本文選題：內(nèi)蒙古 + 動(dòng)力學(xué)　； 參考：《水文地質(zhì)工程地質(zhì)》2017年02期

【摘要】：含水層沉積物中含鐵礦物的特征與活性會(huì)影響砷的遷移轉(zhuǎn)化行為。通過內(nèi)蒙古含水層沉積物含鐵礦物的溶解、還原動(dòng)力學(xué)實(shí)驗(yàn),研究了沉積物含鐵礦物特征和活性及其與砷運(yùn)移的關(guān)系。結(jié)果表明,沉積物中具還原活性的鐵氧化物總量(m0)與巖性有關(guān),細(xì)砂為5.2μmol/g,黏土為45μmol/g。初始還原速率k'均在10-5s-1的數(shù)量級(jí)。表征活性均勻度的參數(shù)γ值介于合成鐵氧化物礦物和表層沉積物之間。沉積物中Fe(Ⅲ)氧化物的還原活性主要介于人造纖鐵礦與針鐵礦的活性水平范圍內(nèi)。沉積物中可能存在兩類活性水平不同的Fe(Ⅲ)氧化物。As更傾向于吸附在活性較強(qiáng)的Fe(Ⅲ)氧化物上。還原環(huán)境中,活性較強(qiáng)的Fe(Ⅲ)氧化物的還原性溶解,促進(jìn)了沉積物中砷的釋放。
[Abstract]:The characteristics and activities of Fe-bearing minerals in aquifer sediments affect the migration and transformation of arsenic. Based on the kinetic experiments of dissolution and reduction of iron-bearing minerals in the sediments of Inner Mongolia aquifer, the characteristics and activities of iron-bearing minerals in sediments and their relationship with arsenic transport were studied. The results show that the total amount of iron oxides with reducing activity in sediments is related to lithology, the fine sand is 5.2 渭 mol / g, and the clay is 45 渭 mol / g. The initial reduction rate k'is in the order of magnitude of 10-5s-1. The parameter 緯 value of activity uniformity is between synthetic iron oxide minerals and surface sediments. The reduction activity of Fe (鈪，

本文編號(hào)：1979425