Che-Jen Lin's research while affiliated with Lamar University and other places

Publications (17)

Article
Full-text available
Assessment of environmental justice (EJ, a concept related to the distributional fairness of environmental risks) is a crucial component in environmental risk management. However, the risks associated with air pollutants and toxins have rarely been evaluated jointly. Therefore, using an approach integrating modeling, data fusion, and health benefit...
Article
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Although electrochemical disinfection has been shown to be an effective approach to inactivate bacteria in saline water, the effects of process parameters and reactor design for its application in low-salinity water have not been well understood. In this study, factorial experiments were performed to investigate the direct and confounded effects of...
Article
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Evasion from soil is the largest source of mercury (Hg) to the atmosphere from terrestrial ecosystems. To improve our understanding of controls and in estimates of forest soil–atmosphere fluxes of total gaseous Hg (TGM), measurements were made using dynamic flux chambers (DFCs) over 130 and 96 d for each of five plots at a subtropical forest and a...
Preprint
Full-text available
Evasion from soil is the largest source of mercury (Hg) to the atmosphere in terrestrial ecosystems. To improve understanding of controls and reduce uncertainty in estimates of forest soil-atmosphere exchange, soil-air total gaseous Hg (TGM) fluxes were measured for 130 and 96 days for each of four plots at a subtropical forest and a temperate fore...
Article
Mercury (Hg) deposition through litterfall has been regarded as the main input of gaseous elemental mercury (Hg0) into forest ecosystems. We hypothesize that earlier studies largely underestimated this sink because the contribution of Hg0 uptake by moss and the downward transport to wood and throughfall is overlooked. To test the hypothesis, we inv...
Article
An urban stormwater retention pond was instrumented with temperature (T) and dissolved oxygen (DO) sensors connected to wireless sensor networks (WSNs) for providing real-time water quality information. The data were applied for developing a one-dimensional (1D), MINLAKE2012 water quality model to simulate the T and DO variation over 3 years, and a...
Article
The performance of electrocoagulation (EC) using iron as sacrificial electrode was investigated at low current densities (0.6–1.9 mA/cm²) for treating a waste stream from a Kraft paper mill. A multi-level factorial design of experiments and response surface methodology (RSM) were applied to quantify the effects of current density and reaction time...
Article
Mercury (Hg) emitted from two circulating fluidized bed (CFB) utility boilers (150 MW, P#1 and 300 MW, P#2) in Guizhou province, Southwest China, was characterized. P#1 used anthracite coal and was equipped with in-furnace desulfurization (IFD) and electrostatic precipitator (ESP). P#2 co-burned gangue and coal slime and was equipped with selective...
Article
The ambient air quality of Guangzhou in 2016 has significantly improved since Guangzhou and its surrounding cities implemented a series of air pollution control measures from 2014 to 2016. This study not only estimated the effects of meteorology and emission control measures on air quality improvement in Guangzhou but also assessed the contribution...
Article
Full-text available
Evasion from soil is the largest source of mercury (Hg) to the atmosphere from terrestrial ecosystems. To reduce the uncertainty in estimates of Hg emissions from forest soils, soil-air total gaseous Hg (TGM) fluxes and vertical profiles of soil pore TGM concentrations were measured simultaneously for 130 days to improve parameterization of emissio...
Article
The Pearl River Delta (PRD), one of the most polluted and populous regions of China, experienced a 28% reduction in fine particulate matter (PM2.5) concentration between 2013 (47 μg/m³) and 2015 (34 μg/m³) under a stringent national policy known as the Air Pollution Prevention and Control Action Plan (hereafter Action Plan). In this study, the heal...
Article
Mercury (Hg) emissions from point sources to air may disperse over long distance depending on Hg speciation in the plume. A significant fraction of Hg, particularly in its divalent forms, deposits locally and causes pollution to surrounding biomes. The objective of this study was to investigate (1) the historic Hg deposition to the immediate vicini...
Article
Smelting of nonferrous metals is an important source of heavy metals in surface soil. The crops/vegetables grown on contaminated soil potentially impose adverse effects on human health. In this study, the contamination level of five heavy metals (Hg, Pb, Zn, Cd and Cu) in ten types of vegetables grown nearby a large scale Pb/Zn smelter in Hunan Pro...
Article
Rice consumption can be a major pathway for mercury (Hg) exposure, which can cause health hazards to Chinese residents. To accurately assess the potential health risks, the bioaccessibility of Hg in rice samples collected at background and Hg-contamination sites was examined using four in vitro methods. The results showed that < 50% of the total me...
Article
Full-text available
This synthesis identifies future research needs in atmospheric mercury science, based on a series of review papers, as well as recent developments in field data collection, modeling analysis, and emission assessments of speciated atmospheric mercury. Research activities are proposed that focus on areas that we consider important. These include refi...
Article
Full-text available
This synthesis identifies future research needs in atmospheric mercury science, based on a series of review papers, as well as recent developments in field data collection, modeling analysis, and emission assessments of speciated atmospheric mercury. Research activities are proposed that focus on areas that we consider important. These include refi...

Citations

... Additionally, we provide information on standard meteorological parameters (including temperature (T), relative humidity (RH), wind speed (WS), and wind direction (WD)) and trace gases (particulate matter (PM), CO, NO 2 , and SO 2 ), since many factors affecting the variability of GEM emissions include T, atmospheric turbulence, and sunlight, among others (Cizdziel et al., 2019;Zhou et al., 2020). Meteorological data and trace gas concentrations were downloaded from the Automated Atmospheric Monitoring Network (Red Automática de Monitoreo Atmosférico (RAMA) and Red de Meteorología y Radiación Solar (REDMET)) available at http:// www. ...
... shrublands, herbaceous uplands, barren, non-natural woody), mercury concentrations were two times greater in forest surface soils. The enrichment of forested soils emphasizes the important role that forest canopies play in mediating mercury deposition through foliar uptake, litterfall and throughfall [31][32][33], and control of re-emissions [34]. In addition to magnitude, forested uplands showed the greatest difference in median concentration between upper and lower soils. ...
... Although data for shallow roots were reported in earlier studies, 3,8 the distribution of the Hg concentration in roots of various sizes has been largely unknown. 12,14 There are also mixed assessments regarding Hg sources in roots. The Hg concentration in global roots is in the range of 2−70 ng g −1 in the remote forest, up to an order of magnitude lower than the Hg concentration in surrounding soils. ...
... On the other hand, raw tannery wastewater removal was optimized and analyzed based on COD, total chrome, and color removal (Deghles and Kurt, 2016), but no energy consumption was analyzed. A recent study stated that current density is the dominant factor for energy consumption and operating costs, compared to electrolysis time and electrode consumption (Wagle et al., 2020). Also, continuous electrocoagulation was analyzed thru RSM with a central composite design, using factors such as initial pH, inlet flow rate, dye initial concentration, and voltage (Hendaoui et al., 2021); others used electrolysis time, current density, NaCl concentration, and mixing intensity (Abbasi et al., 2020). ...
... The location of the WSN is crucial to collect information about an impending flood. It is preferable to place WSNs in ponds which accumulate water rather than in rivers or drains with flowing water [15]. In addition there needs to be a lead time of at least one hour in order for a flood detection system to be useful. ...
... It has the characteristics of a developed economy, advanced technology and convenient transportation (Yi et al., 2021). Yu et al. (2019) showed that the local emission control in Guangzhou contributed more to reducing SO 2 , NO 2 , PM 2.5 , and PM 10 concentrations than the surrounding area emission control. Maoming is located on the coast of the South China Sea, in the Southwest of Guangdong Province, with rapid economic development (Lin and Kim, 2021). ...
... For example, through field investigations, Zheng et al. (2018) found the atmospheric Hg emissions from four ultra-low emission power plants were only 0.4%-14% of total Hg input, which were much lower than figures (64%-78%) in China in middle 1990s when no SO 2 and NO x emission controls for CFPPs (Wang et al., 2000). In Guizhou province, Hg removal efficiency from different air pollution control devices for pulverised coal (PC) furnace power plants averaged 94%, and that from circulating fluidised bed (CFB) utility boilers was 98% in middle 2010s (Tang et al., 2016;Li et al., 2019). For CFB utility boilers, 97%-99% of Hg in the feed coal was ultimately removed into captured fly ash (Li et al., 2019), whereas for 11 of the pulverised CFPPs, 40% of the Hg in the feed coal ended up in the fly ash and 54% in desulfurisation gypsum in Guizhou province after the upgradation of SO 2 , NO x , and particulate emission control devices (Guizhou Environmental Monitoring Center Station and Institute of Geochemistry CAS, 2016). ...
... According to the results for the CW2 plot, which had the common cornewheat rotation pattern in North China Plain, the estimated annual average soileair TGM exchange flux was 5.46 ± 21.69 ng m À2 h À1 , which was 1.71 times higher than that of a forest ecosystem in northern China (Zhou et al., 2019). The difference in TGM flux between cropland and the forest ecosystem in northern China is greater than that for southern China (Fu et al., 2008). ...
... January, April, July, and October (representing winter, spring, summer, and autumn, respectively) were chosen for the simulations to represent overall PM2.5 and O3 concentrations in 2017 and Hg deposition in the typical periods, and spin-up times of 5 and 7 days were determined to offset the effect of the initial condition on concentrations and deposition, respectively. In addition, the simulation results of PM2.5 and O3 were assimilated with the observed data from the national air quality monitoring stations in the PRD region using the downscaler (DS) algorithm in the DF v2.2 developed by our team [38]. It should be noted that Hg was not included in the assimilation process due to the lack of online monitoring data. ...
... As reported by Ballabio et al. (2021) and illustrated in Fig. S3, in Europe there are still 87 hotspots with known mining sites, the most important of which are the Idrija mine in Slovenia (Gosar et al. 2016) the Almadén mine in Spain (Millán et al. 2006) and the Monte Amiata (Rimondi et al. 2015). Even in the case of closure of these activities, re-emission of legacy mercury from soil areas surrounding these mining sites, still represent strong localized emission sources of atmospheric GEM (Ferrara et al. 2000;Zhu et al. 2018). Regarding coal combustion in power plants, as reported by the European Union Office, in 2020 there were 166 coal-fired power plants operating in 18 EU countries, with a total capacity of 112 GW (Kapetaki et al. 2021). ...