en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <span style="font-size:10.5pt"><span style="line-height:12.0pt"><span style="tab-stops:97.8pt"><span new="" roman="" style="font-family:" times=""><span style="font-size:12.0pt">Activated carbon preparation from tamarind wood derived charcoal by microwave-assisted sodium chloride activation was studied to investigate the effects of 0-5 wt.% NaCl and 450-850 W microwave heating power.&nbsp; The properties of the derived products were analyzed by FTIR, XRD, SEM-EDS, and BET. Methylene blue adsorption by the activated carbon products was also studied to evaluate the contract time, pH, methylene blue concentration, and adsorption isotherms. The study&rsquo;s results showed that the percent yields (77.42-92.52%) of the fabricated activated carbons decrease with increasing wt.% of NaCl and MP. On the other hand, the contents of disordered graphitic carbon, carbonate, basic surface functional groups, and mesopores increased. However, 3 wt.% NaCl and 600 W microwave irradiation power were identified as appropriate conditions for activation, which created the micro-mesopore (pore size range 1.59 -14.76 nm) on the surface of the derived activated carbon products. Optimal values of equilibrium time and pH for methylene blue adsorption are 60 minutes and 8, respectively.&nbsp; The results of methylene blue concentrations were fitted to the Langmuir isotherm indicating 33.33</span> <span style="font-size:12.0pt">mg/g as the maximum methylene blue adsorption capacity.</span><span style="font-size:12.0pt"></span></span></span></span></span> tamarind wood charcoal,activated carbon,sodium chloride,methylene blue,Microwave irradiation 32 48 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-5283-2&slc_lang=en&sid=1 Sumrit Mopoung sumritm@nu.ac.th 1800319475328460021118 1800319475328460021118 Yes Chemistry Department, Faculty of Science, Naresaun University Khachidapron Seeoon khachidaprons59@nu.ac.th 1800319475328460021119 1800319475328460021119 No Chemistry Department, Faculty of Science, Naresuan University