TY - JOUR AU - SIRIRAK, Jitnapa AU - SUPPHARATTHANYA, Ployphat AU - CHANTHA, Kedsarin AU - GIRDTHEP, Sutinee AU - CHAYABUTRA, Supanee PY - 2021/06/27 Y2 - 2024/03/29 TI - Eco-friendly lake pigment from sappanwood: Adsorption study and its application as natural colorant for natural rubber toy balloon JF - Journal of Metals, Materials and Minerals JA - J Met Mater Miner VL - 31 IS - 2 SE - Original Research Articles DO - 10.55713/jmmm.v31i2.1009 UR - https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1009 SP - 27-37 AB - <p class="western" align="justify"><a name="_Hlk69250253"></a><span><span style="font-size: small;"><span style="font-family: Times New Roman, serif;"><span lang="en-GB">Due to the awareness of the impact of synthetic dye on human health and the environment, natural dye and lake pigment have attracted considerable attention from researcher. Herein, pink−red lake </span></span><span style="font-family: Times New Roman, serif;"><span lang="en-GB">pigment from sappanwood was prepared using adsorption approach. The effects of initial pH, pH and</span></span> <span style="font-family: Times New Roman, serif;"><span lang="en-GB">concentration of brazilein solution, dosage of aluminium hydroxide, and adsorption time on adsorption</span></span><span><span lang="en-GB"><span style="font-family: Times New Roman, serif;"> were also explored. Results showed that the maximum adsorption capacity of 30 mg</span><span style="font-family: Symbol, serif;"> </span></span></span><span style="font-family: Times New Roman, serif;"><span lang="en-GB">g</span></span><sup style="font-family: Calibri, serif;"><span style="font-family: Times New Roman, serif;"><span lang="en-GB">-1</span></span></sup><span style="font-family: Times New Roman, serif;"><span lang="en-GB"> was achieved </span></span><span><span lang="en-GB"><span style="font-family: Times New Roman, serif;">when 0.25%w/v of aluminium hydroxide and 100 mg</span><span style="font-family: Symbol, serif;"> </span></span></span><span style="font-family: Times New Roman, serif;"><span lang="en-GB">L</span></span><sup style="font-family: Calibri, serif;"><span style="font-family: Times New Roman, serif;"><span lang="en-GB">-1</span></span></sup><span style="font-family: Times New Roman, serif;"><span lang="en-GB"> of brazilein solution were applied. The adsorption</span></span><span style="font-family: Times New Roman, serif;"><span lang="en-GB"> kinetics and adsorption isotherm fitted the pseudo second order model and Langmuir isotherm, respectively. Additionally, this lake pigment can be utilized as a natural colorant for natural rubber toy balloons, which could made toy balloon safer for children than synthetic dye. Thus, our lake pigment can be an alternative choice of safe and environmental friendly colorant for products including toys.</span></span></span></span></p> ER -