Muammar Qadafi, Diana Rahayuning Wulan, Raden Tina Rosmalina, Retno Wulandari, Wisnu Prayogo, Rosetyati Retno Utami, Yusuf Eka Maulana, Suprihanto Notodarmojo, Yuniati Zevi
Absorbance differential spectra could be utilized to identify dissolved organic matter (DOM) characteristics such as the disinfection by products (DBPs) formation. This research purposed to establish the relationship between absorbance differential spectra and trihalomethanes-4 (THM4) formation potential, as well as the estimated cytotoxicity of tropical peat water DOM percentage. The ion exchange resin was used to separate the DOM components from peat water. In addition, the UV–Vis spectrum was examined between 200 and 700 nm. The hydrophobic-acid (HPOA) fraction contains the highest concentration of dissolved organic carbon (DOC), THM4 production potential, and calculated cytotoxicity. On the other hand, the hydrophilic-neutral (HPIN) fraction has the lowest potential THM4 production. The UV–Vis absorbance spectra of all DOM fractions showed a comparable peak at 277 nm. The differential spectra of 277 nm (ΔA277) indicated a significant association with DOC concentration (99.6 %), trichloromethane (TCM) creation (86.6 %), total-THM4 (TTHM4) (81.3 %) formation, THM4 estimated cytotoxicity (89.7 %), and a moderate correlation with bromodichloromethane (BDCM) formation (55.6 %). Meanwhile, ΔA277 had a poor correlation with brominated THM4 formation potential (chlorodibromomethane (CDBM): 2.59, tribromomethane (TBM): 2.78 %). The absorbance differential spectra might be employed as a surrogate measure for the peat water DOM fraction and its precursor properties to form THM4 during the chlorination process, as well as its estimated cytotoxicity. © 2023 The Authors
Research Center for Environmental and Clean Technology, National Research and Innovation Agency, Jalan Sangkuriang, Bandung, 40135, Indonesia; Chemical Engineering Department, Faculty of Engineering, Universitas Bhayangkara Jakarta Raya, Jl. Harsono RM No. 67, Jakarta, Indonesia; Department of Building Engineering Education, Universitas Negeri Medan, Medan, 20221, Indonesia; Research Center for Limnology and Water Resources, National Research and Innovation Agency, Jalan Raya Jakarta-Bogor KM. 46, Cibinong, Bogor, 16911, Indonesia; Organic Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung, 40132, Indonesia; Water and Wastewater Engineering Research Group, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan. Ganesha 10, Bandung, 40132, Indonesia
