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

TY - JOUR

T1 - Evidence of economic development revealed in centennial scale sedimentary records of organic pollutants in Huguangyan Marr Lake

AU - Wang, Xinkai

AU - Xia, Yubao

AU - Zhang, Yanxia

AU - Ji, Qingsong

AU - Yan, Guojing

AU - Huang, Biao

AU - He, Maoyong

AU - Yang, Yi

AU - Zhong, Ming

AU - He, Huan

AU - Yang, Pengfei

AU - Liu, Xiaofei

AU - Wu, Qiumei

AU - Sabel, Clive E

AU - Lei, Pei

AU - Jin, Zhangdong

PY - 2024/6

Y1 - 2024/6

N2 - 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.

AB - 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.

KW - Historical pollution

KW - Impact factors

KW - Maar Lake

KW - Phthalates

KW - Polycyclic aromatic hydrocarbons

KW - Water Pollutants, Chemical/analysis

KW - Environmental Monitoring

KW - Polycyclic Aromatic Hydrocarbons/analysis

KW - Phthalic Acids/analysis

KW - China

KW - Economic Development

KW - Lakes/chemistry

KW - Geologic Sediments/chemistry

UR - http://www.scopus.com/inward/record.url?scp=85189529149&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2024.172044

DO - 10.1016/j.scitotenv.2024.172044

M3 - Journal article

C2 - 38554953

SN - 0048-9697

VL - 927

JO - Science of the Total Environment

JF - Science of the Total Environment

M1 - 172044

ER -