Precipitation of Tricarboxylic Acid Biosurfactant Derived from Spiculisporic Acid with Metal Ions in Aqueous Solution

Hong, Jeong-Jin; Yang, Seung‐Man; Choi, Young-Kook; Lee, Choul-Ho

doi:10.1006/jcis.1995.1301

Cited by 11 publications

(7 citation statements)

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“…Soil washing has been successfully used for the treatment of soils contaminated with heavy metals, hydrocarbons and semi-volatile organic compounds (SVOCS) [8]. Soil washing usually employs different extractants such as acids, bases, chelating agents, electrolytes, oxidizing agents and surfactants [9][10][11][12][13].…”

Section: E120mentioning

confidence: 99%

“…For this procedure, the soil sample was crushed and approximately of 1 g of a representative sample was weighed accurately in a beaker (capacity of 250 ml) and then mixed with (15) ml of concentrated hydrochloric acid (HCl) and (5) ml of concentrated nitric acid (HNO3), the mixture was then heated in the heating sandy bath until the brown evaporation was disappeared and the sample arrived to dry state, this step takes about (45-60) minutes. Then cooling the beaker to laboratory temperature and then add 5 ml of concentrated hydrochloric acid (HCl) and then heated in the heating sandy bath, this step takes about (5)(6)(7)(8)(9)(10) minutes. Then cooling the beaker and add 5 ml of concentrated hydrochloric acid and 50 ml of heated distilled water to wash the sides of beaker from remains dissolved sample.…”

Section: Chemical Analysismentioning

confidence: 99%

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Batch and Column Extraction of Lead from Al-Doura Oil Refinery Soil

Gzar

Gatea²

2021

Journal of Petroleum Research and Studies

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The aim of this research is to investigate the extraction of lead (Pb) from soil of Al-Doura oil refinery in Baghdad/Iraq. Ethylenediaminetetraacetic acid disodium salt (Na2EDTA) and Hydrochloric acid (HCl) solution were used as extractants. Soil washing method was practiced in two ways, batch extraction and column extraction experiments. A set of batch experiments were carried out at different conditions of extractant (Na2EDTA, HCl) concentration, contact time, pH and agitation speed. From the batch experiments, the maximum removal percentages of Pb that have been obtained were 70 % using Na2EDTA (0.1M) at pH 4 , agitation speed 200 and at equilibrium time 4 hours and 65 % using HCl (1M) at pH 1.08 , agitation speed 200 at equilibrium time 5 hours. Column experiments were conducted at different conditions of extractant (Na2EDTA, HCl) concentration, contact time and flow rate. The maximum removal percentages of Pb were 78% using Na2EDTA (0.1M) at pH 4 , flow rate 30 ml/hr and equilibrium time 8 hours and 75% using HCl (1M) at pH 1.08, flow rate 20 ml/hr and equilibrium time 10 hours. The column extraction proved that the extractant volume required to achieve high removal efficiency is less than that of the batch extraction, but requires a longer contact time. The experimental data of batch and column extraction were applied in four kinetic models; first order, parabolic diffusion, two constant and Elovich model to find best fit model for extraction system. For batch extraction, the parabolic diffusion and two-constant models gave the best correlation {coefficient of determination (R2)} with experimental data using HCl and Na2EDTA respectively. While for column extraction, Elovich model gave good correlation with experimental data.

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Section: E120mentioning

confidence: 99%

Section: Chemical Analysismentioning

confidence: 99%

Batch and Column Extraction of Lead from Al-Doura Oil Refinery Soil

Gzar

Gatea²

2021

Journal of Petroleum Research and Studies

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“…The most significant disadvantage of these surfactants as opposed to other anionic surfactants is their propensity to precipitate when divalent cations, e.g., calcium and magnesium, are present; in other words fatty-acid surfactants have inferior hardness tolerance. Numerous efforts have been made to understand how to formulate hardness tolerant detergents: for example hardness tolerant anionic surfactants [3][4][5][6][7][8][9][10][11][12][13][14][15], mixed surfactant systems [16][17][18][19], builders which capture hardness ions [2,20,21], and microemulsion based formulations insensitive to water hardness [2,22].…”

Section: Introductionmentioning

confidence: 99%

“…El-Sukkary et al [4] synthesized and tested N-acylethylenediamine triacetic surfactants with ability to chelate multivalent ions. Hong et al [6] studied the low precipitation tendency of trisodium salt of 2-(2-carboxyethyl)-3-decyl maleic anhydride in the presence of various multivalent ions. 2-hydroxy-4-(methylthio)butanoic acid (HMTBA) has the potential to combine both the aforementioned structural strategies in one molecule, because this molecule contains both hydroxyl and carboxylic acid functionalities where there is a sulfur-containing branch between the two (see far left structure of Scheme1).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Novel Surfactants Based on 2‐Hydroxy‐4‐(Methylthio)Butanoic Acid: 1. Anionic Surfactants

Long

Karinshak

et al. 2015

J Surfact & Detergents

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2-Hydroxy-4-(methylthio)butanoic acid (HMTBA) is a commonly used animal feed additive available in large quantities. In this study, anionic surfactants were synthesized utilizing HMTBA as a starting material. Specifically, a straightchain fatty acid containing 12 or 16 carbon atoms was attached to the hydroxyl group via esterification. After neutralization of the carboxylic acid with sodium, the molecules behave as anionic surfactants. Oxidation of the sulfur atom can be performed to further increase water solubility. The molecules exhibit critical micelle concentrations (CMCs), and lower the surface tension to 35-45 mN/m at the CMC. The derivatives have low Krafft points (\4°C) and good wetting performance. The hardness tolerance of the ester made from dodecanoic acid is *2.5-4 orders of magnitude higher than an analogous carboxylate surfactant, namely sodium dodecanoate. Foam created according to the Ross-Miles foam test is substantial, but dissipates quickly as compared to other anionic surfactants. Keywords Surfactant Á Anionic Á Sulfoxide Á Ester Á Carboxylate Abbreviations HMTBA 2-Hydroxy-4-(methylthio)butanoic acid AES Alkyl ether sulfate SDS Sodium dodecyl sulfate SDBS Sodium dodecylbenzene sulfonate Symbols CMC Critical micelle concentration c CMC Surface tension at the CMC C m Maximum surface excess concentration/maximum adsorption density C20 Surfactant concentration that lowers the surface tension by 20 mN/m a min Minimum area per molecule at the interface Electronic supplementary material The online version of this article (

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“…Several types of extractants can be used to extract heavy metals and metalloids from contaminated soils for soil washing technology. The extractants may be acids, bases, chelating agents, electrolytes, oxidizing agents and surfactants [14][15][16][17], of which acids and chelating agents are the most popular extractive reagents for heavy metals decontamination. Acid washing leads to decreased soil productivity and adverse changes in the chemical and physical structures of soils due to mineral dissolution [18].…”

Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metal from Contaminated Soil with Chelating Agents

Jiang¹,

Tao²,

Liao³

2011

OJSS

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Removal of copper and nickel by the addition of the biodegradable chelating agent, chitosan and ethylenediamine tetraacetic acid (EDTA), was investigated, alongside the reaction of a reference compound sodium citrate for comparison. The artificial-contaminated soils were used in this study. The experiments showed that the extraction ability for copper and nickel from the contaminated soil decreased as follows: chitosan > EDTA > sodium citrate. The pH value of the eluents is the key to control the extraction, especially to chitosan solution. It was evident that the chitosan solution was the most efficient when the pH value was 3 - 3.5, the rate of extraction of copper being 43.36% and of nickel being 37.07%. And the best match of concentration and liquid/solid was 0.3 g/L and 10 mL/g

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Precipitation of Tricarboxylic Acid Biosurfactant Derived from Spiculisporic Acid with Metal Ions in Aqueous Solution

Cited by 11 publications

References 0 publications

Batch and Column Extraction of Lead from Al-Doura Oil Refinery Soil

Batch and Column Extraction of Lead from Al-Doura Oil Refinery Soil

Synthesis and Characterization of Novel Surfactants Based on 2‐Hydroxy‐4‐(Methylthio)Butanoic Acid: 1. Anionic Surfactants

Removal of Heavy Metal from Contaminated Soil with Chelating Agents

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