Ph # 701-200-5109
Ion imprinted polymer for Removal and Monitoring of Arsenic
Advisor: Achintya Bezbaruah, Ph.D., Assistant Professor, Department of Civil Engineering, North Dakota State University.
Co-Advisor: Bret Chisholm, Ph.D., Senior Research Scientist, Center for Nanoscale Science and Engineering and Adjunct Professor, Polymers and Coatings, North Dakota State University.
Matching Support:North Dakota State University.
Degree Progress:Ph.D. in Environmental Engineering expected in Fall 2010
Arsenic present in water is a serious environmental and health concern because of the toxicity of arsenic on human and on other living organisms. Arsenic usually occurs naturally in groundwater although some arsenic based pesticides and preservatives may also contribute. The U.S. EPA has set 0.010 parts per million (10 µg/L) as the arsenic standard for drinking water in 2006. The maximum contaminant level or MCL of 10 µg/L has created an urgent need of new technology for arsenic removal from water and sensing.
Arsenic is present in water in tri- and penta-valent forms. Different Processes are presently used to remove arsenic. However, most of the conventional arsenic removal processes can not remove As(III) and As(V) simultaneously. They can treat either As(III) or As(V), and, hence, a pretreatment in the form of oxidation or reduction is needed. The need for an additional unit process adds to the capital and operation costs of treatment.
To overcome this limitation it is proposed to synthesize ion-imprinted polymer for the removal of both As(III) and As(V) simultaneously. Cross-linkers will be used in the polymer which can bind both As(III) and As(V) and reduce As(V) to As(III). Hence, arsenic removal could be done in one step. This research will proceed further on to develop sensors with low response time and high arsenic detection efficiency.
Proof-of-concept experiments are in process. Different cross-linkers are being experimented upon to select the best candidates for binding of As(III) and As(V) and reduction of As(V) to As(III).
The outcome from this work will have a universal appeal and will be very relevant to North Dakota. Arsenic contamination is a major concern in southeast North Dakota (568 sq mile area in Sargent, Ransom and Richland counties are affected). The IIP developed will find potential use in large and small water treatment plants including point-of-use treatment units. Ion-imprinted chemical sensor technology will have potential applications in clinical diagnostics, environmental and food analyses as well as in illicit drugs detection, genotoxicity and chemical weapons.
Advisor: Dr. Achintya Bezbaruah,
Assistant Professor of Civil Engineering, North Dakota State Uhiversity, Fargo
Phone: (701) 231-7461
Co-Advisor : Dr. Bret Chisholm
Senior Research Scientist at Center for Nanoscale Science and Engineering
North Dakota State University, Fargo
Phone: (701) 231-5328