In this work, bentonite‐supported Cu(II) complex (B@Cu(II)L) was prepared by a one‐pot method and used as a heterogeneous catalyst for evaluating its catalytic activity in oxidation degradation of hydroxypropyl guar gum (HPGG) in oilfield wastewater. All of the reaction parameters effected degradation efficiency, such as Na₂S₂O₈ concentration, catalyst amount, reaction temperature, and pH value, were investigated in detail. The results showed that the absolute viscosity of HPGG solution can be decreased from 15 to 1.48 mm²/s in presence of 15% Na₂S₂O₈ (mass ratio to HPGG) and 1.5 g/L B@Cu(II)L at 45°C and pH = 10. It was also found that the chemical oxygen demand of HPGG solution catalyzed by B@Cu(II)L decreased from 4,080 to 584 mg/L after 240 min under the optimum experimental conditions. The catalytic activity of supported bivalent copper complexes over bentonite was gradually decreased due to the loss of the active copper.

中文翻译：

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Cu（II）络合活化的过硫酸盐氧化对油田添加剂的非均质降解

在这项工作中，通过单锅法制备了膨润土负载的Cu（II）络合物（B @ Cu（II）L），并用作非均相催化剂来评估其在羟丙基瓜尔胶（HPGG）的氧化降解中的催化活性。在油田废水中。详细研究了影响降解效率的所有反应参数，如Na ₂ S ₂ O _8的浓度，催化剂用量，反应温度和pH值。结果表明，在15％Na ₂ S ₂ O ₈存在下，HPGG溶液的绝对粘度可以从15降低到1.48 mm ² / s。（与HPGG的质量比）和1.5 g / LB @ Cu（II）L在45°C和pH = 10的条件下，还发现B @ Cu（II）L催化的HPGG溶液的化学需氧量从4,080降低在最佳实验条件下，在240分钟后浓度降至584 mg / L。由于活性铜的损失，负载的二价铜络合物对膨润土的催化活性逐渐降低。