Indonesian Journal of Chemical Research http://ojs3.unpatti.ac.id/index.php/ijcr Indo. J. Chem. Res., 11(1), 65-71, 2023 Study Effect of Chitosan-Epichlorohydrin Macropore Beads on Decreasing the Value of Total Dissolved Solid (TDS) and Dyes in Sasirangan Liquid Waste Treatment Dahlena Ariyani 1 , Nabila Khairiyatul Hilma 2 , Umi Baroroh Lili Utami 2 , Uripto Trisno Santoso 2 , Dwi Rasy Mujiyanti *2 1 Biomaterial Laboratory, Mathematic and Natural Sciences Faculty, Lambung Mangkurat University, Banjarbaru, Indonesia 2 Chemistry Study Program, Mathematic and Natural Sciences Faculty, Lambung Mangkurat University, Banjarbaru, Indonesia * Corresponding Author: drmujiyanti@ulm.ac.id Received: February 2023 Received in revised: February 2023 Accepted: April 2023 Available online: May 2023 Abstract Sasirangan liquid waste contains contaminants that are quite dangerous, characterized by high values of total dissolved solids and dyestuffs. This study aims to determine the effect of dose and pH on chitosan-epichlorohydrin macropore beads. The parameters of the measured waste are total dissolved solids and dyestuffs. The process of absorption of sasirangan liquid waste characterizes by FTIR. The results showed that chitosan- epichlorohydrin beads that interacted with sasirangan liquid waste had optimum results at a chitosan dose of 600 mL/L, with a decrease in the total value of dissolved solid by 2161 mg/L and a decrease in dye by 84.78%. Chitosan-epichlorohydrin beads at pH against total dissolved solid gave optimum results at pH 7 with a reduction in the total dissolved solid value of 2269 mg/L, while pH against dyestuffs gave optimum results at pH 3 with a decrease of 94.09%. The interaction between chitosan and chitosan- epichlorohydrin beads occurred a shift in wave numbers from 943 cm -1 to 932 cm -1 showing the C-O-C group and the chitosan-epichlorohydrin beads spectra with waste at wave numbers 3013-3618 cm -1 to 3007-3631 cm -1 the O-H vibration group overlapped the N-H vibration and showed the result that the beads Chitosan-epichlorohydrin/adsorb sasirangan liquid waste. Keywords: Chitosan, beads, crosslinking method, epichlorohydrin, FTIR. INTRODUCTION The increase in sasirangan fabric production has a positive impact on MSMEs that produce sasirangan fabric but also has a negative effect, namely the occurrence of environmental pollution due to sasirangan waste being directly disposed of without a processing process. Sasirangan liquid waste is wastewater due to sasirangan industry activities that contain chemical substances or contaminants whose amount exceeds the quality standards of the textile industry liquid waste based on the South Kalimantan Governor Regulation No. 04 of 2007. The sasirangan industry produces liquid waste of an average of 200 liters per day for each (Syauqiah, Nurandini, & Lestari, 2020). Sasirangan liquid waste contains high pollutants and is not qualified to be disposed of in the environment. Many dyes are toxic and endanger living things in the sasirangan industry (Khair, 2017). According to Irawati, Utami, & Hanifa (2011) the value of suspended solids was 862 mg/L. Various methods have been carried out to reduce the quality of dyestuffs in sasirangan liquid waste. There are chemically, physically, and biologically, such as coagulation-flocculation (Rusydi, Suherman, & Sumawijaya, 2017) (Hadiwidodo & Huboyo, 2009) (Haryono, Faizal D, Liamita N, & Rostika, 2018) (Hynes et al., 2020). One of the most frequently used methods of various physicochemical processes is adsorption, adsorption has broad advantages in operational, technical, and convenience (Zhou et al., 2012). Commonly used adsorbent types are activated carbon (A Mizwar & Diena, 2012), and chitosan (Andy Mizwar, 2013) (Sillanpää, Ngah, Teong, & Hanafiah, 2011) Chitosan is formed into long polymers through β (1,4) bonding of D-glucosamine polysaccharides that have undergone deacetylation from the main component of chitin compounds found in the shell of Crustacea animals such as crabs and shrimp (Salmahaminati, 2022). The adsorption ability of chitosan improves by being modified physically and DOI: 10.30598//ijcr.2023.11-muj 65