Residues and source identification of persistent organic pollutants in farmland soils irrigated by effluents from biological treatment plants

Chen, Ying; Wang, Chunxia; Wang, Zijian

doi:10.1016/j.envint.2005.05.024

Cited by 212 publications

(102 citation statements)

References 23 publications

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“…Wastewater irrigation, solid waste disposal, sludge applications, vehicular exhaust and industrial activities are the major sources of soil contamination with heavy metals, and an increased metal uptake by food crops grown on such contaminated soils is often observed. In general, wastewater contains substantial amounts of beneficial nutrients and toxic heavy metals, which are creating opportunities and problems for agricultural production, respectively (Chen et al, 2005;Singh et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

Khan

Cao

Zheng

et al. 2008

Environmental Pollution

2,035

912

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Long-term wastewater irrigation leads to buildup of heavy metals in soils and food crops. AbstractConsumption of food crops contaminated with heavy metals is a major food chain route for human exposure. We studied the health risks of heavy metals in contaminated food crops irrigated with wastewater. Results indicate that there is a substantial buildup of heavy metals in wastewater-irrigated soils, collected from Beijing, China. Heavy metal concentrations in plants grown in wastewater-irrigated soils were significantly higher (P 0.001) than in plants grown in the reference soil, and exceeded the permissible limits set by the State Environmental Protection Administration (SEPA) in China and the World Health Organization (WHO). Furthermore, this study highlights that both adults and children consuming food crops grown in wastewater-irrigated soils ingest significant amount of the metals studied. However, health risk index values of less than 1 indicate a relative absence of health risks associated with the ingestion of contaminated vegetables.

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Section: Introductionmentioning

confidence: 99%

Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

Khan

Cao

Zheng

et al. 2008

Environmental Pollution

2,035

912

View full text Add to dashboard Cite

show abstract

“…In metropolitan regions of northern China, the domestic wastewater and industrial effluents are biologically treated and subsequently used for irrigation. However, the wastewater contains substantial amount of nutrients, and organic and inorganic pollutants, which are creating both opportunities and problems for the farming sector [3,4]. deposition on leaves and sorption from direct contact with soil particles, are responsible for the transfer of organic pollutants from soil to plant tissues.…”

Section: Introductionmentioning

confidence: 99%

Accumulation of polycyclic aromatic hydrocarbons and heavy metals in lettuce grown in the soils contaminated with long-term wastewater irrigation

Khan

Lin

Zhang

et al. 2008

Journal of Hazardous Materials

252

119

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Accumulation of polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs) by crop plants from contaminated soils may pose health risks. A greenhouse pot experiment using lettuce (Lactuca satuva L.) as a representative vegetable was conducted to assess the concentrations of PAHs and HMs in vegetables grown in wastewater-contaminated soils. The concentrations of total PAHs were ranged from 1.5 to 3.4 mg kg −1 in the contaminated soils, while 1.2 mg kg −1 in the reference soil. Linear regression analyses showed that the relationships between soil and shoot PAH concentrations were stronger for LMW-PAHs (R 2 between 0.51 and 0.92) than for HMW-PAHs (R 2 0.02 and 0.60), suggesting that translocation for LMW-PAHs is faster than HMW-PAHs. Furthermore, the data imply that root uptake was the main pathway for HMW-PAHs accumulation. The plant shoots were also highly contaminated with HMs, particularly Cd (0.4-0.9 mg kg −1 ), Cr (3.4-4.1 mg kg −1 ), Ni (11.7-15.1 mg kg −1 ) and Pb (2.3-5.3 mg kg −1 ), and exceed the guidance limits set by State Environmental Protection Administration (SEPA), China and the World Health Organization (WHO). This study highlights the potential health risks associated with cultivation and consumption of leafy vegetables on wastewater-contaminated soils.

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“…Both influent and effluent water samples (250 mL) from HBPW and XJPW were taken for PAH analysis according to the protocol of the US Environmental Protection Agency (US EPA) and were processed immediately (Chen et al, 2005). The concentrations of PAHs in the extracts were determined by an Agilent 6890GC equipped with a 5973 mass selective detector using an HP-5 fused silica capillary column (60 m × 0.25 mm × 0.25 μm film thickness) under the selected ion monitoring mode.…”

Section: Quantification Of Pahs and Water Quality Analysismentioning

confidence: 99%

Impacts of produced water origin on bacterial community structures of activated sludge

Wang

Pan

Hesham

et al. 2015

Journal of Environmental Sciences

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The purpose of this study was to reveal how activated sludge communities respond to influent quality and indigenous communities by treating two produced waters from different origins in a batch reactor in succession. The community shift and compositions were investigated using Polymerase Chain Reaction-denaturing gradient gel electrophoresis (PCR-DGGE) and further 16S ribosomal DNA (rDNA) clone library analysis. The abundance of targeted genes for polycyclic aromatic hydrocarbon (PAH) degradation, nahAc/phnAc and C12O/C23O, was tracked to define the metabolic ability of the in situ microbial community by Most Probable Number (MPN) PCR. The biosystem performed almost the same for treatment of both produced waters in terms of removals of chemical oxygen demand (COD) and PAHs. Sludge communities were closely associated with the respective influent bacterial communities (similarity > 60%), while one sludge clone library was dominated by the Betaproteobacteria (38%) and Bacteriodetes (30%) and the other was dominated by Gammaproteobacteria (52%). This suggested that different influent and water quality have an effect on sludge community compositions. In addition, the existence of catabolic genes in sludge was consistent with the potential for degradation of PAHs in the treatment of both produced waters.

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Residues and source identification of persistent organic pollutants in farmland soils irrigated by effluents from biological treatment plants

Cited by 212 publications

References 23 publications

Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

Accumulation of polycyclic aromatic hydrocarbons and heavy metals in lettuce grown in the soils contaminated with long-term wastewater irrigation

Impacts of produced water origin on bacterial community structures of activated sludge

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