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重金屬污染土壤治理線上研討會有哪些重點案例?你想看的都在這!
2022-06-20
16:23:46
來源:環(huán)保在線 閱讀量:13907
評論
【農(nóng)機網(wǎng) 會展快訊】2022年,國家啟動了第三次全國土壤普查,從2022年開始持續(xù)到2025年,對全國耕地、園地、林地、草地等農(nóng)用地和部分未利用地的土壤進行一次“全面體檢”。眼下,土壤污染問題越來越受到重視。
在此背景下,2022年6月16日上午,由ACI環(huán)保、賽默飛世爾科技、環(huán)保在線主辦的重金屬污染土壤治理線上研討會準時上線,研討會邀請了行業(yè)優(yōu)秀專家就布設樣點、調(diào)查采樣、實驗室檢測標準、實驗室設備儀器配置等帶來分享,為業(yè)內(nèi)同行提供經(jīng)驗借鑒及學習交流機會。
那么,此次研討會上行業(yè)專家和企業(yè)代表都帶來了哪些精彩分享?
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如何運用多證據(jù)分析技術進行場地污染評估?
煜環(huán)環(huán)境科技有限公司是一家專注于土壤、地下水污染防治工程和環(huán)保技術服務咨詢的專業(yè)公司。研討會上,煜環(huán)環(huán)境科技有限公司技術咨詢中心經(jīng)理王恒欽作了題為“多證據(jù)分析技術在某退役場地土壤砷、銻污染評價分析”的匯報。王經(jīng)理介紹了此退役場地項目背景并進行了產(chǎn)排污分析。他認為,確定是否為背景原因污染意義重大,場地存在普遍超標現(xiàn)象且大部分未兜底,對后續(xù)詳調(diào)布點采樣深度、采樣密度意義重大;人為污染所致還是場地的天然高背景所致,關系修復方式、污染責任等問題;對于未來變更土地性質,維護社會穩(wěn)定有很大現(xiàn)實意義。
王經(jīng)理用多證據(jù)分析的方法多角度對此場地進行了評估和分析。最后,王經(jīng)理認為,地塊不同,所選用的多證據(jù)分析及評價的具體方法可能會有差異,建議因地制宜。各地管理要求各異,形態(tài)分析、浸出毒性分析、同位素溯源等可能對分析背景原因有很大幫助,有條件的單位可以進行深入研究。
當前,第三次全國土壤普查已開始,王經(jīng)理認為,全國范圍內(nèi)啟動土壤背景值大比例尺的調(diào)查具有很強的現(xiàn)實意義,土壤污染狀況調(diào)查相關結論性數(shù)據(jù)建議作為成果之一進行共享、分析及研究。
重金屬污染場地治理技術及工程案例
來自世界500強企業(yè)中國五礦和中國中冶骨干子企業(yè)——中國恩菲工程技術有限公司生態(tài)環(huán)境事業(yè)部土壤修復室主任郝建青進行了重金屬污染場地治理技術及工程案例的分享。郝主任介紹了常用的重金屬修復技術以及重金屬污染地塊治理策略可以從土壤中去除和改變其形態(tài)兩方面入手,隨后詳細介紹了固化/穩(wěn)定化技術、土壤淋洗技術、電動修復技術、生物技術修復、水泥窯協(xié)同處置技術以及風險管控技術等7種常用技術。
對于實際案例,郝主任分享了重鋼煉鐵廠原址污染土壤治理修復項目和廣西南寧江南中心項目土壤污染,前者根據(jù)規(guī)劃的用地類型,結合本地塊特征污染物、污染物濃度、污染分布范圍等結論,同時考慮工程實施條件及社會條件等因素,選擇原地異位修復、異地處理或處置兩種修復模式。在確定了技術路線后,工程方案的設計上,郝主任詳細介紹了16項方案主要內(nèi)容。
廣西南寧江南中心項目土壤污染,恩菲負責施工圖設計。郝主任介紹,在設計時,主要以環(huán)保專業(yè)(土壤修復)為主,多專業(yè)協(xié)同配合;以處理工藝為主功能單元,多單元銜接配套;以臨建為主,多種形式建設輔助。隨后一一介紹了在施工設計時需要涉及到的各個專業(yè)領域極其應用。
直推技術在重金屬污染場地調(diào)查與修復中如何應用?
南京貽潤環(huán)境科技有限公司副總經(jīng)理王青薇介紹了直推技術在重金屬污染場地調(diào)查與修復中的應用。王總介紹,直推技術是指通過直推式鉆機將內(nèi)附采樣器、傳感器的鉆桿通過推進、沖擊或振動的方式貫入地層,以快速采集代表性的土壤、土壤氣體和地下水樣品,或通過所裝備的檢測儀器獲取相關數(shù)據(jù)的技術總稱。王總介紹了南京貽潤的EP1000系列便攜式、履帶式直推鉆機、EP2000系列履帶式直推鉆機、EP4000C履帶式直推鉆機以及EP3080工作站,及其在土壤調(diào)查采樣中應用。
對于直推技術在土壤修復中應用,王總認為,直推技術在重金屬污染場地修復中的應用屬于原位修復,可利用不同直推鉆探裝備通過原位注射微生物、活性炭等實現(xiàn)修復重金屬污染土壤與地下水的功能。
重金屬污染修復案例分析及思考
來自永清環(huán)保股份有限公司修復事業(yè)部技術部的部長周虹分享了重金屬污染修復案例分析及思考。周部長對重金屬修復技術進行簡單介紹后,分析了江蘇某電鍍廠案例、河北某項目等,以及其治理過程,河北項目采用了輕度污染土壤(資源化利用) +中度污染土壤(原地異位固化穩(wěn)定化+原地異位化學氧化+阻隔填埋) +砷重度污染土壤(有資質單位處理)方案。
周部長認為,重金屬污染物在小尺度上具有很強的異質性(特別表層土),調(diào)查過程中,采樣點位產(chǎn)生的誤差遠大于對樣本制備和分析產(chǎn)生的總誤差,場調(diào)規(guī)范要求20*20甚至10*10-個單元,常規(guī)采用每個單元一個離散點,會導致調(diào)查結果與后續(xù)修復工程量存在較大差異。此外,現(xiàn)行新的規(guī)范趨勢對調(diào)查過程提出了新要求,采測分離第三方監(jiān)管等,那么數(shù)據(jù)的代表性會成為調(diào)查過程需解決的難點。
在經(jīng)濟效益高的地區(qū),相應處理后端,匹配齊全,相應政策匹配度高,能快速形成重金屬處理下游端;但對于經(jīng)濟效益低的地區(qū),后端缺失,極少有對應接收端,如何處理達到降總量目的?周部長建議從風險評估階段,多方論證風險管控策略。
另,第二屆中國國際土壤修復及油泥治理峰會(SRS2022)將于2022年8月4-5日在山東濟南舉行,敬請關注!
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