scholarly journals Application of Modified Spent Mushroom Compost Biochar (SMCB/Fe) for Nitrate Removal from Aqueous Solution

Toxics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 277
Author(s):  
Negisa Darajeh ◽  
Hossein Alizadeh ◽  
David Leung ◽  
Hamid Rashidi Nodeh ◽  
Shahabaldin Rezania ◽  
...  

The public is already aware that nitrate pollution caused by nutrient runoff from farms is harmful to aquatic life and human health, and there is an urgent need for a product/technology to solve this problem. A biochar adsorbent was synthesized and used to remove nitrate ions from aqueous media based on spent mushroom compost (SMC), pre-treated with iron (III) chloride hexahydrate and pyrolyzed at 600 °C. The surface properties and morphology of SMCB/Fe were investigated using Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The effect of main parameters such as the adsorbent dosages, pH of the solutions, contact times, and ion concentrations on the efficiency of nitrate removal was investigated. The validity of the experimental method was examined by the isothermal adsorption and kinetic adsorption models. The nitrate sorption kinetics were found to follow the pseudo-second-order model, with a higher determination coefficient (0.99) than the pseudo-first-order (0.86). The results showed that the maximum percentage of nitrate adsorption was achieved at equilibrium pH 5–7, after 120 min of contact time, and with an adsorbent dose of 2 g L−1. The highest nitrate adsorption capacity of the modified adsorbent was 19.88 mg g−1.

Author(s):  
N. D. Suzaimi ◽  
P. S. Goh ◽  
N. A. N. N. Malek

Excessive nitrate discharge into the aquatic environment from human activities is the main contributor to groundwater and surface water contamination. Its toxicity in water is a serious concern as it gives huge impacts on aquatic life since it damages the ecosystem and water sources around the globe. Recently, the development of nanomaterials as nano-adsorbent makes adsorption the most attractive solution among them. Nano-adsorbents pose high efficiency to remove pollutants from aqueous media. The exclusive chemical and structural properties of the developed nano-adsorbents are the determinative effects of nitrate adsorption performance. In this mini review, the state-of-the-art development of nano-adsorbents and nano-adsorbents-modified membranes for nitrate from water is discussed, and some challenges faced in this field are also highlighted.


2022 ◽  
Vol 146 ◽  
pp. 101-102
Author(s):  
Juliana Marques Ferreira ◽  
Fabio Ribeiro Braga ◽  
Filippe Elias de Freitas Soares

2016 ◽  
Vol 45 (6) ◽  
pp. 281-287 ◽  
Author(s):  
Shen-Chang Chang ◽  
Min-Jung Lin ◽  
Yun-Peng Chao ◽  
Chung-Jen Chiang ◽  
Yu-Shine Jea ◽  
...  

2014 ◽  
Vol 6 (7) ◽  
Author(s):  
E. L. S. Marques ◽  
E. T. Martos ◽  
R. J. Souza ◽  
R. Silva ◽  
D. C. Zied ◽  
...  

1996 ◽  
Vol 89 (5) ◽  
pp. 1267-1280 ◽  
Author(s):  
K. A. Stoner ◽  
F. J. Ferrandino ◽  
M. P. N. Gent ◽  
W. H. Elmer ◽  
J. A. Lamondia

2020 ◽  
Vol 13 (02) ◽  
pp. 164
Author(s):  
Untung Sudadi ◽  
Syaiful Anwar ◽  
Rendy Anggriawan ◽  
Tengku Afrizal

Land application of liquid waste containing palm oil mill effluent (LW-POME) as soil ameliorant can cause water contamination due to its high content of nitrate if improperly treated. Indonesia is rich with volcanic tuff materials that contain variable charged soil clay minerals. This study was aimed at to extract nanoclays (fraction sized <200 nm) from volcanic tuffs of Mt. Salak, West Java, Indonesia, and evaluate their potential use as adsorbent of nitrate in LW-POME. By applying dispersion, ultrasonication, centrifugation, and dialysis separation techniques, it could be extracted positively charged nanoclays nc3 and nc4 from the respectively tuff materials tv3 and tv4. Their potential use as natural adsorbent of nitrate as anionic contaminant was evaluated using Langmuir isothermal adsorption model. After 48 h equilibration, it could be extracted 4.33 mg nc3/g tv3 and 7.73 mg nc4/g tv4 with nitrate adsorption maxima of 48.3 and 40 mg/g for nc3 and nc4, respectively. The removal of nitrate in the LW-POME from 62 to 20 mg/L as to comply with the Indonesian liquid waste quality standard required 29.81 mg nc3/L or 39.34 mg nc4/L. The extracted nanoclays were considered prospective to be utilized as natural adsorbent for nitrate removal in LW-POME. Keywords: anionic contaminant, natural adsorbent, nitrate adsorption, volcanic tuff


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