Assessing the effects of urbanization on the environment with soil legacy and current-use insecticides: A case study in the Pearl River Delta, China

Wei, Yanli; Bao, Lian-Jun; Wu, Chen-Chou; He, Zai-Cheng; Zeng, Eddy Y.

doi:10.1016/j.scitotenv.2015.01.111

Cited by 53 publications

(23 citation statements)

References 34 publications

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“…For example, the concentrations of LABs were higher in industry, agriculture and residency than in other land-use types (Wei et al, 2014a), whereas those of PAHs were not significantly different among the six land-use types (Wei et al, 2014b). In addition, legacy insecticides, i.e., organochlorine pesticides (OCPs) were mainly distributed in landfill, industry and residency while current-used insecticides, such as organophosphate and pyrethroid were concentrated in landfill, agriculture and residency (Wei et al, 2015). The disparity among different types of contaminants may be attributed to different sources and redistribution processes of these contaminants.…”

Section: Spatial Distribution Patterns Of Hfrsmentioning

confidence: 97%

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Characterization of anthropogenic impacts in a large urban center by examining the spatial distribution of halogenated flame retardants

Wei

Bao

et al. 2016

Environmental Pollution

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a b s t r a c tAnthropogenic impacts have continuously intensified in mega urban centers with increasing urbanization and growing population. The spatial distribution pattern of such impacts can be assessed with soil halogenated flame retardants (HFRs) as HFRs are mostly derived from the production and use of various consumer products. In the present study, soil samples were collected from the Pearl River Delta (PRD), a large urbanized region in southern China, and its surrounding areas and analyzed for a group of HFRs, i.e., polybrominated diphenyl ethers (PBDEs), decabromodiphenyl ethane, bis(hexachlorocyclopentadieno) cyclooctane (DP) and hexabromobenzene. The sum concentrations of HFRs and PBDEs were in the ranges of 0.66e6500 and 0.37e5700 (mean: 290 and 250) ng g À1 dry weight, respectively, around the middle level of the global range. BDE-209 was the predominant compound likely due to the huge amounts of usage and its persistence. The concentrations of HFRs were greater in the land-use types of residency, industry and landfill than in agriculture, forestry and drinking water source, and were also greater in the central PRD than in its surrounding areas. The concentrations of HFRs were moderately significantly (r 2 ¼ 0.32e0.57; p < 0.05) correlated with urbanization levels, population densities and gross domestic productions in fifteen administrative districts. The spatial distribution of DP isomers appeared to be stereoselective as indicated by the similarity in the spatial patterns for the ratio of anti-DP versus the sum of DP isomers (f anti-DP ) and DP concentrations. Finally, the concentrations of HFRs sharply decreased with increasing distance from an e-waste recycling site, indicating that e-waste derived HFRs largely remained in local soil.

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Section: Spatial Distribution Patterns Of Hfrsmentioning

confidence: 97%

“…LABs were largely from sewage discharge (Wei et al, 2014a) and PAHs were from combustion of coal and refined petroleum (Wei et al, 2014b). Insecticides were applied to agricultural areas for protecting crops against insects and urbanized areas for mosquito control (Wei et al, 2015).…”

Section: Spatial Distribution Patterns Of Hfrsmentioning

confidence: 99%

Characterization of anthropogenic impacts in a large urban center by examining the spatial distribution of halogenated flame retardants

Wei

Bao

et al. 2016

Environmental Pollution

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“…Land erosion resulting from urbanization and a relatively higher use of DDT in the Pearl River catchment could contribute to the relatively high level of DDT pollution. Wei et al (2015) found that higher concentrations of DDTs mainly occurred in soils from the central PRD where there is a higher level of urbanization and inhabited land that has experienced frequent landuse changes. An increasing trend was observed for the levels of DDTs from upstream to downstream of the Xijiang, Pearl, and Dongjiang Rivers.…”

Section: Ddts and Hchsmentioning

confidence: 99%

Persistent halogenated compounds in fish from rivers in the Pearl River Delta, South China: Geographical pattern and implications for anthropogenic effects on the environment

Sun

Luo

Tang

et al. 2016

Environmental Research

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“…According to a previous research result, 1 t of nitrogen fertilizer costs 11.85 t of CO 2eq (West and Marland, 2002), and 1 t of pesticide costs 13.8 t of CO 2eq (Zhang, 2010), and we can calculate that there is a 526.9 kg/a CO 2 eq cost in a traditional pattern. However, this number for the CIES pattern is 261.3 kg/a CO 2 eq.…”

Section: Environmental Benefitsmentioning

confidence: 91%

“…Those problems, such as lack of fresh water and poor air quality, are mainly caused by urban areas that usually have a high population density (Xie et al, 2013;Wei et al, 2015;Zhou et al, 2016). However, compared to urban areas, we should not be too optimistic about the environment in rural areas.…”

Section: Introductionmentioning

confidence: 99%

Courtyard integrated ecological system: An ecological engineering practice in China and its economic-environmental benefit

Han

Ouyang

Liu

et al. 2016

Journal of Cleaner Production

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a b s t r a c tRural residential areas and low resident density areas are usually distressed by the lack of municipal infrastructure, which causes a poor supply of water and energy, as well as a shortage of the waste and pollution disposal equipment The courtyard integrated ecological system (CIES) is an example of an ecological engineering solution to this problem. CIES originated in the Hainan rural area of China. This family level symbiotic system was designed by the authors according to a few sustainable principles, such as making good use of local natural resources, low cost, convenience of operation, and resource recycling. CIES systematically integrated a series of single techniques, such as vertical planting, hydroponic farming, artificial wetland, rainwater harvesting and automatic management, and so on. After a brief introduction of the CIES design, this article also studied its economic-environmental benefit with one year of monitoring data and a comparison between the CIES pattern and traditional pattern with both emergy analysis and carbon footprint analysis methods. The results showed that CIES could provide an increase of 75 m 2 of green land, 40 m 3 of green volume and 2400 kg of vegetables for each rural family. In addition, each family could save 277 kWh of electric power, 70.87 t of fresh water, 7.5 kg of chemical fertilizer and 450 g of pesticides each year. Additionally, counting the money saved, each CIES can produce more than 38,000 RMB after 1.28 years of payback. Compared to the traditional living pattern in a local area, the CIES pattern costs only 19.4% of the former's emergy and 49.6% of the carbon footprint of the traditional living pattern. Assuming that CIES is applied to half of the rural households in Hainan Province, each farmer would receive an extra 2842 RMB for each year, the emergy consumed by the system would be reduced by 1.6 Â 10 21 sej, and CO 2 emissions would be reduced by 1.036 Â 10 5 t.

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Assessing the effects of urbanization on the environment with soil legacy and current-use insecticides: A case study in the Pearl River Delta, China

Cited by 53 publications

References 34 publications

Characterization of anthropogenic impacts in a large urban center by examining the spatial distribution of halogenated flame retardants

Characterization of anthropogenic impacts in a large urban center by examining the spatial distribution of halogenated flame retardants

Persistent halogenated compounds in fish from rivers in the Pearl River Delta, South China: Geographical pattern and implications for anthropogenic effects on the environment

Courtyard integrated ecological system: An ecological engineering practice in China and its economic-environmental benefit

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