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Table 7

Comparison of adsorption capacities of crab shell CTS and the CTS:PVA (1:2) composite for nitrate and phosphate ions

AdsorbentNitrate adsorption capacity (mg/g)Phosphate adsorption capacity (mg/g)References
Polyethylene glycol/chitosan 50.68 74.85 Rajeswari et al. (2015, 2016)  
PVA/chitosan 35.03 46.19 
Al-modified biochar 89.58 57.49 Yin et al. (2018)  
Magnetic cationic hydrogel 95.88 – Li et al. (2020a)  
Quaternized chitosan-zeolite-glutaraldehyde beads 62.23 – He et al. (2020)  
Anionic bio-graphene nanosheet 182.51 – Ghadiri et al. (2017)  
Mg and Al modified biochars – 153.40 Zheng et al. (2020)  
Chitosan/Fe3+ – 48.6 Zhang et al. (2018)  
Crosslinked chitosan/Fe3+ – 31.6 
Lanthanum-coated biochar – 93.91 Li et al. (2020b)  
Crab shell CTS 122.0 344.8 This work 
CTS/PVA (1:2) composite 135.1 384.6 This work 
AdsorbentNitrate adsorption capacity (mg/g)Phosphate adsorption capacity (mg/g)References
Polyethylene glycol/chitosan 50.68 74.85 Rajeswari et al. (2015, 2016)  
PVA/chitosan 35.03 46.19 
Al-modified biochar 89.58 57.49 Yin et al. (2018)  
Magnetic cationic hydrogel 95.88 – Li et al. (2020a)  
Quaternized chitosan-zeolite-glutaraldehyde beads 62.23 – He et al. (2020)  
Anionic bio-graphene nanosheet 182.51 – Ghadiri et al. (2017)  
Mg and Al modified biochars – 153.40 Zheng et al. (2020)  
Chitosan/Fe3+ – 48.6 Zhang et al. (2018)  
Crosslinked chitosan/Fe3+ – 31.6 
Lanthanum-coated biochar – 93.91 Li et al. (2020b)  
Crab shell CTS 122.0 344.8 This work 
CTS/PVA (1:2) composite 135.1 384.6 This work 
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