Modified alginate beads as biosensor and biosorbent for simultaneous detection and removal of cobalt ions from aqueous solution

Abstract

A novel biomaterial was prepared to simultaneously detect and remove cobalt ions from aqueous solution by modifying alginate (AG) polymer with a high selectivity and sensitive indicator for Co , the color of the modified AG beads changed from yellow to pink, resulting in a noticeable change, which can be observed by naked eyes. The adsorption of Co 21 by the modified AG beads can be described by pseudo second-order kinetic model and the Freundlich isotherm model. The AG bead modified with an indicator is a promising biosensor and biosorbent for simultaneous detection and removal of cobalt ions from aqueous solution.

Alginate Bead Biosystem for the Determination of Lactate in Sweat Using Image Analysis

“…One of the possible biomaterials that could be employed to this end is alginate, a natural anionic polymer that can be found in brown algae and is composed of 1,4-linked α-L-guluronate and β-D-mannuronate residues arranged in linear copolymer blocks [20]. The biocompatibility, non-immunogenicity, porosity, viscosity and relatively low cost as well as gelation required to form dimension-controlled hydrogels of alginate make it an appropriate material to be used in a wide variety of fields, such as tissue engineering (e.g., scaffold for organ-on-a-chip, wound dressing), biomedical applications, drug delivery, food industry and environmental analysis (e.g., water analysis) [21][22][23].…”

“…In this regard, Márquez A. et al [25] developed a point-of-care amperometric biosystem using a biocompatible alginate hydrogel matrix for glucose sensing in blood, and Zhuang, S. and Wang, J. [22] fabricated alginate beads modified with an indicator of Co 2+ capable of effectively detecting Co 2+ in aqueous solutions as an environmental analysis tool. Recently, our group has developed an alginate/titanium dioxide nanotubes nanocomposite for the detection of lactate and glucose [26].…”

Yeşi̇l Bayburt Taşinin Adsorban Olarak Kullanilabi̇li̇rli̇ği̇ni̇n İstati̇sti̇ksel Deney Tasarimi İle İncelenmesi̇

“…Kabul edilebilir seviyelerde kobalt canlılar için önemli olup yüksek konsantrasyonlarda zehirleyici etkilere neden olabilmektedir. Bu nedenle, diğer ağır metallerde olduğu gibi kobaltın da sucul ortamdan ve atık sulardan uzaklaştırılması gerekmektedir [2,7].…”

“…Bu kapsamda ANOVA analizi yapılmış ve parametrelerin adsorpsiyon üzerindeki etkileri S/N (dB) bazında değerlendirilmiştir. Buna göre; ortalama S/N (dB) oranlarının en yüksek değerlerinin alınmasıyla elde edilen optimum değerler incelendiğinde; pH'nın üçüncü seviyesi olan A3'ün (7), başlangıç metal konsantrasyonun yine üçüncü değeri olan B3'ün (500 mg/L) adsorban miktarının ise birinci çalışma değeri olan C1'in (0,250 gr) en iyi sonucu verdiği görülmüştür. Ancak gerçekleştirilen ANOVA analizleri neticesinde yeşil Bayburt taşı üzerinde Co(II) adsorpsiyonunda çalışılan parametrelerin faktör etkisi (%) bazında başlangıç metal konsantrasyonun %41,98 ve adsorban miktarının ise %41,91 değerlerine sahip olduğu tespit edilmiştir.…”

A novel method for the estimation of cobalt (II) in practical samples using ammonium pyrollidine dithiocarbamate

“…Cobalt is an essential trace element for the living organisms since it is a part of vitamin B 12 or cyanocobalamine . Deficiency of cobalt may cause thalassemia, sickle cell anemia, hematological, and polycythemia disorders .…”