Results 211 to 220 of about 120,773 (255)

Photocatalytic Sensor for Chemical Oxygen Demand Determination Based on Oxygen Electrode

Analytical Chemistry, 2000
The construction and performance evaluation of a novel Chemical Oxygen Demand (COD) sensor is described. The sensor measures, using an oxygen electrode, a decrease of dissolved oxygen of a given sample resulting from photocatalytic oxidation of the organic compounds therein.
Y C, Kim, K H, Lee, S, Sasaki, K, Hashimoto, K, Ikebukuro, I, Karube   +5 more
openaire   +2 more sources

Ultrasound-assisted method for determination of chemical oxygen demand

Analytical and Bioanalytical Chemistry, 2002
A method for determination chemical oxygen demand (COD) assisted by use of ultrasound has been successfully evaluated for the first time. The method uses instrumentation simpler and cheaper and, in some instances, safer than that used by previous methods for the same purpose. The new device used for sonication is an all-glass cylindrical sonotrode that
Antonio, Canals, M, Del Remedio Hernández   +1 more
openaire   +2 more sources

Chemical oxygen demand: Historical perspectives and future challenges

Analytica Chimica Acta, 2017
Determining the chemical oxygen demand (COD) is challenging because of the chemicals that are used in the current methods. There is an urgent need to determine the pollution in surface waters from (heavy) industry via a simple, reliable and fast method.
René Bernard Geerdink, Ricardo Sebastiaan van den Hurk, Onno Jacob Epema   +2 more
openaire   +2 more sources

Determination of Chemical Oxygen Demand for Saline Wastewater

2010 4th International Conference on Bioinformatics and Biomedical Engineering, 2010
The interference of the chloride ion (Cl-) on the standard method for chemical oxygen demand (COD) determination proposed by American Publican Health Association (APHA) cannot be ignored, especially for samples with high salinity. Increasing the ratio of HgSO4:Cl- and adding some masking agents such as AgNO3, Cr3+, Al3+ are all good modifications of ...
Xiangjuan Ma, Yang Gao
openaire   +1 more source

Chemical oxygen demand and biochemical oxygen demand

2021
Sonika Singh, Jandeep Singh, Harminder Singh   +2 more
openaire   +1 more source

An automated system for the determination of chemical oxygen demand

Water Research, 1969
Abstract Measured volumes of sample, mercuric sulphate and potassium dichromate/ sulphuric acid digestant are metered into a mixing pot. The mixed solution is pumped through a 40 ft length of glass coil suspended in a fluidized sand bath heated to 160°C.
A.E Hey, A Green, N Harkness
openaire   +1 more source

Dichromate method for the determination of chemical oxygen demand

Journal of Analytical Chemistry, 2000
The oxidizability of organic substances of different classes was studied under the conditions of an official procedure for the determination of chemical oxygen demand (COD) with and without using Ag2SO4 as a catalyst. Organic substances can be divided into three groups: easily oxidizable compounds that are oxidized by 80–100% without a catalyst; medium-
Yu. M. Dedkov, O. V. Elizarova, S. Yu. Kel’ina   +2 more
openaire   +1 more source

Organic acids, biochemical oxygen demand and chemical oxygen demand in the soluble fraction of piggery slurry

Journal of the Science of Food and Agriculture, 1983
AbstractClose, largely linear, relationships were found between volatile fatty acids (VFA) determined by gas chromatography, total organic acids (TOA) determined colorimetrically, biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) in the soluble fraction of piggery slurries.
openaire   +2 more sources

Chemical Oxygen Demand

2021
openaire   +1 more source

Application of Advanced Oxidation Processes for the Treatment of Color and Chemical Oxygen Demand of Pulp and Paper Wastewater

Water (Switzerland), 2023
Magdi E A Zaki, Ali Irfan, Rab Nawaz
exaly