IR, XRD, SEM and TEM analyses show that crystalline minerals in the iron hydroxide sediments are mainly weakly-crystallized goethite with small amounts of illite and montmorillonite.

• 铁质析出物的XRD、IR、SEM和TEM分析表明,氢氧化铁的结晶程度较低,主要结晶相为针铁矿,其次为少量伊利石、蒙脱石和石英。