ABSTRACT

Oil activity has generated severe problems of soil contamination. Different techniques have been employed for the removal of pollutants, which are mainly used separately as treatments, but if combined, removal could be improved. The aim of this study was to remove total petroleum hydrocarbons (TPH) from soil artificially contaminated with crude oil using Fenton oxidation followed by biostimulation with nutrients and oil palm bagasse (OPB) used as an amendment. Microcosm units of soil with hydrocarbons were treated with H₂O₂ and Fe citrate at 30% humidity and 25 °C. Samples were taken at 0, 10, and 30 days. Each unit was then adjusted to a C:N:P ratio of 100:10:1, which is considered optimal for remediation of soils contaminated with petroleum hydrocarbons, and mixed with OPB at a ratio of 96:4, 30% humidity, and 25 °C. Samples were taken at 0, 10, 30, and 40 days. Physicochemical parameters, TPH, microbial population, and lipase and dehydrogenase activity were monitored. Slight TPH removal (20.3%), a decrease in enzymatic activities, and a reduction in bacterial population were observed with Fenton oxidation. In the case of the biostimulation-amendment treatment, TPH removal was of 55%, with an increase in enzymatic activities and microbial population.

摘要

石油活动产生了严重的土壤污染问题。污染物的去除采用了不同的技术，主要是单独使用作为处理，但如果结合使用，可以提高去除效果。本研究的目的是使用芬顿氧化法去除被原油人为污染的土壤中的总石油烃 (TPH)，然后用营养物质和油棕甘蔗渣 (OPB) 作为改良剂进行生物刺激。H ₂ O ₂处理含烃土壤的微观单元和柠檬酸铁，湿度为 30%，温度为 25°C。在第 0、10 和 30 天取样。然后将每个单元调整为 100:10:1 的 C:N:P 比，这被认为是修复被石油烃污染的土壤的最佳选择，并与 OPB 以 96:4 的比例、30% 的湿度和25℃。在第 0、10、30 和 40 天取样。监测理化参数、TPH、微生物种群以及脂肪酶和脱氢酶活性。通过芬顿氧化观察到 TPH 轻微去除 (20.3%)、酶活性降低和细菌种群减少。在生物刺激修正处理的情况下，TPH 去除率为 55%，酶活性和微生物种群增加。