Temat: fuchsin - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Immobilization of rambutan (Nephelium lappaceum) peel as a sorbent for Basic Fuchsin removal
Autorzy:: Lee, H.-J.
Ong, S.-T.
Powiązania:: https://bibliotekanauki.pl/articles/207651.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: fuchsin
Fourier transform infrared spectrophotometry
FTIR
Nephelium lappaceum
fuksyna
spektroskopia w podczerwieni z transformatą Fouriera
Opis:: The potential of rambutan (Nephelium lappaceum) peel as a low-cost adsorbent in an immobilized condition to remove Basic Fuchsin from aqueous solution was studied. The effect of initial dye concentration, contact time, pH and adsorbent dosage for the dye removal was studied at room temperature (26±2 °C). Infrared spectrum of rambutan peel indicates the presence of C–O, –OH and C=C functional groups. The adsorption rate was found to be high at the first 30 min and the process reached equilibrium after 3 h with more than 80% of dye being removed. The uptake of Basic Fuchsin was more promising at pH slightly above 7. The study of sorption model and kinetic model showed that the adsorption of Basic Fuchsin on rambutan peel conformed to the Freundlich isotherm and pseudo-second order kinetics with a high correlation coefficient, R,sup>2 > 0.98. This indicates the Basic Fuchsin adsorbs chemically on the heterogeneous surface of rambutan peel. The maximum adsorption capacity determined from the Langmuir isotherm was 108.696 mg/g. It seems that rambutan peel has the potential to substitute activated carbon as an alternative low-cost adsorbent in the treatment of the dye effluent.
Źródło:: Environment Protection Engineering; 2017, 43, 1; 169-181
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Adsorpcja czerwieni kwasowej 114 i fuksyny zasadowej z roztworów wodnych na mezoporowatych materiałach węglowych
Adsorption of Acid Red 114 and Basic Fuchsin from Aqueous Solutions on Mesoporous Carbon Materials
Autorzy:: Jedynak, K.
Repelewicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/297009.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: acid red 114
basic fuchsin
adsorption
mesoporous carbon materials
czerwień kwasowa 114
fuksyna zasadowa
adsorpcja
mezoporowate materiały węglowe
Opis:: In this work the adsorption of basic fuchsin and acidic red on mesoporous carbon materials C-KS and C-KC was examined. Carbon materials were obtained applying softtemplating method in environment of hydrochloric acid and citric acid. For examined adsorbents low-temperature nitrogen adsorption isotherms were determined, used next for porous structure parameters calculations. Obtained isotherms can be categorized as IV type according to IUPAC classification. Studied adsorbents have large surface area S_BET: 650 m²/g (C-KS) and 760 m²/g (C-KC); large total pore volume Vt: 0.59 cm³/g (C-KC) and 0.89 cm³/g (C-KS). Mesopores participation in total porosity of examined carbons is 83% for C-KS and 71% for C-KC. This confirms that examined carbons are mesoporous materials with significant advantage of mesoporosity over microporosity. Mesopores dimension, for maximum of distribution function (in the mesopores range) were estimated using Kruk- Jaroniec-Sayari (KJS) method. Mesopores dimension for C-KC carbon is 6 nm and for C-KS carbon is 8.7 nm. Adsorbates concentrations, before and after adsorption, were estimated using spectrophotometric method. Adsorption studies were carried out at 25°C. The adsorption equilibrium for studied mesoporous systems: carbon material - dye solution, was achieved after 8 hours. Studies of the adsorption process kinetics showed that in three cases adsorption kinetics proceeded in compliance with model of apparent II order of reaction: C-KC (acidic red 114) and C-KS (basic fuchsin and acidic red 114). In one case adsorption kinetics proceeded in compliance with model of apparent I order of reaction: C-KC (basic fuchsin). Obtained adsorption isotherms were applied to Langmuir and Freundlich equations. Adsorption process of fuchsin on both examined carbons and adsorption of acidic red on C-KC carbon was carried out in agreement with adsorption model described by Langmuir equation. However, acidic red adsorption on C-KC carbon is better described by Freundlich adsorption model. Adsorption abilities, of examined mesoporous carbon materials, are significantly higher in relation to fuchsin than to acidic red 114; e.g. for C-KS adsorbent, it is 1.289 mg/g (acidic red 114) and 10.661 mg/g (fuchsin). Applying K constant value from Langmuir equation, free enthalpy >G was calculated. Obtained values change in range of –25 to –34 kJ/mol. Negative values of >G show that studied adsorption process is spontaneous.
Celem pracy było zbadanie kinetyki adsorpcji oraz wyznaczanie izoterm adsorpcji czerwieni kwasowej 114 i fuksyny zasadowej z roztworów wodnych na zsyntezowanych metodą miękkiego odwzorowania mezoporowatych materiałach węglowych C-KS oraz C-KC. W trzech przypadkach kinetyka adsorpcji przebiegała zgodnie z modelem pseudo II - rzędu: C-KC (czerwień kwasowa 114) oraz C-KS (czerwień kwasowa 114 i fuksyna zasadowa), w jednym zgodnie z modelem pseudo I - rzędu: C-KC (fuksyna zasadowa). Równowaga adsorpcyjna ustaliła się we wszystkich badanych przypadkach po 8 h. Adsorpcja w warunkach równowagowych została opisana za pomocą równań Langmuira i Freundlicha. W trzech przypadkach adsorpcja barwników zachodziła zgodnie z modelem Langmuira, w jednym opisana została przez równanie Freundlicha - C-KC (czerwień kwasowa 114).
Źródło:: Inżynieria i Ochrona Środowiska; 2016, 19, 2; 227-239
1505-3695
2391-7253
Pojawia się w:: Inżynieria i Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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