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    Wyświetlanie 1-4 z 4
    Tytuł:
    Kinetics of photoelectrocatalytic degradation of diclofenac using N, S co-doped TiO2 nano-crystallite decorated TiO2 nanotube arrays photoelectrode
    Autorzy:
    Cui, Y.
    Deng, X.
    Ma, Q.
    Zhang, H.
    Cheng, X.
    Li, X.
    Xie, M.
    Cheng, Q.
    Li, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/207955.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    effluents
    nanotubes
    sodium sulfate
    sulfur compounds
    yarn
    photoelectrocatalytic degradation
    ścieki
    nanorurki
    siarczan sodu
    związki siarki
    przędza
    Opis:
    As a non-steroidal anti-inflammatory drug, diclofenac, was commonly used as analgesic, antiarthritic and antirheumatic, and has frequently been detected in municipal wastewater treatment plants (MWTPs) effluents and demonstrated to be potentially environmental risk on human beings. In the present study, N, S co-doped TiO2 nano-crystallites decorated TiO2 nano-tube arrays (N, S-TiO2 NCs/TiO2 NTAs) photoelectrode was used to degrade diclofenac containing wastewater. In addition, the effects of some critical parameters including initial pH, external positive potential, sodium sulfate concentration and initial diclofenac concentration on the photoelectrocatalytic (PEC) degradation of diclofenac containing wastewater and dynamic characteristics were investigated systematically. Results showed that N, S-TiO2 NCs/TiO2 NTAs photoelectrode exhibited high PEC efficiency for the degradation of diclofenac, in which the PEC processes fitted well with the Langmuir–Hinshelwood (L–H) model. Furthermore, external additional anions such as Cl–, ClO– and NO3 – played an important role in inhibiting the degradation of diclofenac. Also, the N, S-TiO2 NCs/TiO2 NTAs photoelectrode possessed good stability for consecutive applications for degradation of diclofenac, which could potentially be utilized in wastewater treatment.
    Źródło:
    Environment Protection Engineering; 2018, 44, 2; 117-130
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of ecological restoration patterns on runoff and sediment in an abandoned coal mine of Southern China
    Autorzy:
    Li, Hao
    Chen, Wenbo
    Zhang, Cheng
    He, Lei
    Liang, Haifen
    Li, Haifeng
    Liu, Dingpu
    Powiązania:
    https://bibliotekanauki.pl/articles/28407391.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    citrus fruit
    soil conservation
    vegetation
    Jiangxi Province
    ecological restoration
    coal mine
    owoce cytrusowe
    ochrona gleby
    wegetacja
    Prowincja Jiangxi
    renowacja ekologiczna
    kopalnia węgla
    Opis:
    Evaluating the ecological economic benefits of different ecological restoration patterns in abandoned mines is important in ecological restoration study. Taking the abandoned coal mine in Luoshi Township of Fengcheng county, Jiangxi province, as a case, 4 different ecological restoration patterns (grapefruit with grass vegetation – Pattern I, pine with grass vegetation – Pattern II, grapefruit – Pattern III, and bare slope – Pattern IV) have been conducted to study the runoff and sediment yield under natural rainfall conditions. The results showed that the ecological restoration patterns and rainfall intensity can significantly affect runoff and sediment yield which increased as rainfall intensity increased: Pattern IV > Pattern III > Pattern II > Pattern I. For the optimal ecological restoration with Pattern I, the average runoff and sediment reduction was 59.01 and 77.1%, respectively, in all rainfall intensities. Multivariate analysis of variance (MANOVA) showed that runoff and sediment were significantly affected by ecological restoration pattern and rainfall intensity (P < 0.05). Correlation analysis of runoff and sediment yields indicated that the reduction effect on sediment yield increased with the decrease of runoff, and the relationships between runoff and sediment at different ecological restoration patterns could be fitted with a linear function. Moreover, the vegetation configuration that combines fruit farming with grass can be not only beneficial to control soil and water conservation but produce considerable economic and ecological benefits.
    Źródło:
    Environment Protection Engineering; 2023, 49, 4; 29--44
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Degradation of toluene using UV/hydrogen peroxide process
    Autorzy:
    Cai, Shaokang
    Sun, Yue
    Gao, Canzhu
    Li, Pengfei
    Cheng, Zhongfa
    Powiązania:
    https://bibliotekanauki.pl/articles/2032937.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    AOP
    toluene
    hydrogen peroxide
    spectrofotometer
    toluen
    nadtlenek wodoru
    spektrofotometria
    Opis:
    Toluene in wastewater is volatile and difficult to degrade, and the longer it stays in the water, the higher is the risk. An advanced oxidation process (AOPs) has been used to degrade toluene rapidly and efficiently in wastewater by using ultraviolet light and hydrogen peroxide. Toluene in solution (initial concentration – 180 mg/dm3) with hydrogen peroxide (H2O2 dose – 2022 mg/dm3) was almost decomposed within 150 min. pH as well as the presence of various ions in waste water did not affect the degradation process. However, under strongly acidic conditions (pH less than 3), the chloride ions reduced the degradation efficiency of toluene. Based on the UV spectrophotometer and GC-MS analyses, the degradation pathways were observed: first, the methyl group was oxidized leading to the generation of benzoic acid, the benzene ring was subsequently opened by the action of hydroxyl radical, followed by the gradual decomposition of the intermediate products into small molecules such as water and carbon dioxide.
    Źródło:
    Environment Protection Engineering; 2021, 47, 1; 5-15
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficient phosphate removal in swine wastewatewater using Fe-Mn-modified pyro/hydrochar from swine manure
    Autorzy:
    Zhu, Fanglun
    Zhang, Cheng
    Shan, Shengdao
    Yuan, Wenqiao
    Pawłowski, Artur
    Song, Chengfang
    Cao, Yucheng
    Li, Yongfu
    Wangj, Junjie
    Qian, Jinyao
    Powiązania:
    https://bibliotekanauki.pl/articles/2032865.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phosphate adsorption
    pig
    water eutrophication
    biochar
    swine manure
    adsorpcja fosforanów
    trzoda chlewna
    eutrofizacja wód
    biowęgiel
    obornik świński
    Opis:
    Phosphorus in wastewater is one of the main causes of water eutrophication. Phosphorus removal from swine wastewater is always a challenge. To achieve on-site recycling of swine farm waste, the low-cost pyro/hydrochars and their Fe-Mn-modified form were prepared from swine manure as an efficient adsorbent for phosphate removal. The results showed that the phosphate removal efficiency of unmodified pyro/hydrochars was less than 7.77%, which was significantly increased to 58.21–83.76% for the Fe-Mn-modified-pyro/hydrochars. The maximum adsorption capacity of pyrochar was found on the Fe-Mn-modified-pyrochar (PC-600M) with a surface area of 102.03 m2/g and a micropore volume of 0.25 cm3/g. The PC-600M exhibited high adsorption capacity (26.07 mg/g) in a low concentration of phosphate (50 mg/dm3), and its removal efficiency reached up to 83.76% within 24 hours. Furthermore, the adsorption of phosphate on biochars without modification (HC-210 and PC-600) was validated using a first-order kinetic model, and the adsorption of phosphate on modified biochars (HC-210M and PC-600M) was well described by the second-order kinetic model and Langmuir isotherm. In addition, there is no significant difference in the adsorption of phosphorus between pyrochars and hydrochars, but the preparation cost of hydrochars is lower than that of pyrochars. It was confirmed that the low-cost Fe-Mn-modified pyro/hydrochar from swine manure had potential for efficient phosphate removal in wastewater treatment and would facilitate value-added utilization of swine manure.
    Źródło:
    Environment Protection Engineering; 2021, 47, 3; 83-101
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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