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为了开发出吸附容量更大且制备过程更简便的新型重金属吸附剂,仅以三价铁化合物为原料,采用水热法一步合成羟基氧化铁,并用于矿山废水中铜、铁、锌、锰四种重金属的吸附分离。结果表明,在投加量为0.4 g·L-1、原水p H为1.50的情况下,合成的羟基氧化铁吸附剂对废水中重金属的总吸附容量为41.67 mg·g-1,其中铜、铁、锌、锰的吸附容量分别为6.17、19.55、2.22、2.53 mg·g-1。与羧甲基纤维素、活性炭、氧化铁相比,羟基氧化铁吸附剂在较低p H下仍然具有较高的吸附容量,无需事先投加碱性药剂,更适于吸附分离采矿废水中的重金属。
In order to develop a new type of heavy metal adsorbent with larger adsorption capacity and simpler preparation process, the ferric hydroxide was synthesized by one-step hydrothermal method using ferric iron compounds as raw materials only and was used for the production of copper, iron, zinc and manganese in mine wastewater Heavy metal adsorption separation. The results showed that the total adsorption capacity of the synthesized iron oxyhydroxide sorbent to heavy metals in wastewater was 41.67 mg · g-1 with the dosage of 0.4 g · L-1 and p H of raw water of 1.50. Among them, the total adsorption capacity of copper, Iron, zinc, manganese adsorption capacity were 6.17,19.55,2.22,2.53 mg · g-1. Compared with carboxymethyl cellulose, activated carbon and iron oxide, the hydroxy iron oxide adsorbent still has higher adsorption capacity at lower p H, and is more suitable for adsorptive separation of mining wastewater without the need of adding basic reagents in advance Heavy metal.