摘要
以铵明矾结晶法从含有氯化钠的废水中同时回收Al^(3+),NH_4^+和SO_4^(2-)离子,需要铵明矾在不同浓度氯化钠水溶液中的溶解度数据。文中采用静态法测定了铵明矾在283.15—323.15 K范围、氯化钠浓度为0—1.71 mol/kg水溶液中的溶解度。用Apelblat方程和λh方程对铵明矾溶解度实验数据进行了关联。实验表明:铵明矾溶解度随着温度升高而增大;随氯化钠质量摩尔浓度的增加而增大,盐溶效应明显。Apelblat方程和λh方程对铵明矾在氯化钠水溶液中溶解度的关联效果良好,相关系数R^2均大于0.999。采用冷却结晶法可以从含有氯化钠的废水中回收得到铵明矾;Apelblat方程和λh方程可用于关联氯化钠浓度为0—1.71 mol/kg范围内铵明矾的溶解度。
In order to recover Al^3＋,NH4^＋ and SO4^2- from wastewater containing sodium chloride by crystallization of ammonium alum,it is necessary to obtain ammonium alum solubility in different concentrations of sodium chloride.A solubility of ammonium alum in sodium chloride solution with 0-1. 71 mol/kg,283. 15-323. 15 K was determined by a static method. Then the solubility data were correlated by Apelblat equation and λh equation. The results show that the solubility of ammonium alum increases with the increase of temperature and concentration of sodium chloride,and the salt-in effect on the dissolution of ammonium alum is pronounced. The solubility data for ammonium alum in sodium chloride solution are well correlated by Apelblat equation and λh equation,both with the correlation coefficient R^2 over 0. 999. Ammonium alum can be recovered from wastewater containing sodium chloride by cooling crystallization; Apelblat equation and λh equation can be used to correlate the solubility of ammonium alum in sodium chloride solution.
作者
石文媛
戚律
王建浩
冷一欣
王车礼
苏旭平
SHI Wen-yuan;QI Lyu;WANG Jian-hao;LENG Yi-xin;WANG Che-li;SU Xu-ping(School of Petrochemical Engineering;School of Phalanaceutical Engineering and Life Science;School of Materials Science and Engineering,Changzhou University,Changzhou 213164,Jiangsu Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2018年第2期35-40,共6页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(51301028)
江苏省科技厅省工程技术研究中心资助项目(BM2012416)
关键词
铵明矾
氯化钠
固液平衡
溶解度模型
ammonium alum
sodium chloride
solid-liquid equilibrium
solubility model
