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8174

INFLUENCE OF PH AND TEMPERATURE ON SURFACE-ACTIVE PROPERTIES OF SOME HUMIC ACIDS

Article

Last updated: 03 Jan 2025

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Subjects

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Tags

Astronomy
Mathematics
Physics

Abstract

In this study, surface tension measurements were used to study the surface-active properties of olive humic acid (HAO) and commercial humic acid (HA2). The study was performed under different conditions of concentration, temperature, pH and time. The measurements showed that the amphiphilic character of the humic acids solutes at the air/water interface lowers the surface tension () of the solution with an increasing concentrations and temperatures. The critical micelle concentration (CMC) values of  both humic acids decreased with an increase in the temperature. Positive values of ∆So and ∆Ho suggested that, their adsorption at air/water interface, is endothermic and entropy driven. The surface tension–pH curve featured a minimum for both humic solutions, declining from higher and lower pH values.  

DOI

10.21608/absb.2017.8174

Keywords

Surface tension, Humic acids, pH, Entropy, olive

Authors

First Name

A.

Last Name

El-Bayaa

MiddleName

A.

Affiliation

Faculty of Science, Al-Azhar University (Girls). Cairo, Egypt

Email

-

City

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Orcid

-

First Name

Asmaa

Last Name

Al-Amir

MiddleName

-

Affiliation

Faculty of Science, Al-Azhar University (Girls). Cairo, Egypt

Email

-

City

-

Orcid

-

Volume

28

Article Issue

Issue 2-D

Related Issue

1594

Issue Date

2017-06-01

Receive Date

2017-01-01

Publish Date

2017-06-01

Page Start

17

Page End

26

Print ISSN

1110-2535

Online ISSN

2636-3305

Article File

ABSB_Volume 28_Issue Issue 2-D_Pages 17-26.pdf

PDF . 745.7kB

Link

https://absb.journals.ekb.eg/article_8174.html

Detail API

https://absb.journals.ekb.eg/service?article_code=8174

Order

3

Type

Original Article

Type Code

520

Publication Type

Journal

Publication Title

Al-Azhar Bulletin of Science

Publication Link

https://absb.journals.ekb.eg/

MainTitle

INFLUENCE OF PH AND TEMPERATURE ON SURFACE-ACTIVE PROPERTIES OF SOME HUMIC ACIDS

Details

Type

Article

Created At

22 Jan 2023