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Cho K, Cho M, Kaiyrlinova S, Park J, Park S, Park N, Bae H. Improved regression model for anaerobic ammonium oxidation by repeated and prolonged batch assay under stressful salinity and pH conditions. BIORESOURCE TECHNOLOGY 2023; 390:129896. [PMID: 37863338 DOI: 10.1016/j.biortech.2023.129896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/13/2023] [Accepted: 10/17/2023] [Indexed: 10/22/2023]
Abstract
The aim of this study was to propose repeated and prolonged batch (RPB) assay as a promising specific anammox activity (SAA) methodology assessing the anammox activity under stressed salinity and pH conditions. Response surface analysis (RSA) was used as a regression tool to evaluate statistical significance. The feasibility of RPB was investigated at 0 to 15 g-NaCl/L of salinity and pH 6 to 8 with reflecting the results of preliminary SAA. As a result, conventional SAA was statistically insignificant. In addition, the RSA results obtained from repeated batch did not meet the statistical significance despite ten times iterative reaction. Interestingly, the RPB assay (i.e., applied both repeated and prolonged reaction) was effective to obtain the reliable results. Candidadus Brocadia and Candidadus Jettenia were functional anammox microbiome during RPB. Outcomes of this study suggest that RPB assay can be applied to accurately determine the anammox activity under various stressful conditions.
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Affiliation(s)
- Kyungjin Cho
- Center for Water Cycle Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; Division of Energy & Environment Technology, KIST School, University of Science and Technology (UST), Seoul 02792, Republic of Korea
| | - Minkee Cho
- Department of Civil, Urban, Earth and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea
| | - Shugyla Kaiyrlinova
- Department of Environmental Engineering, University of Seoul, 163, Seoulsiripdae-ro, Dongdaemun-gu, Seoul, Republic of Korea
| | - Jihye Park
- Department of Civil and Environmental Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, Republic of Korea
| | - Suin Park
- Department of Civil and Environmental Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, Republic of Korea
| | - Nohback Park
- Marine and Fisheries Bio-resources Division, Ministry of Oceans and Fisheries, Government Complex, 5-Dong, 94, Dasom 2-Ro, Sejong 30110, Republic of Korea
| | - Hyokwan Bae
- Department of Civil, Urban, Earth and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea; Graduate School of Carbon Neutrality, Ulsan-National Institute of Science and Technology, 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea.
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Zheng S, Li J, Ye C, Xian X, Feng M, Yu X. Microbiological risks increased by ammonia-oxidizing bacteria under global warming: The neglected issue in chloraminated drinking water distribution system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 874:162353. [PMID: 36822432 DOI: 10.1016/j.scitotenv.2023.162353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
A rising outbreak of waterborne diseases caused by global warming requires higher microbial stability in the drinking water distribution system (DWDS). Chloramine disinfection is gaining popularity in this context due to its good persistent stability and fewer disinfection byproducts. However, the microbiological risks may be significantly magnified by ammonia-oxidizing bacteria (AOB) in distribution systems during global warming, which is rarely noticed. Hence, this work mainly focuses on AOB to explore its impact on water quality biosafety in the context of global warming. Research indicates that global warming-induced high temperatures can directly or indirectly promote the growth of AOB, thus leading to nitrification. Further, its metabolites or cellular residues can be used as substrates for the growth of heterotrophic bacteria (e.g., waterborne pathogens). Thus, biofilm may be more persistent in the pipelines due to the presence of AOB. Breakpoint chlorination is usually applied to control such situations. However, switching between this strategy and chloramine disinfection would result in even more severe nitrification and other adverse effects. Based on the elevated microbiological risks in DWDS, the following aspects should be paid attention to in future research: (1) to understand the response of nitrifying bacteria to high temperatures and the possible association between AOB and pathogenic growth, (2) to reveal the mechanisms of AOB-mediated biofilm formation under high-temperature stress, and (3) to develop new technologies to prevent and control the occurrence of nitrification in drinking water distribution system.
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Affiliation(s)
- Shikan Zheng
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Jianguo Li
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Chengsong Ye
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Xuanxuan Xian
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Mingbao Feng
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Xin Yu
- College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
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KHANGEMBAM CHERITADEVI, SINGH SAMARPAL, CHAKRABARTI RINA, SHARMA JAIGOPAL. Study of effect of various temperatures on the abundance of ammonia oxidizing archaea and bacteria. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2023. [DOI: 10.56093/ijans.v88i5.80023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Temperature plays significant role in the oxidation of ammonia in filtration units of recirculating aquaculture system. The impact of temperature on the abundance of ammonia oxidizing archaea and bacteria, and the expression of ammonia oxidizing gene (amoA) at specific temperature was evaluated. The broken earthen pot pieces used as filter bed materials of recirculating system, showing the presence of microorganisms were introduced in glass containers (5 pieces/5l) filled with synthetic wastewater and exposed to four different temperatures of 10, 20, 30 and 40°C for 40 days. The ammonia oxidation rate was minimum at 10°C. In 20, 30 and 40°C treatments, 99% ammonia was reduced on day-18, 8 and 18, respectively compared to the initial day. Fresh ammonium chloride (2 mM) was added twice to maintain the ammonia concentration in all treatments, except 10°C one. Nitrite-N level was < 1 mg/l at 10°C. The level was highest on day-22 at 20° and 40°C and on day-12 at 30°C. The nitrification was 10 days delayed at 20°C and 40°C compared to 30°C treatment. Concentration of nitrate-N was lowest at 10°C. Highest concentration of nitrate-N was observed on day-40 at 20°C and 40°C and day-26 at 30°C. Highest copy number of bacterial amoA was recorded at 30°C (2.59×107) followed by 20°C (4.08×106), 40°C (1.45×106) and 10°C (5.664×103). Archaeal amoA was highest at 30°C (7.47×103) followed by 40°C (2.98×102) and 20°C (46.8) treatments. Hence it may be concluded that 30°C temperature was optimum for the efficient and faster oxidation of ammonia in the present recirculating system.
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Ren Q, Gao J, Wang C. Effects of Heavy Metals on the Performance and Mechanism of Anaerobic Ammonium Oxidation for Treating Wastewater. FRONTIERS IN CHEMICAL ENGINEERING 2022. [DOI: 10.3389/fceng.2022.851822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Persistence of ammonium nitrogen and heavy metals in wastewater still remains a challenge, and many wastewater treatment plants face the challenge of removing nitrogen under heavy metal stresses. There is no preferred method for the biological treatment of wastewater containing nitrogen and heavy metals with the possible exception of the anaerobic ammonium oxidation (anammox), since it has shown promise for removing nitrogen under heavy metal stresses. This article reviews the recent research results of the nitrogen-removal performance and mechanism by the anammox process under heavy metal stresses, mainly discussing the enhancing and inhibition effects of heavy metals on the performance of the Anammox reactor. The influencing mechanism of heavy metals on the microbial community and extracellular polymeric substances is also presented, and examples are given for explanation. The main problems of the present research are pointed out, and it is proposed that unifying the metal ion concentrations of inhibiting or promoting anammox activity is necessary for the development and industrial application of the anammox process. The information of this review can offer a great possibility for achieving desired nitrogen removal in wastewater treatment under heavy metal stresses and with significant energy savings.
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Wang F, Cheng P, Chen N, Kuo YM. Tidal driven nutrient exchange between mangroves and estuary reveals a dynamic source-sink pattern. CHEMOSPHERE 2021; 270:128665. [PMID: 33121808 DOI: 10.1016/j.chemosphere.2020.128665] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/24/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
Nitrogen (N) and phosphorus (P) are vital nutrients regulating mangrove productivity and coastal ecosystems. Understanding of the nutrient cycling and interaction between mangroves and estuary is limited. Here we show tidal-driven nutrient exchange and a dynamic source-sink pattern across the mangrove-estuary interface. Lateral nutrient fluxes were quantified based on hourly concentrations observed at a tidal creek outlet during 2016-2018 and water mass estimated by a hydrodynamic model (FVCOM). The results of nutrient fluxes suggested that mangroves always serve as a source of ammonium (NH4-N) and dissolved reactive P (DRP) to estuary, but as a strong nitrate sink (NO3-N). Dissolved organic components (DON and DOP) shifted from net efflux (source) in spring to net influx (sink) in summer, likely due to the changing balance of P input and biological and physicochemical processes. Mangroves decreased the overall loading of dissolved inorganic N (DIN), dissolved total N (DTN) and total P (TP) to the estuary. Nevertheless, the effluents (aquaculture wastewater and domestic sewage) discharged from the upstream area during ebb tide increased the export of nutrients, especially NH4-N and DRP, offsetting the role of mangrove on mitigating coastal eutrophication.
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Affiliation(s)
- Fenfang Wang
- Key Laboratory of the Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Peng Cheng
- State Key Laboratory of Marine Environment Science, Xiamen University, Xiamen, 361102, China
| | - Nengwang Chen
- Key Laboratory of the Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China; State Key Laboratory of Marine Environment Science, Xiamen University, Xiamen, 361102, China.
| | - Yi-Ming Kuo
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
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Bao Z, Ribera-Guardia A, Spinelli M, Sun D, Pijuan M. The effect of temperature shifts on N 2O and NO emissions from a partial nitritation reactor treating reject wastewater. CHEMOSPHERE 2018; 212:162-169. [PMID: 30144677 DOI: 10.1016/j.chemosphere.2018.08.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/25/2018] [Accepted: 08/18/2018] [Indexed: 06/08/2023]
Abstract
Temperature has a known effect on ammonia oxidizing bacteria (AOB) activities, reducing its ammonia oxidizing rate (AOR) when temperature is lowered. However, little is known concerning its effect on N2O and NO emissions which are produced during ammonia oxidation having a greenhouse effect. To study this, an AOB enriched partial nitrification sequencing batch reactor (PN-SBR) was operated within a two step-wise feed under 5 different temperatures (30-25-20-15-10 °C). A decrease on the specific AOR (sAOR) was detected when decreasing the temperature. N2O emissions were also affected by the temperature but only the ones produced during the first aeration of the cycle, when AOBs shifted from a period of low activity to a period of high activity. N2O emission factors (%) detected during the second aerobic phase were similar among all temperatures tested and lower than the emissions detected during the first aerated phase. The average N2O emission factor was in the range of 0.15-0.70% N2O-N/NH4+-N oxidized in the first aeration phase and 0.14-0.15% N2O-N/NH4+-N-oxidized in the second aeration phase at 10 to 30 °C, respectively. On the other hand, NO emissions were very similar under all temperatures resulting in 0.03-0.06% of NH4+-N oxidized.
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Affiliation(s)
- Zhiyuan Bao
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, China.
| | - Anna Ribera-Guardia
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain.
| | - Matteo Spinelli
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain; Department SIMAU, Faculty of Engineering, Polytechnic University of Marche, Via Brecce Bianche 12, Ancona, Italy.
| | - Dezhi Sun
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, China.
| | - Maite Pijuan
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain.
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Chen Q, Wang Q, Yan H, Chen C, Ma J, Xu Q. Improve the performance of full-scale continuous treatment of municipal wastewater by combining a numerical model and online sensors. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:1658-1667. [PMID: 30500790 DOI: 10.2166/wst.2018.442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Mathematical models based on instant environmental inputs are increasingly applied to optimize the operation of wastewater treatment plants (WWTPs) for improving treatment efficiency. This study established a numerical model consisting of the activated sludge module ASM3 and EAWAG bio-P module, and calibrated the model using data from a full-scale experiment conducted in a WWTP in Nanjing, China. The calibrated model was combined with online sensors for water temperature, chemical oxygen demand, NH+ 4-N and PO3- 4-P to optimize and dynamically adjust the operation of the WWTP. The results showed that, compared to the original default operation mode, the effluent water quality was significantly improved after optimization even without supplementation of external carbon or alkalinity, and the required aeration rate in spring, summer, autumn, and winter was reduced by 15, 41, 33 and 11%, respectively. The study indicated that there was the potential for application of closed-loop automatic control to regulate operating parameters to improve wastewater treatment processes through the integration of data on influent characteristics and environmental conditions from sensors, and results from simulation models.
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Affiliation(s)
- Qiuwen Chen
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210029, China; Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China E-mail:
| | - Qibin Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Hanlu Yan
- Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China E-mail:
| | - Cheng Chen
- Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing 210029, China E-mail:
| | - Jinfeng Ma
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Qiang Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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8
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Li H, Yao H, Zhang D, Zuo L, Ren J, Ma J, Pei J, Xu Y, Yang C. Short- and long-term effects of manganese, zinc and copper ions on nitrogen removal in nitritation-anammox process. CHEMOSPHERE 2018; 193:479-488. [PMID: 29156333 DOI: 10.1016/j.chemosphere.2017.11.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/31/2017] [Accepted: 11/01/2017] [Indexed: 06/07/2023]
Abstract
This study provided a deep insight into the impacts of trace elements (Mn2+, Zn2+ and Cu2+) on nitritation-anammox process. For short-term exposure, all the three elements could improve the nitrogen removal rate (NRR) and the optimal concentrations were 2.0 mg/L, 2.0 mg/L and 0.5 mg/L for Mn2+, Zn2+ and Cu2+, respectively. Accordingly, the NRRs were enhanced 54.62%, 45.93% and 44.09%. The long-term experiments were carried out in lab-scale sequencing batch reactors. The surprising results showed that only Mn2+ addition could enhance the long-term nitritation-anammox process, and the NRR increased from 0.35 ± 0.01 kg N/m3/d (control, no extra trace element addition) to 0.49 ± 0.03 kg N/m3/d. Vice versa, the amendment of Zn2+ reduced the NRR to 0.28 ± 0.02 kg N/m3/d, and Cu2+ had no significant effect on the NRR (0.36 ± 0.01 kg N/m3/d). From the analysis of microbial community structure, it was explained by the increasing abundance of anaerobic ammonium oxidizing bacteria (AnAOB) only in Mn2+ treatment, whereas Zn2+ predominantly promoted ammonium oxidizing bacteria (AOB). Additionally, the majority of Mn2+ was identified inside AnAOB cells, and Zn2+ and Cu2+ were mainly located in AOB. Our results indicated the synergistic effects of trace elements on nitritation-anammox, both short-term encouraging activities of AnAOB and long-term altering microbial community structure. This work implies the importance of trace elements addition in nitritation-anammox process.
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Affiliation(s)
- Huayu Li
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China
| | - Hong Yao
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China.
| | - Dayi Zhang
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 2YQ, UK
| | - Lushen Zuo
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China
| | - Jia Ren
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China
| | - Jinyuan Ma
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China
| | - Jin Pei
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China
| | - Yaru Xu
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China
| | - Chengyong Yang
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing, 100044, People's Republic of China
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Detoxification of Pesticide-Containing Wastewater with FeIII, Activated Carbon and Fenton Reagent and Its Control Using Three Standardized Bacterial Inhibition Tests. WATER 2017. [DOI: 10.3390/w9120969] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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10
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Performance improvement of raw water pretreatment process with pre-inoculation biofilm: feasibility and limiting factors. Biodegradation 2016; 28:111-123. [DOI: 10.1007/s10532-016-9781-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 11/28/2016] [Indexed: 10/20/2022]
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Wang Z, Gao M, Wei J, Ma K, Zhang J, Yang Y, Yu S. Extracellular polymeric substances, microbial activity and microbial community of biofilm and suspended sludge at different divalent cadmium concentrations. BIORESOURCE TECHNOLOGY 2016; 205:213-221. [PMID: 26829529 DOI: 10.1016/j.biortech.2016.01.067] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 01/06/2016] [Accepted: 01/08/2016] [Indexed: 06/05/2023]
Abstract
The differences between biofilm and suspended sludge (S-sludge) in extracellular polymeric substances (EPS), microbial activity, and microbial community in an anoxic-aerobic sequencing batch biofilm reactor (SBBR) at different concentrations of divalent cadmium (Cd(II)) were investigated. As the increase of Cd(II) concentration from 0 to 50mgL(-1), the specific ammonium oxidation rate (SAOR), specific nitrite oxidation rate (SNOR), and specific nitrate reduction rate (SNRR) of biofilm decreased from 4.85, 5.22 and 45mgNg(-1) VSSh(-1) to 1.54, 2.38 and 26mgNg(-1)VSSh(-1), respectively, and the SAOR, SNOR and SNRR of S-sludge decreased from 4.80, 5.02 and 34mgNg(-1)VSSh(-1) to 1.46, 2.20 and 17mgNg(-1)VSSh(-1), respectively. Biofilm had higher protein (PN) content in EPS than S-sludge. Contrast to S-sludge, biofilm could provide Nitrobacter vulgaris, beta proteobacterium INBAF015, and Pseudoxanthomonas mexicana with the favorable conditions of growth and reproduction.
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Affiliation(s)
- Zichao Wang
- College of Environment and Chemical Engineering, Dalian University, Dalian, China; Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, China.
| | - Mengchun Gao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
| | - Junfeng Wei
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Kedong Ma
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Jing Zhang
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Yusuo Yang
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Shuping Yu
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
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12
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Bae H, Chung YC, Yang H, Lee C, Aryapratama R, Yoo YJ, Lee S. Assessment of bacterial community structure in nitrifying biofilm under inorganic carbon-sufficient and -limited conditions. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2015; 50:201-212. [PMID: 25560266 DOI: 10.1080/10934529.2014.975550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, nitrification and changes in the composition of the total bacterial community under inorganic carbon (IC)-limited conditions, in a nitrifying moving bed biofilm reactor, was investigated. A culture-independent analysis of cloning and sequencing based on the 16S rRNA gene was applied to quantify the bacterial diversity and to determine bacterial taxonomic assignment. IC concentrations had significant effects on the stability of ammonia-oxidation as indicated by the reduction of the nitrogen conversion rate with high NH4(+)-N loadings. The predominance of Nitrosomonas europaea was maintained in spite of changes in the IC concentration. In contrast, heterotrophic bacterial species contributed to a high bacterial diversity, and to a dynamic shift in the bacterial community structure, under IC-limited conditions. In this study, individual functions of heterotrophic bacteria were estimated based on taxonomic information. Possible key roles of coexisting heterotrophic bacteria are the assimilation of organic compounds of extracellular polymeric substances produced by nitrifiers, and biofilm formation by providing a filamentous structure and aggregation properties.
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Affiliation(s)
- Hyokwan Bae
- a Center for Water Resource Cycle Research, Korea Institute of Science and Technology (KIST) , Seoul , Republic of Korea
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13
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Mannucci A, Munz G, Mori G, Makinia J, Lubello C, Oleszkiewicz JA. Modeling bioaugmentation with nitrifiers in membrane bioreactors. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 71:15-21. [PMID: 25607664 DOI: 10.2166/wst.2014.456] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Bioaugmentation with nitrifiers was studied using two pilot-scale membrane bioreactors, with the purpose of assessing the suitability of state-of-the-art activated sludge models (ASMs) in predicting the efficiency of bioaugmentation as a function of operating conditions. It was demonstrated that the temperature difference between seeding and seeded reactors (ΔT) affects bioaugmentation efficiency. Experimental data were accurately predicted when ΔT was within a range of up to 10 °C at the higher range, and when the temperature was significantly lower in the seeded reactor compared to the seeding one, standard ASMs overestimated the efficiency of bioaugmentation. A modified ASM, capable of accurately representing the behavior of seeded nitrifying biomass in the presence of high ΔT, would require the inclusion of the effect of temperature time gradients on nitrifiers. A simple linear correlation between ΔT and the Arrhenius coefficient was proposed as a preliminary step.
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Affiliation(s)
- Alberto Mannucci
- Department of Civil and Environmental Engineering, University of Florence, Via S. Marta n. 3, Florence 50139, Italy E-mail:
| | - Giulio Munz
- Department of Civil and Environmental Engineering, University of Florence, Via S. Marta n. 3, Florence 50139, Italy E-mail: ; Department of Civil Engineering, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada
| | - Gualtiero Mori
- CER2CO, Consorzio Cuoiodepur Spa, San Romano - San Miniato, Pisa, Italy
| | - Jacek Makinia
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, ul. Narutowicza 11/12, Gdansk 80-233, Poland
| | - Claudio Lubello
- Department of Civil and Environmental Engineering, University of Florence, Via S. Marta n. 3, Florence 50139, Italy E-mail:
| | - Jan A Oleszkiewicz
- Department of Civil Engineering, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada
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14
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Analyzing the revolution of anaerobic ammonium oxidation (anammox) performance and sludge characteristics under zinc inhibition. Appl Microbiol Biotechnol 2014; 99:3221-32. [DOI: 10.1007/s00253-014-6205-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 10/28/2014] [Accepted: 10/30/2014] [Indexed: 10/24/2022]
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15
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Yang GF, Feng LJ, Yang Q, Zhu L, Xu J, Xu XY. Startup pattern and performance enhancement of pilot-scale biofilm process for raw water pretreatment. BIORESOURCE TECHNOLOGY 2014; 172:22-31. [PMID: 25233473 DOI: 10.1016/j.biortech.2014.08.116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/24/2014] [Accepted: 08/26/2014] [Indexed: 06/03/2023]
Abstract
The quality of raw water is getting worse in developing countries because of the inadequate treatment of municipal sewage, industrial wastewater and agricultural runoff. Aiming at the biofilm enrichment and pollutant removal, two pilot-scale biofilm reactors were built with different biological carriers. Results showed that compared with the blank carrier, the biofilm was easily enriched on the biofilm precoated carrier and less nitrite accumulation occurred. The removal efficiencies of NH4(+)-N, DOC and UV254 increased under the aeration condition, and a optimum DO level for the adequate nitrification was 1.0-2.6mgL(-1) with the suitable temperature range of 21-22°C. Study on the trihalomethane prediction model indicated that the presentence of algae increased the risk of disinfection by-products production, which could be effectively controlled via manual algae removing and light shading. In this study, the performance of biofilm pretreatment process could be enhanced under the optimized condition of DO level and biofilm carrier.
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Affiliation(s)
- Guang-Feng Yang
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Li-Juan Feng
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Department of Environmental Engineering, Zhejiang Ocean University, No. 1 Haida South Road, Zhoushan 316022, China
| | - Qi Yang
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Liang Zhu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China.
| | - Jian Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Xiang-Yang Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China
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16
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Kardas M, Gozen AG, Severcan F. FTIR spectroscopy offers hints towards widespread molecular changes in cobalt-acclimated freshwater bacteria. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 155:15-23. [PMID: 24964200 DOI: 10.1016/j.aquatox.2014.05.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 05/22/2014] [Accepted: 05/22/2014] [Indexed: 06/03/2023]
Abstract
High concentrations of heavy metals can be toxic for bacteria. However, after prolonged exposure, bacteria can become acclimated and begin to be able to grow in the presence of heavy metals. Acclimation can involve alterations of metabolism and molecular structures. Our aim was to examine these alterations in cobalt-acclimated bacteria via attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy on viable samples. Bacillus sp. and Pseudomonas sp. isolated from a temperate shallow lake and a well-established strain of E. coli were investigated. Our results revealed consistent, wide-spread changes in cell membrane and cell wall dynamics of Bacillus sp. and E. coli, including a decrease in peptidoglycan content of Bacillus sp. and increased lipid ordering of the membrane in both bacteria. Furthermore, a decrease in RNA and protein concentrations of Bacillus sp. was measured. All three bacteria studied showed a decrease in conformational freedom of proteins following cobalt acclimation. Interestingly, both Bacillus sp. and E. coli showed slight but significant alterations in their DNA conformations which might imply a methylation-mediated memory formation leading to epigenetic modulation for cobalt adaptation.
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Affiliation(s)
- Mehmet Kardas
- Middle East Technical University, Biological Sciences, Microbial Ecology Laboratory and Biophysics Laboratory, Ankara 06800, Turkey
| | - Ayse Gul Gozen
- Middle East Technical University, Biological Sciences, Microbial Ecology Laboratory and Biophysics Laboratory, Ankara 06800, Turkey.
| | - Feride Severcan
- Middle East Technical University, Biological Sciences, Microbial Ecology Laboratory and Biophysics Laboratory, Ankara 06800, Turkey
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17
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Achieving enhanced nitrification in communities of nitrifying bacteria in full-scale wastewater treatment plants via optimal temperature and pH. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.06.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Daverey A, Chen YC, Sung S, Lin JG. Effect of zinc on anammox activity and performance of simultaneous partial nitrification, anammox and denitrification (SNAD) process. BIORESOURCE TECHNOLOGY 2014; 165:105-110. [PMID: 24815312 DOI: 10.1016/j.biortech.2014.04.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/08/2014] [Accepted: 04/09/2014] [Indexed: 06/03/2023]
Abstract
In the present study, short-term effects of zinc on anammox activities and long-term effect of zinc on the performance of simultaneous partial nitrification, anammox and denitrification (SNAD) process were evaluated. The anammox activity decreased with increasing zinc concentration and exposure time in short-term tests. The IC50 value of zinc was found to be 6.9mg/L. However, the presence of zinc (<10mg/L) in wastewater stimulated the microbial activities and nitrogen removal performance of SNAD process in sequencing batch biofilm reactor (SBBR). At first, inhibition of SNAD process was observed when influent zinc concentration increased to 20mg/L. The system recovered immediately, suggesting the acclimatization of microbial communities of SNAD process. The results showed that SBBR was well acclimatized under high zinc concentration (50-100mg/L) achieving 98% NH4(+)-N, 96% TN and 87% COD removal efficiencies.
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Affiliation(s)
- Achlesh Daverey
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yi-Chian Chen
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Shihwu Sung
- College of Agriculture, Forestry, and Natural Resource Management, University of Hawaii at Hilo, 200 W. Kawili ST., Hilo, HI 96720, USA
| | - Jih-Gaw Lin
- Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
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19
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Bu F, Xu X. Planted floating bed performance in treatment of eutrophic river water. ENVIRONMENTAL MONITORING AND ASSESSMENT 2013; 185:9651-9662. [PMID: 23737127 DOI: 10.1007/s10661-013-3280-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 05/21/2013] [Indexed: 06/02/2023]
Abstract
The objective of the study was to treat eutrophic river water using floating beds and to identify ideal plant species for design of floating beds. Four parallel pilot-scale units were established and vegetated with Canna indica (U1), Accords calamus (U2), Cyperus alternifolius (U3), and Vetiveria zizanioides (U4), respectively, to treat eutrophic river water. The floating bed was made of polyethylene foam, and plants were vegetated on it. Results suggest that the floating bed is a viable alternative for treating eutrophic river water, especially for inhibiting algae growth. When the influent chemical oxygen demand (COD) varied from 6.53 to 18.45 mg/L, total nitrogen (TN) from 6.82 to 12.25 mg/L, total phosphorus (TP) from 0.65 to 1.64 mg/L, and Chla from 6.22 to 66.46 g/m(3), the removal of COD, TN, TP, and Chla was 15.3%-38.4%, 25.4%-48.4%, 16.1%-42.1%, and 29.9 %-88.1%, respectively. Ranked by removal performance, U1 was best, followed by U2, U3, and U4. In the floating bed, more than 60% TN and TP were removed by sedimentation; plant uptake was quantitatively of low importance with an average removal of 20.2% of TN and 29.4% of TP removed. The loss of TN (TP) was of the least importance. Compared with the other three, U1 exhibited better dissolved oxygen (DO) gradient distributions, higher DO levels, higher hydraulic efficiency, and a higher percentage of nutrient removal attributable to plant uptake; in addition, plant development and the volume of nutrient storage in the C. indica tissues outperformed the other three species. C. indica thus could be selected when designing floating beds for the Three Gorges Reservoir region of P. R. China.
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Affiliation(s)
- Faping Bu
- Environmental Protection Bureau of Fengjie County, Chongqing, 404600, People's Republic of China,
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20
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Kim YM. Acclimatization of communities of ammonia oxidizing bacteria to seasonal changes in optimal conditions in a coke wastewater treatment plant. BIORESOURCE TECHNOLOGY 2013; 147:627-631. [PMID: 24001689 DOI: 10.1016/j.biortech.2013.08.062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Revised: 08/06/2013] [Accepted: 08/08/2013] [Indexed: 06/02/2023]
Abstract
The goal of this study was to investigate the correlation between optimal conditions of ammonia oxidation rates (AORs) and communities of ammonia oxidizing bacteria (AOB) adapting to seasonal changes in a full-scale wastewater treatment plant (WWTP). The optimal temperature and pH of specific AORs reflected seasonal variation patterns, showing the lowest values during the cold season, while the highest values in the warm season. Throughout the study period, Nitrosomonas europaea/eutropha and Nitrosomonas nitrosa remained the dominant AOB, indicating resistance to the influences of a changing environment. These results show that the optimal conditions for AOR can be adjusted to accommodate changing environmental conditions, relying on the acclimatization of a stable AOB community to given conditions, without any visible shift in the AOB community.
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Affiliation(s)
- Young Mo Kim
- Department of Civil Engineering, Dong-A University, Busan 604-714, Republic of Korea.
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21
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Zhang S, Wang Y, He W, Wu M, Xing M, Yang J, Gao N, Yin D. Responses of biofilm characteristics to variations in temperature and NH4(+)-N loading in a moving-bed biofilm reactor treating micro-polluted raw water. BIORESOURCE TECHNOLOGY 2013; 131:365-373. [PMID: 23376201 DOI: 10.1016/j.biortech.2012.12.172] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 12/25/2012] [Accepted: 12/26/2012] [Indexed: 06/01/2023]
Abstract
A pilot-scale moving-bed biofilm reactor (MBBR) for biological treatment of micro-polluted raw water was operated over 400days to investigate the responses of biofilm characteristics and nitrification performance to variations in temperature and NH4(+)-N loading. The mean removal efficiency of NH4(+)-N in the MBBR reached 71.4±26.9%, and batch experiments were performed to study nitrification kinetics for better process understanding. Seven physical-chemical parameters, including volatile solids (VS), polysaccharides (PS) and phospholipids (PL) increased firstly, and then rapidly decreased with increasing temperature and NH4(+)-N loading, and properly characterized the attached biomass during biofilm development and detachment in the MBBR. The biofilm compositions were described by six ratios, e.g., PS/VS and PL/VS ratios showed different variation trends, indicating different responses of PS and PL to the changes in temperature and NH4(+)-N loading. Furthermore, fluorescent in situ hybridization (FISH) analysis revealed that increased NH4(+)-N loadings caused an enrichment of the nitrifying biofilm.
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Affiliation(s)
- Shuangfu Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Siping Road, Shanghai 200092, PR China
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Munz G, Szoke N, Oleszkiewicz JA. Effect of ammonia oxidizing bacteria (AOB) kinetics on bioaugmentation. BIORESOURCE TECHNOLOGY 2012; 125:88-96. [PMID: 23026318 DOI: 10.1016/j.biortech.2012.08.117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 08/20/2012] [Accepted: 08/23/2012] [Indexed: 06/01/2023]
Abstract
Bioaugmentation with ammonium oxidizing bacteria (AOB) was tested for 620d. A seeding reactor (R1), two seeded reactors (R2 at 21°C; R3 at 15°C) and an unseeded-control reactor (R4 at 21°C) were operated in parallel (2.4<SRT<4d). The effect of seeding on nitritation efficiency was found to be dependent on solids retention time (SRT), influent ammonia concentration to the seeded reactors and the temperature difference between the seeding and seeded reactors. Mathematical modeling and batch tests were used to characterize the AOB selected in R1 and the effect of the seeding on AOB kinetics in R2 and R3. The AOB kinetics of R2 and R3 reflected the kinetics of R1 but differed from those in R4. This behavior affected the efficiency of bioaugmentation to varying degrees in the reactors and required a specific approach to represent the experimental results through mathematical modeling.
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Affiliation(s)
- Giulio Munz
- Department of Civil Engineering, University of Manitoba, Canada.
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Ciobanu CS, Iconaru SL, Le Coustumer P, Constantin LV, Predoi D. Antibacterial activity of silver-doped hydroxyapatite nanoparticles against gram-positive and gram-negative bacteria. NANOSCALE RESEARCH LETTERS 2012; 7:324. [PMID: 22721352 PMCID: PMC3422172 DOI: 10.1186/1556-276x-7-324] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 05/26/2012] [Indexed: 05/10/2023]
Abstract
Ag-doped nanocrystalline hydroxyapatite nanoparticles (Ag:HAp-NPs) (Ca10-xAgx(PO4)6(OH)2, xAg = 0.05, 0.2, and 0.3) with antibacterial properties are of great interest in the development of new products. Coprecipitation method is a promising route for obtaining nanocrystalline Ag:HAp with antibacterial properties. X-ray diffraction identified HAp as an unique crystalline phase in each sample. The calculated lattice constants of a = b = 9.435 Å, c = 6.876 Å for xAg = 0.05, a = b = 9.443 Å, c = 6.875 Å for xAg = 0.2, and a = b = 9.445 Å, c = 6.877 Å for xAg = 0.3 are in good agreement with the standard of a = b = 9.418 Å, c = 6.884 Å (space group P63/m). The Fourier transform infrared and Raman spectra of the sintered HAp show the absorption bands characteristic to hydroxyapatite. The Ag:HAp nanoparticles are evaluated for their antibacterial activity against Staphylococcus aureus, Klebsiella pneumoniae, Providencia stuartii, Citrobacter freundii and Serratia marcescens. The results showed that the antibacterial activity of these materials, regardless of the sample types, was greatest against S. aureus, K. pneumoniae, P. stuartii, and C. freundii. The results of qualitative antibacterial tests revealed that the tested Ag:HAp-NPs had an important inhibitory activity on P. stuartii and C. freundii. The absorbance values measured at 490 nm of the P. stuartii and C. freundii in the presence of Ag:HAp-NPs decreased compared with those of organic solvent used (DMSO) for all the samples (xAg = 0.05, 0.2, and 0.3). Antibacterial activity increased with the increase of xAg in the samples. The Ag:HAp-NP concentration had little influence on the bacterial growth (P. stuartii).
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Affiliation(s)
- Carmen Steluta Ciobanu
- National Institute of Materials Physics, 105 bis Atomistilor, P.O. Box MG 07, Magurele, Bucuresti, 077125, Romania
| | - Simona Liliana Iconaru
- National Institute of Materials Physics, 105 bis Atomistilor, P.O. Box MG 07, Magurele, Bucuresti, 077125, Romania
| | - Phillippe Le Coustumer
- University of Bordeaux, EA 4592 Géoressources & Environnement, EGID, 1 allée F. Daguin 18, Pessac Cedex, 33607, France
| | - Liliana Violeta Constantin
- Faculty of Physics, University of Bucharest, 405 Atomistilor, CP MG - 1, Magurele, Bucuresti, 077125, Romania
| | - Daniela Predoi
- National Institute of Materials Physics, 105 bis Atomistilor, P.O. Box MG 07, Magurele, Bucuresti, 077125, Romania
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