Characterization of rainwater chemical composition after a Southeast Asia haze event

insight of transboundary pollutant transport during the northeast monsoon

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3 Citations (Scopus)

Abstract

Open biomass burning in Peninsula Malaysia, Sumatra, and parts of the Indochinese region is a major source of transboundary haze pollution in the Southeast Asia. To study the influence of haze on rainwater chemistry, a short-term investigation was carried out during the occurrence of a severe haze episode from March to April 2014. Rainwater samples were collected after a prolonged drought and analyzed for heavy metals and major ion concentrations using inductively coupled plasma mass spectroscopy (ICP-MS) and ion chromatography (IC), respectively. The chemical composition and morphology of the solid particulates suspended in rainwater were examined using a scanning electron microscope coupled with energy-dispersive X-ray spectroscopy (SEM-EDS). The dataset was further interpreted using enrichment factors (EF), statistical analysis, and a back trajectory (BT) model to find the possible sources of the particulates and pollutants. The results show a drop in rainwater pH from near neutral (pH 6.54) to acidic (<pH 4.00) during the haze to non-haze transitional period, suggesting that the deposition rate of sulfate and nitrate in the atmosphere via the precipitation process was relatively lower compared to the mineral components. Zinc, nitrate, and calcium, which were the predominant elements in the first rainwater samples. Besides, the results of the SEM-EDS indicated that the zinc was possibly originated from anthropogenic activities which are consistent with the results obtained from EF. The BT model showed that pollutants transported from the mainland of Indo-China and the marine region in the South China Sea were responsible for the high pollution event in the study area. These findings can be useful in identifying contributions of pollutants from single or multiple sources in rainwater samples during haze episodes.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalEnvironmental Science and Pollution Research
DOIs
Publication statusAccepted/In press - 13 May 2017

Fingerprint

Southeastern Asia
haze
pollutant transport
rainwater
Energy dispersive spectroscopy
Nitrates
Pollution
monsoon
Zinc
chemical composition
Trajectories
Ion chromatography
Scanning electron microscopy
Drought
China
Inductively coupled plasma
Heavy Metals
Deposition rates
Chemical analysis
Ions

Keywords

  • Air pollution
  • Biomass burning
  • Drought
  • Malaysia
  • Rainwater
  • Trace elements

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

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title = "Characterization of rainwater chemical composition after a Southeast Asia haze event: insight of transboundary pollutant transport during the northeast monsoon",
abstract = "Open biomass burning in Peninsula Malaysia, Sumatra, and parts of the Indochinese region is a major source of transboundary haze pollution in the Southeast Asia. To study the influence of haze on rainwater chemistry, a short-term investigation was carried out during the occurrence of a severe haze episode from March to April 2014. Rainwater samples were collected after a prolonged drought and analyzed for heavy metals and major ion concentrations using inductively coupled plasma mass spectroscopy (ICP-MS) and ion chromatography (IC), respectively. The chemical composition and morphology of the solid particulates suspended in rainwater were examined using a scanning electron microscope coupled with energy-dispersive X-ray spectroscopy (SEM-EDS). The dataset was further interpreted using enrichment factors (EF), statistical analysis, and a back trajectory (BT) model to find the possible sources of the particulates and pollutants. The results show a drop in rainwater pH from near neutral (pH 6.54) to acidic (",
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author = "{Mohd Nadzir}, {Mohd Shahrul} and Lin, {Chin Yik} and Firoz Khan and Latif, {Mohd Talib} and Doreena Dominick and Hamid, {Haris Hafizal Abdul} and Noorlin Mohamad and {Abdul Maulud}, {Khairul Nizam} and {A Wahab}, {Muhammad Ikram} and {Nurul Farahana}, Kamaludin and {Mat Lazim}, {Mohamad Azwani Shah}",
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T2 - insight of transboundary pollutant transport during the northeast monsoon

AU - Mohd Nadzir, Mohd Shahrul

AU - Lin, Chin Yik

AU - Khan, Firoz

AU - Latif, Mohd Talib

AU - Dominick, Doreena

AU - Hamid, Haris Hafizal Abdul

AU - Mohamad, Noorlin

AU - Abdul Maulud, Khairul Nizam

AU - A Wahab, Muhammad Ikram

AU - Nurul Farahana, Kamaludin

AU - Mat Lazim, Mohamad Azwani Shah

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N2 - Open biomass burning in Peninsula Malaysia, Sumatra, and parts of the Indochinese region is a major source of transboundary haze pollution in the Southeast Asia. To study the influence of haze on rainwater chemistry, a short-term investigation was carried out during the occurrence of a severe haze episode from March to April 2014. Rainwater samples were collected after a prolonged drought and analyzed for heavy metals and major ion concentrations using inductively coupled plasma mass spectroscopy (ICP-MS) and ion chromatography (IC), respectively. The chemical composition and morphology of the solid particulates suspended in rainwater were examined using a scanning electron microscope coupled with energy-dispersive X-ray spectroscopy (SEM-EDS). The dataset was further interpreted using enrichment factors (EF), statistical analysis, and a back trajectory (BT) model to find the possible sources of the particulates and pollutants. The results show a drop in rainwater pH from near neutral (pH 6.54) to acidic (

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