Huan Chen

Huan Chen
Clemson University | CU · Department of Environmental Engineering and Earth Science

B.E. & M.S. & Ph.D. in Environ. Eng.; M.S. in Stat.
Looking for potential collaborators and a new position.

About

44
Publications
7,251
Reads
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670
Citations
Citations since 2016
43 Research Items
650 Citations
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
Additional affiliations
August 2013 - December 2016
University of Tennessee
Position
  • PhD Student

Publications

Publications (44)
Article
Microbial co-hosts of nitrate reduction genes (NRGs) and antibiotic resistance genes (ARGs) have been recently reported, but their ecology and biochemical role in urban waterways remain largely unknown. Here, we collected 29 surface water and 29 sediment samples in the Huangshui River on the Qinghai-Tibet Plateau during the wet and dry season, and...
Article
High-intensity wildfires alter the chemical composition of organic matter, which is expected to be distinctly different from low-intensity prescribed fires. Herein, we used pyrolysis gas chromatography/mass spectrometry (Py-GC/ MS), in conjunction with solid-state 13 C nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectros...
Article
Mercury (Hg) is a ubiquitous contaminant in the environment and its methylated form, methylmercury (MeHg), poses a worldwide health concern for humans and wildlife, primarily through fish consumption. Global production of forest fire ash, derived from wildfires and prescribed burns, is rapidly increasing due to a warming climate, but their interact...
Article
Full-text available
Recently, ClO2‐based oxidation has attracted increasing attention to micropollutant abatement, due to high oxidation potential, low disinfection byproduct (DBPs) formation, and easy technical implementation. However, the kinetics, reactive sites, activation methods, and degradation pathways involved are not fully understood. Therefore, we reviewed...
Article
Vegetable crops have varied heavy metal(loid)s accumulation rates from soils to their edible tissues. However, crop selection has been seldom evaluated as a strategy for reducing the health risks of ingesting vegetables grown in soils contaminated by treated wastewater (TWW) irrigation. We cultivated twenty commonly grown vegetables using soils wit...
Article
Image-based automatic detection systems illustrate the efficient capability of the pest (e.g., sugarcane aphids) identification. However, most of the algorithms were developed using the images captured under stable light conditions and the natural illumination has been rarely considered. Here, we developed a fusion superpixel method and compared it...
Article
Sunlight plays an important role in the photochemical processes of chromophoric dissolved organic matter (CDOM), which is closely related to water self-purification and primary productivity of healthy aquatic ecosystem health. The fine particles of haze, a widespread air pollutant, absorb natural ultraviolet (UV) irradiation and have an unknown deg...
Article
Though metal resistance genes (MRGs) are of global concern in aquatic ecosystems, the underlying factors responsible for MRGs dissemination, especially in urban rivers on the vulnerable Qinghai-Tibet Plateau, are rarely known. Here, we collected 64 samples including water and sediments during the wet and dry seasons and effluents from six wastewate...
Article
Forested land plays an essential role in water supply across the United States (US). Smoldering commonly existing in wildfires contributes significantly to biomass consumption and gas emission, but its influence on source water quality has been rarely studied. Here, we investigated the impact of smoldering temperature (i.e., no burn, 250, 400, and...
Article
Soil contamination and crop risks of heavy metal(loid)s are widely reported after the long-term irrigation of treated wastewater, causing the adverse influence on agricultural sustainability. Here, we collected soils after 50 years of wastewater irrigation to cultivate cabbage (Brassica pekinensis L.), rape (Brassica chinensis L.), carrots (Daucus...
Article
Full-text available
Microplastics (MPs) are widespread in natural ecosystems and have attracted considerable attention from scientists all over the world because they are believed to threaten every life form. In addition to their potential physical and chemical effects on organisms, MPs may act as a carrier for transferring many micropollutants including antibiotics,...
Article
Waste-to-energy is a promising approach for environmental sustainability. We examined the usage of watermelon rind waste coupled with nitrite-containing wastewater for electricity production in a membraneless biocathode microbial fuel cell (MB-MFC). Results showed that the maximum voltage output with internal nitrite circulation in a fed-batch mode...
Article
Copper-based algaecides are usually used for controlling algae bloom triggered by the elevated levels of nutrients after wildfires, resulting in the promoted reactivity of dissolved organic matter (DOM) in forming disinfectant byproducts (DBPs). To identify the best strategy for handling this source water, we employed Fourier transform ion cyclotro...
Article
Severe wildfires combust most above ground vegetation and detritus layers, altering the content and chemical composition of soil organic matter (SOM). To evaluate the lasting effects of wildfire on SOM and the recovery of burned soils, we sampled surface (Oa horizon) and mineral soils (0−5 and 5−15 cm depths) in unburned areas and areas burned at m...
Article
Full-text available
While impervious surface expands with global urbanization, understanding the quality and quantity changes of soil organic carbon (SOC) under impervious surfaces is essential to assess the impacts of urbanization on the SOC pool and cycling. By comparing soils under impervious surfaces with surface and subsurface soils from adjoining open areas, we...
Article
Full-text available
Decomposing foliar litter organic matter (LOM) in forested watersheds is an essential terrestrial source of dissolved organic matter (DOM) to aquatic ecosystems. To evaluate the relationship of chemical composition between LOM and DOM, we collected freshly fallen leaves of white oak (Quercus alba) and conducted an 80-week field decomposition experi...
Article
Wildfire could alter both the quantity and composition of terrestrial organic matter exported into source water, and water treatability of fire-impacted dissolved organic matter (DOM) could be different from its unburned counterpart. Currently, there is no standard protocol to treat wildfire-impacted source water. To identify the best treatment pra...
Article
Foliar litter is an important terrestrial source of dissolved organic matter (DOM) and disinfection byproducts (DBPs) in the source water supply. Climate changes could alter precipitation patterns and hydroperiods in woody wetlands, resulting in a hydrologic shift along the low elevation gradient and change the productions of DOC and DBP precursors...
Article
Full-text available
Disinfection processes might alter the chemical structure of biological recalcitrant natural organic matter (NOM) in source water to form assimilable organic carbon (AOC), which can be readily utilized by microbes for growth. However, AOC has not been classified as disinfection byproducts (DBPs) before and little is known about the chemical and str...
Article
The frequency of Atlantic hurricanes has been predicted to increase significantly by the end of this century. Watershed disturbance initiated by hurricanes can alter dissolved organic matter (DOM) quantity and quality in source water dramatically. DOM is an important disinfection by-product (DBP) precursor, and thus hurricanes can have a significan...
Article
The image segmentation technique is a vital component of vision-based fruit harvesting robots because the accuracy of this technique greatly affects the recognition and identification by robots. However, the uncertainty and ambiguity of natural scenes in orchards make image segmentation a challenging task. Here, we developed a new algorithm to dete...
Article
Full-text available
More than half of the drinking water supply in the United States originates from forest watersheds, where terrestrial dissolved organic matter (DOM) is an important disinfection byproduct (DBP) precursor. Throughfall-derived DOM, a significant contributor of terrestrial DOM, has seldom been evaluated for its formation potential of DBPs. Here, we co...
Article
Elevated levels of nutrients due to wildfire ash input into stream waters will likely cause algal blooms. When source water is impeded by algae and requires immediate restoration, copper algaecides are usually applied. Previous studies indicate that Cu ²⁺ can promote reactivity of dissolved organic matter in forming disinfection byproducts (DBPs)....
Article
Carbon mitigation strategies have been developed without sufficient consideration of their impacts on the water system. Here, our study evaluates whether carbon mitigation strategies would decrease or increase local industrial water use and water-related pollutants discharge by using a computable general equilibrium (CGE) model coupled with a water...
Article
Full-text available
Watershed management practices such as prescribed fire, harvesting and understory mastication can alter the chemical composition and thickness of forest detritus, thus affecting the quantity and quality of riverine dissolved organic matter (DOM). Long-term effects of watershed management on DOM composition were examined through parallel field and e...
Article
Watershed management practices such as prescribed fire, harvesting and understory mastication can alter the chemical composition and thickness of forest detritus, thus affecting the quantity and quality of riverine dissolved organic matter (DOM). Long-term effects of watershed management on DOM composition were examined through parallel field and e...
Cover Page
Full-text available
The 2013 Rim Fire in California altered the landscape and generated a vast amount of polycyclic aromatic hydrocarbons in the ashes and soils. Photo credit: Jun-Jian Wang.
Article
Wildfires are expected to become more frequent and intensive at the global scale due to climate change. Many studies have focused on the loss of mercury (Hg) from burned forests; however, little is known about the origins, concentration, reactivity, and bioavailability of Hg in residual ash materials in postfire landscapes. We examine Hg levels and...
Article
Subaqueous wetland sediments (SWSs) and banana peels (BPs), respectively used as anaerobic inoculums and raw materials, were valorized for electricity generation in membrane-less and biocathode-containing microbial fuel cells (MLBC-MFCs). The maximum current density was 78.2 mA/m 2 for banana peel extracts (BPE) and 91.3 mA/m 2 for anaerobically fe...
Article
Energy and water systems are interdependent and have complex dynamic interactions with the socioeconomic system and climate change. Few tools exist to aid decision-making regarding the management of water and energy resources at a watershed level. In this study, a Computable General Equilibrium (CGE) model and System Dynamics and Water Environmenta...
Article
Full-text available
Wildfire-altered soil may be an important source of polycyclic aromatic hydrocarbons (PAHs) in the environment. With projected increase of wildfire frequency and intensity due to changing global climate, understanding the quantity and speciation of PAHs, including halogenated PAHs (XPAHs), resulting from different burn intensities has important ram...
Article
Wastewater irrigation reduces the pressure on freshwater usage but leads to the accumulation of heavy metal (loid)s in soils. This study investigated heavy metal(loid)s (As, Cr, Cu, Ni, Pb, and Zn) in the acid-soluble (F1), reducible (F2), oxidizable (F3), and residual (F4) fractions of soils from greenhouses and fields in Baiyin City, Gansu, China...
Article
The important role of spatial scale in exploring the geography of poverty as well as its policy implications has been noticed but with limited knowledge. To improve such limited understanding, we mainly investigated the spatial patterns and influencing factors of rural poverty (indicated by poor population and poverty incidence) at three different...
Article
Litter decomposition regulates the cycling of nutrients and toxicants but is poorly studied in farmlands. To understand the unavoidable in-situ decomposition process, we quantified the dynamics of C, H, N, As, Ca, Cd, Cr, Cu, Fe, Hg, K, Mg, Mn, Na, Ni, Pb, and Zn during a 180-d decomposition study in leafy lettuce (Lactuca sativa var. longifoliaf)...
Article
Hydraulic fracturing, coupled with the advances in horizontal drilling, has been used for recovering oil and natural gas from shale formations and has aided in increasing the production of these energy resources. The large volumes of hydraulic fracturing fluids used in this technology contain chemical additives, which may be toxic organics or produ...
Article
Various toxic chemicals used in hydraulic fracturing fluids may influence the inherent health risks associated with these operations. This study investigated the possible occupational inhalation exposures and potential risks related to the volatile organic compounds (VOCs) from chemical storage tanks and flowback pits used in hydraulic fracturing....
Article
Instability of aerobic granular sludge (AGS), which is mainly caused by filamentous outgrowth, is a bottleneck in applying this technology to treat wastewater. In order to reduce the effect of filamentous outgrowth on settlement ability of AGS, the role of the distribution of extracellular polymeric substances (EPS) in settlement ability was invest...

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Projects

Projects (2)
Project
To understand the mercury content, reactivity, and bioavailability in wildfire ash, as well as the ecological impact of ash in mercury biogeochemical cycling.