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- MakaleAçık Erişim2021Investigation of Heavy Metal Pollution in Soil and Plants: The Case of Bayburt Province
Kul, Sinan; Cengiz, İbrahim; Gül, Volkan
Yellow canthron (Hypericum perforatum L.), one of the plants widely used in alternative medicine, is widely grown on highways, but it is unconsciously collected and used for treatment by people without considering the negative effects of environmental pollution. This study was conducted to determine the heavy metal pollution of Hypericum perforatum L., which grows naturally on the roadside in Bayburt province, and the soil where it grows, depending on environmental factors. For this purpose, plant and soil samples were taken from 10 different points along the main connection roads where the Hypericum perforatum L. plant is densely grown and in these samples, using Agilent 7800 ICP-MS brand inductively coupled plasma mass spectrometer, Mg, Cr, Mn, Fe, Co, Ni, The heavy metals of Cu, Zn, Cd and Pb were analyzed. As a result of the analysis of the samples, the highest concentrations were measured for Mg at all sampled points. When the heavy metal content of the plant samples was examined, it was found that other elements except Zn determined at the A9 point on the Bayburt-Erzincan highway were within normal limits, under the influence of the settlements, and when the heavy metal content of the soil samples was examined, it was determined at the A1 and A2 points on the Erzurum-Trabzon highway It has been determined that other heavy metals except Ni are below the limit values. The data obtained show that heavy metal pollution should not be ignored in the province of Bayburt, where there is no industrialization, and that such studies can be used to determine the appropriate natural treatment methods in regions where pollution is increased by repeating certain studies.
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İncele - MakaleAçık Erişim2020Scopus SJRQ1Investigation of ammonia stripping with a hydrodynamic cavitation reactor
Taşdemir, Atila; Cengiz, İbrahim; Yildiz, Ergün; Bayhan, Yalçın Kemal
Ammonia is a commonly used compound in the domestic and industrial fields. If ammonia found in wastewater after use is not treated, even at low concentrations it may cause toxic effects in the receiving environment. In this study, a hydrodynamic cavitation reactor (HDC) was designed with the aim of removing ammonia. The effect of parameters like different cavitation numbers, airflow, temperature and initial concentration on NH3 removal was researched. The potential of hydrodynamic cavitation for removal of volatile gases, like NH3, was assessed with the aid of two film theory mathematical equations. Experimental studies were performed at fixed pH = 11. Under the conditions of 0.12 cavitation number, 25 L/min airflow, 30 °C temperature and 2500 mg/L initial concentration, in 24 h 98.4% NH3 removal efficiency was achieved. With the same experimental conditions without any air, the HDC reactor provided 89.5% NH3 removal at the end of 24 h. The HDC reactor is very effective for the removal of volatile gases from wastewater and it was concluded that even in the absence of aeration, the desired NH3 removal efficiency was provided.
AtıfScopus31WoS27OpenAlex33
İncele - MakaleAçık Erişim2016Scopus SJRQ1Performance investigation of a jet loop membrane bioreactor for the treatment of an actual olive mill wastewater
Değermenci, Nejdet; Cengiz, İbrahim; Yildiz, Ergun; Nuhoglu, Alper
In this study, following the pre-treatment of olive mill wastewater (OMW), its treatment in a jet loop membrane bioreactor (JLMBR) was investigated. Among the pre-treatment options, the configuration composed of physical settling, cartridge filter and ceramic membrane showed the best performance in terms of investigated parameters. For the JLMBR that was fed by pretreated OMW, up to 93 and 87% removal efficiencies were achieved for the chemical oxygen demand (COD) and total phenol, respectively, at volumetric organic load (VOL) of 17.8 kg COD/m3 day. The calculated specific oxygen uptake rate (SOUR) values were in the range 7.7–34.7 g O2/kg MLVSS h. When even hydraulic retention times (HRT) values decreased by a factor of 1:24, system performance in terms of COD and total phenol removal remained almost stable. Decreasing the sludge retention time (SRT) to three days made considerable perturbations for the system performance, increasing the effluent COD and total phenol values in 900 and 80 mg/L, respectively. The JLMBR showed a high overall performance for the treatment of an actual OMW under the evaluated operational conditions.
AtıfScopus33WoS28OpenAlex33İncele