Surface-modified biochar in a bioretention system for Escherichia coli removal from stormwater

Chemosphere ◽  
2017 ◽  
Vol 169 ◽  
pp. 89-98 ◽  
Author(s):  
Abbe Y.T. Lau ◽  
Daniel C.W. Tsang ◽  
Nigel J.D. Graham ◽  
Yong Sik Ok ◽  
Xin Yang ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bioretention System ◽  
Modified Biochar ◽  
Surface Modified

scholarly journals Enhancement of chromate reduction in soils by surface modified biochar

2017 ◽  
Vol 186 ◽  
pp. 277-284 ◽  
Author(s):  
Sanchita Mandal ◽  
Binoy Sarkar ◽  
Nanthi Bolan ◽  
Yong Sik Ok ◽  
Ravi Naidu
Keyword(s):  
Chromate Reduction ◽  
Modified Biochar ◽  
Surface Modified

Evaluation of the Anti-Bacterial Activity of a Novel Chelate-Setting Apatite Cement Containing Lactoferrin

2012 ◽  
Vol 529-530 ◽  
pp. 187-191 ◽  
Author(s):  
Hitomi Ohsugi ◽  
Yuri Habuto ◽  
Michiyo Honda ◽  
Mamoru Aizawa ◽  
Nobuyuki Kanzawa
Keyword(s):  
Escherichia Coli ◽  
Bacterial Adhesion ◽  
Biofilm Formation ◽  
Bactericidal Effect ◽  
Bacterial Activity ◽  
Osteoblastic Cells ◽  
Inositol Hexaphosphate ◽  
Gram Negative ◽  
Apatite Cement ◽  
Surface Modified

We have developed a chelate-setting apatite cement. Synthesized hydroxyapatite (HAp) powders surface-modified with inositol hexaphosphate (IP6-HAp powder) were set by chelate-bonding with inositol hexaphosphate (IP6). Our aim is to fabricate IP6-HAp cement with anti-bacterial activity by adding lactoferrin (LF). It is known that LF has both anti-bacterial and osteoinductive activity. Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli were used to examine the effect of LF on biofilm formation and localization of living and dead cells. In addition, the cell viability of MC3T3-E1 osteoblastic cells was determined. Our results show that the anti-bacterial activity of LF is not due to a bactericidal effect but to the inhibition of bacterial adhesion to surfaces. Furthermore, LF cement did not affect cell proliferation. Thus, LF cement is a candidate for bifunctional biomaterials having both anti-bacterial and osteo-conductive activity.

Utility of Surface-Modified Biochar for Sequestration of Heavy Metals in Water

2021 ◽  
pp. 27-48
Author(s):  
E. Parameswari ◽  
R. Kalaiarasi ◽  
V. Davamani ◽  
T. Ilakiya ◽  
P. Kalaiselvi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Modified Biochar ◽  
Surface Modified

scholarly journals Evaluating the toxicity of TiO2-based nanoparticles to Chinese hamster ovary cells and Escherichia coli: a complementary experimental and computational approach

2017 ◽  
Vol 8 ◽  
pp. 2171-2180 ◽  
Author(s):  
Alicja Mikolajczyk ◽  
Natalia Sizochenko ◽  
Ewa Mulkiewicz ◽  
Anna Malankowska ◽  
Michal Nischk ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Chinese Hamster Ovary ◽  
Second Generation ◽  
Bimetallic Nanoparticles ◽  
Chinese Hamster Ovary Cells ◽  
Chinese Hamster ◽  
Computational Approach ◽  
Toxicity Tests ◽  
Surface Modified

Titania-supported palladium, gold and bimetallic nanoparticles (second-generation nanoparticles) demonstrate promising photocatalytic properties. However, due to unusual reactivity, second-generation nanoparticles can be hazardous for living organisms. Considering the ever-growing number of new types of nanoparticles that can potentially contaminate the environment, a determination of their toxicity is extremely important. The main aim of presented study was to investigate the cytotoxic effect of surface modified TiO2-based nanoparticles, to model their quantitative nanostructure–toxicity relationships and to reveal the toxicity mechanism. In this context, toxicity tests for surface-modified TiO2-based nanoparticles were performed in vitro, using Gram-negative bacteria Escherichia coli and Chinese hamster ovary (CHO-K1) cells. The obtained cytotoxicity data were analyzed by means of computational methods (quantitative structure–activity relationships, QSAR approach). Based on a combined experimental and computational approach, predictive models were developed, and relationships between cytotoxicity, size, and specific surface area (Brunauer–Emmett–Teller surface, BET) of nanoparticles were discussed.

scholarly journals Removal of E. coli from stormwater by bioretention system: parameter optimization and mechanism

2020 ◽  
Vol 81 (6) ◽  
pp. 1170-1179
Author(s):  
Jianwei Liu ◽  
Peng Yue ◽  
Yan He ◽  
Mengfei Zhao
Keyword(s):  
Escherichia Coli ◽  
Specific Surface ◽  
Surface Area ◽  
Parameter Optimization ◽  
System Parameter ◽  
Key Factors ◽  
Factors Affecting ◽  
E Coli ◽  
Bioretention System ◽  
Better Than

Abstract Four bioretention simulation columns were used to study the removal effects and influencing factors of Escherichia coli (E. coli) in stormwater. The mechanism of E. coli removal in the bioretention system was also analyzed. The results show that the removal effects of the four new composite filters are better than that of the conventional filter. The specific surface area and porosity of the filter may be the key factors affecting the removal effect; the increase of the filter depth is beneficial to the removal of E. coli; the area is conducive to the removal of E. coli. Excessive depth of the submerged zone will reduce the E. coli removal effect; drying will reduce the E. coli removal effect, but it can be restored by rewetting.

scholarly journals Surface-Modified Biochar with Polydentate Binding Sites for the Removal of Cadmium

2019 ◽  
Vol 20 (7) ◽  
pp. 1775 ◽  
Author(s):  
Rongqi Chen ◽  
Xi Zhao ◽  
Juan Jiao ◽  
Yan Li ◽  
Min Wei
Keyword(s):  
Photoelectron Spectroscopy ◽  
Disulfide Bonds ◽  
Selective Adsorption ◽  
Isotherm Models ◽  
Infrared Spectrometry ◽  
Maximum Adsorption Capacity ◽  
Disulfide Linkage ◽  
Modified Biochar ◽  
Before And After ◽  
Surface Modified

In this study, a surface chemical-modified rice husk biochar with abundant amino groups and disulfide bonds for the removal of cadmium was prepared using cystamine dihydrochloride as a modification ligand and glutaraldehyde as a crosslinker. The biochars were characterized by Fourier transform infrared spectrometry (FTIR), elemental analysis, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), thermogravimetry analysis (TGA), and nitrogen sorption (BET) before and after modification. The adsorption properties of the modified biochars for Cd (II) were investigated in detail via adsorption isotherm models, adsorption kinetics models, and selective adsorption experiments. The surfaces of the cystamine-modified biochars with granular nanopolymers of sufficient functional groups of primary amine and disulfide linkage rendered the biochar surface more conducive to electrostatic attraction and surface complexation. The theoretical maximum adsorption capacity of the modified biochars (81.02 mg g−1) was almost 10-fold greater than that of the raw biochars (8.347 mg g−1) for Cd (II). Besides, the cystamine-modified biochars had a better affinity for Cd (II) compared to other heavy metals (Zn, As, Cd, Co, Ni, Cr), showing six-fold greater affinity for Cd (II) than Zn2+. The results of this study indicate that the modification of biochars derived from rice husks shows great potential in the removal of Cd (II) from contaminated water.

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