Article
Environmental Sciences
Florence A. O. Udenby, Husein Almuhtaram, Michael J. McKie, Robert C. Andrews
Summary: This study examines the adsorption of organic pollutants by microplastics in freshwater environments and finds that the adsorption is primarily influenced by the size of the microplastic particles, dissolved organic matter, pH, and polymer weathering.
Article
Environmental Sciences
Quan Chen, Yongji Ma, Jihong Dong, Ying Kong, Min Wu
Summary: This study investigates the binding of dissolved black carbon (DBC) with phenanthrene (Phen) through fluorescence quenching experiments. It was found that low concentrations of DBC can complex with high amounts of Phen per unit mass, while no significant difference was observed in the amount of bound Phen per unit amount of DBC at higher concentrations. The dominant mechanisms involved in this binding process include hydrophobic interactions, 7C-7C electron donor-acceptor (EDA), and chemical partition.
Article
Engineering, Environmental
X. Li, J. Wang, J. Lin, W. Yin, Y. Y. Shi, L. Wang, H. B. Xiao, Z. M. Zhong, H. Jiang, Z. H. Shi
Summary: Dissolved carbon concentration is closely related to water quality and aquatic ecosystem productivity in hydrological processes. Storm events have a significant impact on dissolved carbon concentrations, with nonlinear behavior that varies with time scales. This study explores the relationship between dissolved carbon concentration and discharge in an agricultural catchment, identifying different patterns at the inter-event and intra-event scales.
Article
Environmental Sciences
Zuhao Zhu, Huihua Wei, Yao Guan, Li Zhang, Renming Jia, Pengfei Sun, Yang Yang, Zhen Zhang, Qiufeng Zhang
Summary: This study reveals notable spatial and seasonal variations in the concentration, source, and mixing of dissolved organic matter (DOM) at the land-ocean interface. DOM in the northern Beibu Gulf is influenced by river discharge, anthropogenic input, and in situ biological activity. The mixing behavior of DOM varies between nearshore and offshore waters.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Marine & Freshwater Biology
Craig Smeaton, William E. N. Austin
Summary: Coastal waters can act as both sources and sinks of carbon, with coastal sediments trapping and storing significant quantities of carbon and releasing carbon to the atmosphere through biogeochemical processes. Fjords in mid- to high-latitudes are important for the burial and storage of organic carbon in sediments, but the distribution of particulate and dissolved organic carbon in fjord waters is not well understood. This study investigated the factors influencing the spatial distribution of particulate and dissolved organic carbon in four Scottish fjords and found that submarine geomorphology is the primary driver of carbon dispersal in fjord surface waters.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Environmental Sciences
Young Kyoung Song, Jeonghyun Kim, Yong Hwa Oh, Dongjoo Joung, Tae-Hoon Kim
Summary: This study examined the dynamics and sources of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) in the coastal waters off Jeju Island. The results showed significant seasonal variation in DOC and DON concentrations, with higher levels during summer. The Kuroshio Intermediate Water and the Changjiang Diluted Water had the greatest impact during winter and spring, respectively. Microbial activity played a key role in the observed DOM pulse.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Xin Song, Jianwei Dong, Hongbing Wang, Hui Xie, Yue Yu, Le Geng, Zhenwei Yuan, Yongfen Du
Summary: This study compared the characteristics and fate of organic carbon (OC) in four sedimentary environments (mangrove, sandy coast, bay, and estuary) in a coastal area in Guangdong, China. The results showed a large spatial heterogeneity in the concentrations and content of OC. The actual organic carbon storage in the mangrove sedimentary environment was underestimated by 18.2%. Therefore, this study provides new insights for the management and protection of coastline eco-environments and the estimation of carbon stock to adapt to climate change.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Environmental Sciences
Lizhen Liu, Qi Huang, Jian Zhou, Boqiang Qin
Summary: Transparent exopolymer particles (TEP) play a crucial role in the carbon cycle in aquatic environments, but their distribution in large freshwater lakes remains poorly understood. This study focused on the spatial distribution of TEP and dissolved acidic polysaccharides (dAPS) in Lake Taihu, China. The results showed higher concentrations of TEP and dAPS in summer, which were significantly correlated with cyanobacterial blooms. TEP accounted for 24.3% of particulate organic carbon, while dAPS represented 25.9% of dissolved organic carbon.
Article
Environmental Sciences
G. Grandi, E. Bertuzzo
Summary: Quantifying the transfer of organic carbon from terrestrial to riverine ecosystems is crucial for understanding the carbon cycle. This study proposes a modeling framework that combines a transport model with a reactivity continuum approach to predict the flux of dissolved organic carbon from hillslopes to streams and rivers. The model successfully reproduces the streamflow concentrations of dissolved organic carbon and captures the complex relationship between concentration and discharge.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Harikrishna Prasad Mamidala, Dipnarayan Ganguly, Purvaja Ramachandran, Yudhistir Reddy, Arumughan Paneer Selvam, Gurmeet Singh, Kakolee Banerjee, Radhakrishnan Subhadra Robin, Ramesh Ramachandran
Summary: The distribution and sources of particulate organic carbon and nitrogen in mangroves ecosystems along the east and west coast of India were examined. The results showed that water quality in these mangrove waters is influenced by land-based contaminants and the concentration of particulate organic carbon is higher in the east coast.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Luisa Albarano, Ilaria De Rosa, Ilaria Santaniello, Maria Montuori, Sara Serafini, Maria Toscanesi, Marco Trifuoggi, Giusy Lofrano, Marco Guida, Giovanni Libralato
Summary: This research examined the short-term effects (48 hours of exposure) of polycyclic aromatic hydrocarbons (PAHs) mixtures on the nauplii and adult of Artemia franciscana. The study found additive or synergic effects for most PAHs combinations, except for naphthalene + phenanthrene which showed an antagonistic effect. The expression level of five stress-response genes in Artemia was also impacted by the PAHs mixtures.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Zhimin Zhang, Wanyu Zhao, Wei Hu, Junjun Deng, Lujie Ren, Libin Wu, Shuang Chen, Jingjing Meng, Chandra Mouli Pavuluri, Yele Sun, Zifa Wang, Kimitaka Kawamura, Pingqing Fu
Summary: Low molecular weight organic compounds are present in the atmosphere and their concentrations in fresh snow were analyzed in this study. The study found high levels of total dicarboxylic acids in the snow samples, with oxalic acid being the main component. Elevated levels of phthalic acid in snow from certain regions suggest emissions from vehicular exhausts and fossil fuel combustion sources.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Ling Ding, Sen Shan, Chunle Luo, Xuchen Wang
Summary: This study investigated the concentrations and distribution of dissolved organic carbon (DOC) in the South China Sea and the western North Pacific. Laboratory experiments were conducted to determine the microbiological respiration of DOC. The findings revealed that DOC concentrations in the South China Sea varied greatly and were influenced by multiple factors. Physical mixing played a significant role in the distribution of mesopelagic DOC in the northern South China Sea basin.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Forestry
Jianfeng Hou, Fei Li, Zhihui Wang, Xuqing Li, Rui Cao, Wanqin Yang
Summary: Dissolved carbon (DC) in forest streams plays a crucial role in maintaining the structure and productivity of adjoining aquatic ecosystems as well as informing biogeochemical links between mountain forests and adjoining rivers. However, the functions of forest stream DC dynamics are rarely incorporated into river management. This study investigated the seasonal dynamics of DC in 15 representative forest streams in a geographically fragile subalpine-gorge catchment in the upper reaches of the Yangtze River. The results showed that precipitation, temperature, water discharge rate, and sediment depth regulated the stocks and export rates of DC and its components. Forest streams are important links between the carbon biogeochemical cycle of subalpine forests and adjoining streams.
Article
Geosciences, Multidisciplinary
Hewen Niu, Shichang Kang, Chandan Sarangi, Guotao Zhang, Mengxue Chen, Yuzhong Zhang, Huili Qin
Summary: This study systematically determines the organic and inorganic constituents in water bodies of the cryosphere region in the eastern Tibetan Plateau and finds that high-elevation water bodies have lower organic carbon content. Additionally, it suggests that atmospheric deposition and anthropogenic activities contribute to the observed patterns in organic carbon and nitrogen content.
Article
Engineering, Environmental
Xiaoshan Yu, Weishan Liao, Qitang Wu, Zebin Wei, Xianke Lin, Rongliang Qiu, Yangmei Chen
Summary: Cellulose nanocrystals (CNC) were investigated as a green eluent for remediating Cd-contaminated soil. The study focused on exploring the influence of washing conditions on Cd removal efficiency, as well as the effects of CNC remediation on soil health and the possible mechanism. The results showed that CNC concentration, pH value, and contact time significantly affected Cd removal. CNC quickly removed heavy metals in soil within 30 minutes, mainly targeting exchangeable and reducible Cd fractions to reduce bioavailability. CNC washing had no negative effects on seed growth and biodiversity. The functional groups on CNC played important roles in the reaction with soil Cd. Therefore, cellulose nanocrystals had the potential to efficiently remediate heavy metal-contaminated soils in an environmentally friendly manner.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Bo-Fang Yan, Mei-Lin Yan, Xue Xiao, Rong-Liang Qiu, Yuan-Qing Chao, Yin-Xin Li, Su-Lian Lv, Zhong-Xin Tan, Ye-Tao Tang
Summary: This study aims to evaluate the performance of potential plant-amendment systems for in situ phytostabilization. The results show that sorghum combined with 0.5% rice straw biochar performed the best in reducing soil Cd concentration with relatively low cost.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Agronomy
Chong Liu, Ting-Xuan Ding, Wen-Shen Liu, Ye-Tao Tang, Rong-Liang Qiu
Summary: This study demonstrates that phosphorus mediates the migration of rare earth elements in the rhizosphere and the precipitation in the endosphere, thereby regulating the accumulation of rare earth elements in Phytolacca americana.
Article
Engineering, Environmental
Kunyuan Liu, Dongye Zhao, Zhuofeng Hu, Ye Xiao, Chi He, Feng Jiang, Nan Zhao, Chuanfang Zhao, Weixian Zhang, Rongliang Qiu
Summary: This study prepared novel iron carbide loaded N-doped carbon nanotubes at different pyrolysis temperatures and found that unconfined Fe showed better performance in removing Cr(VI) contaminants. The key mechanism of enhanced removal was the reductive precipitation mediated by surface adsorbed and dissolved Fe2+. This study provides new insights into the mechanisms of iron confinement on the removal of metal oxyanions from groundwater and proposes a new strategy for modulating the transformation of nanoparticles from nonconfinement to confinement based on pyrolysis temperature.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Horticulture
Yongqiang Yuan, Dongyun Liu, Xiongfei Huang, Shizhong Wang, Rongliang Qiu, Zezhou Zhang, Jiajia Ming
Summary: Using PGPR to increase Se uptake in crops is a promising approach, but the synergistic effects of changing the concentration of both Se and PGPR on plant growth and Se absorption are rarely studied. In this study, the combined treatments of different Se and PGPR concentrations were used to investigate their effects on pak choi growth and Se accumulation. The results showed that pak choi growth was promoted by 7.65x107 CFU mL-1 EG16 and no more than 1 mg L-1 Se, but significantly inhibited when the concentration of EG16 was raised to 11.3x107 CFU mL-1.
SCIENTIA HORTICULTURAE
(2023)
Article
Engineering, Environmental
Hong Li, Rongliang Qiu, Yetao Tang, Xiaoguang Duan, Yanling Gu, Hailan Yang, Qiang Chen, Zihan Shu, Ling Xiang, Shaobo Liu, Xiaofei Tan
Summary: Fe(IV) formation and PS activation in biochar/PS systems under a wide range of pH conditions were investigated using Fe-BC250. It was found that Fe-BC250/PS system showed superior performance in contaminant removal under alkaline conditions due to the slow release of Fe2+ and the formation of Fe(IV). This study provides new insights into Fe(IV) formation mechanism and highlights the potential application of low-cost iron-carbon composites in water treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Aijun Yao, Xiang Guo, Man Zhao, Shizhong Wang, Yetao Tang, Rongliang Qiu
Summary: Ca-Fe-Si material (CIS), a composite material rich in calcium, iron, manganese, and silicon, has shown excellent immobilization properties for heavy metals in soils. This study investigated the acid stability of CIS-fixed Cd (CIS-Cd) and the underlying immobilization mechanisms. The results showed that CIS-Cd exhibited distinctive acid buffering capacity in different pH ranges. Based on the dissolution rate of CIS-Cd and pH, CIS-Cd can be divided into non-acid-stable Cd, moderately acid-stable Cd, and acid-stable Cd. XRD analysis revealed that non-acid-stable Cd was mainly bound by carbonate, silicate, and sulfate, while moderately acid-stable Cd was mainly bound by magnesium-aluminum-silicon containing minerals or electronically bound by manganese-iron minerals. Acid-stable Cd remained undissolved at pH<2.42 and was strongly bound by CdFe2O4 and ferromanganese minerals. The findings highlight the remarkable immobilization capability and resiliency to environmental acidification of Ca-Fe-Si material. The proper combination of calcium-iron-silicon containing minerals can potentially develop novel amendments with high efficiency in heavy metal immobilization and strong resilience to environmental change.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Xu Yang, Jiachun Li, Yuze Zheng, Huashou Li, Rongliang Qiu
Summary: Salt-tolerant rice (sea rice) is an important cultivar for increasing rice yields in salinity soil. The co-existence of salinity and cadmium (Cd) toxicities in the plant-soil system poses a great challenge for sustainable agriculture. This study investigated the Cd accumulating features of sea rice under the co-stress of Cd and salinity. The results showed that sea rice accumulates more Cd than other high-Cd-accumulating rice varieties, and there is a positive correlation between Cd and Na levels in sea rice. The study also found that the coexistent Cd and salinity stress inhibited rice growth and yield, but the Cd concentration in rice grain was relatively low. Further research is needed to identify the phytoremediation potential of sea rice in Cd-polluted saline soil.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Engineering, Environmental
Hong -Xiang Zheng, Yu-Lu Yang, Wen-Shen Liu, Ying Zhong, Yue Cao, Rong-Liang Qiu, Chong Liu, Antony van der Ent, Martin J. Hodson, Ye-Tao Tang
Summary: Dicranopteris linearis is a hyperaccumulator plant of rare earth elements, and silicon plays a role in REE detoxification. The study found that Si supply can alleviate the damage caused by REE stress and increase the expression of pectin-related genes, pectin polysaccharide concentration, and methylesterase activity. Si-modified cell walls have higher REE retention capacity, and the [Si-pectin] matrix increases the accumulation capacity of pectin-REE. These findings lay the foundation for the development of phytotechnological applications using D. linearis in REE-contaminated sites.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Xin Wei, Yanan Pan, Zixiong Tang, Qingqi Lin, Yanqi Jiang, Jingyuan Chen, Weixuan Xian, Renli Yin, Adela Jing Li, Rongliang Qiu
Summary: The use of neonicotinoid insecticides (NEOs) has seen a significant rise since their introduction in the 1990s, but the extent of human exposure and health risks associated with it remain unclear. A study analyzing 205 commercial cow milk samples in the Chinese market found that all samples contained at least one quantified NEO, with over 90% of them having a mixture of NEOs. Certain NEOs were more commonly detected, especially in Chinese local milk, and their levels varied based on geographical origin. Organic farming, ultra heat treatment, and skimming were found to reduce NEO contamination in milk. Children were found to have a higher risk of exposure to NEOs through milk ingestion compared to adults. The frequent detection of NEOs in milk highlights the widespread presence of these insecticides, with potential health implications, particularly for children.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Microbiology
Guobao Wang, Xiuran Yin, Zekai Feng, Chiyu Chen, Daijie Chen, Bo Wu, Chong Liu, Jean Louis Morel, Yuanyuan Jiang, Hang Yu, Huan He, Yuanqing Chao, Yetao Tang, Rongliang Qiu, Shizhong Wang
Summary: This study systematically evaluated the effect of biofilm in a novel biological aqua crust on in situ metal(loid) bioremediation. The results showed that the biofilm enriched specific autotrophs and heterotrophs, which effectively controlled the accumulation and remediation of metal(loid)s and nutrients in the aquatic environments of mining areas. This research expands our understanding of the geochemical fate of metal(loid)s and has implications for enhancing in situ metal(loid) bioremediation.
Article
Plant Sciences
Chengfeng Hu, Bofang Yan, Yating Liu, Chen Gong, Man Zhao, Rongliang Qiu, Yetao Tang
Summary: This study found that abscisic acid-induced senescence promotes the accumulation and export of zinc to the grain in rice, but has no effect on the export of cadmium. Cadmium is accumulated in the cell wall, while zinc is released from chloroplasts and cytosol. Both zinc and cadmium concentrations in the grain are unaffected, as zinc is sequestered in the uppermost node. This study suggests that agronomic strategies can be used to differentially regulate the allocation of cadmium and zinc in rice during grain filling.
Article
Engineering, Chemical
Juanjuan Zhou, Yanwei Liu, Bingqian Li, Huashou Li, Guikui Chen, Rongliang Qiu
Summary: Titanium potassium oxalate is an efficient coagulant that can remove arsenic and cadmium simultaneously from drinking water. It can also soften water by consuming water hardness and releasing healthy potassium ions. This study provides a reliable solution for producing safe and healthy drinking water.
Article
Environmental Sciences
Bo-Fang Yana, Cheng-Feng Hu, Man Zhao, Rong-Liang Qiu, Ye-Tao Tang
Summary: A clear understanding of how Cd is allocated to grains is vital for effective management of Cd levels in cereal diets. This study found that pre-anthesis vegetative pools are an important source of Cd in rice grains. The lower leaves, internodes, and roots act as source organs, while the husks + rachis and nodes compete with the grain for remobilized Cd. These findings provide insight into the ecophysiological mechanism of Cd remobilization and can help in setting agronomic measures to reduce grain Cd levels.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Yu Jiang, Yifei Zhang, Yuanyuan Liang, Wen Liu, Yu Wang, Jiewen Yang, Rongliang Qiu, Hong J. Di, A. Dan
Summary: Soil nanocolloids can act as carriers for antibiotics and facilitate their migration and distribution in soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
