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您的检索式：作者名="Benteng Ma"
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| 1 | Investigation of phosphate adsorption from an aqueous solution using spent fluid catalytic cracking catalyst containing lanthanum显示文摘A spent fluid catalytic cracking (FCC)catalyst containing lanthanum (La)was used as a novel adsorbent for phosphorus (P)in simulated wastewater.The experiments were conducted in a batch system to optimize the operation variables,including pH,calcination temperature,shaking time,solidliquid ratio,and reaction temperature under three initial P-concentrations (C0=0.5,1.0,and 5.0mg/L). Orthogonal analysis was used to determine that the initial P-concentration was the most important parameter for P removal.The P-removal rate exceeded 99% and the spent FCC catalyst was more suitable for use in low P-concentration wastewater (C0<5.0mg/L).Isotherms,thermodynamics and dynamics of adsorption are used to analyze the mechanism of phosphorus removal.The results show that the adsorption is an endothennic reaction with high affinity and poor reversibility,which indicates a low risk of second releasing of phosphate.Moreover,chemical and physical adsorption coexist in this adsorption process with LAPO4 and KH2PO4formed on the spent FCC catalyst as the adsorption product.These results demonstrate that the spent FCC catalyst containing La is a potential adsorbent for P-removal from wastewater,which allows recycling of the spent FCC catalyst to improve the quality of water body. | Zhen Li Zhaofu Qiu Ji Yang Benteng Ma Shuguang Lu Chuanhui Qin | 2018 | Frontiers of Environmental Science & Engineering2018，12，6： | 2 |
| 2 | Characteristics of snow cover distribution along railway subgrade and the protective effect of snow fences显示文摘Railways built in cold,snowy,and lightly populated areas are subjected to wind and snow disasters.In this study,we selected a snow hazard prevention and control section of the Altay–Zhundong Railway in Xinjiang Uygur Autonomous Region of China as the research object.We investigated the deposited snowfall variation characteristics on the two sides and in the embankment pavement area of snow fences with different porosities,fence heights,and arrangement distances using single-factor tests and orthogonal tests based on global atmospheric reanalysis climate data,field survey data,and a multi-phase flow analysis model.The results showed significant differences in the characteristics of snow cover distribution and snow cover thickness between the embankment and the cutting in the absence of snow protection measures.The maximum snow cover thickness of the embankment pavement decreased by 12.6%relative to the cutting pavement.The snow cover thickness of the embankment exhibited an increasing trend from windward shoulder to leeward shoulder,whereas the snow cover thickness of the cutting presented a declining trend from windward shoulder to leeward toe.In the collaborative prevention and control of snow fences and embankments,the three factors can be ranked in terms of their sensitivity to deposited snowfall within the influence scope of snow fences as follows:fence height>arrangement distance>porosity.At the same time,fence height yielded a significant relationship for the influence scope of snow fences(P<0.05).The three factors can also be ranked in terms of their sensitivity to deposited snowfall on the pavement as follows:porosity>fence height>arrangement distance.For the embankment protection of the Altay–Zhundong Railway against wind and snow,snow fence with a porosity of 75%,a fence height of 4.8 m,and an arrangement distance from the embankment of 60 m produced the best snow control effect.By revealing the characteristics of snow cover distribution along railway subgrade and the protective effect of snow fences,this study provides valuable references for the engineering applications of railway construction in areas prone to wind and snow disasters. | LEI Jia CHENG Jianjun GAO Li MA Benteng AN Yuanfeng DONG Hongguang | 2023 | Journal of Arid Land2023，15，8： | 0 |
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