Distribution characteristics and variation rule of dodecyl morpholine in Qarhan Salt Lake area of Qinghai Province
At present,dodecyl morpholine(DMP)is the main reverse flotation reagent used in the production of potash fertilizer in Qarhan Salt Lake area of Qinghai Province,but the concentration and distribution characteristics of DMP in Qarhan Salt Lake area are still unclear.In this study,brine and fresh water from 33 sampling points in Qarhan Salt Lake area were collected,and the concentration of DMP in brine and fresh water samples was quantitatively detected by methyl orange spectrophotometry,to analyze the concentration and distribution characteristics of DMP in the lake area.The results showed that:(1)the spatial distribution of DMP concentration in Qarhan Salt Lake area was low as a whole but high in some areas.(2)In different types of water bodies collected in the lake area,the concentration of DMP presented the distribution characteristics of brine in production line＞brine in salt field＞brine in salt lake＞fresh water≈ brine in brine extraction canal,with the concentration ranging from 0.06 to 18.90 mg/L,and an average value of 2.16 mg/L.(3)DMP in brine was affected by pH,conductivity,Na+,K+and Mg2+.
Qarhan Salt Lakeflotation reagentDMPdistribution characteristicsvariation rule
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