fluoride in drinking water and its removal pdf

Fluoride In Drinking Water And Its Removal Pdf

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Aneeza Rafique, M. The study describes the removal of fluoride from drinking water using modified immobilized activated alumina MIAA prepared by sol-gel method. The modification was done by adding a specific amount of alum during the sol formation step.

Removal of Fluoride from Drinking Water Using Modified Immobilized Activated Alumina

Box: , Nekemte, Ethiopia. Box: 19, Ambo, Ethiopia. The data used to support the results of this study are included within the article, and any further information is available from the corresponding author upon request. Exposure to fluoride beyond the recommended level for longer duration causes both dental and skeletal fluorosis. Thus, the development of cost-effective, locally available, and environmentally benign adsorbents for fluoride removal from contaminated water sources is absolutely required. In the present study, diatomaceous earth diatomite locally available in Ethiopia, modified by treating it with an aluminum hydroxide solution, was used as an adsorbent for fluoride removal from aqueous solutions. Adsorption experiments were carried out by using batch contact method.

These metrics are regularly updated to reflect usage leading up to the last few days. Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts. The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric. Find more information on the Altmetric Attention Score and how the score is calculated. Higher intake of fluoride can cause potential health hazards.

The effects of operating parameters such as pH, initial concentration, adsorbent dose, contact time, agitation speed and temperature were analysed using response surface methodology. The significance of independent variables and their interactions were tested by the analysis of variance and t test statistics. Fluoride adsorption kinetics followed pseudo-second-order model with high correlation of coefficient value 0. On the other hand, thermodynamic data suggest that adsorption is favoured at lower temperature, exothermic in nature and enthalpy driven. The adsorbents were characterised through scanning electron microscope, Fourier transform infrared spectroscopy and point of zero charges pH ZPC ranges from pH 6. Finally, error analysis clearly demonstrates that all three adsorbents are well fitted with Langmuir isotherm compared to the other isotherm models.

Fluoride in Drinking Water and Nanotechnological Approaches for Eliminating Excess Fluoride

Fluoride contamination has been recognised as one of the major problems worldwide, imposing a serious threat to human health and affecting the safety of drinking water. Adsorption is one of the widely considered appropriate technologies for water defluorination. The present study describes the preparation of a zirconium-based metal organic framework MOF adsorbent using a solvothermal method and its adsorption efficiency for removal of fluoride ions from water. It was found that the synthesized MOF showed the distinguishable octahedral shape particle with a lattice spacing of 0. Adsorption studies were carried out to study the defluorination effectiveness by varying contact time 30— min , adsorbent dose 0. The maximum removal efficiency for fluoride using MOF at equilibrium was found to be Moreover, the adsorption kinetic studies indicate that the overall fluoride adsorption process was best described by pseudo-second-order kinetics.

Box: , Nekemte, Ethiopia. Box: 19, Ambo, Ethiopia. Exposure to fluoride beyond the recommended level for longer duration causes both dental and skeletal fluorosis. Thus, the development of cost-effective, locally available, and environmentally benign adsorbents for fluoride removal from contaminated water sources is absolutely required. In the present study, diatomaceous earth diatomite locally available in Ethiopia, modified by treating it with an aluminum hydroxide solution, was used as an adsorbent for fluoride removal from aqueous solutions. Adsorption experiments were carried out by using batch contact method.


Various technologies are being used to remove fluoride from water but still the problem has not been rooted out. In this paper, a broad overview.


Removal of Fluoride from Drinking Water Using Modified Immobilized Activated Alumina

Drinking water quality and fluoride concentration. Universidade Federal de Santa Catarina. Faculdade de Odontologia de Piracicaba.

Ruwanthi W. Premathilaka, Nalinda D. Arising awareness of health hazards due to long-term exposure of fluoride has led researchers to seek for more innovative strategies to eliminate excess fluoride in drinking water. Fluoride-bearing chemicals in both natural and anthropogenic sources contaminate drinking water, which mainly cause for human fluoride ingestion. Hence, developing sustainable approaches toward alleviation is essential.

 - Меня осенило. Здесь шестнадцать групп по четыре знака в каждой. - О, ради Бога, - пробурчал себе под нос Джабба.  - Все хотят поиграть в эту игру. Сьюзан пропустила эти слова мимо ушей.

Removal of Fluoride from Drinking Water Using Modified Immobilized Activated Alumina

Дворик под названием Апельсиновый сад прославился благодаря двум десяткам апельсиновых деревьев, которые приобрели в городе известность как место рождения английского мармелада. В XVI11 веке некий английский купец приобрел у севильской церкви три десятка бушелей апельсинов и, привезя их в Лондон, обнаружил, что фрукты горькие и несъедобные. Он попытался сделать из апельсиновой кожуры джем, но чтобы можно было взять его в рот, в него пришлось добавить огромное количество сахара.

Джабба занес палец над клавишей Ввод. - Давайте же, - скомандовал Фонтейн. Джабба нажал на клавишу.

Чтобы ключ никто не нашел, Танкадо проделал то же самое с Цифровой крепостью. Он спрятал свой ключ, зашифровав его формулой, содержащейся в этом ключе. - А что за файл в ТРАНСТЕКСТЕ? - спросила Сьюзан. - Я, как и все прочие, скачал его с сайта Танкадо в Интернете. АНБ является счастливым обладателем алгоритма Цифровой крепости, просто мы не в состоянии его открыть.


(Parker, ; Meenakshi and Maheshwari, ) By ion-exchange process, fluoride can be removed from water by a strongly alkaline anion-.


Почему. Сьюзан охватила паника. Она быстро проверила отчет программы в поисках команды, которая могла отозвать Следопыта, но ничего не обнаружила. Складывалось впечатление, что он отключился сам по. Сьюзан знала, что такое могло произойти только по одной причине - если бы в Следопыте завелся вирус.

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