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土壤修復技術

2016-03-01 13:57


  • 一、土壤修復概念
  •   土壤修復是使遭受污染的土壤恢復正常功能的技術措施。在土壤修復行業,已有的土壤修復技術達到一百多種,常用技術也有十多種,大致可分為物理、化學和生物三種方法。20世紀80年代以來,世界上許多國家特別是發達國家均制定并開展了污染土壤治理與修復計劃,因此也形成了一個新興的土壤修復行業。
  •    “高污染超標率”“萬億級規模市場”“復雜的系統工程”“發展初期的新興行業,中國土壤污染防治正貼著這些標簽步入聯合國首個國際土壤年
  •   根據2014年發布的《全國土壤污染狀況調查公報》,中國土壤環境狀況總體不容樂觀,全國土壤污染超標率達16.1%,在工礦業廢棄地土壤環境問題突出的同時,耕地土壤環境質量更加堪憂。面對土壤污染的嚴峻局面,國家立法速度明顯加快。環保部除了在新《環境保護法》中增加了土壤修復的內容外,日前又公布了新的《土壤環境質量標準(征求意見稿)》,《土壤污染防治行動計劃》(簡稱土十條)的制定實施也被提上日程。土壤大范圍污染超標加上國家立法的推動,業內預計將催生萬億級土壤修復市場。然而多位專家卻表示,蛋糕雖大但不能盲目樂觀,受制于技術、資金、商業模式等多重壁壘,土壤修復產業想在短時間內做大并不現實。
  • 二、污染場地資料收集與調查評估

    1目標

  • 掌握場地利用方式與功能屬性;
  • 掌握場地自然屬性與污染特征(污染歷史、污染物種類和含量);
  • 評估場地風險水平(人體健康風險、生態風險);
  • 確定修復目標(基于風險評價);
  • 2相關標準、導則、規范
  • 《場地環境調查技術規范》
  • 《場地環境監測技術導則》
  • 《污染場地風險評估技術導則》
  • 《污染場地土壤修復技術導則》
  • 《土壤環境質量標準》
  • 《土壤環境監測技術規范》
  • 三、修復技術選擇與方案確定

    1技術有效性

    2制度可采做行

    3修復工程周期

    4資金投入

    5公眾可接受程度(因地制宜)

    四、修復工程實施與管理

    1、工程實施

    1程序合法合規

    2程序人員安全

    3保護周邊生態

    4全程詳細記錄

    2過程管理

    1設置監測系統

    2恢復修復前條件

    3定期檢查評估

    五、修復效果評價

    1污染治理效果

  • 降解、固定或處理有毒物質的量
  • 對污染物毒性、活性的減少程度
  • 處理過程的不可逆水平
  • 處理后遺留物的類型和數量
  • 2社會與經濟效益

  • 實現對公眾健康的保護
  • 場地功能及價值的提高
  • 環境效益的提高
  • 六、主流修復工藝:

    1重金屬污染場地  

    2持久性有機污染場地

    3揮發性有機污染場地

    4烴類污染場地

    5重金屬污染耕地

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