Optimization and feasibility assessment of the DPD colorimetric method with phosphate, iodide, and sulfuric acid for total residual oxidant monitoring in ballast water treatment systems DOI Open Access
Jiyoon Cho, Tae‐Wan Kim,

Mun Kyu Kim

et al.

Environmental Engineering Research, Journal Year: 2024, Volume and Issue: 30(3), P. 240563 - 0

Published: Oct. 8, 2024

The utilization of chlorine-based ballast water treatment systems is essential for preventing the spread invasive species, making continuous monitoring total residual oxidant (TRO) levels imperative compliance with environmental regulations. This study developed and optimized a phosphate buffer-sulfuric acid-based solution (PSS) use in N, N‒diethyl‒p‒phenylenediamine (DPD) colorimetric method to determine TRO water. Batch experiments demonstrated that pH 6 optimal buffer condition. Furthermore, addition iodide ions promoted rapid stable measurements across various conditions including ammonium concentrations, sodium hypochlorite (NaOCl) temperature, suspended solids (SS), natural organic matter (NOM), types. PSS achieved measurement accuracy within ±5% reference values, notably surpassing commercial citrate buffer-p‒toluenesulfonic (CTS), especially under challenging such as low NaOCl higher temperatures, presence SS. exhibited an average error rate 3.16%, compared 4.44% CTS. Field tests at facility further confirmed reliability real-time monitoring. reagent provides practical, cost-effective systems, supporting protection regulatory compliance.

Language: Английский

Degradation kinetics during food processing and storage DOI
Uma Tiwari

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 385 - 402

Published: Nov. 29, 2024

Language: Английский

Citations

0
Simultaneous Determination of 12 Disinfection By‐Products in Fish Muscles by Solvent Extraction Coupled With Gas Chromatography Equipped With an Electron Capture Detector DOI

Mengtao Ding,

Ai‐ke‐yi‐dan‐mu Zhamaerding,

Xialin Hu

et al.

Journal of Separation Science, Journal Year: 2024, Volume and Issue: 47(24)

Published: Dec. 1, 2024

ABSTRACT Disinfection by‐products (DBPs) have received considerable focus due to potential teratogenic, carcinogenic, and mutagenic effects; however, there is an evident gap in the availability of analytical methodologies for simultaneous determination DBPs fish, especially iodinated DBPs. This paper developed innovative method 12 DBPs, including four trihalomethanes (THMs), three haloacetonitriles, five THMs (I‐THMs), fish muscle, utilizing solvent extraction followed by gas chromatography with electron capture detection. The incorporates tert ‐butyl methyl ether as solvent, performing efficient vortex mixing, extraction, centrifugation under reduced temperature conditions facilitate processing physically disrupted tissues. It demonstrates sensitivity detection limits from 0.21 4.02 ng/g, recoveries 58.7% 129.7%. Applied real samples, bass ( n = 7) carp 7), all contained detectable concentrations between 8.2 275.25 ng/g. Significantly, aquaculture facility exhibited highest contamination, particularly chlorodiiodomethane at 194.57 I‐THMs present samples. Notably, this first about protocol biological matrices. will further research on human exposure assessment through consumption fish.

Language: Английский

Citations

0
Optimization and feasibility assessment of the DPD colorimetric method with phosphate, iodide, and sulfuric acid for total residual oxidant monitoring in ballast water treatment systems DOI Open Access
Jiyoon Cho, Tae‐Wan Kim,

Mun Kyu Kim

et al.

Environmental Engineering Research, Journal Year: 2024, Volume and Issue: 30(3), P. 240563 - 0

Published: Oct. 8, 2024

The utilization of chlorine-based ballast water treatment systems is essential for preventing the spread invasive species, making continuous monitoring total residual oxidant (TRO) levels imperative compliance with environmental regulations. This study developed and optimized a phosphate buffer-sulfuric acid-based solution (PSS) use in N, N‒diethyl‒p‒phenylenediamine (DPD) colorimetric method to determine TRO water. Batch experiments demonstrated that pH 6 optimal buffer condition. Furthermore, addition iodide ions promoted rapid stable measurements across various conditions including ammonium concentrations, sodium hypochlorite (NaOCl) temperature, suspended solids (SS), natural organic matter (NOM), types. PSS achieved measurement accuracy within ±5% reference values, notably surpassing commercial citrate buffer-p‒toluenesulfonic (CTS), especially under challenging such as low NaOCl higher temperatures, presence SS. exhibited an average error rate 3.16%, compared 4.44% CTS. Field tests at facility further confirmed reliability real-time monitoring. reagent provides practical, cost-effective systems, supporting protection regulatory compliance.

Language: Английский

Citations

0