离子交换树脂处理三乙胺废水

采用离子交换树脂对废水中三乙胺进行吸附。探讨了静态及动态吸附三乙胺的影响因素,考察了树脂的脱附条件及其吸附稳定性。实验结果表明:RX01型树脂对三乙胺的吸附性能优于HD-81型和D155型树脂;在三乙胺初始质量浓度为1 500 mg/L、初始pH为11.5、吸附时间为2 h、吸附温度为298 K的静态吸附条件下,三乙胺去除率为96.3%,饱和吸附量为145 mg/g,等浓度条件下阳离子影响的大小顺序为Ca~(2+)Mg~(2+)K~(+)Na~(+);当三乙胺初始质量浓度为1 500 mg/L、废水流量为60 BV/h、动态吸附柱高径比为5.37时,穿透体积为70 BV,出水三乙胺质量浓度小于3 mg/L,三乙胺去除率高达99.5%;以2 mol/L的HCl溶液为脱附剂,脱附剂流量为1 BV/h、出水体积为4 BV时,三乙胺的脱附率达94.8%;在最优动态吸附-脱附条件下重复使用10次,树脂性能稳定。

Treatment of Triethylamine-Containing Wastewater with Ion Exchange Resin

Triethylamine（TEA）in wastewater was adsorbed using ion exchange resin. The effects on static and dynamic absorption to TEA were studied,and the desorption conditions and the absorption stability of resin were investigated. The experimental results show that：The adsorption capability of resin RX01 is better than those of resin HD-81 and resin D155;Under the static absorption conditions of initial TEA mass concentration 1 500 mg/L, initial pH 11.5,adsorption time 2 h and adsorption temperature 298 K,the TEA removal rate is 96.3％,the Static saturated adsorption capacity is 145 mg/g,and the influence sequence of cations under the same concentration is Ca²⁺>Mg²⁺>K⁺>Na⁺;When the initial TEA mass concentration is 1 500 mg/L,the wastewater flow is 60 BV/h and the rario of height to diameter of the dynamic absorption column is 5.37,the penetration volume is 70 BV,the mass concentration of TEA in the effluent is less than 3 mg/L with 99.5% of the removal rate;When 2 mol/L HCl solution is used as desorption agent with 1 BV/h of flow and the effluent volume is 4 BV,the TEA desorption rate reaches 94.8%;Furthermore,under the optimum conditions,the resin has good and stable performance after reused for 10 times．