REMOVAL OF p-NITROPHENOL FROM AQUEOUS SOLUTIONS USING AMINOPROPYL SILICA GEL-IMMOBILIZED CALIX[4]ARENE POLYMER (C[4]APS)

Year 2015, Volume: 16 Issue: 2, 155 - 166, 14.11.2015

Vahti Aladağlı Farabi Temel , Mustafa Tabakcı

https://doi.org/10.18038/btd-a.12332

Cited By: 2

Abstract

This study describes the preparation of a new polymeric calix[4]arene derivative and its application as a sorbent material in adsorption of p-nitro phenol (PNP). Thus after the preparing of the precursor calixarene derivatives (1-5), compound 5 was immobilized onto aminopropyl silica gel supporting material to obtain polymeric calix[4]arene (6). All compounds were characterized by using some methods such as FTIR, ¹H NMR, elemental analysis, TGA and SEM. Aminopropyl silica gel-immobilized calix[4]arene (C[4]APS) 6 was used as a sorbent in the adsorption studies of PNP and it was examined some parameters such as pH, contact time, initial concentration, process temperature and sorbent dosage. The results showed that pH 6, contact time 1 hour, the concentration of 5.0x10^-5 M PNP, 0.025 g of sorbent dosage and 25^oC of temperature was found as optimum parameters of PNP adsorption by 6. Also Langmuir and Freundlich isotherms were evaluated to clarify the PNP adsorption mechanism.

Keywords

Aminopropyl silica gel (APS); Adsorption; p-Nitro phenol (PNP), Polymeric calix[4]arene.

AMİNOPROPİL SİLİKAJEL İMMOBİLİZE KALİKS[4]AREN POLİMERİ (K[4]APS) KULLANILARAK p-NİTROFENOLÜN SULU ÇÖZELTİLERDEN GİDERİMİ

Abstract

Bu çalışma yeni polimerik kaliksaren türevinin hazırlanması ve p-nitrofenolün (PNF) adsorpsiyonunda sorbent malzemesi olarak uygulanmasını içermektedir. Kaliksaren türevleri 1-5'in hazırlanmasından sonra, 5 no'lu moleküle aminopropil silika jel destek maddesi tutturularak polimerik kaliksaren 6 türevi elde edildi. Bütün bileşikler, FTIR, 1H NMR, elemental analizi, TGA ve SEM gibi metotlar kullanılarak karakterize edildi. Aminopropil silika jel immobilize kaliks[4]aren (K[4]APS) 6, PNF adsorpsiyonu çalışmalarında sorbent olarak kullanılmış ve pH, etkileşim süresi, konsantrasyon, proses sıcaklığı ve sorbent dozajı gibi parametreler çalışıldı. Sonuçlara göre, 6 no'lu molekülün PNF adsorpsiyonu için optimum koşullar pH 6, etkileşim süresi 1 saat, PNF konsantrasyonu 5.0x10-5 M, sorbent dozajı 0.025g ve proses sıcaklığı 25oC olarak bulundu. PNF adsorpsiyon mekanizması, Langmuir ve Freundlich izotermleri ile değerlendirildi

Keywords

Aminopropil silika jel (APS), Adsorpsiyon, p-nitrofenol (PNF), Polimerik kaliks[4]aren

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