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Gao Z.-Q.,Zhejiang Agriculture And forestry University | Zhang M.-J.,Zhejiang Agriculture And forestry University | Zhao K.-L.,Zhejiang Agriculture And forestry University | Fu W.-J.,Zhejiang Agriculture And forestry University | Gao W.,Jiuzhaigou National Park Administration
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2016

There was a total of 94 pairs of soil and rice samples were collected from Shengzhou, Zhejiang Province. The results indicated that the mean soil concentrations of five heavy metals including Cd, Cu, Ni, Pb and Zn were 0.20, 28.64, 27.03, 38.51 and 98.74 mg/kg, respectively. Compared with the National Guidelines, the heavy metals were enriched in paddy soils of the study area. Part of paddy farmland was seriously contaminated by heavy metals in Shengzhou city. However, the heavy metals in rice still remained at a safe level. The Cd, Cu, Ni, Pb, Zn concentrations in paddy soil had a moderate variability coefficients of 45.00%, 46.65%, 81.54%, 18.07%, 32.47%, respectively. Kriging interpolation and the Local Moran's I were used to identify the contaminated hotspots of these five metals. It was found out that the soil Cd, Cu, Ni, Zn had a very similar spatial pattern-higher concentrations located in the middle part of the study area while relatively lower levels in the eastern and western regions, which could be attributed to industrialization and other anthropogenic activities. The accumulation and bioavailability of heavy metals in the soil-rice system may be influenced by both soil heavy metal concentrations and soil physico-chemical properties. It may pose a potential threat to local ecosystem and human health as a long-term effect. © 2016, Chinese Society for Environmental Sciences. All right reserved. Source


Tang Y.,Sichuan University | Gao W.,Jiuzhaigou National Park Administration | Wang X.,Sichuan University | Ding S.,CAS Nanjing Institute of Geography and Limnology | And 4 more authors.
Environmental Monitoring and Assessment | Year: 2015

Wood preservatives can protect wood from dry rot, fungi, mould and insect damage, and chromated copper arsenate (CCA) has been used as an inorganic preservative for many years. However, wood treated with CCA has been restricted from residential uses in the EU from June 30, 2004, due to its potential toxicity. Such a regulation is not in place in China yet, and CCA-treated wood is widely used in public parks. A portable XRF analyser was used to investigate arsenic (As) concentration on surfaces of in-service CCA-treated wood planks in a popular park as well as the influencing field factors of age in-service, immersion and human footfall. With a total of 1207 readings, the observed As concentrations varied from below the detection limit (<10 mg/kg) to 15,746 mg/kg with a median of 1160 mg/kg. Strong variation of As concentrations were observed in different wood planks of the same age, on the surface of the same piece of wood, inside the same piece of wood, and different surfaces of walkway planks, hand rails and poles in the field. The oldest planks exhibited high As concentrations, which was related to its original treatment with high retention of CCA preservative. The effect of immersion in the field for about 4 months was insignificant for As concentration on the surfaces. However, a significant reduction of As was observed for immersion combined with human footfall (wiping by shoes). Human traffic in general caused slightly reduced and more evenly distributed As concentrations on the wood surfaces. The strong variation, slow aging and relatively weak immersion effects found in this study demonstrate that the in-service CCA-treated wood poses potential health risks to the park users, due to easy dermal contact especially when the wood is wet after rainfall. It is suggested that further comprehensive investigations and risk assessments of CCA-treated wood in residential areas in China are needed, and precautionary measures should be considered to reduce the potential risks to residents and visitors, especially children. © 2014, Springer International Publishing Switzerland. Source


Schweers W.,Chinese Academy of Agricultural Sciences | Bai Z.,ISRIC | Campbell E.,Carnegie Institution | Hennenberg K.,Institute of Applied Ecology | And 15 more authors.
Biomass and Bioenergy | Year: 2011

A standard methodology is needed to recognize potentially suitable areas for sustainable bioenergy crop production. This facilitates better identification of promising crops and cropping systems, logistical and economic studies, and work needed to meet regulatory criteria. A possible approach is built upon three layers of internationally available spatial data: (1) degrading and abandoned areas, (2) potentially suitable land cover classes, (3) exclusion zones such as nature reserves and areas of high biodiversity. For China, areas identified as potentially suitable range from 1.2 to 6.0% of the national territory, depending on different levels of statistical confidence in degrading area status and allowable limits of terrestrial carbon. Verification on the ground showed that about 60% of points tested conformed to the remote suitability assessment in the scenario, which represents the results for the combination of all degrading areas and a terrestrial carbon stock limit of 200 t ha-1. A top-down approach is useful in framing potentially suitable locations, but a complementary bottom-up analysis is still required to ultimately identify areas for sustainable bio-fuel production. © 2011 Elsevier Ltd. Source


Deng G.,Jiuzhaigou National Park Administration | Zhang X.,Jiuzhaigou National Park Administration | Ren P.,University of Sichuan
WIT Transactions on Information and Communication Technologies | Year: 2014

The construction of wisdom national park is put forward in the background of the transformation from digital earth to smart earth. It is a major strategic option of tourism development in China under the new situation and an inevitable course to realize sustainable development of China's national park. This paper primarily reviews the evolution of wisdom thinking. Then it discusses the significant content of the construction of wisdom national park on the foundation of elaborating its basic concept and major features. Wisdom national park is not smart national park. The construction of wisdom national park is a complicated and innovative systematic project. Its major content includes low-carbon tourism development, informatization construction, establishment of learning organizations, optimization of business process, strategic alliances, and crisis management. © 2014 WIT Press. Source

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