reactive organics detection Articles

  • peCOD is the New NOM Monitoring Tool for Measuring Organic Reactivity - Case Study

    Natural organic matter (NOM) is a critical parameter for measuring drinking water quality.  Levels of NOM are associated with taste, odour, colour, chemical treatment dosage, and disinfectant by-product (DBP) formation.  There are several tools accepted by drinking water quality experts which are used to evaluate NOM: total organic carbon (TOC), dissolved organic carbon (DOC), UV254, ...


    By MANTECH

  • Reactive core mat installed as NAPL control remedy at vermont superfund site case study

    Project: Pine Street Canal Superfund Site Location: Burlington, Vermont U.S.A. Products: Reactive Core Mat Organoclay Organic Adsorption Media Background: A manufactured gas plant operated at the Pine Street Canal site from 1895 to 1966. The plant disposed of wastes from the gasification process, including coal tars, which ...


    By CETCO

  • Fast analysis of semi-volatile organic compounds using PTV-GC–TOF MS

    The evaluation of semi-volatile organic compounds (SVOCs) in environmental matrices poses many challenges for the analyst, not least the vast number that may be encountered in any given analysis. In addition, analyte reactivity and the potential for multiple analytes to co-elute makes achieving the required method detection limits (LODs or MDLs) quickly and cost-effectively a formidable task ...


    By SepSolve Analytical

  • Formation characteristics of haloacetic acids from phenols in drinking water chlorination

    Haloacetic acids (HAAs) are typical chlorination disinfection by-products in drinking water. Apart from natural organic matter, synthetic organic compounds in raw water contribute to HAAs due to their high frequency of detection in raw water and high reactive activities with chlorine. Formation characteristics of HAAs from synthetic organic compounds were investigated using seven phenols as ...


    By IWA Publishing

  • THE IMPACT OF ENDOCRINE‐DISRUPTING CHEMICALS ON OXIDATIVE STRESS AND INNATE IMMUNE RESPONSE IN ZEBRAFISH EMBRYOS

    Bisphenol A (BPA) and nonylphenol (NP) are well‐known endocrine‐disrupting chemicals (EDCs) ubiquitous in the aquatic environment, and present an ecotoxicological risk for the health of aquatic organisms. Limited attention has been given to the immunotoxicity of these chemicals. The present study revealed a concentration‐dependent increase of reactive oxygen species content and an induced ...


    By John Wiley & Sons, Ltd.

  • Indirect photochemical transformations of acyclovir and penciclovir in aquatic environments increase ecological risk

    Acyclovir and penciclovir, 2 antiviral drugs, are increasingly detected in aquatic environments. The present study explores the natural photochemical transformation mechanisms and fate of these drugs, examining direct and indirect photochemical transformation under simulated sunlight irradiation. The 2 antiviral drugs are photostable under certain conditions but significantly degrade in the ...


    By John Wiley & Sons, Ltd.

  • Carbon nanotubes and graphenes as adsorbents for adsorption of lead ions from water: a review

    Nanomaterials have wide applications as sorbents for water purification as they have high selectivity as well as capacity for organic/inorganic pollutants and contaminants in aqueous solutions. Non-essential toxic heavy metals present in water have become a major cause of many diseases, ageing, and genetic problems. Carbon-based nanomaterials have generated great interest in their use as sorbent ...


    By IWA Publishing

  • Zerovalent Iron nanoparticles for treatment of ground water contaminated by Hexachlorocyclohexanes

    Ground water and aquifer samples from a site contaminated by hexachlorocyclohexanes (HCHs; C6H6Cl6) were exposed to nanoscale iron particles to evaluate the technology as a potential remediation method. The summed concentration of the HCH isomers in ground water was approximately 5.16 µmol L–1 (1500 µg L–1). Batch experiments with 2.2 to 27.0 g L–1 iron nanoparticles showed that more than 95% of ...

  • Oxidative toxicity of PFCs in green mussel and BAF‐dependent QSAR

    Concerns regarding perfluorinated chemicals (PFCs) have risen in recent years due to their ubiquitous presence and high persistency. However, data on the environmental impacts of PFCs on marine organisms is very limited. Oxidative toxicity has been suggested to be one of the major toxic pathways for PFCs to induce adverse effects in organisms. To investigate the PFCs induced oxidative stress ...


    By John Wiley & Sons, Ltd.

  • The 2007 Marie Curie prize: the linear no threshold relationship and advances in our understanding of carcinogenesis

    Better knowledge of carcinogenesis has improved the assessment of the putative carcinogenic effects of low doses of Ionising Radiation (IR). Cancer induction is a main threat to multicellular organisms and safeguards have been introduced during evolution. Mutations result from endogenous agents, mainly Reactive Oxygen Species (ROS), and exogenous agents. IR and solar ultraviolet (UV) have existed ...


    By Inderscience Publishers

  • Electrochemical removal of carbamazepine in water with Ti/PbO2 cylindrical mesh anode

    Carbamazepine (CBZ) is one of the most frequently detected organic compounds in the aquatic environment. Due to its bio-persistence and toxicity for humans and the environment its removal has become an important issue. The performance of the electrochemical oxidation process and in situ production of reactive oxygen species (ROS), such as O3 and H2O2, for CBZ ...


    By IWA Publishing

  • Electrochemically activated water as an alternative to chlorine for decentralized disinfection

    Electrochemically activated (ECA) water is being extensively studied and considered as an alternative to chlorine for disinfection. Some researchers claim that ECA is by and large a chlorine solution, while others claim the presence of reactive oxygen species such as ozone and hydroxyl radicals in addition to chlorine. This study compares sodium hypochlorite (NaOCl) and ECA in terms of ...


    By IWA Publishing

  • Successful Biostimulation Treatment of TCE DNAPL

    The challenges posed by the presence of DNAPL are rooted in the unpredictable manner in which it spreads and moves through the subsurface, and the fraction of total contaminant mass it represents in an associated groundwater plume via sorbed, residual and drainable phases (typically greater than 99 percent). Under natural conditions, the dissolution of DNAPL is very slow, allowing groundwater ...


    By Arcadis

  • In situ chemical reduction (ISCR) of 1, 2 - DCA in groundwater confidential industrial site, Taiwan, ROC

    Adventus" ISCR technology employed, EHC®, a patented combination of hydrophilic, controlled-release solid carbon and zero valent iron (ZVI) and/or other reduced metal particles. EHC technology causes complete destruction of organic contaminants through two primary mechanisms: (i) chemical reduction and (ii) enhanced biological degradation. This unique combination stimulates ISCR of otherwise ...


  • The advantages and benefits of aerobic cometabolism

    Aerobic metabolism yields the energy-transferring molecule TPA at a much higher rate than anaerobic metabolism. The higher energy yield produces a greater viable population. The oxygenase enzymes involved in the cometabolism of chlorinated solvents are not induced by the presence of contaminants, so a high microbial population has a proportionately high yield of oxygenase enzymes. Aerobic ...


    By CL Solutions, LLC

  • Introduction to Ozone Injection Technology

    Untitled Document Ozone is a highly reactive chemical that has proven to be effective in destroying a wide variety of organic chemicals, including MtBE and chlorinated VOCs. ...

  • Converting plant waste into biofuels

    Promising advances using yeast and fungi. Written by Nancy W. Stauffer. You can read the original story in MIT News MIT researchers are genetically engineering yeast to break down stubborn plant fibers into sugars that it can then ferment — a first ...

  • Managing compliance: Understanding the basics of chemical emergency response management

    A stellar record of safety and compliance in demanding fields such as chemical emergency response is not easily obtained or managed. Successful programs are strategically developed, well defined, data-driven, process oriented, tactically deployed, implemented at all levels of the organization, well funded, routinely audited and revised and facilitated by experienced and dedicated professionals. ...


    By 3E Company

  • Cost Containment: Beyond the Obvious

    Utilities today can implement a number of different initiatives to help them contain costs and maximize profits. Some of those, such as switching to a more efficient fuel source if possible, can produce obvious results that are relatively easy to calculate. But there are other initiatives, though less obvious, that can produce significant results at the bottom line. One such cost-containment ...

  • Air Monitoring for the Gulf Oil Spill

    Ambient air monitoring is a priority in the ongoing efforts to contain and manage the oil spill from the Deepwater Horizon in the Gulf of Mexico. The following provides information about the kinds of airborne contaminants that are currently being monitored in the Gulf, how they are collected and how they are analyzed. For a given project, a suitable sampling plan – developed by ...


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