【摘要】 氰化提金工艺产生的含氰废水中多含有金属氰络离子,其会消耗额外的氰化物,进而影响生产工艺指标。研究以聚丙烯纤维为基体,制备了酰基化强碱性离子交换纤维(ASA-IEF),并考察了其对废水中金属氰络离子的去除性能。ASA-IEF的最优制备条件为反应时间4 h、反应温度30℃、三氯乙酰氯与苯乙烯摩尔比1∶1.2。在此条件下,纤维增重率44.0%左右。动态吸附试验表明:在水流速度为15.0 mL/min时取得了最佳吸附效果;温度升高,提高了ASA-IEF表面活性基团的吸附能力。采用ASA-IEF处理含氰废水,当其用量为8 g时,氰化物去除效果较好。研究制备的ASA-IEF可为含氰废水中氰化物和有价组分的回收提供一种解决办法。更多还原

【Abstract】 Most of the cyanide-containing wastewater produced by cyanide gold extraction process contains metal cyanide complex ions, which will consume extra cyanide and affect the production process index.In this study, the acylation strong alkaline ion exchange fiber(ASA-IEF) was prepared from polypropylene fiber and its ability to remove metal cyanide complex ions from wastewater was studied.The optimal preparation conditions of ASA-IEF were as follows: reaction time 4 h, reaction temperature 30 ℃,the molar ratio of trichloroacetyl chloride to styrene is 1 ∶1.2.The fiber weight gain rate could reach about 44.0 % under these conditions.Dynamic adsorption experiments showed that the best adsorption effect was achieved when the flow rate of solution was 15.0 mL/min, and the increase of temperature promoted the adsorption of ASA-IEF surface active groups on metal cyanide complex ions.The experimental results on cyanide-containing wastewater treatment showed that the removal effect of ASA-IEF on cyanide was better when the dosage of ASA-IEF was 8 g.The ASA-IEF prepared in this study could provide a solution for the recovery of cyanide and valuable components from cyanide wastewater.更多还原