求翻译：活性碳中含有微量的Zn2+、Fe3+、Ca2+及磷酸盐等，这些杂质使活性碳本身带有电荷，影响其吸附效果，故须对其进行预处理。预处理过程为：取一定量的活性炭（颗粒状），用15%的乙酸浸泡1.5h，用蒸馏水洗涤至中性，干燥，在120℃下活化4h。是什么意思？

Contain trace amounts of Zn2 + activated carbon in fe3 +, ca2 + and phosphate, etc., these impurities to make activated carbon with a charge affecting the adsorption effect is therefore subject to its pretreatment. The pretreatment process is as follows: take a certain amount of activated carbon (gr

Activated carbon contains a trace of Fe Zn 2+, 3+, 2+ and Ca phosphate, these impurities such as the activated carbon has its own charge, and impact their adsorption effect, it would be necessary to pre-process it. Pre-processing procedure is: take a certain amount of activated carbon (GAC), with 15

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Activated carbon containing traces of Zn2+, Fe3+, Ca2+ and phosphate, these impurities allow itself, with activated carbon charge, affecting its adsorption effect, it is necessary to preprocess it. Pretreatment: take a certain amount of activated carbon (granulated), 15% 1.5h acetic acid soaking, wa

In the activated carbon includes micro Zn2+, Fe3+, Ca2+ and the phosphate and so on, these impurities enable activated carbon itself to have the electric charge, affects its adsorption effect, therefore must carry on the pretreatment to it.The pretreatment process is: Takes the ration (granulated) t