Chitosan-modified biochar immobilised arsenic in root medium and enhanced the growth of zucchini (cv. Courgette d

2021 ◽  
Author(s):  
Sajid Mehmood ◽  
Waqas Ahmed ◽  
Muhammad Imtiaz ◽  
Muhammad Qaswar ◽  
Muhammad Ikram ◽  
...  
Keyword(s):  
2019 ◽  
Vol 674 ◽  
pp. 327-335 ◽  
Author(s):  
Lina Lin ◽  
Zhengguo Song ◽  
Xuewei Liu ◽  
Zulqarnain Haider Khan ◽  
Weiwen Qiu

2021 ◽  
Vol 14 ◽  
pp. 100689
Author(s):  
Hariprasad Nath ◽  
Ankumoni Saikia ◽  
Prasanta Jyoti Goutam ◽  
Binoy K. Saikia ◽  
Nabajyoti Saikia

2021 ◽  
Vol 127 ◽  
pp. 112-120
Author(s):  
Qi Tao ◽  
Bing Li ◽  
Yixuan Chen ◽  
Junwen Zhao ◽  
Qiquan Li ◽  
...  

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 103
Author(s):  
Xiaoming Song ◽  
Yuewen Zhang ◽  
Nan Cao ◽  
Dong Sun ◽  
Zhipeng Zhang ◽  
...  

This study developed a nano-magnetite-modified biochar material (m-biochar) using a simple and rapid in situ synthesis method via microwave treatment, and systematically investigated the removal capability and mechanism of chromium (VI) by this m-biochar from contaminated groundwater. The m-biochar was fabricated from reed residues and magnetically modified by nano-Fe3O4. The results from scanning electron microscopy (SEM) and X-ray diffraction (XRD) characterisations confirmed the successful doping of nano-Fe3O4 on the biochar with an improved porous structure. The synthesised m-biochar exhibited significantly higher maximum adsorption capacity of 9.92 mg/g compared with that (8.03 mg/g) of the pristine biochar. The adsorption kinetics followed the pseudo-second-order model and the intraparticle diffusion model, which indicated that the overall adsorption rate of Cr(VI) was governed by the processes of chemical adsorption, liquid film diffusion and intramolecular diffusion. The increasing of the pH from 3 to 11 significantly affected the Cr(VI) adsorption, where the capabilities decreased from 9.92 mg/g to 0.435 mg/g and 8.03 mg/g to 0.095 mg/g for the m-biochar and pristine biochar, respectively. Moreover, the adsorption mechanisms of Cr(VI) by m-biochar were evaluated and confirmed to include the pathways of electrostatic adsorption, reduction and complexation. This study highlighted an effective synthesis method to prepare a superior Cr(VI) adsorbent, which could contribute to the effective remediation of heavy metal contaminations in the groundwater.


2021 ◽  
Vol 266 ◽  
pp. 118592
Author(s):  
Hanane Chakhtouna ◽  
Hanane Benzeid ◽  
Nadia Zari ◽  
Abou el kacem Qaiss ◽  
Rachid Bouhfid

ACS Omega ◽  
2021 ◽  
Author(s):  
Tao Liu ◽  
Zhenshan Chen ◽  
Zhixian Li ◽  
Guoliang Chen ◽  
Jianlin Zhou ◽  
...  

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