Aqueous mercury precipitation with the synthetic dithiolate, BDTH2

Blue, Lisa Y.; Jana, Partha P.; Atwood, David A.

doi:10.1016/j.fuel.2009.10.031

Cited by 64 publications

(32 citation statements)

References 38 publications

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“…1. Compound 14 is obtained from the reaction of 1,3-benzenediamidoethanethiol (BDTH 2 ) with HgCl 2 in water leading to BDT-Hg 14, 66 which is known to provide an excellent means to remove mercury permanently from water. A similar reaction of bisaminoethanthiol BDETH 2 with HgCl 2 yields BDET-Hg 15.…”

Section: Resultsmentioning

confidence: 99%

Development and application of the analytical energy gradient for the normalized elimination of the small component method

Zou

Filatov

Cremer

2011

The Journal of Chemical Physics

107

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The analytical energy gradient of the normalized elimination of the small component (NESC) method is derived for the first time and implemented for the routine calculation of NESC geometries and other first order molecular properties. Essential for the derivation is the correct calculation of the transformation matrix U relating the small component to the pseudolarge component of the wavefunction. The exact form of ∂U/∂λ is derived and its contribution to the analytical energy gradient is investigated. The influence of a finite nucleus model and that of the picture change is determined. Different ways of speeding up the calculation of the NESC gradient are tested. It is shown that first order properties can routinely be calculated in combination with Hartree-Fock, density functional theory (DFT), coupled cluster theory, or any electron correlation corrected quantum chemical method, provided the NESC Hamiltonian is determined in an efficient, but nevertheless accurate way. The general applicability of the analytical NESC gradient is demonstrated by benchmark calculations for NESC/CCSD (coupled cluster with all single and double excitation) and NESC/DFT involving up to 800 basis functions.

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Section: Resultsmentioning

confidence: 99%

Development and application of the analytical energy gradient for the normalized elimination of the small component method

Zou

Filatov

Cremer

2011

The Journal of Chemical Physics

107

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“…Therefore, it is necessary for public health and ecological safety to remove mercury and cadmium from wastewater. Numerous techniques have been applied for the removal of hazardous heavy metal ions from aqueous solutions, such as chemical precipitation (Blue et al 2010), ion exchange (Noh and Komarneni 2011), membrane separation (Cui et al 2014), reduction (Ketir et al 2008), electrochemical treatment (Pikna et al 2015), and adsorption. Adsorption is one of the most studied methods due to its high efficiency, easy handling, low cost of the materials, and reversibility.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands

Zhang

Luo

2016

BioResources

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aTo enhance the removal of mercury (Hg(II)) and cadmium (Cd(II)) from aqueous solutions, rice bran (RB) was reacted with epichlorohydrin and then modified with ethylenediamine and sodium chloroacetate to bear iminodiacetate functional groups. The modified rice bran (MRB) was characterized by Fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), energy dispersive spectroscopy (EDS), back titration, and X-ray photoelectron spectroscopy (XPS). The adsorption properties of MRB for Hg(II)/Cd(II) ions were also evaluated in batch experiments. The sorption kinetic experimental data were best described by the pseudo-second-order model. The maximum adsorption capacity (163.9 mg/g for Hg(II) at pH 5.0 and 106.4 mg/g for Cd(II) at pH 6.0) was observed at 298 K, and the isotherm adsorption equilibrium of MRB was followed by Langmuir isotherm equation. The major adsorption mechanisms should be predominantly controlled by the formation of complexes between the functional groups of MRB and Hg(II)/Cd(II) ions as well as ion-exchange. The regeneration experiments showed that the MRB could be successfully reused for six cycles when 0.1 M HCl eluent was used.

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“…Furthermore, in the last few years, many approaches have been employed for the removal of heavy metals from aqueous phases, such as chemical precipitation, oxidation/reduction sedimentation, ion exchange, biosorption, membrane filtration, and solid phase extraction [22][23][24][25][26]. Although these methods have been proved to be practically feasible in some degree, they also possess several non-ignorable restrictions such as complicated sample preparation processes, high operation costs, sophisticate instrumentation, and so on.…”

Section: Introductionmentioning

confidence: 99%

A reusable naphthalimide-functionalized magnetic fluorescent nanosensor for the simultaneous determination and removal of trace Hg2+ in aqueous solution

Zhao

Zhu

et al. 2013

Journal of Colloid and Interface Science

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Aqueous mercury precipitation with the synthetic dithiolate, BDTH2

Cited by 64 publications

References 38 publications

Development and application of the analytical energy gradient for the normalized elimination of the small component method

Development and application of the analytical energy gradient for the normalized elimination of the small component method

Enhanced Adsorption of Mercury(II) and Cadmium(II) from Aqueous Solution onto Rice Bran Modified with Chelating Ligands

A reusable naphthalimide-functionalized magnetic fluorescent nanosensor for the simultaneous determination and removal of trace Hg2+ in aqueous solution

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