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在聚合物驱过程中，采出液中有时含有一定浓度和较大相对分子质量的聚丙烯酰胺，使溶液粘度增加。为了净化水质，便于污水再利用，需要破坏聚合物分子链，降低水溶液的粘度。通过测定体系的粘度损失值，研究了Ｆｅ２＋，Ｓ２Ｏ２－８等物质对聚合物的降解作用，考察了降解剂浓度、温度、酸度等因素对反应的影响。在４５℃条件下，当体系中Ｓ２Ｏ２－８，Ｆｅ２＋质量浓度分别为７０ｍｇＬ－１和１０ｍｇＬ－１时，１ｈ内可使质量浓度为２００～２０００ｍｇＬ－１的聚合物溶液粘度损失达９０％以上。
In the process of polymer flooding, the produced fluid sometimes contains polyacrylamide with a certain concentration and relatively large molecular weight to increase the viscosity of the solution. In order to purify the water quality and facilitate the reuse of sewage, it is necessary to destroy the polymer molecular chain and reduce the viscosity of the aqueous solution. By measuring the viscosity loss of the system, the degradation of polymers by Fe2 +, S2O2-8 and other substances was studied. The effects of degradation agent concentration, temperature and acidity on the reaction were investigated. Under the condition of 45 ℃, when the concentration of S2O2-8 and Fe2 + were 70mgL-1 and 10mgL-1 respectively, the viscosity of polymer solution with mass concentration of 200-2000mgL-1 could reach more than 90% within 1h.