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Hydro-Geochemistry of the River Water in the Jiulongjiang River Basin, Southeast China: Implications of Anthropogenic Inputs and Chemical Weathering

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  • Xiaoqiang Li

    (Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Guilin Han

    (Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Man Liu

    (Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Kunhua Yang

    (Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

  • Jinke Liu

    (Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China)

Abstract

This study focuses on the chemical weathering process under the influence of human activities in the Jiulongjiang River basin, which is the most developed and heavily polluted area in southeast China. The average total dissolved solid (TDS) of the river water is 116.6 mg/L and total cation concentration ( TZ + ) is 1.5 meq/L. Calcium and HCO 3 − followed by Na + and SO 4 2 − constitute the main species in river waters. A mass balance based on cations calculation indicated that the silicate weathering (43.3%), carbonate weathering (30.7%), atmospheric (15.6%) and anthropogenic inputs (10.4%) are four reservoirs contributing to the dissolved load. Silicates (SCW) and carbonates (CCW) chemical weathering rates are calculated to be approximately 53.2 ton/km 2 /a and 15.0 ton/km 2 /a, respectively. When sulfuric and nitric acid from rainfall affected by human activities are involved in the weathering process, the actual atmospheric CO 2 consumption rates are estimated at 3.7 × 10 5 mol/km 2 /a for silicate weathering and 2.2 × 10 5 mol/km 2 /a for carbonate weathering. An overestimated carbon sink (17.4 Gg C / a ) is about 27.0% of the CO 2 consumption flux via silicate weathering in the Jiulongjiang River basin, this result shows the strong effects of anthropogenic factors on atmospheric CO 2 level and current and future climate change of earth.

Suggested Citation

  • Xiaoqiang Li & Guilin Han & Man Liu & Kunhua Yang & Jinke Liu, 2019. "Hydro-Geochemistry of the River Water in the Jiulongjiang River Basin, Southeast China: Implications of Anthropogenic Inputs and Chemical Weathering," IJERPH, MDPI, vol. 16(3), pages 1-16, February.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:3:p:440-:d:203175
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    References listed on IDEAS

    as
    1. Zhonghe Zhao & Gaohuan Liu & Qingsheng Liu & Chong Huang & He Li, 2018. "Studies on the Spatiotemporal Variability of River Water Quality and Its Relationships with Soil and Precipitation: A Case Study of the Mun River Basin in Thailand," IJERPH, MDPI, vol. 15(11), pages 1-19, November.
    2. Bin Liang & Guilin Han & Man Liu & Kunhua Yang & Xiaoqiang Li & Jinke Liu, 2018. "Distribution, Sources, and Water Quality Assessment of Dissolved Heavy Metals in the Jiulongjiang River Water, Southeast China," IJERPH, MDPI, vol. 15(12), pages 1-14, December.
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    Cited by:

    1. Qian Zhang & Guilin Han & Man Liu & Xiaoqiang Li & Lingqing Wang & Bin Liang, 2019. "Distribution and Contamination Assessment of Soil Heavy Metals in the Jiulongjiang River Catchment, Southeast China," IJERPH, MDPI, vol. 16(23), pages 1-13, November.
    2. Rui Qu & Guilin Han & Man Liu & Kunhua Yang & Xiaoqiang Li & Jinke Liu, 2020. "Fe, Rather Than Soil Organic Matter, as a Controlling Factor of Hg Distribution in Subsurface Forest Soil in an Iron Mining Area," IJERPH, MDPI, vol. 17(1), pages 1-13, January.
    3. Xiaoqiang Li & Guilin Han & Man Liu & Chao Song & Qian Zhang & Kunhua Yang & Jinke Liu, 2019. "Hydrochemistry and Dissolved Inorganic Carbon (DIC) Cycling in a Tropical Agricultural River, Mun River Basin, Northeast Thailand," IJERPH, MDPI, vol. 16(18), pages 1-13, September.

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