本文選題：鐵錳氧化物 + 反沖洗泥�。� 參考：《中國環(huán)境科學》2017年08期

【摘要】：利用X射線粉末衍射(XRD)、透射電子顯微鏡(TEM)、差熱重量分析法(TG)、比表面積分析儀(BET)等研究了除鐵除錳水廠富含鐵錳氧化物的反沖洗泥經(jīng)過不同焙燒溫度處理后的產(chǎn)物結(jié)構(gòu)變化對吸附除砷的影響.結(jié)果表明:鐵錳氧化物反沖洗泥原料為無定型結(jié)構(gòu),粒徑小且比表面積大,能高效除砷;焙燒溫度為150℃時,結(jié)晶水開始脫除,比表面積與孔容變化不大,As(Ⅲ)和As(V)的去除率均略微增加;焙燒溫度為500℃時,脫羥基反應促使微孔逐漸合并成介孔,比表面積降低,As(Ⅲ)和As(V)的去除率降至70%;當焙燒溫度升高到800℃后,熱處理產(chǎn)物脫水完全,微孔和介孔隨焙燒溫度升高逐漸合并成大孔,比表面積和孔容分別下降至12.755m2/g和0.052cm3/g,平均孔徑增長了約10nm,且產(chǎn)生的赤鐵礦晶體顆粒間出現(xiàn)燒結(jié)現(xiàn)象,對As(Ⅲ)和As(V)的去除率大幅下降,為原來的10%左右.
[Abstract]:By means of X-ray powder diffraction (XRD), transmission electron microscope (TEM), differential thermogravimetry (TG) and specific surface area analyzer (BET), the products of iron-removal water plant with rich iron and manganese oxides were studied after different calcination temperature. Effects of structural changes on adsorption and removal of arsenic. The results show that the raw material of iron-manganese oxide backwash mud is amorphous structure, the particle size is small and the specific surface area is large, it can remove arsenic efficiently, and when the calcination temperature is 150 鈩，

本文編號：2100068