Changes in water microbial quality during bank filtration of lake water

We studied, during a 2-year period, how the microbial stability of water changed when humus-rich lake water was filtered through the ground at a bank filtration water plant. The changes in microbial quality were followed as microbial numbers and growth activity. The filtration decreased microbial counts and growth ([3H]thymidine technique) in water up to 90%. The reduction in bacterial counts and growth depended on the filtration distance. The reduction was greatest between the lake and the first sampling point. Microbial numbers and growth declined steadily after infiltration with increased filtration distance. Viable counts of heterotrophic bacteria decreased faster than total bacterial counts along filtration. The microbial numbers and bacterial production in water followed seasonal changes in water temperature. Simultaneously with the microbial numbers, the concentrations of total organic carbon and assimilable organic carbon decreased during bank filtration. These results showed that microbial stability of humus-rich water was increased by filtration to a level generally found in natural groundwaters.Key words: bacteria, bank filtration, biological stability, drinking water, groundwater.

Download Full-text

Humus transformation at the bank filtration water plant

Water Science & Technology ◽

10.2166/wst.1994.0526 ◽

1994 ◽

Vol 30 (10) ◽

pp. 179-187 ◽

Cited By ~ 28

Author(s):

I. T. Miettinen ◽

P. J. Martikainen ◽

T. Vartiainen

Keyword(s):

Organic Matter ◽

Surface Water ◽

Organic Carbon ◽

Chemical Oxygen Demand ◽

Total Organic Carbon ◽

Lake Water ◽

Oxygen Demand ◽

Bank Filtration ◽

Water Plant

Transformations in the amount and quality of organic matter (humus) during bank filtration of surface water were studied by analyzing the changes in total organic carbon (TOC), non-purgeable organic carbon (NPOC), chemical oxygen demand (COD), color of water, and UV absorbing humus fractions. The amount of organic matter expressed as TOC, NPOC, and COD depended on temperature and filtration distance from lake water. The color of water and the UV absorbing humus peaks presenting different humus molecule fractions decreased more effectively than other parameters measuring the amount of organic matter in water. The ratio of COD to TOC decreased when the filtration distance of water increased. Our observations indicated that bank filtration of humus-rich lake water changed more the quality of organic matter than its total amount.

Download Full-text

Removal of bulk dissolved organic carbon (DOC) and trace organic compounds by bank filtration and artificial recharge

Water Research ◽

10.1016/j.watres.2005.05.030 ◽

2005 ◽

Vol 39 (14) ◽

pp. 3219-3228 ◽

Cited By ~ 204

Author(s):

Steffen Grünheid ◽

Gary Amy ◽

Martin Jekel

Keyword(s):

Organic Carbon ◽

Dissolved Organic Carbon ◽

Organic Compounds ◽

Artificial Recharge ◽

Bank Filtration ◽

Trace Organic Compounds ◽

Trace Organic

Download Full-text

Traces of sunlight in the organic matter biogeochemistry of two shallow subarctic lakes

Biogeochemistry ◽

10.1007/s10533-021-00820-9 ◽

2021 ◽

Author(s):

Marttiina V. Rantala ◽

Carsten Meyer-Jacob ◽

E. Henriikka Kivilä ◽

Tomi P. Luoto ◽

Antti. E. K. Ojala ◽

...

Keyword(s):

Organic Matter ◽

Organic Carbon ◽

Lake Sediments ◽

Lake Water ◽

Human Impacts ◽

Global Environmental Change ◽

Carbon Export ◽

Subarctic Lakes ◽

Carbon Regulation ◽

In Situ Experiments

AbstractGlobal environmental change alters the production, terrestrial export, and photodegradation of organic carbon in northern lakes. Sedimentary biogeochemical records can provide a unique means to understand the nature of these changes over long time scales, where observational data fall short. We deployed in situ experiments on two shallow subarctic lakes with contrasting light regimes; a clear tundra lake and a dark woodland lake, to first investigate the photochemical transformation of carbon and nitrogen elemental (C/N ratio) and isotope (δ13C, δ15N) composition in lake water particulate organic matter (POM) for downcore inferences. We then explored elemental, isotopic, and spectral (inferred lake water total organic carbon [TOC] and sediment chlorophyll a [CHLa]) fingerprints in the lake sediments to trace changes in aquatic production, terrestrial inputs and photodegradation before and after profound human impacts on the global carbon cycle prompted by industrialization. POM pool in both lakes displayed tentative evidence of UV photoreactivity, reflected as increasing δ13C and decreasing C/N values. Through time, the tundra lake sediments traced subtle shifts in primary production, while the woodland lake carried signals of changing terrestrial contributions, indicating shifts in terrestrial carbon export but possibly also photodegradation rates. Under global human impact, both lakes irrespective of their distinct carbon regimes displayed evidence of increased productivity but no conspicuous signs of increased terrestrial influence. Overall, sediment biogeochemistry can integrate a wealth of information on carbon regulation in northern lakes, while our results also point to the importance of considering the entire spectrum of photobiogeochemical fingerprints in sedimentary studies.

Download Full-text

Global Landscape of Total Organic Carbon, Nitrogen and Phosphorus in Lake Water

Scientific Reports ◽

10.1038/srep15043 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 32

Author(s):

Ming Chen ◽

Guangming Zeng ◽

Jiachao Zhang ◽

Piao Xu ◽

Anwei Chen ◽

...

Keyword(s):

Organic Carbon ◽

Total Organic Carbon ◽

Lake Water ◽

Nitrogen And Phosphorus

Download Full-text

SPATIALIZATION OF SOIL CHEMICAL AND PHYSICAL ATTRIBUTES IN AN AGROFORESTRY SYSTEM, SEROPÉDICA, BRAZIL

CERNE ◽

10.1590/01047760201622042159 ◽

2016 ◽

Vol 22 (4) ◽

pp. 407-414 ◽

Cited By ~ 2

Author(s):

Camila Santos da Silva ◽

Marcos Gervasio Pereira ◽

Rafael Coll Delgado ◽

Eduardo Vinícius da Silva

Keyword(s):

Organic Carbon ◽

Spatial Interpolation ◽

Spatial Models ◽

Agroforestry System ◽

Exchange Capacity ◽

Sampling Point ◽

Distribution Maps ◽

First Order ◽

Semivariogram Analysis ◽

Physical Attributes

ABSTRACT The purpose of this study was to spatialize the chemical and physical attributes of the soil in an agroforestry system in Seropédica, Rio de Janeiro, Brazil. Thirty-one soil samples were collected from 0-10 cm, 10-20 cm, and 20-40 cm depths, and each sampling point was georeferenced. The pH (in H2O), potential acidity (H+Al), calcium (Ca+2), magnesium (Mg+2), aluminum (Al+3), sodium (Na+), potassium (K+), phosphorus (P), organic carbon (C), cation exchange capacity of the soil (T value), base saturation (V value), total clay, total sand, silt, and density of fine roots were measured. The software ArcGIS 10.2 was used to perform the semivariogram analysis and the fitting of the models, and spatial interpolation was performed using a first-order trend ordinary kriging process with spherical, exponential, and Gaussian spatial models. Based on the results, only the exponential and Gaussian models were fitted to the variables, except for the Mg2+ and V value variables, which presented no spatial dependence, thus showing a pure nugget effect (PNE). Distribution maps were generated for the variables (except for those exhibiting PNE), which showed correlation between the variables pH and Al3+, organic carbon and cations, phosphorus and total clay, and silt and sand. Overall, geostatistics could be applied to spatialize the chemical and physical attributes of the soil in the agroforestry system, except in the case of Mg2+ and the V value.

Download Full-text