Nano-chamomile waste as a low-cost biosorbent for rapid removal of heavy metal ions from natural water samples

Tailings generated from mineral processing have attracted worldwide concerns due to creating serious environmental pollution. In this work, porous adsorbents were prepared as a porous block by using silicate tailings, which can adsorb heavy metal ions from the solution and are easy to separate. The synthesized silicate porous material (SPM) was characterized by X-ray diffraction (XRD), Brunner–Emmet–Teller (BET), and scanning electron microscope (SEM). The material presented a surface area of 3.40 m2⸱g−1, a porosity of 54%, and the compressive strength of 0.6 MPa. The maximum adsorption capacities of Pb2+, Cd2+, and Cu2+ by SPM were 44.83 mg·g−1, 35.36 mg·g−1, and 32.26 mg·g−1, respectively. The experimental data were fitted well by the Freundlich and Langmuir adsorption models. The kinetics of the adsorption process were fitted well by the pseudo-first order kinetic equation. These results show that the porous materials prepared with silicate tailings could act as an effective and low-cost adsorbent for the removal of heavy metal ions from wastewater. This study may provide a new thought on the high-value utilization of tailing for alleviating environmental pressure.

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Fast and sensitive determination of heavy metal ions as batophenanthroline chelates in food and water samples after dispersive micro-solid phase extraction using graphene oxide as sorbent

Microchemical Journal ◽

10.1016/j.microc.2019.03.013 ◽

2019 ◽

Vol 147 ◽

pp. 30-36 ◽

Cited By ~ 15

Author(s):

Barbara Feist ◽

Rafal Sitko

Keyword(s):

Heavy Metal ◽

Graphene Oxide ◽

Solid Phase Extraction ◽

Metal Ions ◽

Water Samples ◽

Heavy Metal Ions ◽

Solid Phase ◽

Phase Extraction ◽

Sensitive Determination

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Study on the Performance of the Ionic Liquids [Emim]CH3SO3 and [Emim]PF6 to Prepare the Biosensor of the Detection of Heavy Metals in Seawater

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v20i1.288 ◽

2017 ◽

Vol 20 (1) ◽

pp. 013-020 ◽

Cited By ~ 1

Author(s):

Xuhui Ma ◽

Shipeng Zhao ◽

Shuping Zhang

Keyword(s):

Heavy Metal ◽

Ionic Liquid ◽

Ionic Liquids ◽

Metal Ions ◽

Heavy Metal Ions ◽

Electrochemical Sensors ◽

Low Cost ◽

Sensor Applications ◽

Electrochemical Window ◽

Significant Difference

Electrochemical sensors can detect the heavy metal ions in seawater quickly, conveniently and accurately with the advantages such as the fast detection speed, the simple operability and the low cost. The ionic liquid [Emim]CH3SO3 showed excellent electrochemical performance and could meet the initial application requirements as electrochemical sensors. The characters of the ionic liquids [Emim]CH3SO3 and [Emim]PF6 which include IR, LC-MS, conductivity, electrochemical window and viscosity were detected. The influ-ence of trace impurity on the conductivity of the ionic liquids was investigated. Results suggested that the conductivity of the ionic liquids increased with the concentration of the added organic solvents. In addition, though the conductivity of the ionic liquids increased with temperature, there is no significant difference in the influence of the same impurity at varying temperatures. Muti Walls Carbon Nanotubes (MWCNTs) are appropriate materials which are commonly used materials for electrochemical sensor applications. The effect of theImidaz-olium-based ionic liquids on the performance of the conductivity of the MWCNTs was studied. It was found that Ionic liquid is an excellent extraction agent for metal ions and its presence in the sensor system improves significantly the detection of heavy metal ions.

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