http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Ekpeghere, Kalu I. (검색결과 21 건)
- 무료
- 기관 내 무료
- 유료
-
-
Ekpeghere, Kalu Ibe,Lee, Ji-Woo,Kim, Hee-Young,Shin, Sun-Kyoung,Oh, Jeong-Eun Elsevier 2017 CHEMOSPHERE - Vol.168 No.-
<P><B>Abstract</B></P> <P>This study investigated 24 pharmaceuticals compounds belonging to the classes of analgesics, stimulants, anti-seizures, non-steroidal anti-inflammatory drugs (NSAIDs), and antibiotics in the sludge of 12 municipal sewage treatment plants (S-sludge) and 4 livestock wastewater treatment plants (L-sludge) located across Korea. Over 70% of the target compounds were detected in at least one sample of S-sludge and L-sludge. The total concentration of the target pharmaceutical compounds detected in S-sludge was 2.622–422.8 mg kg<SUP>−1</SUP>and the most dominant compound was acetylsalicylic acid (ASA: 0.374–367.0 mg kg<SUP>−1</SUP>) whereas in L-sludge, the total concentration was 43.87–156.8 mg kg<SUP>−1</SUP>and the most abundant compound was oxytetracycline (OTC: 34.54–86.39 mg kg<SUP>−1</SUP>). Cluster analysis revealed two distinct groups: group A, which were S-sludge samples including ASA, carbamazepine (CBM), and others, and group B were L-sludge samples, dominated by antibiotics (CTC, OTC, LIN). The total daily load amount of the target pharmaceuticals in S-sludge was 0.010–268.9 kg day<SUP>−1</SUP> while the L-sludge was 0.021–0.529 kg day<SUP>−1</SUP>. The estimated amounts of the target pharmaceutical discharged from S-sludge and L-sludge into the Korean environment were 150.2 ± 47.94 ton yr<SUP>−1</SUP> and 15.05 ± 5.671 ton yr<SUP>−1</SUP> respectively, but the discharged amount of antibiotics from S-sludge (6.945 ton yr<SUP>−1</SUP>) was lower than that from L-sludge (9.234 ton yr<SUP>−1</SUP>).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pharmaceuticals in sewage and livestock sludge were studied. </LI> <LI> Acetylsalicylic acid was the most abundant pharmacuetical in the sewage sludge. </LI> <LI> Over 80% of the pharmacueticals observed in the livestock sludge were antibiotics. </LI> <LI> Estimated annual discharge amount of antibiotics from livestock sludge was 25% greater than sewage sludge. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
-
Ekpeghere, Kalu Ibe,Sim, Won-Jin,Lee, Heon-Jun,Oh, Jeong-Eun Elsevier 2018 Science of the Total Environment Vol.640 No.-
<P><B>Abstract</B></P> <P>The concentrations and fates of carbamazepine and metabolites (CBMs), nicotine and metabolites (NCTs), estrogenic compounds and metabolites (Es) in various water samples were investigated. Different concentrations were found for water from different sources. The concentrations of these pharmaceuticals and personal care products and their metabolites in human waste treatment plant (HTP) influents (0.08–173 μg L<SUP>−1</SUP>) were higher than in the other influent samples and the lowest levels were observed in hospital wastewater treatment plant influents (0.03–7.33 μg L<SUP>−1</SUP>). The concentrations were higher in HTP effluents (0.01–11.2 μg L<SUP>−1</SUP>) than in the other effluent samples and lowest in sewage treatment plant effluents (0.003–1.26 μg L<SUP>−1</SUP>). The NCTs were the most frequently detected pharmaceuticals and personal care products (concentration range 0.05–89.6 μg L<SUP>−1</SUP>) in the wastewater treatment plant influents, but the CBMs were found at the highest concentrations (0.003–6.88 μg L<SUP>−1</SUP>). 10, 11-Dihydro-10, 11-dihydroxycarbamazepine was the most abundant of the CBMs in the wastewater treatment plants and water samples. <I>Trans</I>-3′-hydroxycotinine was dominant in the HTP and hospital wastewater treatment plant influents, whereas the parent NCT was dominant in the sewage treatment plant influents and in all the effluent and other water samples. Estriol was the dominant estrogenic compound in the HTP and hospital wastewater treatment plant influents. Estriol and estrone were found in many of the HTP influents, but estrone was dominant in the effluent and other water samples. The total removal efficiencies for the CBMs, NCTs, and estrogenic compounds for the treatment plants were −101% to 56%, 2.9%–99%, and >98%, respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Higher concentrations of PPCPs and their metabolites were observed in HTPs than other WWTPs. </LI> <LI> The NCTs level was highest WWTPs in influents and CBMs were highest in effluents and water samples. </LI> <LI> CBM and NCT metabolite contributions were higher than parent compounds in most of the samples. </LI> <LI> E1 contribution was higher than other Es in effluents and water samples due to lower removal rate. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
-
국내토착 유용미생물(Beneficial Microorganisms; BM)을 이용한 음식물쓰레기의 효율적 자원화
김인수,장재수,염현교,이하나,초 양,Kalu I. Ekpeghere,고성철 한국폐기물자원순환학회 2014 한국폐기물자원순환학회지 Vol.31 No.8
Recycling of food wastes was tried based on fermenting and composting food wastes using a microbial consortium. Manufactured compost (using 11.3% food waste) turned out to be effective in increasing soil fertility and crop growth (radish; Raphanus sativus). More specifically, the treatment of the composted food wastes enabled a stimulated growth of radish leaves by 80% and an increased uptake of δ15NAIR by 250% compared with a commercial organic compost. Moreover, the compost derived from the wastes appeared to allow a sustainable management of nitrogen fertilizer compared with the chemical fertilizer, minimizing nitrogen pollution. The microbial community analysis showed significant difference in the microbial community pattern in soil treated with the composted food wastes relative to soil treated with a commercial organic fertilizer or a chemical fertilizer. The results may indicate that the wastes processed by the consortium could result in an efficient recycling of the nuisance materials such as food wastes and other organic solid wastes.
-
Koh, Sung-Cheol,Ekpeghere, Kalu I. Korean Society for Engineering Education 2010 공학교육연구 Vol.13 No.2
The objective of this study was to evaluate Environmental microbiology (EM) as a basic course for the environmental engineering program of Korea Maritime University which has been accredited by Accreditation Board for Engineering Education of Korea (ABEEK). Evaluation result of the lecture objectives was more than the average (3.5/5.0). The overall score for learning achievement assessment was more than average level of learning achievement (3.4/5.0). Interestingly, engineering design implementation regarding a specific topic as an extensive learning process has proven to be more effective (3.5/5.0). Some of effective class improvement strategies suggested were to encourage students to participate in the class with self-motivation and accountability: preview and review of the lecture, team presentation in English-speaking settings, and submitting project report written in English. In the future class of EM, test and evaluation of application capability of EM and environmental biotechnology (EB) theories to engineering problem solving should be emphasized.
-
고성철,Kelvin I. ekpeghere 한국공학교육학회 2010 공학교육연구 Vol.13 No.2
The objective of this study was to evaluate Environmental microbiology (EM) as a basic course for the environmental engineering program of Korea Maritime University which has been accredited by Accreditation Board for Engineering Education of Korea (ABEEK). Evaluation result of the lecture objectives was more than the average (3.5/5.0). The overallscore for learning achievement assessment was more than average level of learning achievement (3.4/5.0). Interestingly, engineering design implementation regarding a specific topic as an extensive learning process has proven to be more effective (3.5/5.0). Some of effective class improvement strategies suggested were to encourage students to participate inthe class with self-motivation and accountability: preview and review of the lecture, team presentation in English-speakingsettings, and submitting project report written in English. In the future class of EM, test and evaluation of application capability of EM and environmental biotechnology (EB) theories to engineering problem solving should be emphasized.
-
Gu, Seo-Yeon,Ekpeghere, Kalu Ibe,Kim, Hee-Young,Lee, In-Seok,Kim, Da-Hye,Choo, Gyojin,Oh, Jeong-Eun Elsevier 2017 The Science of the total environment Vol.601 No.-
<P><B>Abstract</B></P> <P>Brominated flame retardants (BFRs), including polybrominated diphenyl ethers (PBDEs), tetrabromobisphenol A (TBBPA), and hexabromocyclododecanes (HBCDs), were investigated in bivalve (i.e., oyster (<I>Crassostrea gigas</I>) and mussel (<I>Mytilus coruscus</I>)), sediment, and seawater samples collected from aquaculture areas in South Korea to identify their occurrence, sources, and bioaccumulation. Among the studied chemicals, HBCDs predominated in bivalves and sediment, with concentrations of ND–67.52ng/g lipid weight and 3.47–168ng/g dry weight, respectively, while TBBPA was the highest contributor in seawater (ND–2.79ng/L). Compared with a non-aquaculture area, HBCD and PBDE concentrations were significantly higher in all matrices in the aquaculture area (Mann–Whitney <I>U</I> test, <I>p</I> <0.05), suggesting that sources may be located near or associated with the aquaculture areas, such as industrial complexes and expanded polystyrene buoys. Finally, the bioconcentration factor (BCF) and biota–sediment accumulation factor (BSAF) were estimated. Among the studied BFRs, BDE-47 (BCF: 1.70×10<SUP>6</SUP> L/kg; BSAF: 20.92) and α-HBCD (BCF: 1.05×10<SUP>6</SUP> L/kg; BSAF: 0.13) showed the highest accumulation potentials in bivalves.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This is the first field-based study to measure representative BFRs in biotic and abiotic matrices of aquaculture area. </LI> <LI> HBCDs were dominated in bivalves and sediment, meanwhile TBBPA was dominant in seawater. </LI> <LI> HBCDs were significantly higher in all matrices from aquaculture area than those from non-aquaculture area. </LI> <LI> Among the BFRs, BDE-47 and α-HBCD showed the highest BCFs and BSAFs in bivalves. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
-
Kim, In-Soo,Ekpeghere, Kaluibe,Ha, Shin-Young,Kim, Soo-Hyeon,Kim, Bong-Soo,Song, Bongkeun,Chun, Jongsik,Chang, Jae-Soo,Kim, Hong-Gi,Koh, Sung-Cheol Marcel Dekker 2013 Journal of environmental science and health. Part Vol.48 No.13
<P>A novel microbial consortium (BM-S-1) enriched from natural soils was successfully used to treat tannery wastewater from leather manufacturing industries in Korea on a pilot scale. The objective of this study was to determine whether augmentation with a novel microbial consortium BM-S-1could successfully treat the recalcitrant wastewater without chemical pre-treatment in a tannery wastewater treatment system. Chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) were monitored for water quality. The microbial population dynamics were analyzed using pyrosequencing, and denitrifying bacteria were quantified using real-time PCR (RT-PCR). The removal efficiencies for COD, TN and TP were greater than 91%, 79%, and 90%, respectively. The dominant phyla in the buffering tank (B), primary aeration (PA), secondary aeration (SA) and sludge digestion tank (SD) were Proteobacteria, Firmicutes, Bacteroidetes, Planctomycetes and Deinococcus-Thermus. Cluster analysis based on the UniFrac distance of the species in the different stages showed that the PA is similar to the SA, whereas the B is similar to the SD. qPCR of the nosZ genes showed the highest abundance of denitrifiers in B, which was increased 734-fold compared to the influent (I). It was hypothesized that anaerobic denitrifiers and the diverse microbial community may play important roles in the biological treatment of tannery wastewater. This technology may also contribute to the full-scale treatment of industrial wastewater containing food processing wastewater and marine sediment with high organic content.</P>
-
Kim, Ki Yong,Ekpeghere, Kalu Ibe,Jeong, Hee-Jin,Oh, Jeong-Eun Elsevier 2017 Environmental pollution Vol.227 No.-
<P><B>Abstract</B></P> <P>Seasonal variations in the concentrations of eight ultraviolet (UV) filters and 22 illicit drugs including their metabolites in the Korean aquatic environment were investigated. Seawater samples from three beaches, water samples from two rivers, and influents and effluents from three wastewater treatment plants were analyzed. The UV filter concentrations in the seawater, river water, and effluent samples were 39.4–296, 35.4–117, and 6.84–51.1 ng L<SUP>-1</SUP>, respectively. The total UV filter concentrations in the seawater samples were 1.9–4.4 times higher at the peak of the holiday season than outside the peak holiday season. An environmental risk assessment showed that ethylhexyl methoxy cinnamate (EHMC) could cause adverse effects on aquatic organisms in the seawater at the three beaches during the holiday period. Seven of the 22 target illicit drugs including their metabolites were detected in the wastewater influent samples, and the total illicit drug concentrations in the influent samples were 0.08–65.4 ng L<SUP>-1</SUP>. The estimated daily consumption rates for <I>cis</I>-tramadol (<I>Cis</I>-TRM), methamphetamine (MTP), meperidine (MEP), and codeine (COD) were 25.7–118.4, 13.8–36.1, 1.36–12.6, and 1.75–8.64 mg d<SUP>-1</SUP> (1000 people)<SUP>−1</SUP>, respectively. In popular vacation area, the illicit drug consumption rates (<I>Cis</I>-TRM, MTP and MEP) were 1.6–2.6 times higher at the peak of the summer holiday season than at the beginning of the summer.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Eight ultraviolet (UV) filters and 22 illicit drugs were studied. </LI> <LI> Total UV filter concentrations in seawater were 1.9–4.4 times higher at the peak of summer vacation. </LI> <LI> Ethylhexyl methoxy cinnamate (EHMC) could cause adverse effects on aquatic organisms during this period. </LI> <LI> In holiday areas, illicit drug consumption rates were 1.6–2.6 times higher at the peak of the holiday period. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
