Data generated to test nitrification inhibition of chromium. This dataset is associated with the following publication: Kapoor, V., M. Elk, X. Li, C. Impellitteri , and J. Santodomingo. Effects of Cr(III) and CR(VI) on nitrification inhibition as determined by SOUR, function-specific gene expression and 16S rRNA sequence analysis of wastewater nitrifying enrichments. CHEMOSPHERE. Elsevier Science Ltd, New York, NY, USA, 147: 361-367, (2016).

SOUR and qPCR data. This dataset is associated with the following publication: Kapoor, V., M. Elk, and X. Li. Inhibitory effect of cyanide on wastewater nitrification determined using SOUR and RNA-based gene-specific assays. Letters in Applied Microbiology. Blackwell Publishing, Malden, MA, USA, 63(2): 155-161, (2016).

SOUR and qPCR data. This dataset is associated with the following publication: Kapoor, V., M. Elk, and X. Li. Inhibitory effect of cyanide on wastewater nitrification determined using SOUR and RNA-based gene-specific assays. Letters in Applied Microbiology. Blackwell Publishing, Malden, MA, USA, 63(2): 155-161, (2016).

There is no data as no experiments were conducted (literature review). This dataset is associated with the following publication: Li , X., V. Kapoor , C. Impellitteri , and K. Chandran. Measuring nitrification inhibition in wastewater treatment systems: current state of science and fundamental research needs. CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY. CRC Press LLC, Boca Raton, FL, USA, 46(3): 249-289, (2016).

SOUR (oxygen uptake rates) and qPCR for nitrification genes. This dataset is associated with the following publication: Kapoor , V., X. Li , M. Elk , K. Chandran, C. Impellitteri , and J. Santodomingo. Transcriptional and physiological responses of nitrifying bacteria to heavy metal inhibition. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 49: 13454-13462, (2015).

SOUR (oxygen uptake rates) and qPCR for nitrification genes. This dataset is associated with the following publication: Kapoor , V., X. Li , M. Elk , K. Chandran, C. Impellitteri , and J. Santodomingo. Transcriptional and physiological responses of nitrifying bacteria to heavy metal inhibition. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 49: 13454-13462, (2015).

Li et al nitrification inhibition review. This dataset is associated with the following publication: Kapoor, V., X. Li, C. Impellitteri , K. Chandran, and J. Santodomingo. Use of Functional Gene Expression and Respirometry to Study Wastewater Nitrification Activity after Exposure to Low Doses of Copper. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH. Ecomed Verlagsgesellschaft AG, Landsberg, GERMANY, 23(7): 6443-6450, (2016).

Li et al nitrification inhibition review. This dataset is associated with the following publication: Kapoor, V., X. Li, C. Impellitteri , K. Chandran, and J. Santodomingo. Use of Functional Gene Expression and Respirometry to Study Wastewater Nitrification Activity after Exposure to Low Doses of Copper. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH. Ecomed Verlagsgesellschaft AG, Landsberg, GERMANY, 23(7): 6443-6450, (2016).

Nitrapyrin, a nitrification inhibitor, 6-CPA, a nitrapyrin degradate, and three co-applied herbicides (acetochlor, atrazine, and metolachlor) were measured in surface drains from eights sites in Illinois. Water samples were collected from April to June 2017. The compounds studied are applied to corn, Illinois is one of the largest corn producing states in the U.S. Water samples (1-L) were collected in amber glass bottles using a grab or depth weighted approach. Water samples were filtered (0.7 micrometers), extracted via solid phase extraction (Oasis® MAX cartridge), and analyzed (nitrapyrin and herbicides by gas chromatography with mass-spectrometry; 6-CPA by liquid chromatography tandem mass-spectrometry).

Nitrapyrin is a nitrification inhibitor that is co-applied with N-fertilizer in agroecosystems. Over the course of one year (March 2016 to June 2017), 192 water samples from seven streams across Iowa and Illinois were analyzed for nitrapyrin, its degradate 6-chloropicolinic acid (6-CPA), and three widely used herbicides acetochlor, atrazine, and metolachlor. Additional environmental samples were collected and analyzed in spring 2017: 63 water samples from eight subsurface drains, and 33 soil samples from a field in Iowa that received direct application of nitrapyrin (only for nitrapyrin and herbicides). Nitrapyrin was detected in all seven streams (56% detection) with concentrations ranging from 4 to 1,200 ng/L; 6-CPA was detected in six of the seven streams (13% detection) with concentrations ranging from 2 to 13 ng/L. Nitrapyrin was detected in only two of the eight subsurface drains and in 10% of drain samples (10% detection), and with concentrations ranginged from 3 to 12 ng/L; 6-CPA was detected in six of the eight subsurface drains and in (33% of drain samples withdetection), and concentrations ranginged from 2 to 6 ng/L. Nitrapyrin was detected in 67% of the soil samples collected, and concentrations ranged from 0.9 to 42 ng/g. Generally, all three herbicides were detected more frequently and at higher concentrations than nitrapyrin in the streams, subsurface drains, and soils. There are 3 csv datasets related to this data release. Please find in each of the child items the data and metadata.