Effect of chlorate on nitrification in longan plantation soil

Sutigoolabud, Pathipan; Mizuno, Takafumi; Ongprasert, Somchai; Karita, Shuichi; Takahashi, Toru; Obata, Hitoshi; Senoo, Keishi

doi:10.1111/j.1747-0765.2008.00260.x

Cited by 4 publications

(4 citation statements)

References 12 publications

(19 reference statements)

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“…To determine OURs for autotrophic AOB, NOB, and heterotrophic microorganisms, selective inhibitors (allylthiourea, ATU; − NaClO 3 , ) were added sequentially . Total OUR (OUR t ) was determined in the absence of added inhibitors after adjusting initial NH 4 + –N concentration to 1500 mg/L (20 mL stock at 22.5 g of NH 4 + –N/L).…”

Section: Methodsmentioning

confidence: 99%

Robust Nitritation of Anaerobic Digester Centrate Using Dual Stressors and Timed Alkali Additions

Yao

Wang

Criddle

2021

Environ. Sci. Technol.

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Nitrogen is commonly removed from wastewater by nitrification to nitrate followed by nitrate reduction to N2. Shortcut N removal saves energy by limiting ammonia oxidation to nitrite, but nitrite accumulation can be unstable. We hypothesized that repeated short-term exposures of ammonia-oxidizing communities to free ammonia (FA) and free nitrous acid (FNA) would stabilize nitritation by selecting against nitrite-oxidizing bacteria (NOB). Accordingly, we evaluated ammonium oxidation of anaerobic digester centrate in two bench-scale sequencing batch reactors (SBRs), seeded with the same inoculum and operated identically but with differing pH-control strategies. A single stressor SBR (SS/SBR) using pH set-point control produced HNO3, while a dual stressor SBR (DS/SBR) using timed alkalinity addition (TAA) produced HNO2 (ammonium removal efficiency of 97 ± 2%; nitrite accumulation ratio of 98 ± 1%). The TAA protocol was developed during an adaptation period with continuous pH monitoring. After adaptation, automated TAA enabled stable nitritation without set-point control. In the SS/SBR, repeatedly exposing the community to FA (8–10 h/exposure, one exposure/cycle) selected for FA-tolerant ammonia-oxidizing bacteria (Nitrosomonas sp. NM107) and NOB (Nitrobacter sp.). In the DS/SBR, repeatedly exposing the community to FA (2–4 h/exposure, three exposures/cycle) and FNA (4–6 h/exposure, two exposures/cycle) selected for FA- and FNA-resistant AOB (Nitrosomonas IWT514) and against NOB, stabilizing nitritation.

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Section: Methodsmentioning

confidence: 99%

Robust Nitritation of Anaerobic Digester Centrate Using Dual Stressors and Timed Alkali Additions

Yao

Wang

Criddle

2021

Environ. Sci. Technol.

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“…ClO 3 – is also a common byproduct from drinking water disinfection using NaClO or ClO 2 and wastewater treatment with electrochemical , or photochemical processes. , Upon entering the environment, ClO 3 – can adversely affect ecosystems. For instance, it exhibits high toxicity toward specific algal species in aquatic environments and can potentially suppress the nitrification process in soil . Human exposure to ClO 3 – through drinking water, dairy supply chain, and agricultural products can lead to various health effects, including thyroid dysfunction and methemoglobinemia .…”

Section: Introductionmentioning

confidence: 99%

“…For instance, it exhibits high toxicity toward specific algal species in aquatic environments 7 and can potentially suppress the nitrification process in soil. 8 Human exposure to ClO 3 − through drinking water, dairy supply chain, and agricultural products can lead to various health effects, including thyroid dysfunction and methemoglobinemia. 9 The World Health Organization, 10 European Union (EU), 11 and China 12 have established the drinking water limit of 0.7 mg L −1 for ClO 3 − , while the United States has set a health reference level of 0.21 mg L −1 , with a minimum reporting level of 0.02 mg L −1 .…”

Section: ■ Introductionmentioning

confidence: 99%

Enhancing Aqueous Chlorate Reduction Using Vanadium Redox Cycles and pH Control

Gao,

Chen,

et al. 2023

Environ. Sci. Technol.

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Chlorate (ClO 3 − ) is a toxic oxyanion pollutant from industrial wastes, agricultural applications, drinking water disinfection, and wastewater treatment. Catalytic reduction of ClO 3 − using palladium (Pd) nanoparticle catalysts exhibited sluggish kinetics. This work demonstrates an 18-fold activity enhancement by integrating earth-abundant vanadium (V) into the common Pd/ C catalyst. X-ray photoelectron spectroscopy and electrochemical studies indicated that V V and V IV precursors are reduced to V III in the aqueous phase (rather than immobilized on the carbon support) by Pd-activated H 2 . The V III/IV redox cycle is the predominant mechanism for the ClO 3 − reduction. Further reduction of chlorine intermediates to Cl − could proceed via V III/IV and V IV/V redox cycles or direct reduction by Pd/C. To capture the potentially toxic V metal from the treated solution, we adjusted the pH from 3 to 8 after the reaction, which completely immobilized V III onto Pd/C for catalyst recycling. The enhanced performance of reductive catalysis using a Group 5 metal adds to the diversity of transition metals (e.g., Cr, Mo, Re, Fe, and Ru in Groups 6−8) for water pollutant treatment via various unique mechanisms.

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“…However, the drawbacks of using potassium chlorate include the risk of combustion, lack of availability, and associated difficulties with transport and storage (Matsumoto et al 2007b). Its negative effects on the environment include the inhibition of nitrification (Sutigoolabud et al 2008) and groundwater pollution (Sutigoolabud et al 2004). This coincided with the period of climate change from 1909 to 2020, during which this study investigated the relationship between climate change and longan yield.…”

Section: Introductionmentioning

confidence: 99%

Influence of warming climate and the green revolution on the optimum range of weather parameters of longan yield in Taiwan since 1909

Lai

2022

Theor Appl Climatol

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Longans are the fruits of a subtropical evergreen tree (Dimocarpus longan Lour.) and are widely distributed in Southern China and Southeast Asia. However, there is a lack of historical records of these fruits. In addition to air temperature, other factors, such as the green revolution effect (GRE), sunshine duration, flower bud differentiation, flowering, and production period, may also be important for longan yield. This study incorporated Duncan’s multiple range tests, linear regression models, and multi-regression models, using the forward stepwise method. The results showed that a warming climate was unfavourable to the longan fruits yield (LFY), as the mean negative impact of climate change on LFY was 2489.6 ± 1072.2 kg/ha (mean difference ± 95% CI) under GRE. When considering warming climate and GRE, the results showed that, at the time of flower bud differentiation, the optimum ranges of mean air temperature and relative humidity (RH) were 18.0–19.4 °C and 73.9–75.7%, respectively; during flowering, the optimum ranges of cloud cover, sunshine-hour, and rainy days were 6.8–7.3 oktas, 381.3–476.6 h, and 28.9–41.9 days, respectively; during the production period, the optimum ranges of mean diurnal temperature and RH were 6.8–7.4 °C and 75.1–79.4% respectively. A smaller optimum range of weather parameters aids in a greater slope of the accumulated frequency of the LFY. The GRE and small optimum ranges of weather (stable weather conditions) were found to assist in ensuring stable LFY.

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Effect of chlorate on nitrification in longan plantation soil

Cited by 4 publications

References 12 publications

Robust Nitritation of Anaerobic Digester Centrate Using Dual Stressors and Timed Alkali Additions

Robust Nitritation of Anaerobic Digester Centrate Using Dual Stressors and Timed Alkali Additions

Enhancing Aqueous Chlorate Reduction Using Vanadium Redox Cycles and pH Control

Influence of warming climate and the green revolution on the optimum range of weather parameters of longan yield in Taiwan since 1909

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