Adsorption and desorption studies of phenolic compounds on hydroxyapatite-sodium alginate composite

Benaddi, Rabia; Aziz, Faissal; harfi, K. El; Ouazzani, Naaila

doi:10.5004/dwt.2021.26979

Cited by 7 publications

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“…These plyphenols also inhibit the growth of microorganisms, especially bacteria. Phenols also affect human health by denaturing proteins and destroying cells [3], Various processes have been studied by several authors to eliminate phenols, namely oxidation [4], coagulation [5], ozonation [6], infiltration [7] and membrane technology [8] and adsorption [9,10], the comparison between different methods of treatment of OMWW has also been carried out by other authors 11]. In this work we will show the extent of this problem of OMWW in the region of Marrakech Safi in Morocco with data and figures as well as a physicochemical and bacteriological characterization of OMWW from different industrial units.…”

Section: Introductionmentioning

confidence: 99%

The Environmental Problem of Olive Mill Waste Water in Morocco: Data Analysis and Characterization

Benaddi¹

2022

ijcsrr

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This work proposes a comparative study between several provinces in the region of Marrakech Safi concerning the pollution generated by the industrial units of crushing olives, in particular the volume of olive mill wate water (OMWW) and the polluting load. A physicochemical and bacteriological characterization of the OMWW issues from different industrial olive crushing units was also carried out, the result found showed a high polluting power of the OMWW that differs from one unit to another depending on the mode of crushing of the olive, Indeed, the OMWW are very loaded with polyphenols and organic matter. This effluent also has an acidic pH due to the presence of organic acids (phenolic acids, fatty acids). The high electrical conductivity of the OMWW is due to the presence of natural mineral salts and salts used to preserve olives until grinding such as Na+, Cl– and Ca2+ …. A physicochemical and bacteriological characterization of some wells downstream of the industrial units have also realized to study the impact of OMWW on ground water quality, it was found that most of the wells downstream of the oil mills concerned are of good quality.

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Section: Introductionmentioning

confidence: 99%

The Environmental Problem of Olive Mill Waste Water in Morocco: Data Analysis and Characterization

Benaddi¹

2022

ijcsrr

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“…An ICP-AES spectrometer type THERMO FLASH was used to determine the main constituent elements of the adsorbents. analysis of the results obtained showed that HA/SA is composed in addition of Na and Ca of phosphate due to the insertion of hydroxyapatite in the alginate [35]. X-rays of HA/SA show that is not well crystallized, its spectrum due to the structure of the adsorbent which is semi-amorphous, some weak peaks were detected due to the structure of HA/SA, Analysis of the FTIR spectrum of the adsorbent shows the presence of bands around 614 and 1031 cm -1 attributed to the vibrations of the phosphate groups, absorption bands relating to ether, carboxylic groups and hydroxyl functions were also detected, and in the range of 3000-3600 cm −1 , stretching vibrations of the O-H bonds of alginate are detected.…”

Section: Resultsmentioning

confidence: 97%

“…Then 0,125 g of HA is added to the solution obtained by stirring for 2 hours until the production of a homogeneous dispersion. then the solution is introduced using a syringe Under magnetic stirring in a reactor containing 50 mL of CaCl2 solution (1 g / L), The coagulated beads were then washed with distilled water [35].…”

Section: A Adsorbent Descriptionmentioning

confidence: 99%

Treatment of Olive Mill Waste Water by Adsorption on Hydroxyapatite-Sodium Alginate Composite

Benaddi¹,

Bouriqi²,

Aziz³

et al. 2022

IJESD

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The olive sector and in particular that of the extraction of olive oil requires large quantities of water, therefore obtaining olive oil generates two by-products, one liquid (OMWW) and the other solid (pomace). The OMWW are the aqueous phase resulting from the crushing of olives, causing worrying environmental problems in particular that it contains large quantities of organic compounds especially phenols compounds which cause many environmental problems such as water pollution. Therefore, the treatment of OMWW is very necessary. The purpose of this work was the investigation of the efficiency of hydroxyapatite-Sodium alginate composite for the adsorption of phenolic compounds, which are contained in OMMW. It showed promising results in reducing the phenol compounds and organic matter by 60% and 64% respectively and the reduction of Hydroxytyrosol and Tyrosol by 100% and 38% respectively, which are the most predominant polyphenols in OMWW. For second cycle of adsorption-desorption, the adsorbent lost slightly its adsorption capacity, reduction rate of phenol compounds and organic matter pass from 64% and 60% to 45% and 50% respectively.

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“…Different thermodynamic parameters namely; the change in free energy (DG°, kJ mol −1 ), enthalpy (DH°, kJ mol −1 ), and entropy (DS°, kJ mol −1 K −1 ) were calculated. The change in enthalpy and entropy were calculated from the slope and intercept of Van't Hoff model (eqn ( 14)) while the change in free energy from eqn (16).…”

Section: Adsorption Of Phenolmentioning

confidence: 99%

Fabrication of silica/calcium alginate nanocomposite based on rice husk ash for efficient adsorption of phenol from water

Khoj

2024

RSC Adv.

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Adsorption and desorption studies of phenolic compounds on hydroxyapatite-sodium alginate composite

Cited by 7 publications

References 0 publications

The Environmental Problem of Olive Mill Waste Water in Morocco: Data Analysis and Characterization

The Environmental Problem of Olive Mill Waste Water in Morocco: Data Analysis and Characterization

Treatment of Olive Mill Waste Water by Adsorption on Hydroxyapatite-Sodium Alginate Composite

Fabrication of silica/calcium alginate nanocomposite based on rice husk ash for efficient adsorption of phenol from water

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