察尔汗盐湖卤水自然蒸发过程中Ca2＋分布规律研究  

The Distribution Rule of Ca^(2+) in Qarhan Salt Lake Brine during Natural Evaporation Process

作　　者：宋维君[1,2] 杨世忠[1] 马元庆 牟伯中[1] 

机构地区：[1]华东理工大学化学与分子工程学院,上海200237 [2]青海大学,化工学院盐湖系,青海西宁810016 [3]青海盐湖工业股份有限公司,青海格尔木816000

出　　处：《盐湖研究》2017年第4期49-56,共8页Journal of Salt Lake Research

基　　金：“察尔汗盐湖钾肥生产过程中稀贵金属离子迁移规律及赋存状态”(U1507122);“功能化磁性固相萃取剂的制备及在复杂卤水体系铷离子检测中的应用”(2016-ZJ-734)

摘　　要：卤水中钙离子的存在会对盐湖化工生产及其产品质量造成较大影响,研究钙离子在卤水蒸发过程中的分布规律具有重要意义。通过室外自然蒸发及盐田实地采样,研究了察尔汗盐湖盐田生产过程中钙离子分布变化规律。结果表明,在自然蒸发实验中卤水钙离子浓度随蒸发量的增加逐渐减少,在盐田生产现场采样结果显示钙离子浓度随卤水蒸发而增加,结合生产实际,推断外界钙离子补给是造成这种现象的主要原因。因此,避免车间含钙尾水混入,阻止盐田卤水和周边土壤可溶性钙盐间离子交换是有效降低卤水钙离子浓度的主要方法。Calcium ions in brine could damage the quality of products and cause series problems in pro- duction of salt lake. Thus, it was necessary to investigation the distribution rule of calcium ions in brine evaporation process in order to taking the appropriate measures to prevent further affection. In this paper, the distribution rule of Ca2＋ in brine of Qarhan Salt Lake was studied by means of outdoor simulation ex- periment and field sampling. The results show that the Ca2 ＋ concentration in aqueous decreases in simula- ted evaporation experiment and increased in field sampling test as brine evaporation. It was inferred that Ca2＋ invasion took the most responsibility for Ca2＋ concentration increase in brine of salt pan. Thus the existing wastewater recycle should be re-designed and the effect of Ca2 ＋ exchange between brine and sur- rounding soil of salt pan should be prevented.

关 键 词：察尔汗盐湖 卤水蒸发 钙离子分布 

分 类 号：P631.84[天文地球—地质矿产勘探]