Copper contamination of industrial waste streams is increasingly common with copper used in an array of industrial processes. Phytoremediation of copper-contaminated water with Pistia stratiotes presents a cost-effective, efficient and uncomplicated alternative for copper removal from industrial wastewater. This study examines the ability of Pistia stratiotes to remove copper from distilled water representing a highly nutrient-deficient medium and natural surface water containing plant nutrients inherently. Control and experimental sets were set up with growth solutions of distilled water and natural surface water spiked with 5 g/mL, 10 g/mL, 15 g/mL, 20 g/mL and 25 g/mL copper. The control sets were devoid of Pistia stratiotes while the experimental sets contained Pistia stratiotes. Copper concentration and pH of the solutions were tracked over 10 days. This study revealed the ability of Pistia stratiotes to remove copper in both types of growth solution with contamination level ranging from 5 to 25 mg/L and pointed to its ability to phytoremediate higher level of copper contamination. Pistia stratiotes also raised the pH of the growth solutions. Copper removal from both types of growth solution demonstrated a predominantly first-order elimination kinetics except for copper concentrations above 15 mg/L in distilled water where the zero-order elimination kinetics predominated. Copper removal efficiency decreased with increasing copper concentrations in both types of growth solution with removal efficiency in natural surface water growth solutions consistently higher. It highlights the ability of Pistia stratiotes to phytoremediate highly nutrient-deficient and natural surface water media.

工业废水中的铜污染越来越多地用于一系列工业过程中。用Pistia条纹对铜污染的水进行植物修复是从工业废水中去除铜的一种经济高效，高效且简单的替代方法。这项研究检查了水浮萍层从蒸馏水中去除铜的能力，蒸馏水代表高度缺乏营养的培养基和天然地表层水，其固有地含有植物营养。用蒸馏水和天然地表水加5 g / mL，10 g / mL，15 g / mL，20 g / mL和25 g / mL铜的生长溶液设置对照组和实验组。对照组没有Pistia条纹而实验组包含Pistia条纹。在10天内跟踪溶液中的铜浓度和pH。这项研究揭示了Pistia层在两种生长溶液中去除铜的能力，污染水平范围为5至25 mg / L，并指出了其对植物进行铜离子去除的能力。水浮萍也提高了生长溶液的pH值。从两种类型的生长溶液中除去铜均表现出主要的一级消除动力学，但蒸馏水中铜的浓度高于15 mg / L时，其中零级消除动力学占主导。随着两种生长溶液中铜浓度的增加，铜去除效率降低，而天然地表水生长溶液中的去除效率始终较高。它强调了水浮萍层对植物的营养修复能力，该技术可以高度营养缺乏和天然地表水。