en Original Research <span style="font-size:10pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="background:white"><span cambria="" style="font-family:"><span style="color:#7030a0">Aims:</span></span></span></b> <span cambria="" style="font-family:">Utilizing inexpensive, non-toxic, wide outside face area as eco-friendly sorbent has been</span><b> </b><span cambria="" style="font-family:">studied as a great replacement compound instead of high-priced toxic adsorbent stuff such as </span><span style="background:white"><span cambria="" style="font-family:">malachite green </span></span><span cambria="" style="font-family:">remover from wastewater.</span><span style="background:white"><span style="font-family:"Cambria",serif"></span></span></span></span></span><br> <span style="font-size:10pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="background:white"><span cambria="" style="font-family:"><span style="color:#7030a0">Materials & Methods:</span></span></span></b> <span style="background:white"><span cambria="" style="font-family:">LaMnO₃ nanoparticles were used as a suitable adsorbent for malachite green removal from aqueous solutions. Adsorption values were investigated by changing contact time parameters, pH, temperature, adsorbent dosage, and initial dye concentration. Maximum adsorption capacity was 27.027mg.g^-1 for 0.007g of LaMnO₃. Various kinetic models were used to describe the kinetic data, and the first kinetic model was consistent with the results. The thermodynamic parameters of the LaMnO₃ adsorption process, such as Gibbs free energy (&Delta;G0), standard enthalpy change (&Delta;H0), and standard entropy change (&Delta;S0), were calculated. All the chemicals were analytical grade and used without further purification. For LaMnO₃, the following materials were used: H₂O, La(NO₃)₃, MnCl₂, and KMnO₄, prepared via the hydrothermal method. The synthesized adsorbent was detected by FTIR, XRD, FESEM, and TEM analysis.</span></span><span style="background:white"><span style="font-family:"Cambria",serif"></span></span></span></span></span><br> <span style="font-size:10pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="background:white"><span cambria="" style="font-family:"><span style="color:#7030a0">Findings:</span></span></span></b><span style="background:white"><span cambria="" style="font-family:"> The process was spontaneous and endothermic due to the negative Gibbs free energy and the positive integrity of the enthalpy.</span></span><span style="background:white"><span style="font-family:"Cambria",serif"></span></span></span></span></span><br> <span style="font-size:10pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="background:white"><span cambria="" style="font-family:"><span style="color:#7030a0">Conclusion:</span></span></span></b> <span style="background:white"><span cambria="" style="font-family:">The adsorbent&#39;s performance in removing dyes from the aqueous medium has shown that it can be used as an effective and inexpensive adsorbent in treating a variety of colored sewage.</span></span></span></span></span><br> &nbsp; Lamno3 Nanoparticle,Malachite Green,Isotherm, Kinetics,Thermodynamics, 19 29 http://gmedicine.de/browse.php?a_code=A-10-1-38&slc_lang=en&sid=2 F. Abbasinohoji 10031947532846001339 10031947532846001339 No Department of Chemistry, Semnan University, Semnan, Iran M. Fazli 10031947532846001340 10031947532846001340 Yes Department of Chemistry, Semnan University, Semnan, Iran F. Salehian 10031947532846001341 10031947532846001341 No Department of Chemistry, Semnan University, Semnan, Iran A. Arabi 10031947532846001342 10031947532846001342 No Department of Chemistry, Semnan University, Semnan, Iran