scholarly journals The effect of ecological restoration based artificial reoxygenation on water quality Improvement of urban river water

2018 ◽  
Vol 246 ◽  
pp. 02037
Author(s):  
Nan Luo ◽  
Changying Hu ◽  
Weiyu Li ◽  
Tao Xie ◽  
HuiLi Gong ◽  
...  
Keyword(s):  
Water Quality ◽  
Ammonium Nitrogen ◽  
Urban River ◽  
In Situ Remediation ◽  
Quality Degradation ◽  
Total Phosphorous ◽  
Filter Bed ◽  
Microbial Agents

Urban river pollution sources such as Combined Sewer Overflows (CSOs) or Illegally Discharging of Industrial Waste (IDIW) are generally hard to control on-site and cause serious water quality degradation problems across the nation. Therefore developing effective in-situ remediation techniques for urban rivers is of great interest. In this research we combined river reoxygenation, artificial floating island and microbial agents technologies (O-AFI-MA) to developed a comprehensive in-situ remediation technique and obtained water quality data from Sunhe River case study to evaluate its effectiveness. Our discovery indicates that the O-AFI-MA technique effectively improves water quality by reducing chemical oxygen demand (CODCr), total phosphorous (TP), ammonium nitrogen (NH4+-N) level by 45.9%, 61.31, 7.66% respectively and our technique enhances the natural degradation rate by raising the dissolved oxygen (DO) level from 2.8mg/L to 10mg/L upstream. The case study suggests that the sediment accumulation from CSOs and the subsequent internal source release causes great water quality degradation for Sunhe River. We also tested combinatory microbial agents, physical adsorption and multimedia bio-filter bed technologies independently on site to improve the ammonium nitrogen and total phosphorous removal rate of our technique, and the multimedia bio-filter bed is found to be most effective.

Risk prediction of microcystins based on water quality surrogates: A case study in a eutrophicated urban river network

2021 ◽  
Vol 275 ◽  
pp. 116651
Author(s):  
Xinchen He ◽  
Hua Wang ◽  
Wei Zhuang ◽  
Dongfang Liang ◽  
Yanhui Ao
Keyword(s):  
Water Quality ◽  
Risk Prediction ◽  
River Network ◽  
Urban River

scholarly journals Some indicators of water quality of the Tamis river

2011 ◽  
Vol 17 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Nada Babovic ◽  
Dejan Markovic ◽  
Vojkan Dimitrijevic ◽  
Dragan Markovic
Keyword(s):  
Water Quality ◽  
Ph Value ◽  
Ammonium Nitrogen ◽  
Field Analysis ◽  
Total Hardness ◽  
Chemical Parameters ◽  
Physico Chemical

This paper shows the results obtained in field analysis performed at the Tamis River, starting from the settlement Jasa Tomic - border between Serbia and Romania to Pancevo - confluence of Tamis into the Danube. The Tamis is a 359 km long river rising in the southern Carpathian Mountains. It flows through the Banat region and flows into the Danube near Pancevo. During the years the water quality of the river has severely deteriorated and badly affected the environment and the river ecosystem. In situ measurements enabled determination of physico-chemical parameters of water quality of the Tamis River on every 400 m of the watercourse, such as: water temperature, pH value, electrical conductivity, contents of dissolved oxygen and oxygen saturation. The main reason of higher pollution of Tamis is seen in connection to DTD hydro system. Sampling was performed at 7 points with regard to color, turbidity, total hardness, alkalinity, concentration of ammonium nitrogen, nitrite nitrogen, nitrate nitrogen, iron, chlorides and sulphates in samples. The aim of the present work was to evaluate water quality in the Tamis River taking into account significant pollution, which originates from settlements, industry and agriculture, and to suggest appropriate preventive measures to further pollution decreasing of the river's water.

scholarly journals Strategic selection of an optimal sorbent mixture for in-situ remediation of heavy metal contaminated sediments: Framework and case study

2012 ◽  
Vol 105 ◽  
pp. 1-11 ◽  
Author(s):  
Y.W. Chiang ◽  
R.M. Santos ◽  
K. Ghyselbrecht ◽  
V. Cappuyns ◽  
J.A. Martens ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Contaminated Sediments ◽  
In Situ Remediation ◽  
Selection Of

Monitoring Urban River Water Quality Using Macroinvertebrate and Physico-Chemical Parameters: Case study of Penchala River, Malaysia

2013 ◽  
Vol 13 (6) ◽  
pp. 474-482 ◽  
Author(s):  
Akmal Mahazar ◽  
Mohammad Shuhaimi-O ◽  
Ahmad Abas Kutty ◽  
Mohamed Nor Mohamed De
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Water Quality ◽  
Urban River ◽  
Chemical Parameters ◽  
Physico Chemical

scholarly journals In situ Remediation Technologies Associated with Sanitation Improvement: An Opportunity for Water Quality Recovering in Developing Countries

10.5772/32068 ◽  
2012 ◽  
Author(s):  
Davi Gasparini Fernandes Cunha ◽  
Maria do Carmo Calijuri ◽  
Doron Grull ◽  
Pedro Caetano Sanches Mancuso ◽  
Daniel R.
Keyword(s):  
Water Quality ◽  
Developing Countries ◽  
In Situ Remediation

scholarly journals Improved the in-Situ Remediation Effect of Sediment Microbial Fuel Cells by Optimizing the Anode Structure

2021 ◽  
Author(s):  
Henan Li ◽  
Guohong Liu ◽  
Chao Li ◽  
Yongli Sun ◽  
Yujie Feng
Keyword(s):  
Microbial Fuel Cells ◽  
River Sediment ◽  
Three Dimensional ◽  
Honeycomb Structure ◽  
Pollutant Removal ◽  
In Situ Remediation ◽  
Higher Power ◽  
Sediment Carbon

Abstract Six 60-L benthic microbial electrochemical systems (BMES) were built for the bioremediation of river sediment. Carbon mesh anodes with honeycomb-structure supports were compared with horizontal anodes, and the system was tested using different cover depths and anode densities. The pollutant removal, electricity generation, and electrochemistry of the six BMES with different anodes was examined using the Ashi River (Harbin, China) as a case study. Total organic carbon (TOC) and total nitrogen (TN) removal from sediments in BMES with three-dimensional anodes were 20%~30% and 20%~33% higher for the other reactors. Moreover, the honeycomb-structure of the anode also resulted in higher power density and improved humus removal.

scholarly journals Micronucleus test in fish for in situ evaluation of the Sinos River water quality, in Brazil

2019 ◽  
Vol 41 ◽  
pp. e38
Author(s):  
Leonardo Airton Ressel Simões ◽  
Thaís Dalzochio ◽  
Angélica Goldoni ◽  
Mateus Santos de Souza ◽  
Gabriela Zimmermann Prado Rodrigues ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Micronucleus Test ◽  
Physicochemical Analysis ◽  
River Water Quality ◽  
Urban Wastewater ◽  
Nuclear Abnormalities ◽  
Total Phosphorous ◽  
Urban Wastewater Treatment

The Sinos River basin is impacted by industrial and agricultural activities, as well as by low rates of urban wastewater treatment. The purpose of this study was to monitor de Sinos River water quality using the micronucleus test in fish and the analysis of water physicochemical parameters. Bryconamericus iheringii specimens were captured in December 2013 (summer) and July 2014 (winter) at two sites located in the Sinos River: Caraá, in the upper section of the basin, and Parobé, in the middle section. After capture, animals were immediately killed and blood samples were collected for the micronucleus test. No significant differences were observed in micronucleus frequencies between sites and sampling periods. However, in the summer, nuclear abnormalities frequencies observed in Parobé were significantly higher than in Caraá. A higher frequency of nuclear abnormalities was also found in fish captured in Caraá during winter, in comparison with frequencies found in the summer. The results for the water physicochemical analysis showed values of total phosphorous, aluminum, lead, copper and iron above the allowed limits established by the Brazilian legislation. The nuclear abnormalities induction found in the present study may be associated to the presence of cytogenotoxic substances in the water.

scholarly journals Shift of Sediments Bacterial Community in the Black-Odor Urban River during In Situ Remediation by Comprehensive Measures

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2129 ◽  
Author(s):  
Jian Zhang ◽  
Yun Tang ◽  
Zhanguo Kou ◽  
Xiao Teng ◽  
Wei Cai ◽  
...  
Keyword(s):  
Water Quality ◽  
Bacterial Community ◽  
Organic Pollutants ◽  
In Situ Remediation ◽  
Sediment Remediation ◽  
Overlying Water ◽  
Rapid Urbanization ◽  
Associated Bacteria

The phenomenon of black-odor urban rivers with rapid urbanization has attracted extensive attention. In this study, we investigated the water quality and composition of sediment-associated bacteria communities in three remediation stages (before remediation, 30 days after remediation, and 90 days after remediation) based on the in situ remediation using comprehensive measures (physical, chemical, and biological measures). The results show that the overlying water quality was notably improved after in situ remediation, while the diversity and richness of sediment-associated bacterial communities decreased. A growing trend of some dominant genus was observed following the remediation of a black-odor river, such as Halomonas, Pseudomonas, Decarbonamis, Leptolina, Longilina, Caldiseericum, Smithella, Mesotoga, Truepera, and Ralstonia, which play an important role in the removal of nitrogen, organic pollutants and hydrogen sulfide (H2S) during the sediment remediation. Redundancy analysis (RDA) showed that the bacterial community succession may accelerate the transformation of organic pollutants into inorganic salts in the sediment after in situ remediation. In a word, the water quality of the black-odor river was obviously improved after in situ remediation, and the bacterial community in the sediment notably changed, which determines the nutrients environment in the sediment.

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