In-Situ Oxidative Degradation of Emerging Contaminants in Soil and Groundwater Using a New Class of Stabilized MnO2 Nanoparticles

2016 ◽  
pp. 112-136
Author(s):  
Bing Han ◽  
Wen Liu ◽  
Dongye Zhao
Keyword(s):  
Organic Contaminants ◽  
Emerging Contaminants ◽  
Low Cost ◽  
Oxidative Degradation ◽  
In Situ Remediation ◽  
New Class ◽  
Mno2 Nanoparticles ◽  
In Situ Degradation ◽  
Trace Concentrations

Emerging Organic Contaminants (EOCs) such as steroidal estrogen hormones are of growing concern in recent years, as trace concentrations of these hormones can cause adverse effects on the environmental and human health. While these hormones have been widely detected in soil and groundwater, effective technology has been lacking for in-situ degradation of these contaminants. This chapter illustrates a new class of stabilized MnO2 nanoparticles and a new in-situ technology for oxidative degradation of EOCs in soil and groundwater. The stabilized nanoparticles were prepared using a low-cost, food-grade Carboxymethyl Cellulose (CMC) as a stabilizer. The nanoparticles were then characterized and tested for their effectiveness for degradation of both aqueous and soil-sorbed E2 (17ß-estradiol). Column tests confirmed the effectiveness of the nanoparticles for in-situ remediation of soil sorbed E2. The nanoparticle treatment decreased both water leachable and soil-sorbed E2, offering a useful alternative for in-situ remediation of EOCs in the subsurface.

scholarly journals The Degradation of Phenol via in-situ H2O2 Production Over Supported Pd-based Catalysts

2021 ◽  
Author(s):  
Alba Santos ◽  
Richard Lewis ◽  
David John Morgan ◽  
Thomas Davies ◽  
Euan Hampton ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Oxidative Degradation ◽  
H2o2 Production ◽  
In Situ Production ◽  
Supported Pd

The oxidative degradation of phenol via the in-situ production of H2O2 from molecular H2 and O2 offers an attractive route to the destruction of organic contaminants in water streams, potentially...

scholarly journals Hexachlorocyclohexane toxicity in water bodies of Pakistan: challenges and possible reclamation technologies

2021 ◽  
Author(s):  
Talat Ara ◽  
Waqar-Un Nisa ◽  
Muzammil Anjum ◽  
Luqman Riaz ◽  
Aansa Rukya Saleem ◽  
...  
Keyword(s):  
Low Cost ◽  
Industrial Effluents ◽  
Treatment Method ◽  
Agricultural Runoff ◽  
Crop Productivity ◽  
Indus Basin ◽  
Ex Situ ◽  
In Situ Remediation ◽  
Residual Concentration

Abstract Pakistan is an agro-economy country where the hexachlorocyclohexane (HCH) pesticides is being used to improve the crop productivity, as a result, the risk of contamination of soil and sediment has been increased. HCH exhibits all the characteristics of persistent organic pollutants (POP), therefore; added to the list of ‘new POPs’ in 2009. This review report revealed that the major rivers of Pakistan such as Indus Basin, River Ravi, River Chenab and their tributaries all are contaminated with HCH and the highest residual concentration (4,090 ng/g) was detected in pesticide burial ground in Hyderabad city. Major sources of HCH contamination were identified as agricultural runoff, discharge of untreated industrial effluents and surface runoff. In order to manage HCH pollution, various ex-situ and in-situ remediation techniques along with their merits and demerits are thoroughly reviewed. Among these, microbial bioremediation is low cost, environment friendly, effective in-situ remediation technique for remediation of HCH. Overall, the information provided in this manuscript will provide a future reference to the scientific community and bridge the knowledge gap between HCH release in environment and their mitigation through proper treatment method.

In situ remediation of subsurface contamination: opportunities and challenges for nanotechnology and advanced materials

2019 ◽  
Vol 6 (5) ◽  
pp. 1283-1302 ◽  
Author(s):  
Tong Zhang ◽  
Gregory V. Lowry ◽  
Natalie L. Capiro ◽  
Jianmin Chen ◽  
Wei Chen ◽  
...  
Keyword(s):  
Emerging Contaminants ◽  
Engineered Nanomaterials ◽  
Advanced Materials ◽  
In Situ Remediation ◽  
Subsurface Contamination ◽  
Subsurface Remediation

Engineered nanomaterials alone or in combination with other technologies may improve in situ subsurface remediation of legacy and emerging contaminants.

scholarly journals Atomic-level design of CoOH+–hydroxyapatite@C catalysts for superfast degradation of organics via peroxymonosulfate activation

2018 ◽  
Vol 54 (39) ◽  
pp. 4919-4922 ◽  
Author(s):  
Feng Song ◽  
Huayang Zhang ◽  
Shaobin Wang ◽  
Lihong Liu ◽  
Xiaoyao Tan ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Organic Contaminants ◽  
Oxidative Degradation ◽  
Atomic Level ◽  
Simultaneous Adsorption ◽  
Adsorption Of Co ◽  
Level Design

In situ formation of CoOH+–hydroxyapatite@C via ion exchange between Ca and Co realises the simultaneous adsorption of Co2+ and catalytic peroxymonosulfate oxidation for superfast oxidative degradation of organic contaminants.

054 In Situ Degradation Parameters of Three Chronological Maturities of _Tifton 85' Bermudagrass from Cattle Supplemented with Varying Levels of Distillers' Dried Grains

2016 ◽  
Vol 94 (suppl_1) ◽  
pp. 27-27
Author(s):  
W. B. Smith ◽  
J. L. Foster ◽  
K. C. McCuistion ◽  
S. J. Abatti ◽  
M. Lesak ◽  
...  
Keyword(s):  
Distillers Dried Grains ◽  
In Situ Degradation

To Eliminate Curtain Effect of FIB TEM Samples by a Combination of Sample Dicing and Backside Milling

2014 ◽  
Author(s):  
Jian-Shing Luo ◽  
Hsiu Ting Lee
Keyword(s):  
Sample Preparation ◽  
Focused Ion Beam ◽  
Preparation Method ◽  
Low Cost ◽  
Ion Beam ◽  
Sample Preparation Method ◽  
Site Specific ◽  
Dual Beam ◽  
Transmission Electron

Abstract Several methods are used to invert samples 180 deg in a dual beam focused ion beam (FIB) system for backside milling by a specific in-situ lift out system or stages. However, most of those methods occupied too much time on FIB systems or requires a specific in-situ lift out system. This paper provides a novel transmission electron microscopy (TEM) sample preparation method to eliminate the curtain effect completely by a combination of backside milling and sample dicing with low cost and less FIB time. The procedures of the TEM pre-thinned sample preparation method using a combination of sample dicing and backside milling are described step by step. From the analysis results, the method has applied successfully to eliminate the curtain effect of dual beam FIB TEM samples for both random and site specific addresses.

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