發(fā)布時間：2018-04-02 13:04

  本文選題：土壤修復(fù)　切入點：電動修復(fù)技術(shù)　出處：《安徽理工大學(xué)》2017年碩士論文

【摘要】：土壤重金屬污染是環(huán)境污染防治領(lǐng)域的重要研究方向之一,傳統(tǒng)的修復(fù)技術(shù)工程量大、易產(chǎn)生二次污染。本研究采用原位電動修復(fù)技術(shù)去除受多種重金屬污染沙質(zhì)土壤中的鋅(Zn)、鉻(Cr)、銅(Cu)、鎳(Ni)、鉛(Pb)、鎘(Cd)六種重金屬污染物,選取泰興某處受化工廠固體廢棄物污染的土壤區(qū)域為實驗場地,以場地內(nèi)50-150 cm范圍內(nèi)土壤重金屬為實驗對象。在實驗過程中,對電極電流、電解液參數(shù)(pH值、電導(dǎo)率、氧化還原電位和溫度)和修復(fù)前后土壤中六種重金屬污染物含量進行監(jiān)測分析。結(jié)果證明,電動修復(fù)技術(shù)對沙質(zhì)土壤中六種重金屬具有非常好的去除成效,土壤在50-100 cm深度范圍內(nèi)重金屬去除率分別為:Zn(57.7%)、Cr(60.5%)、Cu(67.2%)、Ni(42.7%)、Pb(32.2%)、Cd(75.0%);在100-150cm范圍內(nèi)重金屬去除率分別為:Zn(94.3%)、Cr(71.9%)、Cu(82.9%)、Ni(35.6%)、Pb(81.1%)、Cd(68.4%);電極電流隨著修復(fù)時間增加而逐漸增大,直至平穩(wěn);2個月的設(shè)備能耗為8164.74 kW·h,用電費用為6531.79元;電解液pH值和溫度在正常范圍內(nèi)波動,氧化還原電位基本為正值;不同電極電解液電導(dǎo)率隨修復(fù)時間的增加,陰極電解液電導(dǎo)率先增大后穩(wěn)定,陽極總體保持穩(wěn)定。該研究為重金屬污染土壤的電動修復(fù)工程應(yīng)用提供了一定的參考,該技術(shù)修復(fù)效果好、時間短、工程量小,具有十分廣泛的應(yīng)用前景。
[Abstract]:Soil heavy metal pollution is one of the important research directions in the field of environmental pollution prevention and control. It is easy to produce secondary pollution. In this study, in situ electrokinetic remediation technique was used to remove six kinds of heavy metal pollutants from sandy soils contaminated by many heavy metals, such as Zn ~ (2 +), Cr ~ (2 +), Cr ~ (2 +), Cu ~ (2 +), Ni ~ (2 +), Pb ~ (2 +), CD ~ (2 +) ~ (2 +). The soil area contaminated by solid waste of chemical plant in Taixing was selected as the experimental site, and the heavy metals in the soil in the range of 50-150 cm were selected as experimental objects. During the experiment, the electrode current, electrolyte parameters, pH value and conductivity were measured. The redox potential and temperature) and the contents of six heavy metal pollutants in soil before and after remediation were monitored and analyzed. The results show that the electrokinetic remediation technology has a very good effect on the removal of six heavy metals in sandy soil. In the range of 50-100 cm, the removal rates of heavy metals in the soil are respectively:% ZnZn 57.7cm, 60.5%. The electrode current increases gradually until the repair time increases, and the removal rate of heavy metals in the range of 100-150cm is 8164.74 kW / h, the cost is 6531.79 yuan respectively, and the electrode current increases gradually until the recovery time increases, and the energy consumption of the equipment increases to 6531.79 yuan (RMB) for 2 months, and the removal rate of heavy metals in the soil is 77.77.7cm / cm, respectively, and the electrode current increases gradually until the repair time increases, and the cost of the equipment is 6531.79 yuan (RMB), respectively, for the removal rate of heavy metals in the range of 50-100 cm. The removal rates of heavy metals in the soil are as follows: (1) in the 100-150cm range, the removal rates of heavy metals are: (1) the removal rate of heavy metals in the soil is 57.77.7cm in depth, and the removal rates of heavy metals in the soil are as follows: 1. The pH and temperature of electrolyte fluctuated in the normal range, and the redox potential was basically positive. The conductivity of different electrode electrolyte increased first and then stabilized with the increase of repair time. The study provides a reference for the application of electrically operated remediation of heavy metal contaminated soil. The technology has a good effect, short time, small amount of engineering, and has a very wide application prospect.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X53

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