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Title: The effect of different date pits types on adsorption property
Authors: Noor Mordhi Sabah Al-Fadhli 
Supervisor: Prof. Abdulrahman Al-sulaili
Keywords: date pits; adsorption ; date seeds; isotherm types; freundlich; Langmuir
Issue Date: 2018
Publisher:  Kuwait university - college of graduate studies
Abstract: Environmental pollution has increased along with the world’s population; the pollution of water includes any water contaminated by chemical and bacterial particulate matter, decreasing the water quality. The adsorption process is considered to be one of the best treatments for water pollution because of the cost of operation, convenience and simple design compared with other techniques, and it has high removal efficiency. This research investigates the Langmuir and Freundlich adsorption properties and characteristics of 13 types of date pits selected from different countries: Sukkary and Khalas from Kuwait; Berhi from different countries of origin, such as Jordan and Saudi Arabia; Medjool from Palestine; and Ajwat Almdena, Helwa, Hamraa, Dahsya, Maskanya, Gasbaa, Fanhaa and Debsa from Saudi Arabia. Two chemicals were used in the research, methylene blue and phosphoric acid (H3PO4). The standard curve and activation processes for date pits were the chosen methods in the study. The conclusion is that different types of date pits have different properties. The highest dateto- date-pit ratio was for Debsa, at 15.2 %, and the lowest ratio was for Maskanya, at 4%. For the concentration of 100 g, the highest adsorption was for Berhe date pits from KSA, at 0.015 mg/l. For the concentrations of 50 and 25 g, the highest adsorption was for Berhe from Jordan, at 0.015 mg/l. For the concentration of 12.5 g, the highest adsorption was for Sukkary date pits, whereas for the concentration of 5 g, the highest rate of adsorption was for Gasba date pits. The highest removal efficiency was for Berhe from KSA, with an average value of 95.9%, and the lowest was for Ajwat Almadena, at 69.5%. All the date pits have Freundlich isotherms except for Dahsya, Khlas and Medjool, which have linear isotherms. The recommendations are that detailed characterization of the date pits should be considered, such as measuring the surface area and porosity, testing the adsorption properties with different wastewater types instead of methylene blue and determining the result of crushing date pits with different specific weights
Appears in Programs:2040 Environmental Sciences

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