Chemical composition and source apportionment of rainwater at Guiyang, SW China

Xiao, Hao; Xiao, Huayun; Long, Aimin; Wang, Yanli; Liu, Cong‐Qiang

doi:10.1007/s10874-013-9268-3

Cited by 73 publications

(70 citation statements)

References 29 publications

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“…According to initial NH 3 concentrations and cloud base height, the atmospheric NH 3 deposition was estimated to be 38.1 kg/ha/year in Guiyang, close to the results of 30.2 kg/ha/year (maximum value of 44.7 kg/ha/year) reported by Liu et al (2008). The contribution of wet deposition to the total ammonium deposition was 49% in Guiyang (Xiao and Liu, 2011), and the ammonium concentration in rainwater was 112.9 μeq/L and the amount of rainfall was 1174 mm (Xiao et al, 2012(Xiao et al, , 2013, resulting in an atmospheric NH 3 deposition of 36.7 kg/ha/year. The estimated δ 15 N values ranged from −8.1‰ to −43.9‰, with an average of −16.8 ± 4.9‰ in gaseous ammonia, close to the δ 15 N values (−15.9‰) of ammonium in rainwater in Guiyang (Xiao et al, 2012).…”

Section: Results Of Rayleigh Modelsupporting

confidence: 76%

“…The contribution of ammonia volatilization is higher from wastes of domestic animal than from fertilizer use in China because domestic animal production has increased greatly since the late 1980s (Bouwman et al, 2002;Xiao et al, 2012Xiao et al, , 2013Liu et al, 2013). In Guiyang, southwest China, for example, the ammonium concentration has increased about for 1.8 times from 1984 to 2009 in rainwater (Galloway et al, 1987;Xiao et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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δ15N–NH4+ variations of rainwater: Application of the Rayleigh model

Xiao

Long

et al. 2015

Atmospheric Research

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Section: Results Of Rayleigh Modelsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

δ15N–NH4+ variations of rainwater: Application of the Rayleigh model

Xiao

Long

et al. 2015

Atmospheric Research

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“…Φ S was the fluorescent quantum yield of these porphyrins, F was the integration of the emission intensities, and A was the absorbance at 418 nm. 57,58 The Φ S values of H 2 P 1 , H 2 P 2 , ZnP 1 , and ZnP 2 in DMSO were 0.0264, 0.0316, 0.0261, and 0.0312, respectively. The Φ S values of ZnP 1 and ZnP 2 were smaller than those of H 2 P 1 and H 2 P 2 .…”

Section: Bulletin Of the Korean Chemical Societymentioning

confidence: 97%

Synthesis of Tailed Metalloporphyrins Modified with 2‐Chloronicotinic Acid and Interactions with Human Serum Albumin

Wang

Peng

Zhang

et al. 2017

Bulletin Korean Chem Soc

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Two kinds of free‐base tailed porphyrins modified with 2‐chloronicotinic acid and the corresponding Zn porphyrins have been synthesized. They have been characterized by elemental analysis and NMR, UV/Vis, fluorescence spectra, and infrared spectroscopies. Their configurations have been optimized through theoretical calculations. The fluorescence quantum yields were determined by a comparative method. The interactions between the Zn porphyrins and human serum albumin have been studied by means of fluorescence spectra. The experimental results showed that the interaction mechanism involved a combined fluorescence quenching process (static and dynamic quenching) and that the main driving force was hydrophobic in nature. Quenching constants, binding constants, thermodynamic parameters, and binding distances have been determined.

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“…By using the Cl --normalized ratios of rainwater, concentrations of other elements can be corrected with regard to the contribution of atmospheric deposition. According to Larssen et al (1999), the average level of Cl -is 0.01 meq/L in rural Guizhou, and about 0.021 meq/L in Guiyang City (Xiao et al 2013). We did not analyze rainwater during the period of study.…”

Section: Atmospheric Inputmentioning

confidence: 99%

Chemical weathering and CO2 consumption of a high-erosion-rate karstic river: a case study of the Sanchahe River, southwest China

Hou

et al. 2015

Chin. J. Geochem.

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The Sanchahe River in southwest China is a tributary of the Wujiang River and experiences high erosion rates. Geochemical analysis was conducted on Sanchahe River basin samples collected in the wet and dry seasons of 2014 in order to better understand local chemical weathering processes, anthropogenic influences, and associated CO 2 consumption. The samples' total dissolved solid concentrations were found to be significantly higher than that of the global river average. Ca 2? was the dominant cation in the samples and accounted for 64 % and 73 % of the total cations in the dry and wet seasons, respectively. HCO 3 -and SO 4 2-were the dominant anions, accounting for 92 % of the total anions. Stoichiometry analyses of the river waters suggested that the water chemistry is controlled by carbonate dissolution by both carbonic and sulfuric acid. The chemical weathering rates of carbonate and silicate evaporites in the Sanchahe River basin were estimated to be approximately 109.2 and 11.0 t/ (km 2 a), respectively, much higher than both the global mean values and the Wujiang River, a typical karstic river. The CO 2 consumption by carbonate and silicate weathering are estimated to be 597.4 9 10 3 and 325.5 9 10 3 mol/ (km 2 a), which are much higher than corresponding values in the Wujiang River, indicating a high erosion rate in the Sanchahe River basin.

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Chemical composition and source apportionment of rainwater at Guiyang, SW China

Cited by 73 publications

References 29 publications

δ15N–NH4+ variations of rainwater: Application of the Rayleigh model

δ15N–NH4+ variations of rainwater: Application of the Rayleigh model

Synthesis of Tailed Metalloporphyrins Modified with 2‐Chloronicotinic Acid and Interactions with Human Serum Albumin

Chemical weathering and CO2 consumption of a high-erosion-rate karstic river: a case study of the Sanchahe River, southwest China

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