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  • Wiley  (38)
  • General works  (38)
  • 1
    Online Resource
    Online Resource
    Wiley ; 2022
    In:  Water Environment Research Vol. 94, No. 6 ( 2022-06)
    In: Water Environment Research, Wiley, Vol. 94, No. 6 ( 2022-06)
    Abstract: Nickel exists primarily as a stable complex in electroless nickel plating wastewater, and the Ni recovery from it cannot be achieved solely through electrodeposition. As the electrocatalytic oxidation has excellent oxidation potential to break down the complex, an efficient and stable electrochemical system using the synergy of electrocatalytic oxidation and electrochemical deposition technology was developed for the recovery of nickel from electroless nickel plating wastewater. In the present study, the effects of initial pH, current density, and initial nickel ion concentration on the treatment performance of the electrochemical system was investigated. The highest Ni recovery (94.84%) and total organic carbon removal (63.94%) were achieved at a current density of 83.3 mA/cm 2 , initial pH of 3.0, and initial Ni concentration of 0.01 M. At the same time, the recovered nickel product was confirmed by scanning electron microscopy, energy dispersive X‐ray, X‐ray powder diffraction, and X‐ray photoelectron spectroscopy. Furthermore, the electrochemical system displayed good stability and economic benefits, thereby suggesting its excellent application potential for the treatment of electroless nickel plating wastewater. Practitioner Points An efficient and stable electrochemical system was developed for the recovery of nickel from electroless nickel plating wastewater. In an acidic medium, the nickel recovery rate and TOC removal ratio were 94.84% and 63.94%, respectively. The system displayed good stability, thereby suggesting its excellent application potential for the treatment of nickel plating wastewater.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 2
    In: Water Environment Research, Wiley, Vol. 94, No. 11 ( 2022-11)
    Abstract: The Feng‐Sang River is a metropolitan river in Kaohsiung City, Taiwan. In this study, Feng‐Sang River sediments were analyzed to investigate the distributions and sources of polycyclic aromatic hydrocarbons (PAHs). The Sediment Quality Guidelines (SQGs), potentially carcinogenic PAHs (TEQ carc ), and toxic equivalence quotient (TEQ) were applied to evaluate influences of PAHs on ecosystems and microbial diversities. Results indicate that PAHs concentrations varied between seasons and locations. The concentrations of ∑ 16 PAHs ranged from 73.6 to 603.8 ng/kg in dry seasons and from 2.3 to 199.3 ng/kg in wet seasons. This could be because of the flushing effect during wet seasons, which caused the movement and dilution of the PAH‐contaminated sediments. Diagnostic ratio analysis infers that high PAHs levels were generated by combustion processes and vehicle traffic, and results from multivariate descriptive statistical analysis also demonstrate that the vehicular traffic pollution could be the major emission source of PAHs contamination. Comparisons of PAHs with SQGs indicate that PAHs concentrations in sediment were below the effects range low (ERL) values, and thus, the immediate threat to organisms might not be significant. The diagnostic ratio analyses are effective methods for PAH source appointment. The metagenomic assay results imply that sediments contained essential microbial species with eminent diversity. The detected PAH‐degrading bacteria ( Desulfatiglans, Dechloromonas, Sphingomonas, Methylobacterium, Rhodobacter, Clostridium , and Exiguobacterium ) played a key role in PAHs biotransformation, and Dechloromonas and Rhodobacter had a higher relative abundance. Results of microbial diversity analyses indicate that the contaminated environment induced the changes of governing microbial groups in sediments. Practitioner Points Diagnostic ratio analyses are effective methods for PAHs source appointment. Microbial composition in sediments are highly affected by anthropogenic pollution. Combustion and vehicle traffic contribute to urban river sediments pollution by PAHs. Dechloromonas and Rhodobacter are dominant PAHs‐degrading bacteria in sediments.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 3
    In: Water Environment Research, Wiley, Vol. 95, No. 7 ( 2023-07)
    Abstract: The Salt River is an important urban river in Kaohsiung, Taiwan. In this study, the source identification and risk and toxicity assessment of the heavy‐metal‐contaminated sediments in the Salt River were investigated. The geo‐accumulation index (Igeo), enrichment factor (EF), sediment quality guidelines (SQGs), potential ecological risk index (RI), pollution load index (PLI), and toxic units (TU) were applied to determine effects of heavy metals on microbial diversities and ecosystems. Results from the ecological and environmental risk assessment show that high concentrations of Zn, Cr, and Ni were detected in the midstream area and the sum of toxic units (ΣTUs) in the midstream (7.2–32.0) is higher than in the downstream (14.0–19.7) and upstream (9.2–17.1). It could be because of the continuous inputs of heavy‐metal‐contained wastewaters from adjacent industrial parks. Results also inferred that the detected heavy metals in the upstream residential and commercial areas were possibly caused by nearby vehicle emissions, non‐point source pollution, and domestic wastewater discharges. Results of metagenomic assays show that the sediments contained significant microbial diversities. Metal‐tolerant bacterial phyla (Proteobacteria: 24.4%–46.4%, Bacteroidetes: 1.3%–14.8%, and Actinobacteria: 2.3%–11.1%) and pathogenic bacterial phyla (Chlamydiae: 0.5%–37.6% and Chloroflexi: 5.8%–7.2%) with relatively high abundance were detected. Metal‐tolerant bacteria would adsorb metals and cause the increased metal concentrations in sediments. Results indicate that the bacterial composition in sediment environments was affected by anthropogenic pollution and human activities and the heavy‐metal‐polluted ecosystem caused the variations in bacterial communities. Practitioner Points Microbial community in sediments is highly affected by heavy metal pollution. Wastewaters and vehicle traffic contribute to river sediments pollution by heavy metals. Proteobacteria, Bacteroidota, and Actinobacteria are dominant heavy‐metal‐tolerant bacterial phyla in sediments. Toxicity assessment is required to study risk levels of heavy‐metal contained sediments.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 4
    Online Resource
    Online Resource
    Wiley ; 1998
    In:  Water Environment Research Vol. 70, No. 5 ( 1998-07), p. 1090-1095
    In: Water Environment Research, Wiley, Vol. 70, No. 5 ( 1998-07), p. 1090-1095
    Abstract: Coke plant wastewater containing high concentrations of ammonia and toxic compounds such as phenol and cyanide was treated using a biological nitrogen removal (BNR) system comprising carbon removal, nitrification, and dentrification stages. The objective of this study was to investigate the feasibility of complete ammonia removal from the coke plant wastewater using a sequential BNR process with external carbon addition. Sodium acetate was introduced as an external carbon source to the denitrification stage after oxidation of phenol and other carbonaceous compounds in the carbon‐removal stage. The efficiency of denitrification was strongly affected by the loading rate of the external carbon source, and its optimal rate was determined based on the ratio of chemical oxygen demand to nitrate‐ and nitrite‐nitrogen (COD:NO x ‐N) of the denitrification stage. The overall removal efficiency of major soluble pollutants in the wastewater was greater than 95% in the BNR system. When a step input of phenol was introduced to check the stability of the overall system, the nitrification was markedly inhibited because of the incomplete degradation of phenol in the carbon‐removal stage. However, after this brief inhibition, the nitrification stage recovered to its normal efficiency within 18 days.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 1998
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 5
    Online Resource
    Online Resource
    Wiley ; 2001
    In:  Water Environment Research Vol. 73, No. 4 ( 2001-07), p. 415-425
    In: Water Environment Research, Wiley, Vol. 73, No. 4 ( 2001-07), p. 415-425
    Abstract: An online monitoring and controlling system was developed for controlling external carbon addition in the biological nitrogen removal (BNR) process of a coke‐plant wastewater treatment plant. Two control regimes, on–off control and feed‐forward control, were applied and their performances were compared under normal and abnormal nitrate (NO − 3 –N) input conditions. The water quality of the final effluent was stably controlled under normal nitrate input conditions by using the on–off control algorithm that is connected to the effluent nitrate concentration. However, unexpected nitrite accumulation was observed under abnormal nitrate input conditions (i.e., sudden increase of nitrate concentration), resulting from chemical oxygen demand (COD) limitations during denitrification. On the contrary, the feed‐forward control algorithm more reliably controlled external carbon addition even under abnormal nitrate input conditions. The input COD/NO − 3 –N was controlled between 3.55 and 3.62 during the operational period when the feed‐forward algorithm was applied. Through trial and error, the optimum value of COD/NO − 3 –N for denitrification was determined to be 3.59 in separate experiments.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2001
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 6
    Online Resource
    Online Resource
    Wiley ; 2010
    In:  Water Environment Research Vol. 82, No. 10 ( 2010-10), p. 1159-1234
    In: Water Environment Research, Wiley, Vol. 82, No. 10 ( 2010-10), p. 1159-1234
    Abstract: This review for literature published in 2009 contains information related to membrane processes for municipal and industrial applications. This review is a subsection of the Treatment Systems section of the annual Water Environment Federation literature review and covers the following topics: pretreatment, membrane bioreactor (MBR) configuration, design, nutrient removal, operation, industrial treatment, fixed film and anaerobic membrane systems, reuse, microconstituents removal, membrane technology advances, membrane fouling, and modeling. ———————
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2010
    detail.hit.zdb_id: 1098976-6
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  • 7
    In: Water Environment Research, Wiley, Vol. 95, No. 5 ( 2023-05)
    Abstract: La 2 O 3 and CeO 2 , as main rare earth oxides, with unique physical and chemical properties have been widely used in catalyst and grinding industry. In this study, the effects of La 2 O 3 and CeO 2 on the anaerobic process were investigated. The biological methane production tests showed that 0–0.05 g/L La 2 O 3 and 0–0.05 g/L CeO 2 enhanced anaerobic methanogenesis process. The result showed maximum specific methanogenic rates of La 2 O 3 and CeO 2 were 56.26 mL/(h·gVSS) and 49.43 mL/(h·gVSS) and, compared with the control, increased 4% and 3%, respectively. La 2 O 3 significantly reduced the accumulation of volatile fatty acids (VFAs), whereas CeO 2 had no similar effect. Dissolution experiments demonstrated that the content of extracellular La in the anaerobic granular sludge reached 404 μg‐La/g volatile suspended solid (VSS), which was 134 times higher than that of extracellular Ce (3 μg‐Ce/gVSS). The content of intracellular La reached 206 μg‐La/gVSS, which was 19 times higher than that of intracellular Ce (11 μg‐Ce/gVSS). The different stimulation between La 3+ and Ce 3+ could be attributed to the different dissolution of La 2 O 3 and CeO 2 . The result of this work is helpful to optimize anaerobic processes and to develop novel additives. Practitioner Points Novel anaerobic additives were developed. La2O3 and CeO2 in 0–0.05 g/L enhanced organics degradation and methane production. The addition of La2O3 significantly reduced the accumulation of volatile fatty acids. The solubilization of La2O3 was stronger than CeO2. The promoting effects of low concentrations of La2O3 and CeO2 were derived from dissolved La and Ce.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 8
    In: Water Environment Research, Wiley, Vol. 86, No. 1 ( 2014-01), p. 48-55
    Abstract: The deposit of noble metal on titanium dioxide (TiO 2 ) has been considered as an effective strategy to improve the activity of TiO 2 . In this study, TiO 2 nanoparticles were prepared using a sol‐gel route followed by heat treatment at elevated temperatures (573 K, 773 K, and 973 K). TiO 2 ‐Pt catalyst (1 wt%) was prepared by depositing Pt on the surface of the prepared TiO 2 nanoparticles. TiO 2 and TiO 2 ‐Pt were used as heterogeneous catalysts to remove humic acid with UV‐light (120 W) illumination. TiO 2 prepared at low temperature with smaller particle size and larger specific surface area had stronger activity on humic acid degradation. Deposit of Pt would favor separation of photogenerated charges and enhance the photocatalyst activity, but its coating of the active site also inhibited degradation of humic acid. The addition of H 2 O 2 enhanced degradation of humic acid for more active oxygen produced. Low pH (pH = 4) was helpful to adsorb humic acid on the surface of TiO 2 and, correspondingly, enhance degradation of humic acid (44.4%).
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 9
    In: Water Environment Research, Wiley, Vol. 87, No. 1 ( 2015-01), p. 88-95
    Abstract: Soil clays ( 〈 2,000 nm) (SC) and soil nanoclays ( 〈 100 nm) (SNC) were used as adsorbents for removal of Cu(II) from aqueous solution. The experiments were conducted with variables including pH, interaction time, concentration of Cu(II) and temperature. Four kinetic models have been employed to investigate adsorption mechanisms, and the experimental data more closely resemble a second‐order process of the kinetic model. Adsorption studies on soil nanoclays have been shown to be highly effective in removing of Cu(II) from aqueous solution. This adsorbent is widely available as a natural material, is mechanically stable and, most importantly, it is environmentally appealing. The maximum Cu(II) adsorption capacity of soil nanoclays (31.7 mg/g) is more than three times higher than natural soil clays (10.2 mg/g). Our study demonstrates that soil nanoclays can be used effectively for removal of Cu(II) from aqueous systems to achieve environmental cleaning purposes.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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  • 10
    Online Resource
    Online Resource
    Wiley ; 2016
    In:  Water Environment Research Vol. 88, No. 5 ( 2016-05), p. 403-407
    In: Water Environment Research, Wiley, Vol. 88, No. 5 ( 2016-05), p. 403-407
    Abstract: Ozonation of real dye wastewater for removal of color and COD reduction covering a wide range in operating parameters forms the scope of the present work. The influence of parameters such as influent pH, ozone flow rate and initial effluent concentration on ozonation efficiency has been critically examined. It has been observed from the present investigation that a maximum of COD removal efficiency of 92.5% has been achieved under optimum operating conditions (pH=11; ozone flow rate: 6×10 −3 m 3 /minute). Further the biodegradability index of the dye effluent has increased from an initial value of 0.18 to 0.49 during ozonation indicating favorable adaptation of ozonation as a primer to the biochemical technique to enhance the efficiency of biochemical treatment.
    Type of Medium: Online Resource
    ISSN: 1061-4303 , 1554-7531
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 1098976-6
    detail.hit.zdb_id: 2051010-X
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