Relationship between di-(2-ethylhexyl) phthalate concentration and chemical structure of organic matter on solids in drinking water treatment processes

2004 ◽  
Vol 4 (5-6) ◽  
pp. 321-333 ◽  
Author(s):  
Y. Thaveemaitree ◽  
F. Nakajima ◽  
H. Furumai ◽  
S. Kunikane
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Toxic Substance ◽  
Drinking Water Treatment ◽  
Solid Particles ◽  
High Concentration ◽  
Fragment Composition ◽  
Treatment Processes ◽  
Ethylhexyl Phthalate

Di-(2-ethylhexyl) phthalate (DEHP), regarded as a toxic substance, is widely used and abundantly contaminated in environments. Via contamination of freshwater, DEHP can enter into drinking water treatment and be adsorbed on solid particles. This study was aimed at understanding the concentration phenomenon of DEHP in drinking water treatment process, focusing on the relationship between DEHP concentration and characteristics of organic matter on the solids formed in the processes as scum, suspended solid and sludge. Solid samples were collected from five drinking water treatment processes in Japan and analyzed by pyrolysis GC/MS. The solids were categorized by the sampling locations, solid types and fragment composition. The specificity of the pyrolysis fragments in each group was summarized into a matrix. When compared with concentration of DEHP and characteristics of organic matter, a solid specifically containing many specific aliphatic fragments contained significantly high concentration of DEHP.

Drinking water treatment - understanding the processes and meeting the challenges

2001 ◽  
Vol 1 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Don Bursill
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Drinking Water Treatment ◽  
Predictive Capacity ◽  
Treatment Processes ◽  
Key Factor ◽  
Work Done ◽  
Water Catchments

On and follow Natural organic matter (NOM) derived from soil and vegetation in water catchments is the key factor influencing most, if not all water treatment processes. The structure of the NOM and its involvement in water treatment processes requires better understanding. It seems likely that a better understanding of NOM reactions could lead to far better predictive capacity for water treatment designers and operators. Certainly the removal of NOM as a first step to the production of drinking water has many attractions. This paper provides an overview of work done by the author and many of his colleagues to advance this issue.

A review of different drinking water treatments for natural organic matter removal

2015 ◽  
Vol 15 (3) ◽  
pp. 442-455 ◽  
Author(s):  
Yue Zhang ◽  
Xinhua Zhao ◽  
Xinbo Zhang ◽  
Sen Peng
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Biological Treatment ◽  
Treatment Options ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
Drinking Water Purification ◽  
Water Treatments

In the past decades, natural organic matter (NOM), which is a complex heterogeneous mixture of organic materials that are commonly present in all surface, ground and soil waters, has had an adverse effect on drinking water treatment. The existence of NOM results in many problems in drinking water treatment processes, and the properties and amount of NOM can significantly affect the efficiency of these processes. NOM not only influences the water quality with respect to taste, color and odor problems, but it also reacts with disinfectants, increasing the amount of disinfection by-products. NOM can be removed from drinking water via several treatment processes, but different drinking water treatment processes have diverse influences on NOM removal and the safety of the drinking water. Several treatment options, including coagulation, adsorption, oxidation, membrane and biological treatment, have been widely used in drinking water purification processes. Therefore, it is of great importance to be able to study the influence of different treatment processes on NOM in raw waters. The present review focuses on the methods, including coagulation, adsorption, oxidation, membrane, biological treatment processes and the combination of different treatment processes, which are used for removing NOM from drinking water.

scholarly journals Understanding the behaviour of molecular weight fractions of natural organic matter to improve water treatment processes

2010 ◽  
Vol 10 (1) ◽  
pp. 59-68 ◽  
Author(s):  
I. Kristiana ◽  
B. P. Allpike ◽  
C. A. Joll ◽  
A. Heitz ◽  
R. Trolio
Keyword(s):  
Molecular Weight ◽  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Drinking Water Treatment ◽  
Size Exclusion ◽  
Aromatic Character ◽  
Relative Contribution ◽  
Treatment Processes

Water utilities have experienced increasing pressure to minimise the formation of disinfection by-products (DBPs), as reflected in the increasingly stringent regulations and guidelines for the concentrations of DBPs in drinking water. Understanding the disinfection characteristics and molecular weight (MW) distribution of natural organic matter (NOM) will assist in the optimisation of drinking water treatment processes to minimise the formation of DBPs. This study investigated the disinfection behaviour of MW fractions of NOM isolated from a Western Australian source water. The NOM was fractionated and separated using preparative size exclusion chromatography (SEC) and the fractions were chlorinated in the presence of bromide ion. The larger MW fractions of NOM were found to produce the highest concentrations of DBPs (trihalomethanes, haloacetic acids, haloacetonitriles, haloketones, and haloaldehydes), with the low MW fractions still producing significant amounts of these DBPs. The results also showed a trend of an increasing proportion of brominated DBPs with decreasing MW and aromatic character. Considering that the smaller MW fractions of NOM produce significant amounts of DBPs, with a higher relative contribution from brominated DBPs, water treatment processes need to be optimised for either bromide removal or the removal of aliphatic, small MW fractions of NOM, in order to meet DBP guidelines and regulations.

Enhanced removal of manganese in organic-rich surface water by combined sodium hypochlorite and potassium permanganate during drinking water treatment

RSC Advances ◽  
2015 ◽  
Vol 5 (35) ◽  
pp. 27970-27977 ◽  
Author(s):  
Wenzheng Yu ◽  
Luiza Campos ◽  
Tong Shi ◽  
Guibai Li ◽  
Nigel Graham
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Surface Water ◽  
Potassium Permanganate ◽  
Sodium Hypochlorite ◽  
Drinking Water Treatment ◽  
High Concentration

Combination of KMnO4and NaClO is beneficial and synergistic for removing Mn2+in water with high concentration of organic matter.

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