Surface water seal application to minimize volatilization loss of methyl isothiocyanate from soil columns

2010 ◽  
Vol 66 (6) ◽  
pp. 686-692 ◽  
Author(s):  
Catherine R Simpson ◽  
Shad D Nelson ◽  
Jerry E Stratmann ◽  
Husein A Ajwa
Keyword(s):  
Surface Water ◽  
Soil Columns ◽  
Methyl Isothiocyanate ◽  
Water Seal

Fate of effluent organic matter (EfOM) and natural organic matter (NOM) through riverbank filtration

2008 ◽  
Vol 57 (12) ◽  
pp. 1999-2007 ◽  
Author(s):  
S. K. Maeng ◽  
S. K. Sharma ◽  
A. Magic-Knezev ◽  
G. Amy
Keyword(s):  
Organic Matter ◽  
Surface Water ◽  
Natural Organic Matter ◽  
Wastewater Effluent ◽  
Riverbank Filtration ◽  
Soil Columns ◽  
Effluent Organic Matter ◽  
Bulk Organic Matter ◽  
Water And Wastewater ◽  
The Impact

Understanding the fate of effluent organic matter (EfOM) and natural organic matter (NOM) through riverbank filtration is essential to assess the impact of wastewater effluent on the post treatment requirements of riverbank filtrates. Furthermore, their fate during drinking water treatment can significantly determine the process design. The objective of this study was to characterise bulk organic matter which consists of EfOM and NOM during riverbank filtration using a suite of innovative analytical tools. Wastewater effluent-derived surface water and surface water were used as source waters in experiments with soil columns. Results showed the preferential removal of non-humic substances (i.e. biopolymers) from wastewater effluent-derived surface water. The bulk organic matter characteristics of wastewater effluent-derived surface water and surface water were similar after 5 m soil passage in laboratory column experiment. Humic-like organic matter in surface water and wastewater effluent-derived surface water persisted through the soil passage. More than 50% of total dissolved organic carbon (DOC) removal with significant reduction of dissolved oxygen (DO) was observed in the top 50 cm of the soil columns for both surface water and wastewater effluent-derived surface water. This was due to biodegradation by soil biomass which was determined by adenosine triphosphate (ATP) concentrations and heterotrophic plate counts. High concentrations of ATP in the first few centimeters of infiltration surface reflect the highest microbial activity which correlates with the extent of DOC reduction. Good correlation of DOC removal with DO and biomass development was observed in the soil columns.

Behavior of 1,3-dichloropropene and methyl isothiocyanate in undisturbed soil columns

Chemosphere ◽  
2003 ◽  
Vol 52 (5) ◽  
pp. 893-899 ◽  
Author(s):  
N. El Hadiri ◽  
M. Ammati ◽  
M. Chgoura ◽  
K. Mounir
Keyword(s):  
Soil Columns ◽  
Methyl Isothiocyanate ◽  
Undisturbed Soil

Application of a Simple Cold Stub to the Direct Observation of Frozen Hydrated Sand

1973 ◽  
Vol 31 ◽  
pp. 212-213
Author(s):  
John M. Wehrung ◽  
Richard J. Harniman
Keyword(s):  
United States ◽  
Surface Water ◽  
Direct Observation ◽  
Controlled Study ◽  
Clay Particles ◽  
Organic Debris ◽  
Rock Formations ◽  
Water Tables ◽  
Permeable Rock ◽  
Natural Means

Water tables in aquifer regions of the southwest United States are dropping off at a rate which is greater than can be replaced by natural means. It is estimated that by 1985 wells will run dry in this region unless adequate artificial recharging can be accomplished. Recharging with surface water is limited by the plugging of permeable rock formations underground by clay particles and organic debris.A controlled study was initiated in which sand grains were used as the rock formation and water with known clay concentrations as the recharge media. The plugging mechanism was investigated by direct observation in the SEM of frozen hydrated sand samples from selected depths.

AN EVALUATION OF SUB-SURFACE WATER QUALITY AROUND BHARUCH-SURAT INDUSTRIAL REGION, GUJARAT, INDIA

2019 ◽  
Vol 38 (2) ◽  
pp. 200-220
Author(s):  
SOMNATH SAHA ◽  
◽  
SUKANTA KUMAR SAHA ◽  
TATHAGATA GHOSH ◽  
ROLEE KANCHAN ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Industrial Region
Sign in / Sign up

Export Citation Format

Share Document