Po-Neng ChiangOu-Yang TongChyow-San ChiouYu-An LinMing-Kuang WangLiu, Cheng-ChungCheng-ChungLiu2024-12-262024-12-262016-01-1503043894https://www.scopus.com/record/display.uri?eid=2-s2.0-84941287076&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/724412A liquid fertilizer obtained through food-waste composting can be used for the preparation of a dissolved organic carbon (DOC) solution. In this study, we used the DOC solutions for the remediation of a Zn-contaminated soil (with Zn concentrations up to 992 and 757mgkg-1 in topsoil and subsoil, respectively). We then determined the factors that affect Zn removal, such as pH, initial concentration of DOC solution, and washing frequency. Measurements using a Fourier Transform infrared spectrometer (FT-IR) revealed that carboxyl and amide were the major functional groups in the DOC solution obtained from the liquid fertilizer. Two soil washes using 1,500mgL-1 DOC solution with a of pH 2.0 at 25°C removed about 43% and 21% of the initial Zn from the topsoil and subsoil, respectively. Following this treatment, the pH of the soil declined from 5.4 to 4.1; organic matter content slightly increased from 6.2 to 6.5%; available ammonium (NH4+-N) content increased to 2.4 times the original level; and in the topsoil, the available phosphorus content and the exchangeable potassium content increased by 1.65 and 2.53 times their initial levels, respectively.falseDissolved organic carbonFood-waste compostingLiquid fertilizerSoil washingZinc[SDGs]SDG3[SDGs]SDG12journal article10.1016/j.jhazmat.2015.08.0152-s2.0-84941287076