Chitosan-transition metal ions complexes for selective arsenic(V) preconcentration

Application of chitosan and its N-heterocyclic derivatives for preconcentration of noble metal ions and their determination using atomic absorption spectrometry

“…However, high affinity of chitosan and high selectivity of its chemically modified derivatives to many metal ions promote the interest to application of these materials to preconcentrate metal ions from wastewaters, natural waters, and biological and geological samples for subsequent analytical determination using atomic absorption spectrometry (ААS) (Suneetha, Kumar, Harinath, Reddy, & Seshaiah, 2012;Wan, Wang, & Qian, 2002;Wang, Li, Bao, Liu, & Liu, 2011), atomic emission spectrometry (ICP-AES) (Sabarudin, Oshima, Noguchi, & Motomizu, 2007), inductively coupled plasma-mass spectrometry (ICP-MS) (Katarina, Takayanagi, Oshima, & Motomizu, 2006;Sabarudin et al, 2007) and other techniques (Shinde et al, 2013).…”

Degradation of four organophosphorous pesticides catalyzed by chitosan-metal coordination complexes

“…Although different models were proposed to clarify the mechanism of coordination in the formation of complexes, the problem of the interaction of the metallic ions has not yet been solved (Varma et al 2004). Metal complexes of chitosan or its derivatives have showed a wide range of activities such as antimicrobial activities as well as the ability to remove contaminants from water; hence, they have proven to be useful in pharmaceutical, health care, and water treatment applications (Patale and Patravale 2011;Shinde et al 2013;Ma et al 2014). The study of the catalase-like activity of chitosanmetal complexes has received significant interest (Xiang et al 2010;Martina et al 2011;Demetgül 2012).…”

A review on detection of heavy metal ions in water – An electrochemical approach

“…Owing to oxidative stress by arsenic, reactive oxygen species (ROS), superoxide (O 2 − ), singlet oxygen ( 1 O 2 ), nitric oxide (NO . ), hydrogen peroxide (H 2 O 2 ), etc., [21,32,36,37] are generated. Generation of ROS leads to an imbalance in the levels of antioxidants which is a result of alterations that happen in signal cascade.…”