2 research outputs found

    The investigation on Pb2+ and Cu2+ ions on bentonite

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    Przeanalizowano mo偶liwo艣膰 usuwanie jon贸w Pb2+ oraz Cu2+ z wodnego roztworu poprzez sorpcj臋 bentonitu i modyfikacj臋 jego w艂a艣ciwo艣ci. Pr贸bk臋 bentonitu pobrano ze z艂o偶a Branany - Cerny Vrch w Republice Czeskiej. Pr贸bka by艂a g艂贸wnie z艂o偶ona z montmorillonitu, kwarcu i syderytu. Aby poprawi膰 jego w艂a艣ciwo艣ci sorpcyjne modyfikowano je poprzez interkalacj臋 (z u偶yciem octadecylaminy) oraz nitryfikacj臋 (roztworem 1M NaCl). Do opisu sorpcji wykorzystano modele Langmuira i Freundlicha zaadaptowane dla izoterm sorpcji Pb2+ oraz Cu2+ na czystym bentonicie i pr贸bkach zmodyfikowanych.The removal of Pb2+ and Cu2+ from aqueous solutions by sorption onto bentonite and its modification was investigated. The bentonite sample was taken from the Branany - Cerny Vrch locality in the Czech Republic. This sample was mainly composed of montmorillonite, quartz and siderite; to improve its sorption properties it was modified by intercalation (by octadecylamine) and nitrification (by 1M NaCl). The Langmuir and Freundlich models were adopted to describe the sorption isotherms of Pb2+ and Cu2+ adsorption on the raw bentonite and modified samples

    Zastosowanie bentonitu i jego modyfikacji do procesu sorpcji

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    The problem of removing pollutants from water is an important process and is becoming more important with the increase of industrial activities. There are several methods to treat metal contaminated effluent. Adsorption is one of the more popular methods for the removal of heavy metals from wastewater. Low cost adsorbents are preferred in the purification process. For this reason, industrial wastes and mining by-products are used. Bentonite is a raw material extracted during brown coal mining in the Czech Republic. Bentonite has optimal sorption properties for its use as an adsorbent. This approach ensures the improvement of the economic effectiveness of mining and helps prevent its accumulation in the environment. Intercalation with octadecylamine in different weight ratios and natrification by 1M solution of sodium chloride were used for improving the sorption properties (the interlayer space, surface area, ion-exchange capacity) of bentonite sample. Prepared materials - modified samples of bentonite and its raw form - were tested as potential adsorbents for heavy metals adsorption. This paper summarizes the results of lead and copper adsorption on a raw bentonite sample and its modifications. These samples were used for the adsorption of Pb2+ and Cu2+ from the synthetically prepared waste water.Badania dotyczy艂y mo偶liwo艣ci usuwania jon贸w Pb2+ and Cu2+ z roztwor贸w wodnych w procesie sorpcji na bentonicie oraz mo偶liwo艣ci modyfikacji tego procesu. Pr贸bki bentonitu pochodzi艂y ze z艂o偶a Branany - Cerny Vrch w Republice Czeskiej. Pr贸bki sk艂ada艂y si臋 g艂贸wnie z montmorylonitu, kwarcu i syderytu; w艂a艣ciwo艣ci sorpcyjne by艂y modyfikowane w procesie interkalacji (kompleksowanie za pomoca octadecylaminy) oraz za pomoc膮 1M NaCl. Dla opisu procesu sorpcji wykorzystano modele Langmuira i Freundlicha opisuj膮c izotermy sorpcji Pb2+ i Cu2+ na pr贸bkach bentonitu surowego i modyfikowanego
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