Synthesis of Poly(2-aminothiazole) for Selective Removal of Hg(II) in Aqueous Solutions

Abstract

Conducting poly(2-aminothiazole) (PAT) was simply green synthesized by a chemical oxidation method using 2-aminothiazole as the monomer and copper chloride as the oxidant in aqueous solution. The effects of reaction time and oxidant/monomer molar ratio on the polymerization yield were investigated. The PATs were characterized by FT-IR, 1 H NMR, UV−vis, gel permeation chromatograms (GPC), and scanning electron microscopy (SEM). A series of adsorption experiments were carried out to investigate the adsorption properties of PAT for different heavy metals ions. The results suggested that the PAT possessed much better adsorption capability for Hg(II) than other metal ions. The effects of pH, contact time, and adsorption temperature on the adsorption of Hg(II) were evacuated. The maximum adsorption capacity obtained was 325.7 mg/g at 308 K from the Langmuir model. The adsorption mechanism was studied by FT-IR, UV−vis, and XPS. The polymer could be further regenerated through desorption of Hg(II) using HNO 3 or HCl eluent.

Green Preparation of Nanoporous Pyrrhotite by Thermal Treatment of Pyrite as an Effective Hg(Ⅱ) Adsorbent: Performance and Mechanism

“…The characteristic absorbance lines at 1076 cm −1 and 483 cm −1 are assigned to pyrrhotite. The peak at 3649 cm −1 refers to the −OH vibrations [12,35]. The characteristic absorbance peak at 3649 cm −1 of MPy-600-Hg(II) is higher, which can be ascribed to the formation of ferric hydroxide from the dissolution of iron, and more Hg(OH) 2 is formed by attracting more −OH molecules to Hg(II) [36].…”

“…Among them, adsorption methods have been widely studied because they are cost-effective, environmentally friendly, and easy to conduct. Numerous adsorbents have been extensively studied, such as activated carbon [9,10], lichens [11], amine-modified attapulgite [8], poly(2-aminothiazole) [12], and mesoporous silica [5]. However, those adsorbents are either too costly or have low adsorption capacity.…”

Microwave Assisted Synthesis of Polyvinylbutyral‐silica Composites for Mercury Removal Application

“…Hg(II) is a metal, needing a serious concern due to its toxicity which may induces disaster in public health as it has already performed a tragedy in Japan and Iraq[ 7] . The severeness of damages caused by mercury is somewhat because of its easy migration, bio‐toxicity and bioaccumulation ,. Human contact with mercury is generally occurred by inhaling elemental mercury through exposure of dental amalgam or absorption of mercury bonded with organic moieties or consumption of fresh or salt water fishes containing methylmercury …”

Electrospun poly(2‐aminothiazole)/cellulose acetate fiber membrane for removing Hg(II) from water

“…AT‐based heavy metal ion adsorbents (e.g., AT‐modified SiO 2 gel and AT‐functionalized polystyrene) have been reported earlier, probably owing to the substantially higher S and N ratio (30 mol %) in AT compared with that in aniline (7 mol %) and pyrrole (10 mol %). In our previous study, chemically synthesized PAT was applied to Hg(II) adsorption for the first time. However, the powdered material used is relatively difficult to handle and recycle.…”