四川环境
四川環境
사천배경
2012年
6期
32-37
,共6页
铅%清洗剂%粒径%清洗时间
鉛%清洗劑%粒徑%清洗時間
연%청세제%립경%청세시간
Lead%washing agents%particle size%washing time
为探索不同清洗剂对铅蓄电池厂区内铅污染土壤的去除效果及铅在不同粒径土壤清洗过程中的行为，本研究通过设定清洗剂的浓度梯度，对土样粒径分级、设定清洗时间等方法进行研究。结果显示EDTA和EDDS对铅具有最佳去除率（B点土107．19％和96．49％）；盐酸对A点土最佳铅去除率为49．57％，B点、C点土在99．03％和89．93％；柠檬酸对3点位土的铅去除率最大为39．51％；鼠李糖脂对3份土铅去除率均低于10％。EDTA和EDDS在高浓度铅的去除中表现优势；柠檬酸适合去除中低浓度铅；盐酸的使用需考虑土壤本身情况。粗沙粒和细沙粒中的铅去除率高，粉粘粒的铅去除率低；最佳清洗时长为240min。此外，土壤本身理化性质对清洗剂效果的发挥有影响，清洗剂浓度过高可能降低清洗效率。该研究可为铅污染土壤清洗技术提供科学依据。
為探索不同清洗劑對鉛蓄電池廠區內鉛汙染土壤的去除效果及鉛在不同粒徑土壤清洗過程中的行為，本研究通過設定清洗劑的濃度梯度，對土樣粒徑分級、設定清洗時間等方法進行研究。結果顯示EDTA和EDDS對鉛具有最佳去除率（B點土107．19％和96．49％）；鹽痠對A點土最佳鉛去除率為49．57％，B點、C點土在99．03％和89．93％；檸檬痠對3點位土的鉛去除率最大為39．51％；鼠李糖脂對3份土鉛去除率均低于10％。EDTA和EDDS在高濃度鉛的去除中錶現優勢；檸檬痠適閤去除中低濃度鉛；鹽痠的使用需攷慮土壤本身情況。粗沙粒和細沙粒中的鉛去除率高，粉粘粒的鉛去除率低；最佳清洗時長為240min。此外，土壤本身理化性質對清洗劑效果的髮揮有影響，清洗劑濃度過高可能降低清洗效率。該研究可為鉛汙染土壤清洗技術提供科學依據。
위탐색불동청세제대연축전지엄구내연오염토양적거제효과급연재불동립경토양청세과정중적행위，본연구통과설정청세제적농도제도，대토양립경분급、설정청세시간등방법진행연구。결과현시EDTA화EDDS대연구유최가거제솔（B점토107．19％화96．49％）；염산대A점토최가연거제솔위49．57％，B점、C점토재99．03％화89．93％；저몽산대3점위토적연거제솔최대위39．51％；서리당지대3빈토연거제솔균저우10％。EDTA화EDDS재고농도연적거제중표현우세；저몽산괄합거제중저농도연；염산적사용수고필토양본신정황。조사립화세사립중적연거제솔고，분점립적연거제솔저；최가청세시장위240min。차외，토양본신이화성질대청세제효과적발휘유영향，청세제농도과고가능강저청세효솔。해연구가위연오염토양청세기술제공과학의거。
To explore the lead removal of different washing agents for soil polluted by lead in lead battery factory and the lead behavior during washing process in soils with different sized particles, this paper studies the size grading of the soil particles and setting the washing time based on setting different concentration gradient of washing agents. The results show that the optimal lead removal rates of EDTA and EDDS are 107.19% and 96.49% respectively for the soil at site B; and that of hydrochloric acid for soils at point A, B and C are 49.57% , 99.03% and 89.93% ; for soils at the three point, the highest remove rate of citric acid is 39.51% , while all the three removal rates of rhamnolipid are less than 10% ; EDTA and EDDS performances show advantage in soil polluted by high concentration lead; citric acid is suitable for soil with medium or low lead concentration; application of hydrochloric acid should consider the soil situation. The lead removal rates are high for coarse sands and fine sands, but low for the silt soil; the optimum washing time is 240 minutes. In addition, the physical and chemical properties of soil affect the washing performance, and over high washing agent concentration may reduce the efficiency. This study provides scientific basis for the technology of washing soil polluted by lead.
