stable, magnetically recyclable photocatalyst of ultra-high organic pollutant degradation efficiency: SnFe2O4 nanocrystals from a carrier solvent assisted interfacial reaction process

2015 ◽  
Vol 3 (23) ◽  
pp. 12259-12267 ◽  
Author(s):  
Kuan-Ting Lee ◽  
Shih-Yuan Lu
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Organic Pollutants ◽  
Organic Pollutant ◽  
Waste Water Treatment ◽  
Cost Effective ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation ◽  
Recyclable Photocatalyst ◽  
Carrier Solvent

SnFe2O4 nanocrystals, which are cost-effective, stable, and magnetically recyclable, exhibit ultra-high degradation efficiencies toward recalcitrant organic pollutants and are proven to be an extraordinary photocatalyst for Fenton-like processes for waste water treatment.

A novel in situ preparation method for nanostructured α-Fe2O3 films from electrodeposited Fe films for efficient photoelectrocatalytic water splitting and the degradation of organic pollutants

2015 ◽  
Vol 3 (8) ◽  
pp. 4345-4353 ◽  
Author(s):  
Qingyi Zeng ◽  
Jing Bai ◽  
Jinhua Li ◽  
Ligang Xia ◽  
Ke Huang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Organic Pollutants ◽  
Preparation Method ◽  
Organic Pollutant ◽  
Pollutant Degradation ◽  
In Situ Preparation ◽  
Organic Pollutant Degradation ◽  
Pec Water Splitting

Highly photoactive α-Fe2O3 films prepared from novel electrodeposited Fe films were reported for PEC water splitting and organic pollutant degradation.

scholarly journals Degradation of Organic Pollutants by Titanium Dioxide Matrix Composites

2021 ◽  
Vol 245 ◽  
pp. 02039
Author(s):  
Li Han ◽  
Yan Gao ◽  
Xing Gao ◽  
Weijuan Gong ◽  
Hui Wang
Keyword(s):  
Titanium Dioxide ◽  
Organic Pollutants ◽  
Organic Pollutant ◽  
Chemical Properties ◽  
Matrix Composites ◽  
Pollutant Degradation ◽  
Advantages And Disadvantages ◽  
Organic Pollutant Degradation ◽  
Stable Chemical ◽  
Development Direction

As a semiconductor material, titanium dioxide has the advantages of stable chemical properties, no pollution and low price, which is widely used in the field of organic pollutant degradation. The modification methods of semiconductor composite and nonmetallic doping for titanium dioxide are described. The degradation efficiency of modified titanium dioxide composite for organic pollutants is proposed. The advantages and disadvantages of the composite in preparation and application are pointed out. Finally, the development direction of modified titanium dioxide composite in the future is described.

scholarly journals Interior engineering of seaweed-derived N-doped versatile carbonaceous beads with CoxOy for universal organic pollutant degradation

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 5009-5024 ◽  
Author(s):  
Shufeng Bo ◽  
Xin Zhao ◽  
Qingda An ◽  
Junmei Luo ◽  
Zuoyi Xiao ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Organic Pollutant ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation

Interior engineering of seaweed-derived N-doped versatile carbonaceous beads with CoxOy formed by simple co-crosslinking and pyrolysis procedures are utilized for the degradation of various organic pollutants via peroxymonosulfate (PMS) activation.

Constructing a brand-new advanced oxidation process system comprised of MgO2 nanoparticles and MgNCN/MgO nanocomposites for organic pollutant degradation

2021 ◽  
Author(s):  
Ningning Dong ◽  
Doudou Wu ◽  
Lifa Ge ◽  
Wei Wang ◽  
Fatang Tan ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Organic Pollutant ◽  
Advanced Oxidation ◽  
The Novel ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation ◽  
Process System

A brand-new advanced oxidation process (AOP) system consisting of MgO2 nanoparticles and MgNCN/MgO nanocomposites was firstly developed for the degradation of organic pollutants. In the novel AOP system, MgO2 nanoparticles...

scholarly journals Screening and Distribution of Contaminants of Emerging Concern and Regulated Organic Pollutants in the Heavily Modified Guadalhorce River Basin, Southern Spain

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3012
Author(s):  
Marta Llamas ◽  
Iñaki Vadillo-Pérez ◽  
Lucila Candela ◽  
Pablo Jiménez-Gavilán ◽  
Carmen Corada-Fernández ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
River Basin ◽  
Organic Pollutants ◽  
Organic Contaminants ◽  
Chemical Properties ◽  
Environmental Tracers ◽  
Wide Range ◽  
Flow Pathways ◽  
Initial Description ◽  
Point And Diffuse Sources

Emerging pollutants have aroused an increasing concern due to their ubiquitous presence in the environment and harmful potential. Both emerging (e.g., pharmaceuticals and personal care products) and regulated organic pollutants pose a serious threat to water quality and their presence and spatial distribution are complicated to address as they can derive from several factors: distribution of point and diffuse sources, environmental conditions, hydrogeological features of the region and inherent properties of the considered contaminants. In this study, a ground and surface water monitoring campaign was conducted in the three main detritic groundwater bodies of an extensive and heavily modified river basin in order to draft an initial description of the occurrence and distribution of a wide range of organic contaminants. In total, 63 out of 185 target pollutants were detected. An attempt to understand the importance of different factors governing the distribution of some of the most frequently found pollutants was made. Antibiotics spatial distribution is potentially influenced by the hydrogeological functioning of the basin modified by hydraulic infrastructures (reflected by hydrochemistry and environmental tracers δ2H and δ18O), not directly related to the distribution of potential sources. The presence of other organic pollutants does not reflect an evident correlation with flow pathways. Differences in contaminant occurrence are potentially attributed to the way pollutants are released into the environment as well as physico-chemical properties.

Ligninolytic Activity of White Rot Fungi from GGV campus as Bioremediation of Organic Pollutants

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Sushil Kumar Shahi ◽  
Nikki Agrawal
Keyword(s):  
Organic Pollutants ◽  
Organic Pollutant ◽  
White Rot Fungi ◽  
Ligninolytic Enzymes ◽  
Ligninolytic Enzyme ◽  
White Rot ◽  
Ligninolytic Activity ◽  
The North ◽  
Physiological Group ◽  
Wide Range

White rot fungi constitute a diverse physiological group are capable of transforming and mineralizing a wide range of organopollutants. The Ligninolytic enzymes of white rot fungi are substrate specific, essential for Lignin degradation and organic pollutant remediation. In the present study white rot fungi were collected from the north region of Chhattisgarh of Guru Ghasidas Vishwavidyalaya (GGV) Campus. 40 species were collected and isolated then Qualitative and Quantitative screening for the Ligninolytic enzyme assaywere carried out. Out of 40 species, 5 species show potent Ligninolytic activity. In future we can utilize these fungi for the degradation of organic pollutants.

Microbiological Detoxification of Hazardous Organic Contaminants: The Crucial Role of Substrate Interactions

1992 ◽  
Vol 25 (11) ◽  
pp. 403-410 ◽  
Author(s):  
B. E. Rittmann
Keyword(s):  
Organic Pollutants ◽  
Information Flow ◽  
Organic Contaminants ◽  
Crucial Role ◽  
Substrate Utilization ◽  
Energy Flows ◽  
Hazardous Pollutants ◽  
Primary Substrate ◽  
Substrate Types

Microbiological detoxification of hazardous organic pollutants is highly promising, but its reliable implementation requires a sophisticated understanding of several different substrate types and how they interact. This paper carefully defines the substrate types and explains how their interactions affect the bacteria's electron and energy flows, information flow, and degradative activity. For example, primary substrates, which are essential for growth and maintenance of the bacteria, also interact with degradation of specific hazardous pollutants by being inducers, inhibitors, and direct or indirect cosubstrates. The target contaminants, which often are secondary substrates, also have the interactive roles of self-inhibitor, inhibitor of primary-substrate utilization, inducer, and a part of an aggregate primary substrate.

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