scholarly journals Adsorption process of polar and nonpolar compounds in a nanopore model of humic substances

2019 ◽  
Author(s):  
Daniel Tunega ◽  
Martin H. Gerzabek ◽  
Georg Haberhauer ◽  
Hans Lischka ◽  
Roland Solc ◽  
...  
Keyword(s):  
Humic Substances ◽  
Adsorption Process ◽  
Nonpolar Compounds

scholarly journals EVALUTION OF THE EFFICIENCY OF THE ADSORPTION PROCESS IN REMOVING HUMIC SUBSTANCES FROM WATER

2017 ◽  
Vol 18 (4) ◽  
pp. 107-115
Author(s):  
Jadwiga Kaleta ◽  
Alicja Puszkarewicz ◽  
Dorota Papciak
Keyword(s):  
Humic Substances ◽  
Adsorption Process

Incidence of Adsorption Process on the Reduction of Trihalomethanes Precursory in Algerian Surface Water

2014 ◽  
Vol 1065-1069 ◽  
pp. 3065-3070
Author(s):  
Saâdia Guergazi ◽  
Khemissi Yahiaoui ◽  
Samia Achour
Keyword(s):  
Activated Carbon ◽  
Surface Water ◽  
Humic Substances ◽  
Surface Waters ◽  
Adsorption Process ◽  
Organochlorine Compounds ◽  
Powder Activated Carbon ◽  
Remarkable Reduction ◽  
Very High

The objective of our work is to test the performance of activated carbon on the elimination of humic substances by adsorption before chlorination in order to reduce the trihalomethane precursor of humic substances for two types of surface waters of Biskra region (South East of Algeria). During the chlorination, the results showed that the potential of consumption chlorine is very high for raw surface water tested and accompanied by a rather significant quantity of the trihalomethanes. The adsorption of humic substances on powder activated carbon showed that the activated carbon whatever its form effectively removes humic substances and the yield could reach 98%. For coupling adsorption / chlorination, the results showed that adsorption induced a significant and even a remarkable reduction in both of potential of chlorine consumption and the training potential of organochlorine compounds especially trihalomethanes.

scholarly journals Adsorption of Humic Substances by Using Coconut Copra

2014 ◽  
Vol 695 ◽  
pp. 251-254
Author(s):  
Mohd Farid Atan ◽  
K.A. Mapi ◽  
S.N.F. Ghazali ◽  
Nazeri Abdul Rahman ◽  
Shanti Faridah Salleh
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Humic Substances ◽  
Adsorption Process ◽  
Treatment Plant ◽  
High Concentration ◽  
Quality Of Water ◽  
A New Technique ◽  
Solid Liquid

Nowadays, consumers are concern about the quality of water that being supplied in order to ensure the water supplied is free from any harmful substances for example like Humic Substances (HS). High concentration of HS in drinking water can cause disease for human such as stomach cancer. Thus, it is important to develop a new technique to improve the quality of drinking water. Therefore, the objective of this research is to investigate the potential of using coconut copra treated with citric acid as activated carbon in adsorbing HS contained in wastewater collected from Asajaya Treatment Plant situated in district of Samarahan, Sarawak. In this research, the optimum condition of adsorption process need to determined. As such, there are two types of parameters which are considered as constant; temperature and pH of activated carbon and variable; solid liquid ratio and residence time. As a result, this research has shown that coconut copra possess the capacity to adsorp 97.5% of HS contained in wastewater.

scholarly journals An Evaluation of the Possible Uses of CNT in Flow Conditions for Removing Humic Substances from Water

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2160
Author(s):  
Małgorzata Wolska ◽  
Zbigniew Ferenc ◽  
Anna Solipiwko-Pieścik
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Humic Substances ◽  
Organic Substance ◽  
Active Carbon ◽  
Adsorption Process ◽  
Low Molecular Weight ◽  
Flow Conditions ◽  
Naturally Occurring ◽  
Unit Effectiveness

This study concerns an evaluation of humic substance removal during an adsorption process on three sorbents: two consisting of carbon nanotubes embedded on a polymer (polypropylene and polyethylene) and granulated active carbon as a reference. The results that were obtained show a significantly lower organic substance removal effectiveness in the case of sorbents containing carbon nanotubes, with an insignificantly lower unit effectiveness (mg/g) of the nanosorbents during first two hours of adsorption. Unfortunately, nanosorbents only allow removing substances with a low molecular weight and high aromaticity, which significantly reduces the possibility of its use in technical conditions for naturally occurring water and the sorption capacity nanotubes were significantly lower in comparison to the GAC.

Removal of Humic Material from Mineralized Algerian Water Using Alum and Local Clay as Coagulant Aid

2014 ◽  
Vol 1025-1026 ◽  
pp. 487-493
Author(s):  
Samia Achour ◽  
Naïma Bacha
Keyword(s):  
Humic Acid ◽  
Humic Substances ◽  
Surface Waters ◽  
Adsorption Process ◽  
Aluminium Sulphate ◽  
Humic Material ◽  
Local Clay ◽  
Bentonitic Clay ◽  
Mineralized Water ◽  
Inorganic Constituents

The aim of this work was to evaluate the effects of different coagulation-flocculation conditions on the levels of natural organic matter removal for several mineralized water types in Algeria. First, trials are carried out on solutions prepared by dissolving humic acid in media with various degree of mineralization (distilled water and mineralized Algerian groundwater), using aluminium sulphate as coagulant. The effectiveness of the coagulation process appeared to depend not only on the pH of coagulation and coagulant dosages, but also inorganic constituents in water. Results showed obviously a stoechiometric relationship between the initial concentration of humic substances and optimal coagulant dosages for each water sample. Improvement of process performance is also investigated by using local clay as coagulant aid in coagulation-flocculation step. The use of bentonitic clay as a coagulant aid for alum improved the humic acid removal efficiency to some extent, especially when clay is added durind slow mix step. The experimental results of this study demonstrate the feasibility of removing humic substances from two surface waters using a flocculation-adsorption process.

Bacterial Co-oxidation of Natural Humic Substances in the Presence of Glucose

2004 ◽  
Vol 40 (1) ◽  
pp. 8
Author(s):  
N. Dzyuban ◽  
E. S. Bikbulatov ◽  
E. M. Bikbulatova ◽  
I. A. Kuznetsova
Keyword(s):  
Co Oxidation ◽  
Humic Substances

"PARAMETERS’ INFLUENCE OF CRUSHING BROWN COAL TO THE EXTRACTION OF HUMIC SUBSTANCES "

2017 ◽  
Vol 17 (6) ◽  
pp. 204-209
Author(s):  
K.S. Votolin ◽  
◽  
S.I. Zherebtsov ◽  
M.Y. Klimovich ◽  
O.V. Smotrina ◽  
...  
Keyword(s):  
Humic Substances ◽  
Brown Coal

Purification of water contaminated with heavy metals by example of lead as promising material based on graphene nanostructures

2020 ◽  
pp. 34-43
Author(s):  
N. R. Memetov ◽  
◽  
A. V. Gerasimova ◽  
A. E. Kucherova ◽  
◽  
...  
Keyword(s):  
Adsorption Process ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Parameter Estimates ◽  
Maximum Adsorption Capacity ◽  
Ecological Situation ◽  
Characteristic Parameters ◽  
Purification Of Water ◽  
Graphene Nanostructures

The paper evaluates the effectiveness of the use of graphene nanostructures in the purification of lead (II) ions to improve the ecological situation of water bodies. The mechanisms and characteristic parameters of the adsorption process were analyzed using empirical models of isotherms at temperatures of 298, 303, 313 and 323 K, which correspond to the following order (based on the correlation coefficient): Langmuir (0.99) > Temkin (0.97) > Dubinin – Radushkevich (0.90). The maximum adsorption capacity of the material corresponds to the range from 230 to 260 mg/g. We research the equilibrium at the level of thermodynamic parameter estimates, which indicates the spontaneity of the process, the endothermic nature and structure change of graphene modified with phenol-formaldehyde resin during the adsorption of lead (II) ions, leading to an increase in the disorder of the system.

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