Nitrate pollution of groundwater in the Yellow River delta, China

Chen, Jianyao; Taniguchi, Makoto; Liu, Guanqun; Miyaoka, Kunihide; Onodera, Satoshi; Tokunaga, Tomochika; Fukushima, Yoshihiro

doi:10.1007/s10040-007-0196-7

Cited by 92 publications

(48 citation statements)

References 10 publications

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“…Over the course of human history, the river valley has had great influence on civilization and the origin of Chinese culture, such that the Yellow River is referred to as the Mother River of China. The Yellow River Delta (YRD), which is a typical ecotone of the Yellow River and Bohai Bay (Chen et al, 2007), is experiencing enormous environmental deterioration from industrialization. Extremely high sediment loads (N 1000 million tons per year, M t/year) have been discharged to the sea over thousands of years as a result of poor agricultural practices in the loess region.…”

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confidence: 99%

“…Most investigations of pollutants in the YRD have focused on hydrocarbon, nitrate, PCB, and trace metal pollutants Chen et al, 2007;Wang et al, 2009b); few reports of OCP concentrations in the YRD are available. Although the application of OCPs has been forbidden for a considerable period in China, OCPs pollution of multiple environments was universal Zhou et al, 2006).…”

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confidence: 99%

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Sources, concentrations and risk factors of organochlorine pesticides in soil, water and sediment in the Yellow River estuary

Liu

2015

Marine Pollution Bulletin

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The environmental occurrence, sources and risk factors of organochlorine pesticides (HCHs and DDTs) and their isomers or metabolites were studied using comprehensive surveys (including soil, surface water, groundwater and sediment sampling) conducted in the Yellow River Delta (YRD). HCHs and DDTs were all detected in multi environmental media. Compared with reported organochlorine pesticide values in China and abroad and with related environmental quality standards, the concentrations of HCHs and DDTs were generally at low levels in the YRD. Composition of OCPs (DDT metabolites and HCH isomers) showed that DDTs in the multiple environments of the YRD not only came from residues of dicofol but also from atmospheric deposition, while HCH pollution results from the historical usage of a mixture of technical HCH and lindane. Furthermore, the sum of Excess Lifetime Cancer Risk (∑ELCR) exposure to HCHs exceeded the generally acceptable risk level of 1.0E-06 recommended by the USEPA for carcinogenic chemicals.

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Sources, concentrations and risk factors of organochlorine pesticides in soil, water and sediment in the Yellow River estuary

Liu

2015

Marine Pollution Bulletin

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“…6, 7). Moreover, Chen et al (2007) found there is a characteristic of upward gradient in the confined aquifer by comparing the water tables between the deep confined well (35 m depth) and shallow well (10 m) in the YRD coast. We propose the hypothesis that the shallow saltwater at the coast stripe in the YRD was recharged by the upward flow from confined brines other than the intrusion of seawater.…”

Section: Stable Isotopic Compositionmentioning

confidence: 99%

“…The other evidence ruling out the involvement of modern seawater is that the mean Cl/Br ratios of the saltwater (Cl/Br = *760) are higher than the seawater ratio (Cl/Br = *639). Chen et al (2007) and Wang (2009) defined the confined brine ([30 m depth) derived from paleo seawater dated between 4000 and 7400 years BP using the 14 C dating different water origin. The fact that d…”

Section: Stable Isotopic Compositionmentioning

confidence: 99%

Geochemical and isotopic evidence of shallow groundwater salinization in a reclaimed coastal zone: the Yellow River Delta, China

Liu

et al. 2016

Environ Earth Sci

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This paper aims to improve the current knowledge of groundwater salinization processes of a young coastal aquifer in the Yellow River Delta (YRD) and to assess the impact of both the transfer of irrigation water from the Yellow River and seawater intrusion, using a combination of hydrochemical-isotopic measurements. The major ion/Cl -ratios generally closely follow the mixing line between freshwater end-member (the Yellow River) and saline water end-members (salt groundwater or seawater), indicating the importance of mixing under natural and anthropogenic influences. The examination of stable isotope in groundwater (ranging from -9.0 to -3.5 % for d18 O and from -73 to -29 % for dD, respectively) and chloride concentrations (*2 to 629 meq/ L) confirms that the saline end-member is associated with saltwater rather than present seawater, and most groundwater samples are plotted on mixing lines between the Yellow River and saltwater. The similar range in stable isotopes (d 18 O and dD) and Cl -compositions between saltwater and confined aquifer supports the hypothesis that upward seepage of confined saline water intruded the shallow aquifer. Moreover, the deviations in some cases from mixing line imply water-rock interaction is also important in dominant control on groundwater chemistry, such as cation exchange, SO 4 2-reduction, and NaCl solution. The brackish water was characterized by slight excess of Na ? and deficit of Ca 2? compared to nonreactive mixing line. This indicates that the coastal aquifer is generally freshening with respect to extensive irrigation network, as well as the transfer from the Yellow River for ecological recharge into wetland.

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“…The mYRD starts at Ninghai, Shandong Province, and stretches from the Tao'er River in the north to the Zimai River in the south, 97 % of which is located in Dongying City (Zhang et al 2011a). Half of the water derived from the Yellow River is used for irrigation in the mYRD (Chen et al 2007). …”

Section: Methodsmentioning

confidence: 99%

Characteristics of residual organochlorine pesticides in soils under different land-use types on a coastal plain of the Yellow River Delta

Zhang

et al. 2015

Environ Geochem Health

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Nitrate pollution of groundwater in the Yellow River delta, China

Cited by 92 publications

References 10 publications

Sources, concentrations and risk factors of organochlorine pesticides in soil, water and sediment in the Yellow River estuary

Sources, concentrations and risk factors of organochlorine pesticides in soil, water and sediment in the Yellow River estuary

Geochemical and isotopic evidence of shallow groundwater salinization in a reclaimed coastal zone: the Yellow River Delta, China

Characteristics of residual organochlorine pesticides in soils under different land-use types on a coastal plain of the Yellow River Delta

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