Bulk optode sensors for batch and flow-through determinations of lead ion in water samples

Bualom, Chantana; Ngeontae, Wittaya; Nitiyanontakit, Sira; Ngamukot, Passapol; Imyim, Apichat; Tuntulani, Thawatchai; Aeungmaitrepirom, Wanlapa

doi:10.1016/j.talanta.2010.05.028

Cited by 30 publications

(13 citation statements)

References 33 publications

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“…They were incorporated into cement-based materials manufactured using blended cement CEMII-B32.5 (from Ain El Kebira plant, Algeria), according to European standards [28][29][30], using demineralized water. The chosen pollutant content is usually 1% by mass, intended to ensure realistic pollution levels [7,8,14]. The other monitored elements during this study were chloride and sulfate as anions and sodium and potassium, calcium, lead, chromium and nickel as cations.…”

Section: Materials Manufacturingmentioning

confidence: 99%

“…Therefore, after 24 hours, the samples are immersed under 1 cm of demineralized water to ensure a rate of 100% humidity. After that, the moulds are stored in a room under a controlled temperature of (20 ± 2 • C) for 27 days [7,8,14].…”

Section: Materials Manufacturingmentioning

confidence: 99%

“…At the end of the MLT, the open pores were assumed to be saturated with water. Then, the porosity of the saturated material can be determined by relationship (2) by using the relative material density (monolithic blocks), determined by relationship (2) [7,8,14]:…”

Section: Water Absorption Capacitymentioning

confidence: 99%

“…Email: karimmoussaceb@yahoo.fr inorganic elements leaching from cement-based materials containing solidified wastes. A set of leaching procedures and testing conditions [7,8] have been applied to a large variety of materials: material compositions (different types of cement, waste and pollutants) [7,8,14], material particles sizes and porosity (monolithic or granular samples) [15] and solvent properties (demineralized water, alkaline, acidic or salt solution) [7,8,15]. These investigations have shown that the release behaviour of inorganic elements observed in different testing conditions allowed one to distinguish between two typical transfer mechanisms: (i) the pure diffusive transport for very soluble elements (alkaline metals) and (ii) the diffusion/dissolution-coupled process for the less soluble elements (for example, the amphoteric metals: nickel, lead and chromium).…”

Section: Introductionmentioning

confidence: 99%

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Influence of leaching conditions on the release kinetics of lead, chromium and nickel from solidified/stabilized cementitious materials

Moussaceb

Aït‐Mokhtar

Merabet

2012

Environmental Technology

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In this work, we investigate, on a laboratory scale, the influence of the leaching conditions on the release of various chemical elements from a cementitious material obtained by solidification of PbO, Ni2O3 and Cr2O3 with blended cement (CEMII-B32.5, according to European Standards). The pH effects on the pollutants release and the composition of the initial pore solution (target elements: chloride, sulfate, sodium, potassium, calcium, lead, chromium and nickel) were assessed through an experimental procedure consisting of two equilibrium leaching tests [the acid neutralization capacity (ANC) and the pore water (PW) tests] and the maximum mobile fraction (MMF) text. Samples of the same material were submitted in parallel to dynamic leaching tests in order to assess the influence of the boundary conditions (instantaneous liquid/solid (L/S) ratio, solution renewal) on the leaching kinetics of the target elements. The comparison criteria were the leachate saturation state, the released cumulative quantities and the leaching flux. Generally, leachate quantities obtained by the ANC, PW and MMF tests were important. However, the lowest released amount was observed for the monolith leaching test, and leachate saturation slowed down the dynamic release. Finally, experimental results highlighted another important parameter: the influence of the liquid/solid contact type on leaching kinetics.

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Section: Materials Manufacturingmentioning

confidence: 99%

Section: Materials Manufacturingmentioning

confidence: 99%

Section: Water Absorption Capacitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of leaching conditions on the release kinetics of lead, chromium and nickel from solidified/stabilized cementitious materials

Moussaceb

Aït‐Mokhtar

Merabet

2012

Environmental Technology

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“…According to the literature, good ratio of plasticizer to PVC is 2:1. [30][31][32] In order to select the best plasticizer, three membranes were prepared by DOP, DOS, and DBP. The membranes were prepared from a mixture of 30 mg of PVC, 60 mg of plasticizer, 4 mg of additive, and 3.5 mg of ionophore in 1.5 mL THF.…”

mentioning

confidence: 99%

A Novel Sensitive Bulk Optode Based on 5-Br Salophen as an Ionophore for Determination of Zinc Ion in Real Samples

Alian¹,

Semnani²,

Firooz³

et al. 2017

J. Braz. Chem. Soc.

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An optical sensing film was fabricated for sensitive determination of zinc ion in aqueous solutions. The optical sensor was prepared by synthesized ionophore, 5-Br salophen, dioctyl sebacate (DOS) as a plasticizer, sodium tetraphenyl borate (NaTPB) as a lipophilic anionic additive in a poly(vinyl chloride) membrane. The optode response is based on the cation-exchange membrane and indicated a significant absorbance signal change on the exposure to BrittonRobinson buffer solution of pH 5.7 containing Zn 2+ ion. The proposed sensor showed a linear range of 4.9 × 10 -5 -4.5 × 10 -12 mol L -1 with a limit of detection of 3.9 × 10 -12 mol L -1. Furthermore, satisfactory analytical sensing characteristics including selectivity, stability, and reproducibility for the determination of zinc ion were obtained. The response time of the sensing film was less than 5 min, depending on the concentration of Zn 2+ ions. The proposed sensor was successfully applied for determination of zinc in tap water, river water, and sea water. Keywords: optical sensor, zinc ion, UV-Vis spectrophotometry, 5-Br salophen IntroductionZinc is essential in human metabolism. It plays an important role in the activity of more than 200 enzymes responsible for genetic materials, food digestion, and metabolism of carbohydrate, protein and fat. The zinc deficiency leads to retarded growth and lower feed efficiency, inhibits the general well-being, and causes ulcers as well as scaling of the skin.1,2 Although zinc is necessary for health, excess zinc can be harmful. The excess amount of zinc ion in body significantly decreases copper and iron absorption. Moreover, the free zinc ion in solution is toxic to plants and aquatic organisms.3,4 Therefore, due to the pressing need for sensitive zinc determination in biological and environmental samples, particularly water samples, various analytical techniques have been proposed for the determination of zinc. Spectrophotometry, 5 atomic absorption spectroscopy (AAS), 6 inductively coupled plasma atomic emission spectrometry (ICP-AES), 7 solidphase extraction, 8 liquid-liquid extraction, 9 dispersive liquidliquid extraction, 10 ion-imprinted polymer nanoparticle, 11 nuclear magnetic resonance (NMR) molecular sensor, 12 and stripping potentiometry 13,14 are among the most used techniques. The sample preconcentration, time consuming and complicated operation, and high costs for equipment are some of the drawbacks to these methods. Therefore, these methods are not appropriate for the simple, economical, and sensitive determination of zinc in analysis strategy. In recent years, there has been a growing need for constructing chemical or electrochemical sensors to monitor the environmental samples fast and economically. In this regard, due to their advantages in comparison to ion-selective electrode, optical sensors have received considerable attention. Ease of production, good selectivity and sensitivity, low cost method, as well as high dynamic concentration range, are the main advantages. [15][16][17][18] Bulk optode...

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Continuing Issues with Lead: Recent Advances in Detection

Deibler

Basu

2012

Eur J Inorg Chem

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In the past Pb2+ has been used in many industries, including gasoline, piping, toys, paints, and more. The use of lead has led to a natural increase of lead concentration in the environment especially in air and water. According to the U.S. CDC “no level of lead in blood is considered safe.” Exposure to very low amounts of lead can cause several health complications including developmental and neurological disorders. Over the past several years an emphasis has been placed in developing systems that can detect lead at a very low concentration. A great deal of work has been accomplished in the development of Pb2+ sensors that can not only detect but also quantify the amount and in some cases in the presence of other metal ions. Herein, we describe current regulations, mode of exposure and recent development of sensing techniques.

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Bulk optode sensors for batch and flow-through determinations of lead ion in water samples

Cited by 30 publications

References 33 publications

Influence of leaching conditions on the release kinetics of lead, chromium and nickel from solidified/stabilized cementitious materials

Influence of leaching conditions on the release kinetics of lead, chromium and nickel from solidified/stabilized cementitious materials

A Novel Sensitive Bulk Optode Based on 5-Br Salophen as an Ionophore for Determination of Zinc Ion in Real Samples

Continuing Issues with Lead: Recent Advances in Detection

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