Fluoride Removal from Groundwater by Adsorption Technology, Salifu, Abdulai

Автор: Jayant K Singh (Editor), Nishith Verma (Editor)
Название: Aqueous phase adsorption
ISBN: 1138575216 ISBN-13(EAN): 9781138575219
Издательство: Taylor&Francis
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Цена: 168430.00 T
Наличие на складе: Нет в наличии.
Описание: This book covers theoretical aspects of adsorption, followed by an introduction to molecular simulations and other numerical techniques that have become extremely useful as an engineering tool in recent times to understand the interplay of different mechanistic steps of adsorption. .

Автор: Adri?n Bonilla-Petriciolet; Didilia Ileana Mendoza
Название: Adsorption Processes for Water Treatment and Purification
ISBN: 331958135X ISBN-13(EAN): 9783319581354
Издательство: Springer
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Цена: 130430.00 T
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Описание: This book provides researchers and graduate students with an overview of the latest developments in and applications of adsorption processes for water treatment and purification.

Автор: Tien, Chi
Название: Introduction to Adsorption
ISBN: 0128164468 ISBN-13(EAN): 9780128164464
Издательство: Elsevier Science
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Цена: 167310.00 T
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Описание: Introduction to Adsorption: Basics, Analysis, and Applications presents adsorption basics that are relevant and essential to its application, including data analysis, interpretation and design calculations. The book deliberately keeps background information to a minimum, instead comprehensively covering adsorption of liquid solutions, the difference between equilibrium individual solute uptake and surface excess, a general discussion of adsorbate uptake mechanisms and uptake rate expression, uptake steps, performance models and their generalizations, application of performance models, and design methods based on the constant behavior assumption and unused bed length concept.

Автор: Abida Farooqi
Название: Arsenic and Fluoride Contamination
ISBN: 8132222970 ISBN-13(EAN): 9788132222972
Издательство: Springer
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Цена: 93160.00 T
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Описание: The book highlights the concrete situation in Pakistan - including the severity of the problem, its health effects and the risks posed to the people living in affected areas by these two major pollutants- and points out essential research areas that call for immediate attention.

Автор: Sivasankar
Название: Surface Modified Carbons as Scavengers for Fluoride from Water
ISBN: 3319406841 ISBN-13(EAN): 9783319406848
Издательство: Springer
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Цена: 121890.00 T
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Описание: This book discusses the problems and feasible remediation of fluoride contamination in groundwater. The book investigates applications of various carbons derived from bio-mass and bio-polymers. It also inquires into surface modified carbons that use inorganic ions to help remove excess fluoride ions in drinking water and wastewater effluents. The compliance of kinetic and isotherm models with fluoride sorption is covered, and the suggested mechanisms of defluoridation by surface modified carbon materials is described.

Название: AWWA B701-18 Sodium Fluoride
ISBN: 1625763069 ISBN-13(EAN): 9781625763068
Издательство: Mare Nostrum (Eurospan)
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Цена: 79470.00 T
Наличие на складе: Невозможна поставка.
Описание: Describes sodium fluoride (NaF), coarse crystalline grade, for use in the treatment of potable water.

Автор: Bruins, J.H.
Название: Manganese Removal from Groundwater
ISBN: 1138373478 ISBN-13(EAN): 9781138373471
Издательство: Taylor&Francis
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Цена: 117390.00 T
Наличие на складе: Невозможна поставка.
Описание:

In The Netherlands, Belgium and other European countries, manganese is removed by conventional groundwater treatment with aeration and rapid (sand) filtration. Such a treatment process is easy to operate, cost effective and sustainable, because it does not make use of strong oxidants such as O3, Cl2, ClO2 and KMnO4 with the associated risk of by-product formation and over or under dosing.

However, application of aeration-filtration is also facing drawbacks, especially the long ripening time of filter media. Due to the long ripening time, water companies have to waste large volumes of treated water, making this process less sustainable. Also, costs associated with filter media ripening (man power, electricity, operational and analysis costs) are high. Therefore decreasing the filter ripening time, regarding manganese removal is a big issue.

Although already extended research has been carried out into manganese removal, the controlling mechanisms, especially of the start up face of filter media ripening, are not fully understood yet. The emphasis of this thesis is to provide a better understanding of the mechanisms involved in the ripening of virgin filter media, regarding manganese removal and how to shorten or completely eliminate the long ripening period of filters with virgin material.

This thesis therefore highlights the role of the formation of a manganese oxide coating on virgin filter media. Characterization and identification revealed that the responsible manganese oxide for an effective manganese removal was Birnessite. It was found that Birnessite, formed at the beginning of the ripening process was of a biological origin. Based on the knowledge that manganese removal in conventional groundwater treatment is initiated biologically, long ripening times may be reduced by creating conditions favouring the growth of manganese oxidizing bacteria, e.g., by limiting the back wash frequency and / or intensity. Additionally, this thesis also shows that the use of freshly prepared manganese oxide, containing Birnessite, can completely eliminate filter media ripening time.