We report electrochemical profiles from unvegetated surficial sediments of a Georgia salt marsh. In creek bank sediments, the absence of Sigma H2S or FeSaq and the presence of Fe(III)-organic complexes suggest that Mn and Fe reduction dominates over at least the top ca. 5 cm of the sediment column, consistent with other recent results. In unvegetated flats, accumulation of Sigma H2S indicates t...

Tris(3-aminopropyl)amine-based tripodal urea and thiourea receptors, tris([(4-cyanophenyl)amino]propyl)urea (L1) and tris([(4-cyanophenyl)amino]propyl)thiourea (L2), have been synthesized and their anion binding properties have been investigated for halides and oxoanions. As investigated by 1H NMR titrations, each receptor binds an anion with a 1:1 stoichiometry via hydrogen-bonding interaction...

Among the ions classified in Hofmeister series, firstly ranked divalent sulfate anion has strongest hydrating and water-structure making propensity. This unique characteristic actually makes it kosmotropic which causes water molecules to interact each other contributes gain structural stability of its hydrated clusters [SO42−(H2O)n]n = 1−40. In this study, few variably sized microhydrated 1−4, ...

A solid super acid WO3/SO42--ZrO2–TiO2 catalyst was prepared with adjustable acidity via double bridge connection strategy for oxidation of cyclohexene (CHE) to adipic (AA). XRD, SEM and N2 adsorption-desorption isotherm indicated that WO3 successfully decorated highly dispersed on SO42--ZrO2–TiO2 surface. An obvious stretching vibration peak (1125-1055 ​cm−1) in FT-IR illustrated effect betwee...

9 In some sour reservoirs and tertiary oil recovery blocks, SO42in solution can cause the corrosion 10 and corrosion fatigue of the sucker rods. In this paper, the corrosion behaviors of super-strength 11 sucker rod FG20 (16Mn2SiCrMoVTiA) steel in the well fluid are investigated by electrochemical 12 measurements, and electron probe micro-analyzer (EPMA) analysis. The results show that FG20 ste...

OBJECTIVES To assess cardiopulmonary morbidity associated with daily exposures to PM2.5 in Western Coast of Saudi Arabia. Methods: We monitored 24-h PM2.5 and its constituents including black carbon (BC), particulate sulfate (p-SO42-), nitrate (p-NO3-), ammonium (p-NH4+) and trace elements (TEs) at a site in Rabigh, Saudi Arabia from May to June 2013 with simultaneous collection of hospital dat...

本研究は、ケイ酸カルシウム水和物（C-S-H）の硫酸イオン（SO42－）収着および溶出性能を実験により評価し、その際のC-S-Hの化学的変化、具体的には固相組成および原子結合状態の変化を明らかにすることを目的として、合成C-S-Hを用いてSO42－の収着および溶出試験を実施した。その結果、Na2SO4とK2SO4のいずれを用いた場合でも、C-S-HのC/S比が高くなるとともにSO42－の収着量が増大した。また、C-S-Hに収着したSO42－は、Na＋が存在する高SO42－濃度下ではGypsum、K＋が存在する高SO42－濃度下ではSyngeniteとして固定化されることを明らかにした。さらに、上記の鉱物として固定された場合と、低SO42－濃度で鉱物として固定されていない場合のいずれについても、C-S-Hに収着したSO42－は溶出可能であるものと考えられた。