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Sustainable Development of Megacities: A Mega-Challenge for China and the World

Sustainable Development of Megacities: A Mega-Challenge for China and the World Tuesday, May 8, 2012 – ICM, International Congress Center, Munich, Room 4. 中国城市污染土地的可持续利用：问题与对策 Sustainable use of urban contaminated land in China: Problems and Countermeasures. Prof. Fasheng Li

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Sustainable Development of Megacities: A Mega-Challenge for China and the World

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  1. Sustainable Development of Megacities: A Mega-Challenge for China and the World Tuesday, May 8, 2012 – ICM, International Congress Center, Munich, Room 4 中国城市污染土地的可持续利用：问题与对策 Sustainable use of urban contaminated land in China: Problems and Countermeasures Prof. Fasheng Li Chinese Research Academy of Environmental Sciences

  2. Europe Russia Japan CHINA Land: important natural resource *Worldwide average forestry-cover rate reaches 31% Comparison with the adjacent countries like Russia, Japan, Korea and the worldwide level

  3. Since 1980, the annual average economic growth in China: >9% (GDP) In the meantime, waste generations and discharges have increased rapidly. Wastewater discharges Solid waste discharges Waste gases emission The serious situation that Chinese Government has to be faced with is: • Pressure of population • Lack of sufficient land resources • Further land deterioration and serious soil contamination

  4. 1984 2000 Rapid extension of cities -- Beijing

  5. Contaminated sites due to abandoned factories and relocation

  6. Landfill sites Non-sanitary landfills were very popular throughout the country before 1990s, which led to serious contamination of soil and goundwater by the leachates.

  7. Industrial residual sites

  8. UST ( Underground Storage Tank ) sites

  9. Emerging environmental problems Majority of world’s electronic wastes India

  10. Contaminated sites due to waste disposal Estimated share of contaminated sites in China (According to preliminary estimation ) Petroleum Petrochemicals Contaminated sites Manufacturing (factories) Chemicals spill others

  11. Up to now, no registers and inventories have been established in China Management of contaminated sites in Western Europe-Topic report, European Environment Agency ( 1999 ) • Number of potentially contaminated sites • Number of proven contaminated sites ? Germany:Contaminated sitesEstimated total-240,000Identified-202,880

  12. International experiences • Risk assessment and remediation of contaminated sites have become governments’ priority strategies in developed countries; • Superfund in United States • “Brownfield” Program in the United Kingdom • ……………..

  13. Soil contamination in urban area may lead to damage of human health through many pathways. Contaminant receptor Concept of Soil environmental risk Exposure pathway risk

  14. Cost-effective techiques is unavailable in China. • Commercialization and industrialization for remediation of contaminated sites is undeveloped in China.

  15. Challenges & Solutions

  16. Site survey and risk assessment of contaminated sites HCB β-HCH DDT

  17. Development of site remediation criteria using RBCA for Beijing, China (mg/kg) inorganics Pesticides & POPs VOCs SVOCs

  18. Practices in Remediation of contaminated sites in China Bioremediation of petrochemicals contaminated sites 1 2 3 4 5

  19. International workshops on risk assessment and remediation of urban contaminated sites in recent years in China

  20. Closing Remarks • Rapid economic growth has caused serious problem of urban contaminated sites in China. • It is sure that the increasing economic power will give excellent solutions to this problem. German Technical Cooperation，GTZ Training course on remediation and risk management of urban contaminated sites in China

  21. Thank you for your attention! lifs@craes.org.cn 自然和谐 厚积薄发

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