本文選題：螯合型表面活性劑 + 吸附　； 參考：《中國環(huán)境科學(xué)》2017年04期

【摘要】：采用批平衡試驗(yàn)法,研究了新型螯合型表面活性劑N-十二�；叶啡宜徕c(N-LED3A)在土壤上的吸附特征,并探討了pH值、溫度、離子強(qiáng)度和水土比對(duì)N-LED3A在土壤上的吸附影響.結(jié)果表明:準(zhǔn)二級(jí)動(dòng)力學(xué)方程適合描述N-LED3A在土壤上的吸附過程.Langmuir、Freundlich和Dubinin-Radushkevich(D-R)吸附等溫方程均可較好地用于擬合吸附行為.土壤有機(jī)質(zhì)和粘土礦物對(duì)N-LED3A在土壤上的吸附起到重要作用.溶液pH值對(duì)N-LED3A在土壤上的吸附有顯著影響,隨pH值增大(5~11),N-LED3A在土壤上的吸附量明顯減小.N-LED3A濃度低于1000mg/L時(shí),升高溫度(25,35,45℃)對(duì)吸附量影響不大,但當(dāng)濃度大于3000mg/LT,吸附量隨溫度的升高有所_低.N-LED3A在土壤上的吸附量隨離子強(qiáng)度增大而增加.N-LED3A吸附量隨水土比變化順序?yàn)?水土(20:1)水土(40:1)水土(80:1).
[Abstract]:The adsorption characteristics of a new chelating surfactant N-dodecyl ethylenediamine triacetate (N-LED3A) on soil were studied by batch equilibrium test. The effects of pH, temperature, ionic strength and water / soil ratio on the adsorption of N-LED3A on soil were discussed. The results showed that the quasi-second-order kinetic equation was suitable to describe the adsorption process of N-LED3A on soil. The adsorption isotherm equations of Dubinin-Radushkevich (D-R) and Langmuir-Freundlich (D-R) could be used to fit the adsorption behavior. Soil organic matter and clay minerals play an important role in N-LED 3A adsorption on soil. The pH value of the solution had a significant effect on the adsorption of N-LED3A on soil. With the increase of pH value, the adsorption capacity of N-LED3A on soil decreased significantly. When the concentration of N-LED3A was lower than 1000 mg / L, the increase of temperature (25 鈩，

本文編號(hào)：2104761