Determination of NH<sub>4</sub><sup>+</sup> in Environmental Water with Interfering Substances Using the Modified Nessler Method

Jeong, Hyun‐Ja; Park, Jong-Taek; Kim, Hyunook

doi:10.1155/2013/359217

Cited by 94 publications

(43 citation statements)

References 16 publications

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“…Sulfide concentration was determined by comparing results to standard curve developed with Na 2 S standards. At the same time, the concentration of ammonia in a water sample exposed to the bacterial VMPs for 24 h was measured using modifying Nessler method according to Jeong et al . The absorbance of the samples was measured at 400 nm and compared to standard curve developed with NH 4 Cl.…”

Section: Methodsmentioning

confidence: 99%

Metal transformation as a strategy for bacterial detoxification of heavy metals

2017

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Microorganisms can modify the chemical and physical characters of metals leading to an alteration in their speciation, mobility, and toxicity. Aqueous heavy metals solutions (Hg, Cd, Pb, Ag, Cu, and Zn) were treated with the volatile metabolic products (VMPs) of Escherichia coli Z3 for 24 h using aerobic bioreactor. The effect of the metals treated with VMPs in comparison to the untreated metals on the growth of E. coli S1 and Staphylococcus aureus S2 (local isolates) was examined. Moreover, the toxic properties of the treated and untreated metals were monitored using minimum inhibitory concentration assay. A marked reduction of the treated metals toxicity was recorded in comparison to the untreated metals. Scanning electron microscopy and energy dispersive X-ray analysis revealed the formation of metal particles in the treated metal solutions. In addition to heavy metals at variable ratios, these particles consisted of carbon, oxygen, sulfur, nitrogen elements. The inhibition of metal toxicity was attributed to the existence of ammonia, hydrogen sulfide, and carbon dioxide in the VMPs of E. coli Z3 culture that might responsible for the transformation of soluble metal ions into metal complexes. This study clarified the capability of E. coli Z3 for indirect detoxification of heavy metals via the immobilization of metal ions into biologically unavailable species.

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Section: Methodsmentioning

confidence: 99%

Metal transformation as a strategy for bacterial detoxification of heavy metals

2017

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“…Organic C and N were measured using a Perkin -Elmer series II 2400 C and N analyzer. Determination of % N-NH 4 was done by Nessler (Jeong et al, 2013). Colors were defined based on the Munsell Soil Chart, 1975 (Viscarra et al, 2006).…”

Section: Soils Biosolids and Their Mixtures Analysismentioning

confidence: 99%

Acid soil amended in contaminated conditions. Effect on cultivated lettuces (Lactuca sativa var. longifolia)

García

2019

Emir J Food Agric

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The waste amendment is a common practice to improve crop production on acid soils. This work aims to study the effectiveness of water potabilization plant sludge and lamb manure in acid soils remediation and the possible absorption of metals in cultivated lettuces, as well as the elements´distribution in roots and leaves after extra-contaminated irrigation. Al2(SO4)3-stabilized sludge, and lamb manure was added to an acid soil collected from Huasca de Ocampo, Hidalgo State, Mexico. The sludge (L), manure (M), control soil (C), unamended (S) and amended soils (SML) were characterized, and the metals´ concentrations determined. The SML was prepared by adding 2.62 % M and 5.25% L to fill up 600 L tanks. Lettuces (Lactuca sativa var. longifolia) seeds were sown in S and SML, and irrigated once by metal salts solution (Na, Mg, Ca, Fe, Ni, Cu, Zn, and Cd as sulfates, 200 mg kg-1 each). Lettuce germinated and grew satisfactorily in the SML, but they grew slowly in the unamended acid S, and the roots were affected. Leaves and roots were regularly analyzed along three months, and the metal concentrations showed higher values in S than the ones in SML. Pollutants were available from S, as they were present in roots, and desorbed after 40 days. The elements were present in higher concentrations in lettuce roots than in leaves, as expected. Conclusions. a) Acid soils can be amended with potabilization plants wastes in mining zones, but pH must be controlled to prevent the availability of metals. b) The soil texture was the principal cause of infertility due to root damage, and wastes eliminate the impairment. c) The element concentrations present in the leaves were acceptable for human nutrition.

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“…However, nitrite is unstable in the environment and exists at a relatively low concentration in wastewater, limiting the anammox reaction [6,7]. It has been frequently reported that sulfur-based autotrophic denitrification (SAD) can provide nitrite for anammox through the conversion of nitrate into nitrite [8].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Adjusting the S2O32−/NO3− Ratio to Adapt to Dynamic Influents in Coupled Anammox and Denitrification Systems

Hou

Cheng

Wang

et al. 2020

IJERPH

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In this study, anammox, sulfur-based autotrophic denitrification, and heterotrophic denitrification (A/SAD/HD) were coupled in an expanded granular sludge bed (EGSB) reactor to explore the feasibility of enhancing denitrification performance by adjusting the S2O32−/NO3− (S/N) ratio to accommodate dynamic influents. The results indicated that the optimal influent conditions occurred when the conversion efficiency of ammonium (CEA) was 55%, the S/N ratio was 1.24, and the chemical oxygen demand (COD) was 50 mg/L, which resulted in a total nitrogen removal efficiency (NRE) of 95.0% ± 0.5%. The S/N ratio regulation strategy was feasible when the influent COD concentration was less than 100 mg/L and the CEA was between 57% and 63%. Characterization by 16S rRNA sequencing showed that Candidatus Jettenia might have contributed the most to anammox, while Thiobacillus and Denitratisoma were the dominant taxa related to denitrification. The findings of this study provide insights into the effects of CEA and COD on the performance of the A/SAD/HD system and the feasibility of the S/N ratio regulation strategy.

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Determination of NH₄⁺ in Environmental Water with Interfering Substances Using the Modified Nessler Method

Cited by 94 publications

References 16 publications

Metal transformation as a strategy for bacterial detoxification of heavy metals

Metal transformation as a strategy for bacterial detoxification of heavy metals

Acid soil amended in contaminated conditions. Effect on cultivated lettuces (Lactuca sativa var. longifolia)

Feasibility of Adjusting the S2O32−/NO3− Ratio to Adapt to Dynamic Influents in Coupled Anammox and Denitrification Systems

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Determination of NH4+ in Environmental Water with Interfering Substances Using the Modified Nessler Method

Cited by 94 publications

References 16 publications

Metal transformation as a strategy for bacterial detoxification of heavy metals

Metal transformation as a strategy for bacterial detoxification of heavy metals

Acid soil amended in contaminated conditions. Effect on cultivated lettuces (Lactuca sativa var. longifolia)

Feasibility of Adjusting the S2O32−/NO3− Ratio to Adapt to Dynamic Influents in Coupled Anammox and Denitrification Systems

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Determination of NH₄⁺ in Environmental Water with Interfering Substances Using the Modified Nessler Method