最佳浓度范围 meaning in English

optimum range of concentration

In a word , wbaer can effectively remove micro - quantity hmi from dk with alkali metals , alkaline - earth metals and anions at high concentration . on the basis of lots of regeneration experiments of wbaer ( d301g ) , the best regeneration manner ( regurgitation regeneration ) , the optimal regeneration agents ( h2so4 and naoh ) and the optimum operating parameters of regeneration are obtained
论文进而对d301g型弱碱性阴离子交换树脂进行了再生试验研究，确定了最佳再生方式（逆流再生），最佳再生剂（ h2so4和naoh ）以及酸液再生时的最佳浓度范围（ 2 % 4 % ）和最佳流速范围（ 3 4m / h ）；并通过正交试验确定了逆流再生过程中的最佳运行参数组合。