A rapid technique for measuring oxidation-reduction potential for solid materials

Rajib, Mohammad; I, Mubeena Parveen; Oguchi, Chiaki T.

doi:10.18801/jstei.070119.53

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…nitrates, nitrites, chlorinated hydrocarbons) the ORP should be analyzed. It measures the tendency of a substance to obtain electrons and be reduced (Rajib et al 2019). The runoff water contains both nitrates and short-lived nitrites, which are considered to be extremely mobile forms of nitrogen in the soil/water environment due to their high solubility and low affinity to the surface of ground particles.…”

Section: Discussion Of the Test Resultsmentioning

confidence: 99%

Properties of Reactive Materials for Application in Runoff Water Treatment Systems

Fronczyk¹

2020

J. Ecol. Eng.

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The emissions related to urbanized areas, including communication routes and accompanying facilities, are considered as essential sources of subsoil pollution. Enhancement of the naturally occurring removal processes in infiltration systems, e.g. through placing the appropriately selected materials (treatment zones) on the flow path of runoff water, prevents the spread of undesirable components. The article presents the analysis of tests checking the properties of selected low-cost mineral materials, activated carbon and zero-valent iron in terms of their applicability in the runoff water treatment zones. Their physical features, surface structure, and chemical and hydraulic properties were analysed. The test results indicate a well-developed surface area of active carbon and halloysite, as well as an extensive pore volume of active carbon, halloysite, zeolite and diatomite. Nevertheless, the average pore diameters indicated the potential limited access of pollutants to the inner structure of all analyzed materials. The chemical parameters point to the stimulation potential of precipitation processes by limestone sand and silica spongolite, ion exchange by zeolite and silica spongolite, and oxidation-reduction processes by zero-valent iron. The value of the material hydraulic conductivity may potentially limit their application in infiltration systems. Taking into account all analyzed parameters, activated carbon together with silica spongolite and zeolite have the best application potential.

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Section: Discussion Of the Test Resultsmentioning

confidence: 99%

Properties of Reactive Materials for Application in Runoff Water Treatment Systems

Fronczyk¹

2020

J. Ecol. Eng.

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“…The physical parameters consisted of surface soil depth, conductivity, pH, and temperature and were surveyed using a handy water checker named multi-parameter water quality meter model WM-22EP and a global positioning system for the recording of coordinates. For accurate measurement, the instrument was calibrated using 2 points of standard solution with tenfold different concentrations encompassing the target concentration (Rajib et al 2019).…”

Section: Field Survey and Hydrogeochemical Analysismentioning

confidence: 99%

Hydrogeochemical Analysis of Unconfined Groundwater in the Surrounding Salt Farming Areas of Pademawu, Madura, Indonesia

Gemilang

Wisha

Mardyanto

2022

AJSTD

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The Pademawu coast has rapidly transformed into salt ponds, causing seawater intrusion and pollution. This study aims to examine the quality of groundwater in the surrounding settlement area of Pademawu and assess its eligibility for daily use. The psychochemical parameters of groundwater are measured in situ. Groundwater samples from several stations are analyzed in the laboratory and used to collect several chemical compounds, including Ca2+, Mg2+, Na+, K+, HCO3-, Cl-, SO42-, Fe2+, Mn2+, F-, NO2-, NO3, and CaCO3. The detected concentrations are then used to calculate TH, sodium adsorption ratio (SAR), %Na, PI, KR, and MH. Hydrochemical calculation and interpretation are also performed. The groundwater characteristics are determined according to TDS, conductivity, and water quality index (WQI). Results showed that the groundwater facies are predominated by Ca-HCO3 (50%) in the northern and middle study areas and Na-Cl (37%) in the salt farming area. The groundwater is categorized as SAR (C2S1) in the north and SAR (C4S2) in the south. The primary groundwater consists of Na+ and Cl- (dominant cation and anion) originating from salt farming. The TDS in the salt farming area ranges from 1000 mg/L to 3000 mg/L (slightly saline). The WQI ranges from 39.0 to 735.4, which encompasses excellent water, good water, very poor water, and unsuitable for consumption. Salt farming infiltration toward unconfined aquifers is the primary factor causing groundwater pollution. Mitigation efforts to minimize scattered infiltration must be applied in the Pademawu Subdistrict by modifying the system between salt farming and settlement areas.

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“…ORP, sedimentlerdeki mikrobiyal süreçlerin türleri veya kirlenmiş akiferlerdeki kirleticileri içeren tepkimeler ve aerobik veya anaerobik ortamların kimyası hakkında fikir vermektedir. Redoks potansiyelinin negatif olması ortamın anaerobik olduğunu gösterirken pozitif olması ortamın aerobik olduğunu göstermektedir [17,18]. Bu çalışmadaki sedimentin redoks potansiyeli -5.8 mV değerinde olup negatiftir.…”

Section: A Elektrokimyasal Performansunclassified

Sediment Mikrobiyal Yakıt Hücrelerinde Bakır ve Grafit Katot Elektrotların Kullanımı

Orhan

Erensoy

et al. 2020

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Mikrobiyal yakıt hücresi, elektrik enerjisinin mikroorganizmalar tarafından katalize edilen organik maddeler yoluyla üretildiği biyo-elektrokimyasal cihazlardır. Organik madde içeriği yüksek olan malzemelerden biri sedimenttir. Mikrobiyal yakıt hücrelerinde, organik malzeme kaynağı olarak sediment kullanılarak sediment esaslı mikrobiyal yakıt hücreleri imal edildi. Sediment esaslı mikrobiyal yakıt hücrelerinin sorunlarından biri olan düşük güç yoğunluğunu artırmak için yeni elektrotlar araştırılmaktadır. Bu çalışmada, aynı ortamdan alınan aynı özelliklere sahip sediment malzeme, eşit miktarlarda, aynı özelliklere sahip iki ayrı plastik kutuya yerleştirildi. Kutuların birine grafit anot ve grafit katot elektrotlar yerleştirildi ve G-G MYH olarak adlandırıldı. Diğer kutuya grafit anot ve bakır katot elektrotlar yerleştirildi ve G-Cu MYH olarak adlandırıldı. Burada amaç, grafit ile bakır katot elektrotların farklarını tespit etmek ve sediment esaslı mikrobiyal yakıt hücrelerinin güç yoğunluğunu arttırmaktır. Deneylerin sonucuna göre, G-Cu MYH ve G-G MYH'nin sağladıkları en yüksek güç yoğunlukları sırasıyla, 455.5 mW/m 2 ve 143 mW/m 2 olarak ölçüldü. Sediment esaslı mikrobiyal yakıt hücreleri için grafit katot malzemesi yerine bakır katot malzemesinin kullanımının daha doğru bir strateji olduğu anlaşılmıştır.

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A rapid technique for measuring oxidation-reduction potential for solid materials

Cited by 3 publications

References 5 publications

Properties of Reactive Materials for Application in Runoff Water Treatment Systems

Properties of Reactive Materials for Application in Runoff Water Treatment Systems

Hydrogeochemical Analysis of Unconfined Groundwater in the Surrounding Salt Farming Areas of Pademawu, Madura, Indonesia

Sediment Mikrobiyal Yakıt Hücrelerinde Bakır ve Grafit Katot Elektrotların Kullanımı

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