Article, 2024

Evidence of economic development revealed in centennial scale sedimentary records of organic pollutants in Huguangyan Marr Lake

The Science of The Total Environment, ISSN 1879-1026, 0048-9697, Volume 927, Page 172044, 10.1016/j.scitotenv.2024.172044

Contributors

Wang, Xinkai 0009-0005-1514-2073 [1] Xia, Yubao [2] Zhang, Yanxia 0000-0001-8315-5371 (Corresponding author) [2] [3] Ji, Qingsong [2] Yan, Guojing [1] Huang, Biao [1] He, Mao-Yong 0000-0002-9545-5037 [4] Yang, Yi [5] Zhong, Ming [1] He, Huan 0000-0003-3460-2491 [2] Yang, Pengfei [6] Liu, Xiaofei [6] Wu, Qiumei [1] Sabel, Clive Eric 0000-0001-9180-4861 [3] [7] Lei, Pei [2] Jin, Zhang-Dong 0000-0002-1457-0552 (Corresponding author) [4]

Affiliations

  1. [1] Institute of Soil Science
    2. [NORA names: China; Asia, East];
  2. [2] Nanjing Normal University
    3. [NORA names: China; Asia, East];
  3. [3] Aarhus University
    4. [NORA names: AU Aarhus University; University; Denmark; Europe, EU; Nordic; OECD];
  4. [4] Institute of Earth Environment
    5. [NORA names: China; Asia, East];
  5. [5] East China Normal University
    6. [NORA names: China; Asia, East];

Abstract

Sedimentary records of polycyclic aromatic hydrocarbons (PAHs) and phthalates could reflect energy consumption and industrial production adjustment. However, there is limited knowledge about their effects on variations of PAH and phthalate compositions in the sediment core. The PAH and phthalate sedimentary records in Huguangyan Maar Lake in Guangdong, China were constructed, and random forest models were adopted to quantify the associated impact factors. Sums of sixteen PAH (∑16 PAH) and seven phthalate (∑7 PAE) concentrations in the sediment ranged from 28.8 to 1110 and 246-4290 μg/kg dry weight in 1900-2020. Proportions of 5-6 ring PAHs to the ∑16 PAHs increased from 32.0 %-40.7 % in 1900-2020 with increased coal and petroleum consumption, especially after 1980. However, those of 2-3 ring PAHs decreased from 30.7 % to 23.6 % due to the biomass substitution with natural gas. The proportions of bis (2-ethylhexyl) phthalate to the ∑7 PAEs decreased from 52.3 %-29.1 % in 1900-2020, while those of di-isobutyl phthalate increased (13.7 % to 42.3 %). The shift from traditional plasticizers to non-phthalates drove this transformation, though the primary plastic production is increasing. Our findings underscore the effectiveness of optimizing energy structures and updating chemical products in reducing organic pollution in aquatic environments.

Keywords

China, Guangdong, Huguangyan Maar Lake, Maar Lake, PAE, adjustment, aquatic environment, aromatic hydrocarbons, biomass, biomass substitution, bis (2-ethylhexyl) phthalate, chemical, chemical products, coal, composition, concentration, consumption, core, development, di-isobutyl, di-isobutyl phthalate, dry weight, economic development, effect, energy, energy consumption, energy structure, environment, evidence, factors, findings, forest model, gas, hydrocarbons, impact, impact factor, increased coal, knowledge, lake, model, natural gas, non-phthalates, organic pollutants, petroleum, petroleum consumption, phthalate, plastic products, plasticity, pollution, polycyclic aromatic hydrocarbons, production, production adjustment, proportion, random forest model, records, records of polycyclic aromatic hydrocarbons, reducing organic pollutants, sediment cores, sedimentary record, sedimentary records of polycyclic aromatic hydrocarbons, sediments, shift, structure, substitution, sum, traditional plastics, transformation, variation, variations of polycyclic aromatic hydrocarbons, weight

Funders

  • National Natural Science Foundation of China
  • Chinese Academy of Sciences
  • Government of Jiangsu Province
  • European Commission

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