While the dosage of potassium permanganate was increased, residualconcentration of potassium permanganate was decreased.
随着高锰酸钾投量增加，高锰酸钾剩余量降低。
2
The statistical analysis also showed that the lower the water turbidity, the higher the water temperature, resulting in lower residualconcentration of aluminum.
统计分析还表明，水的浊度越低、水温越高，则残留铝浓度越低。
3
The repeated sampling showed that the aluminum concentration in the same city varies with time. In general, the more the coagulant dosage, the high residualconcentration of aluminum is.