Track topics on Twitter Track topics that are important to you
In this study, the impact of Cu on the formation of iodo-trihalomethanes (I-THMs) during chlorination and chloramination of iodide-containing waters was investigated. Initially, the oxidant consumption and evolution of hypoiodous acid (HOI) were determined during disinfection in the presence of Cu and the interaction between natural organic matter humic acid (HA) and Cu was also analyzed. Subsequently, the formation of the I-THMs at various Cu concentrations was evaluated for chlorination and chloramination. Moreover, in order to explore the possible underlying mechanisms, five model compounds based on the HA structure were used to investigate the I-THMs formation with and without Cu during disinfection. The results indicated that the presence of Cu markedly affected the conformation of the HA rather than the HOI evolution during disinfection. The concentration of the I-THMs decreased from 34.5 ± 0.8 to 20.9 ± 0.8 nM as the Cu concentration increased from 0 to 20 μM during chlorination. In contrast, during chloramination, the total I-THMs concentration decreased from 320.7 ± 7.4 to 267.2 ± 10.7 nM as the Cu concentration increased from 0 to 5 μM and then increased to 315.0 ± 1.7 nM when the Cu concentration reached 20 μM. The disinfection experiments with the model compounds suggested that the impact of Cu on the I-THMs formation largely depended on the organic structures in the HA, thus leading to different results during chlorination and chloramination.
This article was published in the following journal.
Name: The Science of the total environment
Chlorination is essential to provide safe drinking water. However, this process leads to the formation of disinfection byproducts (DBPs). In this study, tryptophan (Trp) has been selected as a precurs...
Disinfection byproducts (DBPs) have attracted extensive attention due to their cytotoxicity and genotoxicity. This study investigates the effects of different ions on DBP formation during chlorination...
This study investigated the effects of ferrate and ozone pre-oxidation on disinfection byproduct (DBP) formation from subsequent chlorination or chloramination. Two natural waters were treated at benc...
Ultraviolet (UV) irradiation has been widely used in drinking water treatment processes, but its influence on the formation of disinfection by-products (DBPs), especially the emerging iodinated trihal...
Graphene oxide (GO) is a structural analog of graphene and contains numerous O-containing functional groups. As rapidly increasing production and usage of GO, it is inevitable to flow into the water a...
RATIONALE: 4'-Iodo-4'-deoxydoxorubicin may improve organ dysfunction and ease symptoms caused by primary systemic amyloidosis. PURPOSE: Phase II trial to study the effectiveness of 4'-iod...
The purpose of this study is to test the hypothesis that myopia progression can be slowed or prevented by low dose Echothiophate Iodide.
A multi-centre, open-label, single-arm, dose-finding phase I/II study to evaluate safety, tolerability, dosing schedule, and preliminary efficacy of carrier-added 4-L-[131I]iodo-phenylalan...
The purpose of this study is to evaluate the efficacy of potassium iodide during pregnancy on neuro-cognitive development of children followed up until two years.
This is a pilot imaging study for women whose tumors express NIS [Na+I- symporter, sodium iodide symporter]. Eligibility is limited to the presence of strong (3+) and/or plasma membrane st...
A hemeprotein that catalyzes the oxidation of the iodide radical to iodine with the subsequent iodination of many organic compounds, particularly proteins. EC 126.96.36.199.
Methanes substituted with three halogen atoms, which may be the same or different.
A thioureylene antithyroid agent that inhibits the formation of thyroid hormones by interfering with the incorporation of iodine into tyrosyl residues of thyroglobulin. This is done by interfering with the oxidation of iodide ion and iodotyrosyl groups through inhibition of the peroxidase enzyme.
Also called 4-hydroxy-3-iodo-5-nitrophenylacetate. A haptenic determinant that can be radiolabeled and used as salts and derivatives for investigations of immunogenic specificity studies.
An enzyme that catalyzes the chlorination of a range of organic molecules, forming stable carbon-chloride bonds. EC 188.8.131.52.