Aqueous arsenic and sulfur speciation analysis and solid phase characterization in the dissolution of arsenic trisulfide

2021 ◽  
Vol 199 ◽  
pp. 105545
Author(s):  
Mohamad Mirazimi ◽  
Wenying Liu
Keyword(s):  
Solid Phase ◽  
Speciation Analysis ◽  
Arsenic Trisulfide ◽  
Sulfur Speciation ◽  
Phase Characterization

scholarly journals Mercury determination and speciation analysis in surface waters

2012 ◽  
Vol 10 (4) ◽  
pp. 1175-1182 ◽  
Author(s):  
Elisaveta Mladenova ◽  
Ivanka Dakova ◽  
Dimiter Tsalev ◽  
Irina Karadjova
Keyword(s):  
Surface Waters ◽  
Inductively Coupled Plasma ◽  
Mechanical Stability ◽  
Solid Phase ◽  
Chemical Vapor ◽  
Speciation Analysis ◽  
Regeneration Ability ◽  
Mercury Species ◽  
Icp Ms ◽  
Relative Standard

AbstractA sorbent L-cysteine grafted silica gel has been evaluated for separation and enrichment of dissolved inorganic i-Hg(II) and methylmercury CH3Hg(I) from surface waters at sub-µg L−1 concentrations. Chemical parameters for mercury species enrichment and separation have been optimized. Analytical schemes for the determination of Hg species, using selective column solid phase extraction (SPE) with continuous flow chemical vapor generation atomic absorption spectrometry (CF-CVG-AAS) or inductively coupled plasma-mass spectrometry (ICP-MS) were developed. Possibilities for on-site SPE enrichment were demonstrated as well. The limits of quantification were 1.5 and 5 ng L−1 for dissolved i-Hg(II) and CH3Hg(I) by CF-CVG-AAS and 1 and 2.5 ng L−1 by ICP-MS with relative standard deviations between 7–12% and 7–14%, respectively. The chemically modified SPE sorbent has demonstrated high regeneration ability, chemical and mechanical stability, acceptable capacity and good enrichment factors. Results for total dissolved mercury were in reasonable agreement with those from independent analyses by direct ICP-MS determinations for river waters and for estuarine water certified reference material.

scholarly journals Sequential extraction and thermal desorption of mercury from contaminated soil and tailings from Mongolia

2012 ◽  
Vol 10 (5) ◽  
pp. 1565-1573 ◽  
Author(s):  
Pavel Coufalík ◽  
Pavel Krásenský ◽  
Marek Dosbaba ◽  
Josef Komárek
Keyword(s):  
Sequential Extraction ◽  
Thermal Desorption ◽  
Solid Phase ◽  
Extraction Procedure ◽  
Speciation Analysis ◽  
Water Soluble ◽  
Mercury Species ◽  
Different Temperatures ◽  
Acidic Conditions ◽  
Desorption Method

AbstractMercury forms in contaminated environmental samples were studied by means of sequential extraction and thermal desorption from the solid phase. The sequential extraction procedure involved the following fractions: water soluble mercury, mercury extracted in acidic conditions, mercury bound to humic substances, elemental Hg and mercury bound to complexes, HgS, and residual mercury. In addition to sequential extraction, the distribution of mercury species as a function of soil particles size was studied. The thermal desorption method is based on the thermal decomposition or desorption of Hg compounds at different temperatures. The following four species were observed: Hg0, HgCl2, HgS and Hg(II) bound to humic acids. The Hg release curves from artificial soils and real samples were obtained and their applicability to the speciation analysis was considered.

Solid phase characterization and transformation of illite mineral with gas-phase ammonia treatment

2021 ◽  
pp. 127657
Author(s):  
Silvina A. Di Pietro ◽  
Hilary P. Emerson ◽  
Yelena Katsenovich ◽  
Timothy J. Johnson ◽  
Ryan M. Francis ◽  
...  
Keyword(s):  
Gas Phase ◽  
Solid Phase ◽  
Ammonia Treatment ◽  
Phase Characterization

scholarly journals Synthesis of MoS2 nanosheets for mercury speciation analysis by HPLC-UV-HG-AFS

RSC Advances ◽  
2018 ◽  
Vol 8 (33) ◽  
pp. 18364-18371 ◽  
Author(s):  
Xingsu Gao ◽  
Jiayong Dai ◽  
Hongyan Zhao ◽  
Jun Zhu ◽  
Lan Luo ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Molybdenum Disulfide ◽  
Solid Phase ◽  
Speciation Analysis ◽  
Mercury Speciation ◽  
Phase Extraction ◽  
Mos2 Nanosheets ◽  
Ultra Trace ◽  
Molybdenum Disulfide Nanosheets ◽  
As Solid Phase

As-synthesized few-layered molybdenum disulfide nanosheets were used as solid-phase extraction absorbent for ultra-trace mercury speciation analysis by HPLC-UV-HG-AFS.

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