scholarly journals Oligotrophic bacterium Hymenobacter latericoloratus CGMCC 16346 degrades the neonicotinoid imidacloprid in surface water

2019 ◽  
Author(s):  
Leilei Guo ◽  
Zhiling Dai ◽  
Jingjing Guo ◽  
Wenlong Yang ◽  
Feng Ge ◽  
...  
Keyword(s):  
Surface Water ◽  
Pure Culture ◽  
Defense Mechanisms ◽  
Aquatic Invertebrates ◽  
Water Environment ◽  
Resting Cells ◽  
Degrading Bacterium ◽  
Oligotrophic Bacterium ◽  
Clusters Of Orthologous Groups ◽  
Oligotrophic Water

Abstract The intensive and extensive application of imidacloprid in agriculture has resulted in water pollution and risks to aquatic invertebrates. However, pure bacteria remediation of imidacloprid in surface water environments has not been studied. Here, we isolated an imidacloprid-degrading bacterium from a water environment, examined its imidacloprid degradation in pure culture and surface water, sequenced its genome, and compared its Clusters of Orthologous Groups (COG) protein categorization with that for another imidacloprid-degrading bacterium. The isolate was an obligate oligotrophic bacterium, Hymenobacter latericoloratus CGMCC 16346, which degraded imidacloprid via hydroxylation by co-metabolism in pure culture. Resting cells degraded 64.4% of 100 mg/L imidacloprid in 6 d in the presence of co-substrate maltose, and growing culture degraded 40.8% of imidacloprid in 10 d. H. latericoloratus CGMCC 16346 degraded imidacloprid in surface water without co-substrate supplementation and retained imidacloprid-degrading activity after 30 d. The half-life of imidacloprid in surface water was decreased from 173.3 d in the control to 57.8 d by CGMCC 16346 inoculation. Genome sequencing and COG analysis indicated that carbohydrate metabolism and transport, cell wall/membrane biogenesis, and defense mechanisms are enriched in H. latericoloratus CGMCC 16346 compared with the copiotrophic imidacloprid-degrading Pseudoxanthomonas indica CGMCC 6648, indicating that H. latericoloratus CGMCC 16346 is adapted to live in oligotrophic water environments and biofilms. H. latericoloratus CGMCC 16346 is a promising bioremediation agent for elimination of imidacloprid contamination from surface water.

Surface Water Quality Assessment in Main Stream of Liaohe River

2013 ◽  
Vol 788 ◽  
pp. 354-358
Author(s):  
Hui Wang ◽  
Li Na Sun ◽  
Pan Du
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Assessment ◽  
Membership Function ◽  
Water Environment ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Monitoring Station ◽  
Main Stream ◽  
Liaohe River

The objective of this research was to study the surface water quality and evolution of surface water environment in Liaohe River main stream. Results showed that the surface water quality was declining along main stream. It was better in flood reason than others. It was best in Defudian monitoring station and worst in Shuguangdaqiao monitoring station. This research would significantly improve the understanding of the evolution of surface water environment in Liaohe River main stream.Keywords: water quality assessment; Liaohe River; membership function

scholarly journals Wastewater treatment in submerged aerated biofilter under condition of high ammonium concentration

2017 ◽  
Vol 24 (3) ◽  
pp. 431-442 ◽  
Author(s):  
Katarzyna Pawęska ◽  
Aleksandra Bawiec ◽  
Krzysztof Pulikowski
Keyword(s):  
Surface Water ◽  
Biological Membrane ◽  
Water Environment ◽  
Membrane System ◽  
Ammonia Nitrogen ◽  
Ammonium Concentration ◽  
Service Areas ◽  
Biogenic Compounds ◽  
Low Efficiency ◽  
Favorable Conditions

Abstract Treatment of wastewater produced in Service Areas (SA) located on expressways and highways is a worldwide problem because of increasing amount of roads and specific composition of those kinds of sewage. Insufficient removal of pollutants from wastewater discharged into surface water may cause serious environmental problems. In the present study efficiency of treatment of wastewater with high ammonium concentration in biological membrane system used on SA was investigated. Concentrations of ammonia nitrogen in wastewater flowing into bioreactor in none of the tested objects did not fall below 99.0 mg of N-NH4·dm−3. Because of high ammonium content in sewage and high pH reaching value about 9, it is almost impossible to create favorable conditions for microorganisms that run purification processes resulting in low efficiency of phosphorus and nitrogen removal (reduction of biogenic compounds did not exceed 15%). Treatment of wastewater consisting mainly of urine with commonly used biological membrane technology has to be widely tested to perform suitable quality of discharged wastewater, to provide safety of surface water environment.

scholarly journals Oligotrophic bacterium Hymenobacter latericoloratus CGMCC 16346 degrades the neonicotinoid imidacloprid in surface water

AMB Express ◽  
2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Leilei Guo ◽  
Zhiling Dai ◽  
Jingjing Guo ◽  
Wenlong Yang ◽  
Feng Ge ◽  
...  
Keyword(s):  
Surface Water ◽  
Oligotrophic Bacterium

Research on Water Ecology of Tunnel Engineering in Arid and Semi-Arid Regions

2012 ◽  
Vol 212-213 ◽  
pp. 647-652 ◽  
Author(s):  
Guo Zhen Zhang ◽  
Qian Wang ◽  
Fu Ping Wu
Keyword(s):  
Water Pollution ◽  
Surface Water ◽  
Arid Regions ◽  
Water Environment ◽  
Tunnel Construction ◽  
Construction Process ◽  
Tunnel Engineering ◽  
Surface Water And Groundwater ◽  
Semi Arid ◽  
Water Ecology

This article focuses on the tunnel construction process in arid and semi-arid regions which producing water environment problems ,proposing to initialize the control for the water pollution, containment of surface water and groundwater quality deterioration and loss of water and soil in the process of tunnel construction.The water eco-system of tunnel engineering in the arid and semi-arid regions is researched and established, so as to achieve the control for the surface water and groundwater pollution problems of tunnel project in arid and semi-arid regions, and to provide relevant guidance for the tunnel project.

scholarly journals Stability assessment of the chemical composition of the water used to supply the circuits in selected power plants of TAURON Group

2018 ◽  
Vol 44 ◽  
pp. 00064
Author(s):  
Marcin Karpiński ◽  
Kajetan d’Obyrn ◽  
Ewa Kmiecik ◽  
Barbara Tomaszewska
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
Mine Water ◽  
Power Plants ◽  
Negative Impact ◽  
Water Environment ◽  
Surface Water Quality ◽  
Electricity Production ◽  
Stability Assessment ◽  
Corrosion Properties

Electricity production in Poland is carried out mainly in conventional power plants, and the necessary resources include fuel and water. Significant water intake and production of sewage necessitate the application of technological solutions limiting the negative impact on the water environment. For this reason, Tauron Group's power plants for replenishing losses in cooling circuits use beside surface water, water from inactive mining plants. Due to the increased content of chlorides and sulphates in relation to surface water, mine water show significant corrosion properties. However, they are characterized by a relatively stable chemical composition mainly dependent on the physicochemical properties of the geological environment. The surface water quality is affected by many factors, such as seasons, thaws, rainfall, or the presence of pollutants from sewage disposal. The relative stability of the chemical composition of mine water allows for easier determination of chemical dosage during treatment process. The paper presents a stability assessment of the chemical composition of waters used to supplement circuits based on data from 2007–2017.

Public perception and water quality management

1996 ◽  
Vol 34 (12) ◽  
pp. 25-32 ◽  
Author(s):  
Margaret A. House
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Management ◽  
Environmental Quality ◽  
Public Perception ◽  
Water Quality Management ◽  
Management Strategies ◽  
Water Environment ◽  
Surface Water Quality ◽  
The Impact

The visual and odorous characteristics of the environment tend to be those which have the greatest impact upon the public's assessment of environmental quality. In many cases the public's perception of water quality may be based entirely on these aesthetic aspects of a water environment. Those responsible for the management of surface water quality recognise the need to apply a range of management strategies including a consideration of the public's perception of water quality and the impact of this upon their use of rivers and beaches for recreation and amenity. This paper reports upon the results from a recent investigation into the impact of sewage derived litter on perceived water and environmental quality.

Pollution Situation of Water Environment and Characteristics of Dissolved Oxygen of Yang River

2015 ◽  
Vol 1092-1093 ◽  
pp. 892-896
Author(s):  
Nan Li ◽  
Quan Wei Wei ◽  
Yi Hong Wu ◽  
Zai Feng Tian ◽  
Hong Bo Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Dissolved Oxygen ◽  
Water Environment ◽  
Monitoring Data ◽  
Water Safety ◽  
River Flows ◽  
Factors Affecting ◽  
Guanting Reservoir ◽  
Fourth Class

No.8 Bridge is the site where Yang River flows into Guanting Reservoir. It’s an important guarantee for the water safety of Guanting Reservoir that the water quality meets the standards steadily at No.8 Bridge. Based on the monitoring data from 2006 to 2013, the interannual and annual trends and correlations among DO, NH3-N and COD of Yang River were analyzed. The factors affecting DO were also discussed. The results showed that DO and COD met the fourth-class standard for surface water. NH3-N decreased year by year and its standard-reaching rate ran up to 70% since 2009. DO and COD, NH3-N was negatively correlated, but not significant, indicating that COD and NH3-N were not important factors affecting DO. DO varied along with seasons, autumn (mean 7.47mg /L) > spring (mean 7.35mg /L) > winter (mean 6.95mg /L) > summer (mean 6.35mg /L). Temperature is an important factor affecting DO. The possible impact on water environment of Guanting Reservoir caused by DO decrease should be paid special attention.

scholarly journals Microbial contamination in the surface water in the Ba Vi National Park, Ha Noi

2018 ◽  
Vol 9 (4) ◽  
pp. 217-222
Author(s):  
Nhu Da Le ◽  
Thi Xuan Binh Phung ◽  
Thi Phuong Quynh Le
Keyword(s):  
Surface Water ◽  
National Parks ◽  
Fecal Coliform ◽  
National Park ◽  
Microbial Contamination ◽  
Water Environment ◽  
Surface Water Quality ◽  
Total Coliform ◽  
Rare Plants ◽  
Sampling Campaign

Ba Vi National Park, one of 28 Vietnamese National Parks, is currently preserved and exploited for a variety of purposes, including the preservation of intact natural forest ecosystems and genetic resources of rare plants and animals. This paper presents the monitoring results of microbial contamination in surface water environment of the Ba Vi National Park (Ha Noi) in the period 2013-2014 and 2018. The results showed that total coliform (TC) density varied from 23 to 11,000 MPN/100ml in bimonthly observation in 2013-2014 which was lower than that one of sampling campaign in 2018, from 900 MPN/100ml to 8,100 MPN/ml. Fecal coliform (FC) densities varied from 0 to 110 MPN/100ml in 2013-2014, lower than in 2018, when it varied from 0 MPN/100ml to 600 MPN/100ml. At several observation times, both TC and FC were higher than the allowable values of the Vietnam national technical regulation QCVN 08-MT: 2015/BTNMT column A1 for surface water quality. The exceeded values of TC and FC than the allowable values and the increase trend from the 2013 to 2018 periods indicated the potential risks to the public health in this region when people use water for domestic and agricultural purposes. Our results provide dataset for environmental management in the Ba Vi National Park in order to protect the eco-environment in parallel with social-economic development. Vườn Quốc gia Ba Vì, một trong 28 vườn quốc gia của Việt Nam hiện đang được bảo tồn và khai thác cho nhiều mục đích, trong đó có bảo tồn nguyên vẹn các hệ sinh thái rừng tự nhiên, các nguồn gen động, thực vật quý hiếm, các đặc sản rừng và các di tích lịch sử, cảnh quan tự nhiên trong vùng. Bài báo trình bày kết quả quan trắc, đánh giá mức độ ô nhiễm vi sinh vật trong môi trường nước mặt tại Vườn Quốc Gia Ba Vì, Hà Nội giai đoạn 2013-2014 và 2018. Kết quả cho thấy mật độ coliform tổng số (TC) biến đổi trong khoảng từ 23 – 11.000 MPN/100ml trong các đợt quan trắc định kỳ 2 tháng/lần trong hai năm 2013 - 2014 và trong khoảng từ 900 – 8.100 MPN/100ml trong một đợt quan trắc năm 2018. Mật độ fecal coliform (FC) biến đổi trong khoảng từ 0 - 110 MPN/100ml năm 2013 -2014 và từ 0 - 600 MPN/100ml vào năm 2018. Vào một số thời điểm quan trắc, mật độ FC và TC vượt giá trị cho phép của quy chuẩn kỹ thuật Quốc Gia QCVN 08-MT:2015/BTNMT cột A1 về chất lượng nước mặt. Các giá trị TC và FC vượt quá giá trị cho phép và xu hướng gia tăng TC và FC từ 2013 -2018 cho thấy nguy cơ tiềm tàng khi người dân sử dụng nguồn nước này cho các mục đích sinh hoạt và nông nghiệp. Như vậy, kết quả của nghiên cứu này nhấn mạnh nhu cầu giám sát thường xuyên chất lượng nước và cần thực hiện các giải pháp hiệu quả để xử lý và quản lý nguồn gây ô nhiễm trong khu vực nhằm bảo vệ môi trường sinh thái song song với phát triển kinh tế - xã hội của khu vực.

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