ارزیابی قابلیت گیاه بیابانی علف‌شور در حذف رنگزای مالاشیت‌گرین از پساب

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه طبیعت، دانشکده کشاورزی و منابع طبیعی، دانشگاه اردکان، اردکان، ایران، صندوق پستی: 184

10.30509/jcst.2025.167597.1265

چکیده

در پژوهش حاضر، قابلیت گیاه بیابانی علف‌شور بدون هیچگونه پیش‌پردازش، در حذف رنگزای مالاشیت­گرین (MG) به بررسی گذاشته شد، زیرا که این حالت می‌تواند به­‌عنوان یک گزینه اقتصادی و زیست‌محیطی مناسب در حذف آلودگی رنگی، مطرح شود. آزمایش‌های جذب در شرایط غلظت اولیه رنگزای MG، از mg l-110 تا  mg l-170 ، غلظت جاذب، mg l⁻¹10 تا mg l⁻¹200، زمان تماس 2 تا 20دقیقه و pH (4 تا10) انجام شد. بیشترین حذف رنگزای MG  در غلظت اولیه رنگزای  mg l-1 50، غلظت جاذب mg l⁻¹ 60، زمان تماس 6 دقیقه و 7=pH رخ داد، که در این شرایط حدود 11/92 درصد رنگ حذف گردید. ظرفیت جذب بهینه جاذب در این شرایط حدود mg g-1 10/64 به دست آمد. مدل ایزوترم لانگمویر و همچنین مدل سینتیک شبه مرتبه دوم، به دلیل ضرایب همبستگی بالا، توانستند داده‌های تعادلی را به خوبی توصیف کند. ارزیابی­های پارامترهای ترمودینامیکی نشان داد که مکانیسم فرایند جذب توسط یک فرایند گرماگیر است. طبق نتایج آزمایش‌ها، علف شور یک جاذب سازگار با محیط زیست برای حذف MG از محلول آبی است، که از نظر هزینه نیز مقرون به صرفه است و می‌تواند در رفع تقاضای رو به افزایش برای جاذب‌های مورد استفاده در فرایندهای حفاظت از محیط زیست، مفید باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of the Ability of Sasola Plant to Remove Malachite Green Dye from Wastewater

نویسندگان [English]

  • Mahdi Tazeh
  • Saeideh Kalantari
Department of Nature Engineering, Faculty of Agriculture and Natural Resources, Ardakan University, P.O. Box: 184, Ardakan, Iran.
چکیده [English]

In the present study, the ability of the desert plant Sasola to remove malachite green (MG) dye without any pretreatment was investigated, because this condition can be considered a suitable economic and environmental option for removing colored pollution. Adsorption experiments were performed under conditions of initial MG dye concentration (110 to 170 mg L-1), adsorbent concentration (10 to 200 mg L-1), contact time (2 to 20 min), and pH (4 to 10). The highest MG removal occurred at an initial dye concentration of 50 mg/L, an adsorbent concentration of 60 mg/L, a contact time of 6 min, and a pH of 7, in which about 92.11 % of the dye was removed. The optimum adsorption capacity of the adsorbent under these conditions was about 1.64 mg g-1. The Langmuir isotherm model as well as the pseudo-second-order kinetic model were able to describe the equilibrium data well due to the high correlation coefficients (R2). The thermodynamic parameters were evaluated and showed that the adsorption process mechanism is an endothermic process. According to the experimental results, salt grass is an environmentally friendly adsorbent for removing MG from aqueous solutions, which is also cost-effective and can be useful in meeting the increasing demand for adsorbents used in environmental protection processes.

کلیدواژه‌ها [English]

  • Malachite green
  • Salsola spp
  • Adsorption
  • Langmuir isotherm
  • Kinetics
  • Endothermic process

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