Evaluation of using clinoptilolite as a filter in drinking water wells for removal of lead (small-scale physical sand box model)

Heidarian, Mohammad Hassan; Nakhaei, Mohammad; Vatanpour, Vahid; Rezaei, Khalil

doi:10.1016/j.jwpe.2023.103558

Cited by 8 publications

(3 citation statements)

References 56 publications

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“…Причина насыщения свинцом подземных вод Центрального Ирана их контакт с вулканическими породами. В работе [20]…”

Section: ре зультаты исследованияunclassified

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Обзор Новых Конструктивных Решений Водозаборных Сооружений

Рыльцева

2023

(Stroitel stvo nauka i obrazovanie [Construction Science and Ed

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Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ); г. Москва, Россия АННОТАЦИЯ Введение. Предметом исследования являются водозаборные сооружения природных вод -поверхностных и подземных. Пожалуй, не существует ни одного инженерного сооружения, над совершенствованием конструкции и технического оснащения которого (в целях повышения надежности) не работали бы инженеры, ученые. Водозаборные сооружения в данном контексте не исключение. Рост площади жилой застройки, развитие промышленности, сельского хозяйства, государственные программы, направленные на снижение степени отрицательного воздействия на окружающую природную среду, создают предпосылки для строительства новых, реконструкции действующих водозаборов. Накопленные за последние десять лет научные разработки российских и зарубежных ученых, посвященные созданию новых конструкций сооружений для забора воды, нуждаются в обобщении. Материалы и методы. Проведен аналитический обзор новых научных трудов (периодических изданий, патентов, диссертационных исследований), в которых приводится описание инновационных конструкций водозаборных устройств, обеспечивающих технологический и (или) экономический эффект. Результаты. Установлено, что большее число новых изобретений нацелено на повышение барьерной роли водозаборов поверхностных вод по отношению к взвешенным, донным наносам и рыбной молоди. Эффект очистки воды водозаборным сооружением, как правило, обеспечивается фильтрованием, отстаиванием, а также комплексом этих процессов. Предлагаемые учеными конструкции рыбозащитных устройств включают одновременно фильтрующие преграды и средства воздействия на поведенческие реакции рыбной молоди. Интерес ученых также проявлен к разработке конструкции водозаборов подземных вод, способствующих увеличению дебита сооружения. Выводы. Выполнены обзорное описание и анализ новых конструктивных решений водозаборных сооружений, обозначены рекомендации по их применению. Собранные сведения могут найти практическое применение при проектировании новых водозаборов, модернизации действующих устройств.

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Section: ре зультаты исследованияunclassified

“…The reason for lead saturation of groundwater in Central Iran is its contact with volcanic rocks. In [20], it is proposed to use clinoptilolite as a well filter. It is proved that the efficiency of lead absorption can reach 85 %.…”

Section: Gridmentioning

confidence: 99%

Обзор Новых Конструктивных Решений Водозаборных Сооружений

Рыльцева

2023

(Stroitel stvo nauka i obrazovanie [Construction Science and Ed

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“…Clinoptilolite was modified to increase its affinity for fluoride ions, and the adsorption processes were evaluated. Clinoptilolite has been used for the removal of lead [ 18 ], tetracycline [ 19 ], ammonium [ 20 ], and fluoride [ 17 ] from wastewater. Compared with other similar works [ 21 , 22 ], this paper indicates the steps required to establish the optimized dosage of modified clinoptilolite in order to acquire the maximum fluoride absorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Fluoride Adsorption from Aqueous Solution by Modified Zeolite—Kinetic and Isotherm Studies

2023

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Fluorine is a very common element in the Earth’s crust and is present in the air, food, and in natural waters. It never meets in the free state in nature due to its high reactivity, and it comes in the form of fluorides. Depending on the concentration of fluorine absorbed, it may be beneficial or harmful to human health. Similar to any trace element, fluoride ion is beneficial for the human body at low levels, but as soon as its concentration becomes too high, it is toxic, inducing dental and bone fluorosis. The lowering of fluoride concentrations that exceed the recommended standards in drinking water is practiced in various ways around the world. The adsorption process has been classified as one of the most efficient methods for the removal of fluoride from water as it is environmentally friendly, easy to operate, and cost-effective. The present study deals with fluoride ion adsorption on modified zeolite. There are several influential parameters, such as zeolite particle size, stirring rate, solution pH, initial concentration of fluoride, contact time, and solution temperature. The maximum removal efficiency of the modified zeolite adsorbent was 94% at 5 mg/L fluoride initial concentration, pH 6.3, and 0.5 g modified zeolite mass. The adsorption rate increases accordingly with increases in the stirring rate and pH value and decreases when the initial fluoride concentration is increased. The evaluation was enhanced by the study of adsorption isotherms using the Langmuir and Freundlich models. The Langmuir isotherm corresponds with the experimental results of the fluoride ions adsorption with a correlation value of 0.994. The kinetic analysis results of the fluoride ions adsorption on modified zeolite allowed us to demonstrate that the process primarily follows a pseudo-second-order and then, in the next step, follows a pseudo-first-order model. Thermodynamic parameters were calculated, and the ΔG° value is found to be in the range of −0.266 kJ/mol up to 1.613 kJ/mol amidst an increase in temperature from 298.2 to 331.7 K. The negative values of the free enthalpy ΔG° mean that the adsorption of fluoride ions on the modified zeolite is spontaneous, and the positive value of the enthalpy ∆H° shows that the adsorption process is endothermic. The ∆S° values of entropy indicate the fluoride adsorption randomness characteristics at the zeolite-solution interface.

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Use of biokaolinite clay for the microbial removal of phenol from real industrial wastewater samples by Dermacoccus nishinomiyaensis and Kocuria rosea

Hassouna,

Abdel‐Tawab,

Abdel‐Aleem

2024

Environmental Quality Mgmt

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Phenol bioremediation was investigated using two bacteria (primarily cocci) Dermacoccus nishinomiyaensis, Kocuria rosea strains and the one actinomycetes Nocardiopsis lucentensis which were isolated from samples of activated sludge from the wastewater treatment plant (WWTP) in Beni‐Suef, Egypt as sole carbon and energy sources. This was applied on real industrial wastewater sample taken from Ul HAWA textile plant, Middle Egypt. Degradation of phenol by microbes adsorbed on natural kaolin clay was studied compared with free microbes. In case of 50 mg/L as starting phenol concentration, the percentage removal using free microbes was 68%, corresponding to 98% in case of microbes adsorbed on kaolin clay after the passage of 48 h under incubation at 30°C and neutral pH at 150 rpm. Also, 300 mg/L of phenol achieved degradation frequency of 80% compared to 38% after ≈48 h without clay addition. High concentrations of an organic pollutant are usually inhibitory for the microorganisms. Kaolin clay has a pronounced effect in accelerating phenol degradation through biofilm formation resulting in decreasing the degradation time, increasing the percentage of removing efficiency under high phenol concentration conditions due to its buffering effects on pH fluctuations of the degradation system. Kaolin clay protects microorganisms against unfavorable environment, resists the adverse effects of substrate inhibition and accelerates the degradation process. The adsorption process was demonstrated by the pseudo‐first‐order, pseudo‐second‐order, Weber–Morris adsorption kinetic models, and four isotherm models namely, Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich have been applied to express the adsorption process. The SEM images of microbes adsorbed on kaolin clay explain their adsorption mode on the clay surface as biofilm (Bio kaolinite).

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Evaluation of using clinoptilolite as a filter in drinking water wells for removal of lead (small-scale physical sand box model)

Cited by 8 publications

References 56 publications

Обзор Новых Конструктивных Решений Водозаборных Сооружений

Обзор Новых Конструктивных Решений Водозаборных Сооружений

Fluoride Adsorption from Aqueous Solution by Modified Zeolite—Kinetic and Isotherm Studies

Use of biokaolinite clay for the microbial removal of phenol from real industrial wastewater samples by Dermacoccus nishinomiyaensis and Kocuria rosea

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