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Journal of Environmental Sciences (China)

Song Cheng, Libo Zhang, Aiyuan Ma, Hongying Xia, Jinhui Peng, Chunyang Li, Jianhua Shu
The methylene blue (MB) removal abilities of raw activated carbon and iron/cerium modified raw activated carbon (Fe-Ce-AC) by adsorption were researched and compared. The characteristics of Fe-Ce-AC were examined by N2 adsorption, zeta potential measurement, FTIR, Raman, XRD, XPS, SEM and EDS. After modification, the following phenomena occurred: The BET surface area, average pore diameter and total pore volume decreased; the degree of graphitization also decreased. Moreover, the presence of Fe3 O4 led to Fe-Ce-AC having magnetic properties, which makes it easy to separate from dye wastewater in an external magnetic field and subsequently recycle...
March 2018: Journal of Environmental Sciences (China)
Yingshuai Liu, Yunshan Ge, Jianwei Tan, Mingliang Fu, Asad Naeem Shah, Luqiang Li, Zhe Ji, Yan Ding
Maritime transport has been playing a decisive role in global trade. Its contribution to the air pollution of the sea and coastal areas has been widely recognized. The air pollutant emission inventories of several harbors in China have already been established. However, the emission factors of local ships have not been addressed comprehensively, and thus are lacking from the emission inventories. In this study, on-board emission tests of eight diesel-powered offshore fishing ships were conducted near the coastal region of the northern Yellow Bo Sea fishing ground of Dalian, China...
March 2018: Journal of Environmental Sciences (China)
Wei Zheng, Zhenya Zhang, Rui Liu, Zhongfang Lei
A lab-scale intermittently aerated sequencing batch reactor (IASBR) was applied to treat anaerobically digested swine wastewater (ADSW) to explore the removal characteristics of veterinary antibiotics. The removal rates of 11 veterinary antibiotics in the reactor were investigated under different chemical organic demand (COD) volumetric loadings, solid retention times (SRT) and ratios of COD to total nitrogen (TN) or COD/TN. Both sludge sorption and biodegradation were found to be the major contributors to the removal of veterinary antibiotics...
March 2018: Journal of Environmental Sciences (China)
Ping Yang, Derrick Y F Lai, Jia F Huang, Chuan Tong
Aquaculture ponds are dominant features of the landscape in the coastal zone of China. Generally, aquaculture ponds are drained during the non-culture period in winter. However, the effects of such drainage on the production and flux of greenhouse gases (GHGs) from aquaculture ponds are largely unknown. In the present study, field-based research was performed to compare the GHG fluxes between one drained pond (DP, with a water depth of 0.05m) and one undrained pond (UDP, with a water depth of 1.16m) during one winter in the Min River estuary of southeast China...
March 2018: Journal of Environmental Sciences (China)
Suverna Trivedi, Ram Prasad
Compressed natural gas (CNG) is most appropriate an alternative of conventional fuel for automobiles. However, emissions of carbon-monoxide and methane from such vehicles adversely affect human health and environment. Consequently, to abate emissions from CNG vehicles, development of highly efficient and inexpensive catalysts is necessary. Thus, the present work attempts to scan the effects of precipitants (Na2 CO3 , KOH and urea) for nickel cobaltite (NiCo2 O4 ) catalysts prepared by co-precipitation from nitrate solutions and calcined in a lean CO-air mixture at 400°C...
March 2018: Journal of Environmental Sciences (China)
Bin Qu, Mika Sillanpää, Shichang Kang, Fangping Yan, Zhiguo Li, Hongbo Zhang, Chaoliu Li
Rivers are critical links in the carbon and nitrogen cycle in aquatic, terrestrial, and atmospheric environments. Here riverine carbon and nitrogen exports in nine large rivers on the Tibetan Plateau - the "Water Tower of Asia" - were investigated in the monsoon season from 2013 to 2015. Compared with the world average, concentrations of dissolved inorganic carbon (DIC, 30.7mg/L) were high in river basins of the plateau due to extensive topographic relief and intensive water erosion. Low concentrations of dissolved organic carbon (DOC, 1...
March 2018: Journal of Environmental Sciences (China)
Haotian Wang, Yayuan Li, Xinghui Xia, Xinyue Xiong
Many studies have investigated bioaccumulation and metabolism of polycyclic aromatic hydrocarbons (PAHs) in aquatic organisms. However, lack of studies investigated both processes simultaneously, and the interaction between these two processes is less understood so far. This study investigated the bioaccumulation kinetics of PAHs and metabolic enzyme activities, including total cytochrome P450 (CYPs) and total superoxide dismutase (T-SOD), in zebrafish. Mature zebrafish were exposed to the mixture of phenanthrene and anthracene under constant concentration maintained by passive dosing systems for 16days...
March 2018: Journal of Environmental Sciences (China)
Gang Pan, Tao Lyu, Robert Mortimer
No abstract text is available yet for this article.
March 2018: Journal of Environmental Sciences (China)
Sai Xu, Wenjing Lu, Farooq Mustafa Muhammad, Yanting Liu, Hanwen Guo, Ruihong Meng, Hongtao Wang
The denitrifying anaerobic methane oxidation is an ecologically important process for reducing the potential methane emission into the atmosphere. The responsible bacterium for this process was Candidatus Methylomirabilis oxyfera belonging to the bacterial phylum of NC10. In this study, a new pair of primers targeting all the five groups of NC10 bacteria was designed to amplify NC10 bacteria from different environmental niches. The results showed that the group A was the dominant NC10 phylum bacteria from the sludges and food waste digestate while in paddy soil samples, group A and group B had nearly the same proportion...
March 2018: Journal of Environmental Sciences (China)
Limei Xu, Chongmiao Zhang, Pengcheng Xu, Xiaochang C Wang
Traditional culture methods may underestimate the tolerance of microorganisms to disinfectants because of the existence of viable but nonculturable or sublethally injured cells after disinfection. The selection of a strict method is crucial for the evaluation of disinfection performance. The actions of 2 typical disinfectants - ultraviolet (UV) and chlorine - on the fecal indicator Escherichia coli were investigated by the detection of culturability, membrane permeability, metabolic activity, deoxyribonucleic acid (DNA), and messenger ribonucleic acid (mRNA)...
March 2018: Journal of Environmental Sciences (China)
Yanfeng Wang, Wei Chen, Xiao Chen, Huajun Feng, Dongsheng Shen, Bin Huang, Yufeng Jia, Yuyang Zhou, Yuxiang Liang
CdS/MoS2 , an extremely efficient photocatalyst, has been extensively used in hydrogen photoproduction and pollutant degradation. CdS/MoS2 can be synthesized by a facile one-step hydrothermal process. However, the effect of the sulfur source on the synthesis of CdS/MoS2 via one-step hydrothermal methods has seldom been investigated. We report herein a series of one-step hydrothermal preparations of CdS/MoS2 using three different sulfur sources: thioacetamide, l-cysteine, and thiourea. The results revealed that the sulfur source strongly affected the crystallization, morphology, elemental composition and ultraviolet (UV)-visible-light-absorption ability of the CdS/MoS2 ...
March 2018: Journal of Environmental Sciences (China)
Huihui Han, Hengfeng Miao, Yajing Zhang, Minfeng Lu, Zhenxing Huang, Wenquan Ruan
Disinfection byproduct (DBP) precursors in wastewater during the reversed anaerobic-anoxic-oxic (A2 /O) process, as well as their molecular weight (MW) and polarity-based fractions, were characterized with UV scanning, fluorescence excitation emission matrix, Fourier transform infrared and nuclear magnetic resonance spectroscopy. Their DBP formation potentials (DBPFPs) after chlorination were further tested. Results indicated that the reversed A2 /O process could not only effectively remove the dissolved organic carbon (DOC) and dissolved total nitrogen in the wastewater, but also affect the MW distribution and hydrophilic-hydrophobic properties of dissolved organic matter (DOM)...
March 2018: Journal of Environmental Sciences (China)
Ya Cheng, Ye Li, Tinglin Huang, Yuankui Sun, Xinxin Shi, Yuezong Shao
As an efficient method for ammonium (NH4 + ) removal, contact catalytic oxidation technology has drawn much attention recently, due to its good low temperature resistance and short start-up period. Two identical filters were employed to compare the process for ammonium removal during the start-up period for ammonium removal in groundwater (Filter-N) and surface water (Filter-S) treatment. Two types of source water (groundwater and surface water) were used as the feed waters for the filtration trials. Although the same initiating method was used, Filter-N exhibited much better ammonium removal performance than Filter-S...
March 2018: Journal of Environmental Sciences (China)
Roberto Raga, Alberto Pivato, Maria Cristina Lavagnolo, Laura Megido, Raffaello Cossu
In this study, a top cover system is investigated as a control for emissions during the aftercare of new landfills and for old landfills where biogas energy production might not be profitable. Different materials were studied as landfill cover system in lab-scale columns: mechanical-biological pretreated municipal solid waste (MBP); mechanical-biological pretreated biowaste (PB); fine (PBSf ) and coarse (PBSc ) mechanical-biological pretreated mixtures of biowaste and sewage sludge, and natural soil (NS). The effectiveness of these materials in removing methane and sulphur compounds from a gas stream was tested, even coupled with activated carbon membranes...
March 2018: Journal of Environmental Sciences (China)
Lin Zhu, Zhaoping Zhong, Jianming Xue, Yueyang Xu, Chunhua Wang, Lixia Wang
Niobium oxide as the promoter was doped in the V/WTi catalyst for the selective catalytic reduction (SCR) of NO. The results showed that the addition of Nb2 O5 could improve the SCR activity at low temperatures and the 6wt.% additive was an appropriate dosage. The enhanced reaction activity of adsorbed ammonia species and the improved dispersion of vanadium oxide might be the reasons for the elevation of SCR activity at low temperatures. The resistances to SO2 of 3V6Nb/WTi catalyst at different temperatures were investigated...
March 2018: Journal of Environmental Sciences (China)
Nutthavich Thouchprasitchai, Nuthapol Pintuyothin, Sangobtip Pongstabodee
The objective of this research was to investigate CO2 adsorption capacity of tetraethylenepentamine-functionalized basic-modified calcined hydrotalcite (TEPA/b-cHT) sorbents at atmospheric pressure formed under varying TEPA loading levels, temperatures, sorbent weight to total gaseous flow rate (W/F) ratios and CO2 concentrations in the influent gas. The TEPA/b-cHT sorbents were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectrometry (FT-IR), thermal gravimetric analysis (TGA), Brunauer-Emmet-Teller (BET) analysis of nitrogen (N2 ) adsorption/desorption and carbon-hydrogen-nitrogen (CHN) elemental analysis...
March 2018: Journal of Environmental Sciences (China)
Yifeng Xue, Yong Wang, Xuefeng Li, Hezhong Tian, Lei Nie, Xiaoqing Wu, Junrui Zhou, Zhen Zhou
The mass concentration and major chemical components of fine particulate matter were measured before, during and after Beijing's massive parade commemorating 70th anniversary of the Chinese Victory in World War II on September 3, 2015. Regional emission inventory, positive matrix factorization (PMF), observations from space and backward air mass trajectories were jointly applied to identify the major pollution sources and their temporal and spatial variations. The contributions of emissions variations and the meteorological conditions related to the "parade blue" phenomenon in Beijing and its surrounding areas were investigated in detail...
March 2018: Journal of Environmental Sciences (China)
Hui Yin, Xinping Wang, Zhangjie Qin, Matthew Ginder-Vogel, Shuang Zhang, Shuqi Jiang, Fan Liu, Shiwei Li, Jing Zhang, Yan Wang
Hexagonal turbostratic birnessite, with the characteristics of high contents of vacancies, varying amounts of structural and adsorbed Mn3+ , and small particle size, undergoes strong adsorption reactions with trace metal (TM) contaminants. While the interactions of TM, i.e., Zn2+ , with birnessite are well understood, the effect of birnessite structural characteristics on the coordination and stability of Zn2+ on the mineral surfaces under proton attack is as yet unclear. In the present study, the effects of a series of synthesized hexagonal turbostratic birnessites with different Mn average oxide states (AOSs) on the coordination geometry of adsorbed Zn2+ and its stability under acidic conditions were investigated...
March 2018: Journal of Environmental Sciences (China)
Elzbieta Weryszko-Chmielewska, Idalia Kasprzyk, Malgorzata Nowak, Aneta Sulborska, Joanna Kaczmarek, Agata Szymanska, Weronika Haratym, Miroslaw Gilski, Malgorzata Jedryczka
The spores of Cladosporium Link. are often present in the air in high quantities and produce many allergenic proteins, which may lead to asthma. An aerobiological spore monitoring program can inform patients about the current spore concentration in air and help their physicians determine the spore dose that is harmful for a given individual. This makes it possible to develop optimized responses and propose personalized therapy for a particular sensitive patient. The aim of this study was to assess the extent of the human health hazard posed by the fungal genus Cladosporium...
March 2018: Journal of Environmental Sciences (China)
Wei Xing, Jinlong Li, Peng Li, Chong Wang, Yanan Cao, Desheng Li, Yunfeng Yang, Jizhong Zhou, Jiane Zuo
Hydrogenotrophic denitrification is promising for tertiary nitrogen removal from municipal wastewater. To reveal the influence of residual organics in municipal wastewater on hydrogenotrophic denitrifiers, we adopted high-throughput 16S rRNA gene amplicon sequencing to examine microbial communities in hydrogenotrophic denitrification enrichments. Using effluent from a municipal wastewater treatment plant as water source, COD, nitrate and pH were controlled the same except for a gradient of biodegradable carbon (i...
March 2018: Journal of Environmental Sciences (China)
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