Remediation of lead and cadmium from simulated groundwater in loess region in northwestern China using permeable reactive barrier filled with environmentally friendly mixed adsorbents

2017 ◽  
Vol 25 (2) ◽  
pp. 1486-1496 ◽  
Author(s):  
Chunhui Fan ◽  
Yalin Gao ◽  
Yingchao Zhang ◽  
Wanqing Dong ◽  
Miao Lai
Keyword(s):  
Environmentally Friendly ◽  
Permeable Reactive Barrier ◽  
Northwestern China ◽  
Reactive Barrier ◽  
Lead And Cadmium ◽  
Simulated Groundwater ◽  
Loess Region

Removal of BTEX Using Adsorptive Biological Reactive Barrier

2015 ◽  
Vol 1092-1093 ◽  
pp. 897-902 ◽  
Author(s):  
Kang Ping Cui ◽  
Ben Shan Sun
Keyword(s):  
Removal Efficiency ◽  
Volume Ratio ◽  
Effective Porosity ◽  
Permeable Reactive Barrier ◽  
Ethyl Benzene ◽  
Control Group ◽  
Medium Sand ◽  
Reactive Barrier ◽  
Significant Performance ◽  
Simulated Groundwater

Adsorptive biological reactive barrier comprising medium sand-bentonite-microorganism for removing simulated groundwater BTEX (benzene, toluene, ethyl benzene, xylene) of different concentrations has been investigated with the variance of filling media ratio, and the dependence of BTEX removal efficiency in groundwater on electron acceptor was also studied through adding nitrate. The results show that the optimum volume ratio of bentonite-medium sand is 20:80, with a permeable reactive barrier permeability coefficient of 2.01 × 10-5 m/s and effective porosity of 16.71%. The addition of nitrate to biological reactive barrier stabilized BTEX removals under different concentrations, comparatively, while the control group without nitrate exhibited volatile BTEX removal efficiency. Under conditions of influent concentrations of 6, 8 and 10 mg/L, the BETX removal rates of biological reactive barrier with/without the addition of nitrate and the control group are about 94%/91%, 96%/90%, and 97%/87%, respectively. The adsorptive biological reactive barrier shows significant performance on BTEX removal, especially with the aid of nitrate additive.

scholarly journals Evaluation of the Efficiency of a Clay Permeable Reactive Barrier for the Remediation of Groundwater Contaminated with 137Cs

2017 ◽  
Vol 17 ◽  
pp. 444-447 ◽  
Author(s):  
Elena Torres ◽  
Paloma Gómez ◽  
Antonio Garralón ◽  
Belén Buil ◽  
María J. Turrero ◽  
...  
Keyword(s):  
Permeable Reactive Barrier ◽  
Reactive Barrier

Hydraulic performance of a permeable reactive barrier at Casey Station, Antarctica

Chemosphere ◽  
2014 ◽  
Vol 117 ◽  
pp. 223-231 ◽  
Author(s):  
K.A. Mumford ◽  
J.L. Rayner ◽  
I. Snape ◽  
G.W. Stevens
Keyword(s):  
Hydraulic Performance ◽  
Permeable Reactive Barrier ◽  
Reactive Barrier ◽  
Casey Station

Lead (II) Removal from Contaminated Soils by Electrokinetic Remediation Coupled with Modified Eggshell Waste

2018 ◽  
Vol 777 ◽  
pp. 256-261 ◽  
Author(s):  
André Ribeiro ◽  
André Mota ◽  
Margarida Soares ◽  
Carlos Castro ◽  
Jorge Araújo ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Removal Rate ◽  
Electrokinetic Remediation ◽  
Permeable Reactive Barrier ◽  
Inorganic Contaminants ◽  
Reactive Barrier ◽  
Eggshell Waste ◽  
Inorganic Fraction ◽  
Maximum Removal

Electrokinetic remediation deserves particular attention in soil treatment due to its peculiar advantages, including the capability of treating fine and low permeability materials, and achieving consolidation, dewatering and removal of salts and inorganic contaminants like heavy metals in a single stage. In this study, the remediation of artificially lead (II) contaminated soil by electrokinetic process, coupled with Eggshell Inorganic Fraction Powder (EGGIF) permeable reactive barrier (PRB), was investigated. An electric field of 2 V cm-1was applied and was used an EGGIF/soil ratio of 30 g kg-1 of contaminated soil for the preparation of the permeable reactive barrier (PRB) in each test. It was obtained high removal rates of lead in both experiments, especially near the cathode. In the normalized distance to cathode of 0.2 it was achieved a maximum removal rate of lead (II) of 68, 78 and 83% in initial lead (II) concentration of 500 mg-1, 200 mg-1 and 100 mg-1, respectively. EGGIF (Eggshell Inorganic Fraction) proved that can be used as permeable reactive barrier (PRB) since in all the performed tests were achieved adsorptions yields higher than 90%.

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