In the Rocky Mountains, there is uncertainty about the source areas and emission types that contribute to nitrate (NO3) deposition, which can adversely affect sensitive aquatic habitats of high-elevation watersheds. Regional patterns in NO3 deposition sources were evaluated using NO3 isotopes in five National Parks, including 37 lakes and 7 precipitation sites. Results indicate that lake NO3 ra...

Two types of ammonium uranyl nitrate (NH4)2UO2(NO3)4·2H2O and NH4UO2(NO3)3, were thermally decomposed and reduced in a TG-DTA unit in nitrogen, air, and hydrogen atmospheres. Various intermediate phases produced by the thermal decomposition and reduction process were investigated by an X-ray diffraction analysis and a TG/DTA analysis. Both (NH4)2UO2(NO3)4·2H2O and NH4UO2(NO3)3 decomposed to amo...

A pilot scale field trial for a novel metal removal technology in the treatment of mine waters was performed using mine water from White Tip, part of the former Snailbeach lead mine in Shropshire, United Kingdom (UK). The water is circum-neutral pH and contains elevated zinc (Zn), cadmium (Cd) and lead (Pb). The novel treatment process is based on ion exchange (IE) using a bespoke mesh in a rot...

The fertigation response of sugar mill effluent doses namely: 5%, 10%, 25%, 50%, 75% and 100% on Abelmoschus esculentus (var. IHR 31) in two different seasons, that is, rainy (Kharif) and summer (Zaid) seasons was investigated. The study revealed that fertigant had significant (P<0.01) effect on moisture content, EC, pH, Cl , OC, HCO3 , CO3 -2 , Na + , K + , Ca 2+ , Mg 2+ , Fe 2+ , TKN, NO3 2, ...

in iraq, waste generation was increased after 2003 war events due to intensepopulation developmentand economic growth. the limitation of designable system for municipal solidwaste (msw) management led toserious problems regarding environment and human health. sanitary landfill in the south of kirkuk is the first kindof effective system for municipal solid waste management in iraq. in the first ...

a comprehensive study on the chemical composition of rainwater was carried out in obuasi, a gold mining town in ghana. rainwater samples were analyzed for major ions (ca2+,mg2+, k+, na+, nh4+, cl-, no3- and so4 2-) and trace metals (fe, al, zn, pb, cr, and cd). the rainwater was typically acidic with a mean ph of 4.76±0.47, which ranged from 4.0 to 5.6. the low ph found in the water suggests t...

Hydrothermal reactions of a lead(II) salt with 3-aminopyrazine-2-carboxylic acid (HL1) gave rise to a series of lead(II) coordination compounds (1–6) having zero, one, two and three dimensional structures. X-ray diffraction structural analyses reveal that complexes [Pb(L1)2]2 (1) and [Pb(L1)(OCHNH2)(η-OCHO)]2 (2) possess dinuclear structures, containing a centre of symmetry. Complexes [Pb2(L1)4...

To explore the contributions of chemical components in particulate matter Lhasa, size distribution characteristics components, such as carbonaceous species (organic carbon, OC; elemental EC), water-soluble ions (NH4+, Cl−, SO42−, and NO3−) trace elements (Na, Ca, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, K, Mg, Pb), were investigated from August 2018 to May 2019. Principal component analysis (PCA) was...

The second-generation poly(ethylene imine) dendrimer (L), based on ammonia as the initiating core molecule, forms anion and ion-pair complexes in aqueous solution. Speciation of the complex species formed and determination of the relevant stability constants were performed by means of potentiometric titration in a 0.10 M NMe4Cl solution at 298.1 K. Protonated forms of L interact with NO3(-), SO...