Abstract: By the static volumetric flask method, the simultaneous stabilizing capacities of sulphonate copolymer AA/AMPS for PO₄^3- and Zn²⁺ has been studied under different Ca²⁺ concentration and alkalinity conditions. The results show that the effects of Ca²⁺ concentration and alkalinity on the stabilizing capacities of sulphonate copolymer for both PO₄^3- and Zn²⁺ are comparatively larger. Ca²⁺ concentration between 400-600 mg/L is the inflection point of the stabilizing capacity of sulphonate copolymer for PO₄^3-. And, Ca²⁺ concentration between 600-800 mg/L is the inflection point of the stabilizing capacity of sulphonate copolymer for Zn²⁺. When Ca²⁺ concentration is below the inflection point, the stabilizing capacities of sulphonate copolymer for both PO₄^3- and Zn²⁺ are comparatively good. Meanwhile, Ca²⁺ concentration and alkalinity has less influence on the stabilizing capacity of sulphonate copolymer. When Ca²⁺ concentration is higher than the inflection point, the stabilizing capacities of sulphonate copolymer for PO₄^3- and Zn²⁺ are poor. Since the stabilizing capacity of sulphonate copolymer for Ca²⁺ concentration and alkalinity is poor, it is necessary to separately add a kind of water treatment agent which has good scale inhibiting capacity for calcium carbonate, in actual application.

Key words: sulphonate copolymer, Ca²⁺ concentration and alkalinity, Zn²⁺, PO₄^3-, stability

摘要： 通过静态容量瓶法研究了不同钙碱浓度条件下，磺酸盐共聚物AA/AMPS同时稳定Zn²⁺和PO₄^3-的性能。实验结果表明：钙碱浓度对磺酸盐共聚物稳定PO₄^3-和Zn²⁺性能的影响均较大。Ca²⁺介于400～600 mg/L为磺酸盐共聚物对PO₄^3-稳定性的拐点，Ca²⁺介于600～800 mg/L为磺酸盐共聚物对Zn²⁺稳定性的拐点；当Ca²⁺浓度低于拐点时，磺酸盐共聚物对2种离子的稳定性均较好，且受钙碱浓度影响较小；当Ca²⁺浓度高于拐点时，磺酸盐共聚物对2种离子的稳定性均较差。由于磺酸盐共聚物对钙碱的稳定性能较差,实际应用时需单独投加阻碳酸钙垢性能较好的水处理剂。

关键词: 磺酸盐共聚物, 钙碱浓度, Zn²⁺, PO₄^3-, 稳定性

CLC Number: 

• TQ085