Toxic contaminants moving along with runoff usually contaminates shrimp farms in most areas of Satkhira district, southwest Bangladesh. An investigation was carried out to assess the Physico-chemical properties and heavy metal concentration sediments water from Bangladesh during December 2020 March 2021. Twelve sediment samples were collected six Ghers two Upazilla e.g., Debhata Assasuni Satkhi...

We conducted NO3 – stable isotope tracer releases in nine streams with varied intensities and types of human impacts in the upstream watershed to measure nitrate (NO3 ) cycling dynamics. Mean ambient NO3 – concentrations of the streams ranged from 0.9 to 21,000 lg l NO3 – N. Major N-transforming processes, including uptake, nitrification, and denitrification, all increased approximately two to ...

The purpose of this study is to determine the quality water samples from Nnewi and Awka areas ascertain their health risk safety for human consumption. In Canadian Council Water Quality Index [CCME WQI] methodology was used borehole, well, rainwater collected towns Anambra. Nine parameters were evaluation, namely: pH, electrical conductivity [EC], nitrates [NO3-], sulphates [SO42-], chlorides [...

In the framework of understanding the transport mechanism that governs the filtration of NO3- solution through a γ-Al2O3 membrane with a nominal pore size of 5 nm at low ultrafiltration, a series of various types of nitrate solutions and operating conditions were investigated. The effect of filtration parameters such as pH, applied pressure and NO3- concentration on the selectivity and permeabi...

The objective of this study was to compare substrate solution nitrogen (N) availability, N immobilization, and nutrient leaching in a pine tree substrate (PTS), peatlite (PL), and aged pine bark (PB) over time under greenhouse conditions. Pine tree substrate was produced from loblolly pine logs (Pinus taeda L.) that were chipped and hammer-milled to a desired particle size. Substrates used in t...

The coordination behaviour of hexakis(3-pyridyloxy)cyclophosphazene (L) towards divalent metal ions is described. The reaction of L with hydrated metal nitrates afforded [{N3P3(O-C5H4N-3)6}2{Zn(H2O)3(NO3)}2{Zn(H2O)2(NO3)}2]n[NO3]2n·4nH2O·nCH3OH (1), [{N3P3(O-C5H4N-3)6}2{Zn(H2O)3(NO3)}2{Cu(NO3)}2]n[NO3]2n·4nH2O·nCH3CN (2), [{N3P3(O-C5H4N-3)6}2{(NO3)Cd-(μ-(NO3)-Cd(NO3)2(μ-(NO3)Cd(NO3)}]n·2nCH3OH·...

Under low growth-irradiance and/or excessive nitrogen (N) fertilization, the roots of leafy vegetables could take up nitrate (NO3) faster than the plant can convert it to organic nitrogen compounds. NO3 is suspected to have carcinogenic effect in human when eaten in high quantity. In this study, lettuce plants were first grown in an aeroponics system with full nutrients (full NO3) under full su...

Microwave cure was used for the quick curing process of fly ash (FA) geopolymer fabrication heavy metal immobilization purposes. The geopolymers synthesized by microwave were applied Pb ion in matrix. Fly raw material and alkaline activator sodium silicate hydroxide (NaOH) solution fixed at mass ratio 2.5 geopolymerization. 0.5 wt% Pb(NO3)2 added to pastes precured 30 °C 2 h carrying out dense ...

High resolution vertical distributions of NO3 and N2O5 through the nocturnal boundary layer S. S. Brown, W. P. Dubé, H. D. Osthoff, D. E. Wolfe, W. M. Angevine, and A. R. Ravishankara NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, USA Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO 80305, USA Department of Chemistry and B...

A nitrate-selective electrode based on a recently synthesized bis(2-hydroxyanil)acetylacetone lead(II) complex [(haacac)Pb] has been developed. Among different compositions studied, a membrane containing 30.7% poly(vinyl chloride) (PVC), 61.3% dibutyl phthalate (DBP) as a plasticizer, 3% methyltrioctylammonium chloride (MTOAC) as a cationic additive and 5% ionophore (all w/w) exhibited the best...