Characteristics of dissolved organic nitrogen (DON) in the surface water of Beijing Olympic Forest Park

Huo, Shouliang; Yu, Honglei; Xi, Beidou; Zan, Fengyu; Zhu, Chaowei; Zhang, Jingtian

doi:10.1007/s12665-013-2785-1

Cited by 13 publications

(6 citation statements)

References 27 publications

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“…proposed that DON could be measured precisely after applying the nanofiltration (NF) pretreatment method. NF270 (Dow/Filmtec, USA) was employed in this study because of its better performance in reducing DIN/TDN ratios and retaining DON (about 80 %), compared with NF90 in previous study (Huo et al 2014).…”

Section: Analytical Proceduresmentioning

confidence: 99%

Dissolved organic nitrogen (DON) in seventeen shallow lakes of Eastern China

et al. 2015

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The terrestrial export of dissolved organic nitrogen (DON) is associated with climate, geography and land use, and thus is influenced by geo-climatic variability, human interference, the farmland and woodland in soil, and hydrological connection levels to rivers. A dataset was presented including two catchments covering the major land use types and different hydrological connection levels to rivers within Eastern China: Middle Yangtze (river-isolated lakes) and Huai River (non-river-connected lakes). Total dissolved nitrogen [TDN, including DON and dissolved inorganic nitrogen (DIN)], total organic carbon (TOC) and physical variables (T, DO, pH, OPR, conductivity) were measured in seventeen lakes over summer and winter. In all study lakes, both DON and NH 4 ? -N were the major fractions of TDN, with much lower proportions of NO 3 --N and NO 2 -N. A variation pattern with higher DON and lower NH 4 ? -N concentrations was observed in non-river-connected lakes, and yet reverse pattern in river-isolated lakes. Higher DON concentrations were recorded with a high extent of farmland in land use, reflecting the influence of human impact on DON loads. These relationships and correlation analysis indicated that DON concentrations were controlled by several factors including temperature, latitude, precipitation, hydrological process and farmland cover in land use. Seasonal variations showed that higher mean surface DON concentration (0.004-0.666 mg/L) was measured in winter, which might be due to resuspension of the organic matter from bottom sediments. The uptake of DON by phytoplankton and bacteria was likely to be the most significant reason for low DON concentrations (0.006-0.335 mg/L) during the summer, supported by increasing DON concentrations accompanied with disappearing Chla after phytoplankton died. Much higher NO 3 --N concentrations in summer were attributed to nitrogenous fertilizer, high rainfall, and inorganic nitrogen suspending brought by frequent wind wave.

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Section: Analytical Proceduresmentioning

confidence: 99%

Dissolved organic nitrogen (DON) in seventeen shallow lakes of Eastern China

et al. 2015

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“…Cases of severe nitrogen pollution include the Ain River in France (Frossard et al 2014) and Bagsvaerd Lake in Denmark (Zhang and Angelidaki 2012). In China, Dianchi Lake suffers from extreme eutrophication caused by excessive nitrogen input (Zhou et al 2014;Huo et al 2014). Wang et al (2009) reported that the total nitrogen (T-N) contents in Dianchi Lake increased by 9 times in the past 25 years.…”

Section: Introductionmentioning

confidence: 99%

Study of nitrogen removal performance in pilot-scale multi-stage vermi-biofilter: operating conditions impacts and nitrogen speciation transformation

et al. 2015

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The present work investigates pollutant removal and the transformation of nitrogen from sewage wastewater using a pilot-scale multi-stage bio-vermifilter system. Over a study period of 48 weeks, the pollutant removal performance of the system was measured and the effects of hydraulic loading rate (HLR) and dry-wet ratio (D/W) were estimated. The relationship between oxygen transfer rate and load of oxygen necessity was calculated and analysed for system optimisation. The method for diluting the isotope d 15 N-NO 3 -was applied to study nitrogen transfer. Moreover, statistical correlations were analysed to determine the crucial factors which influence nitrogen transfer efficiency. The system removes pollutants efficiently; specifically, the average removal efficiencies are 94.2 % for chemical oxygen demand (COD), 93.3 % for NH 4 ? -N, and 58.2 % for total nitrogen (T-N). Lowering HLR and D/W can enhance nitrogen removal. Nitrogen speciation and transformation were examined under an optimised condition with an HLR of 0.36 m day -1 and a D/W of 3. The results of isotope d 15 N-NO 3 -dilution showed that NO 3 --N was mainly produced in trickling bio-filter and vermibio-filter (VBF)

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“…The focus of this research is Beijing Olympic Forest Park of China (BOFP), covering an area of approximately 680 square hectometers (Huo et al, 2014). As an area for tourism and recreation BOFP has easy access locating along the Beijing Subway and requires no admission fee.…”

Section: Data Collection and Sample Profilementioning

confidence: 99%

Fostering visitors’ pro-environmental behaviour in an urban park

Zhang

Moyle

Jin

2018

Asia Pacific Journal of Tourism Research

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Recognizing the increasing importance of sustainable environment, this research explored visitors' pro-environmental decision-making process in an urban park context. This study investigated the relationships among attitudes, subjective norms, perceived behaviour control, positive and negative anticipated emotions as well as behavioural intentions. The results suggest that positive anticipated affects positively influenced low effort and high effort pro-environmental behavioural intentions. In addition, positive anticipated affects mediated the relationship between cognitive factors and behavioural intentions. Interestingly negative anticipated affects did not influence behavioural intentions. Further analysis revealed subjective norm was the strongest predictor of intentions, especially the low effort pro-environmental behavioural intentions. The research advances the conceptual understanding of the role of each construct in generating park visitors' intentions to perform environmentally responsible behaviours while visiting an urban park.

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Characteristics of dissolved organic nitrogen (DON) in the surface water of Beijing Olympic Forest Park

Cited by 13 publications

References 27 publications

Dissolved organic nitrogen (DON) in seventeen shallow lakes of Eastern China

Dissolved organic nitrogen (DON) in seventeen shallow lakes of Eastern China

Study of nitrogen removal performance in pilot-scale multi-stage vermi-biofilter: operating conditions impacts and nitrogen speciation transformation

Fostering visitors’ pro-environmental behaviour in an urban park

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