Synthesis and metal ions sorption properties of styrene‐based polymers

Abstract

Atactic polystyrene (PS) was chemically modified with maleic (MAH), succinic (SAH), and phtalic (PhAH) anhydrides. Styrene was copolymerized with acrylic (AA) and methacrylic acids (MA). Amount of carboxyl groups (%) bound to polymers was determined in the range of 6.9-25.9. Different modified polystyrenes (MPS) and styrene copolymers were used in the experiments to study Cu(II) and Zn(II) ions adsorption probability and their comparison. Sorption capacity of the polymers for the metal ions were investigated in aqueous media containing different amounts of these ions (5-40 mg/L) and at different pH values (2.0-6.0). Adsorption behavior of heavy metal ions could be modeled using both the Langmuir and Freundlich isotherms. It was found that the adsorption capacity is highest at pH value of 6, whereas it decreases as the pH value decreases at temperature 25C AE 1 C for 240 min. The results obtained from the adsorption capacity experiments for Cu(II) and Zn(II) ions were 3. 47-5.45 and 5.42-6.85 mg/g, respectively. The affinity order of polymers for both metal ions was observed as follows: SMAC > SAAC > MPS with MAH > MPS with SAH > MPS with PhAH. The maximum adsorption capacities of SMAC were 6.85mg/g for Zn(II) and 5.45 mg/g for Cu(II).

Study of Konjac Glucomannan Esterification with Dicarboxylic Anhydride and Effect of Degree of Esterification on Water Absorbency

“…Water is a good solvent for KGM, however, it hardly reacts with other materials due to the intricate association among KGM and a network of inter-and intra-molecular hydrogen bonds joined by the individual long chains. A suitable swelling agent can disrupt the association among the KGM and break down the strong intraand inter-molecular hydrogen bonds to enhance its reaction activity [11][12]. In the present study, HAc serves as a swelling agent and co-solvent with water.…”

SDS-coated Sepabeads SP70-modified by 4-[(E)-3-phenylallylidene) amino] benzenethiol as new efficient solid phase for enrichment and determination of copper, nickel, chromium, and zinc ions in soil, plants, and mint water samples

“…The determination of traces of heavy metal ions in environmental samples is restricted by the very low concentration of heavy metal ions which may be lower than the detection limit of flame atomic absorption spectrometry (FAAS) as traditional low cost and measuring instrument accessible and the interfering effects of the matrix components (Wong et al 2009;Sahmoune et al 2009;El-Menshawy and El-Asmy 2009;SzymczychaMadeja and Mulak 2009;Minareci et al 2009;Mansouri and Cauli 2009;Ouzouni et al 2009;Jamali et al 2008;Silva et al 2009). In order to cope with these limitations and achieve accurate, reliable, and sensitive results especially for too low concentration of analyte in real samples required preconcentration and separation methods (Tuzen and Soylak 2006;Ghaedi et al 2005;Deveci et al 2009;Ghaedi et al 2007b;Zhang et al 2009;Zolfonoun et al 2008;Soylak et al 1995;Moghimi et al 2009;Quintelas et al 2009;Ghaedi 2006;Niskavaara and Kontas 1990;Hiratani et al 1997;Hossain and Honjo 1998;Comitre and Reis 2005;Ghaedi et al 2009a, b).…”

Novel negatively charged hybrids. 2. Preparation of silica‐based hybrid copolymers and their applications for Cu2+ removal

“…With the wide application of copperplating technology and copperware, water pollution caused by Cu 2+ ions has deserved escalating interest due to their negative effects on the environment and human health. To remove this toxic pollutant from waste water, a variety of methods have been developed in the past 1–3. Among them, adsorption using hybrid materials with functional groups is considered as one of the most effective and versatile methods in that the metal ions can be bonded to the organic polymer/inorganic hybrids 4–6.…”