scholarly journals Global diagnosis of nitrate pollution in groundwater and review of removal technologies

2021 ◽  
pp. 152233
Author(s):  
E. Abascal ◽  
L. Gómez-Coma ◽  
I. Ortiz ◽  
A. Ortiz
Keyword(s):  
Nitrate Pollution ◽  
Removal Technologies

Application of three different methods to evaluate the nitrate pollution of groundwater in the Arborea plain (Sardinia – Italy)

2015 ◽  
Vol 35 ◽  
pp. 136-139 ◽  
Author(s):  
Maria Laura Foddis ◽  
Anna Matzeu ◽  
Augusto Montisci ◽  
Gabriele Uras
Keyword(s):  
Nitrate Pollution

River-Basin Planning for Control of Nitrate Pollution

1982 ◽  
Vol 14 (4-5) ◽  
pp. 245-252 ◽  
Author(s):  
C S Sinnott ◽  
D G Jamieson
Keyword(s):  
Time Series ◽  
Time Series Analysis ◽  
River Basin ◽  
Water Resource ◽  
Potable Water ◽  
Potential Problem ◽  
Nitrate Pollution ◽  
Optimal Mix ◽  
Regional Basis ◽  
The Impact

The combination of increasing nitrate concentrations in the River Thames and the recent EEC Directive on the acceptable level in potable water is posing a potential problem. In assessing the impact of nitrates on water-resource systems, extensive use has been made of time-series analysis and simulation. These techniques are being used to define the optimal mix of alternatives for overcoming the problem on a regional basis.

A Review on the Removal Technologies of Nickel(II) Ion from Aqueous So-lution

2017 ◽  
Vol 11 (1) ◽  
pp. 21-34 ◽  
Author(s):  
M. Khobragade ◽  
A. Nayak ◽  
A. Pal
Keyword(s):  
Removal Technologies

Nitrate Pollution in Groundwater and Their Possible Remediation Through Adsorption

2021 ◽  
pp. 105-119
Author(s):  
Arun Lal Srivastav ◽  
Naveen Patel ◽  
Uday Bhan Prajapati ◽  
Vinod Kumar Chaudhary
Keyword(s):  
Nitrate Pollution

Tracing nitrate pollution sources and transformation in surface- and ground-waters using environmental isotopes

2014 ◽  
Vol 490 ◽  
pp. 213-222 ◽  
Author(s):  
Yan Zhang ◽  
Fadong Li ◽  
Qiuying Zhang ◽  
Jing Li ◽  
Qiang Liu
Keyword(s):  
Environmental Isotopes ◽  
Nitrate Pollution ◽  
Pollution Sources ◽  
Ground Waters

The deep challenge of nitrate pollution in river water of China

2021 ◽  
Vol 770 ◽  
pp. 144674 ◽  
Author(s):  
Xin Zhang ◽  
Yan Zhang ◽  
Peng Shi ◽  
Zhilei Bi ◽  
Zexuan Shan ◽  
...  
Keyword(s):  
River Water ◽  
Nitrate Pollution

scholarly journals Spatial variability of nitrate pollution and its sources in a hilly basin of the Yangtze River based on clustering

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuhuan Cui ◽  
Jie Wang ◽  
Shuang Hao
Keyword(s):  
Surface Water ◽  
Yangtze River ◽  
Drainage Basin ◽  
Quality Standard ◽  
Nitrate Pollution ◽  
Middle Part ◽  
Lake Basin ◽  
The Yangtze River ◽  
Nitrate Sources ◽  
Groundwater Samples

AbstractNitrate (NO3−) pollution is a serious global problem, and the quantitative analysis of its sources contributions is essential for devising effective water-related environmental-protection policies. The Shengjin Lake basin, located in the middle to lower reaches of the Yangtze River in China was selected as the research area in our study. We first grouped 29 surface water samples and 33 groundwater samples using cluster analysis, and then analyzed potential nitrate sources for each dataset of δ15N–NO3− and δ18O–NO3− isotope values by applying a Bayesian isotope-mixing model. Our results show that the nitrogen pollution in the surface-ground water in the study area seriously exceeded to class V of the Environmental Quality Standard of Surface Water of China. The NO3− in surface water from the mid-upper reaches of the drainage basin mainly originates from soil nitrogen (SN) and chemical fertilizer (CF), with contribution rates of 48% and 32%, respectively, and the NO3− in downstream areas mainly originates from CF and manure and sewage (MS), with contribution rates of 48% and 33%, respectively. For the groundwater samples, NO3− mainly originates from MS, CF, and SN in the mid-upper reaches of the drainage basin and the northside of Dadukou near the Yangtze River, with contribution rates of 34%, 31%, and 29%, respectively, whereas NO3− in the lower reaches and the middle part of Dadukou mainly originates from MS, with a contribution rate of 83%. The nitrogen conversion of surface water in lakes and in the mid-upper reaches is mainly affected by water mixing, while the groundwater and surface water in the lower plains are mainly affected by denitrification. The method proposed in this study can expand the ideas for tracking nitrate pollution in areas with complex terrain, and the relevant conclusions can provide a theoretical basis for surface and groundwater pollution control in the hilly basin of Yangtze River.

A review on bromate occurrence and removal strategies in water supply

2006 ◽  
Vol 6 (6) ◽  
pp. 131-136 ◽  
Author(s):  
L. Xie ◽  
C. Shang
Keyword(s):  
Water Supply ◽  
Control Strategies ◽  
Well Being ◽  
Potential Health ◽  
Drinking Water Standard ◽  
Carbon Adsorption ◽  
The Us ◽  
Current Maximum ◽  
Ammonia Addition ◽  
Removal Technologies

The need of disinfecting potable water to eliminate potential health risks associated with waterborne pathogens, however inevitably resulting in leaving elevated toxicity in water by forming disinfection by-products (DBPs) is being considered as one of the primary threats to human well-being. Bromate is a carcinogenic DBP mainly formed during ozonation of bromide-containing water. The current maximum contaminant level (MCL) of bromate in the US national primary drinking water standard is set at 10 μg/L. With continuous improvements in analytical instrumentation and removal technologies, a lower MCL for bromate is expected in the future. Current researches on bromate control strategies involve minimizing bromate formation (like ammonia addition) or removing bromate after formation (like carbon adsorption), however have their own limitations. Seeking for alternative bromate control strategies that can be used alone (or in combine with others) is of great value and in urgent need when water quality standards are getting more stringent. This paper reviews the occurrence of bromate in water supply and evaluates the effectiveness of bromate removal technologies applied, to advance our understanding of bromate fate and degradation in water supply system for future study.

Arsenic Speciation: Reduction of Arsenic(V) to Arsenic(III) by Fulvic Acid

2006 ◽  
Vol 3 (2) ◽  
pp. 137 ◽  
Author(s):  
Tsanangurayi Tongesayi ◽  
Ronald B. Smart
Keyword(s):  
Fulvic Acid ◽  
Arsenic Removal ◽  
Research Effort ◽  
Arsenic Speciation ◽  
Inorganic Arsenic ◽  
Stripping Voltammetry ◽  
Reduction Reaction ◽  
Cathodic Stripping Voltammetry ◽  
Suwannee River Fulvic Acid ◽  
Removal Technologies

Environmental Context.Most technologies for arsenic removal from water are based on the oxidation of the more toxic and more mobile arsenic(iii) to the less toxic and less mobile arsenic(v). As a result, research effort has been focussed on the oxidation of arsenic(iii) to arsenic(v). It is equally important to explore environmental factors that enhance the reduction of arsenic(v) to arsenic(iii). An understanding of the redox cycling of arsenic could result in the development of cheaper and more efficient arsenic removal technologies, especially for impoverished communities severely threatened by arsenic contamination. Abstract.The objective of this study was to investigate the reduction of inorganic arsenic(v) with Suwannee River fulvic acid (FA) in aqueous solutions where pH, [FA], [As(v)], [As(iii)], and [Fe(iii)] were independently varied. Samples of inorganic As(v) were incubated with FA in both light and dark at constant temperature. Sterilisation techniques were employed to ensure abiotic conditions. Aliquots from the incubated samples were taken at various time intervals and analysed for As(iii) using square-wave cathodic-stripping voltammetry at a hanging mercury drop electrode. The study demonstrated the following important aspects of As speciation: (1) FA can significantly reduce As(v) to As(iii); (2) reduction of As(v) to As(iii) is a function of time; (3) both dark and light conditions promote reduction of As(v) to As(iii); (4) Fe(iii) speeds up the reduction reaction; and (5) oxidation of As(iii) to As(v) is promoted at pH 2 more than at pH 6.

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