Chemical modification of bamboo activated carbon surface and its adsorption property of simultaneous removal of phosphate and nitrate

Shao, Yongfu; Li, Jianmin; Fang, Xiuying; Yang, Zhie; Qu, Yuelin; Yang, Min; Tan, Wei; Li, Guizhen; Wang, Hongbin

doi:10.1016/j.chemosphere.2021.132118

Cited by 67 publications

(16 citation statements)

References 21 publications

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“…Consistently, the reduction in the number of oxygen-containing groups was supported by FT-IR spectroscopy. In the FT-IR spectra (Figure S16), the peaks at 3430, 1571, 1041, and 873 cm –1 were assigned to O–H stretching vibration, CC skeleton vibration, C–O–C symmetrical stretching vibration, and benzene ring CH in-plane deformation, , respectively. All vibration peaks were slightly weakened after treatment, indicating a decrease in the number of oxygen-containing functional groups .…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Adsorption Performance of 2-Methylisoborneol by Activated Carbon by Promoting Hydrophobic Effects

Yang

Wang

et al. 2022

ACS EST Water

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Powdered activated carbon (PAC) is the most widely used adsorbent for removing odorants like 2-methylisoborneol (MIB) for drinking water purification. The hydrophobicity exhibited by the moieties of the carbon structure is known to be important for the adsorption of activated carbon. Here we propose a novel approach for regulating the hydrophobicity of the carbon surface by rearranging carbon atoms without changing the pore structures markedly through thermal transformation using Fe-(NO 3 ) 3 as the catalyst. Five different PACs were transformed into hydrophobic porous carbons (HPCs) with 2.47−3.00 times the adsorption capacity and faster adsorption rates, accompanied by the surface free energy being decreased by 26.67−36.40%, the I G2 / I G1 representing the degree of order being increased by 17.31− 53.68%, the C−C(sp 2 )/C−C(sp 3 ) being increased by 31.9−49.8%, and the oxygen content being decreased by 4.71−8.63%. The increase in ordered planar crystals dominated by sp 2 carbons as well as the decrease in the number of heteroatoms in HPCs might be the main reason for its enhanced adsorption of MIB. Simulation based on reactive force field molecular dynamics indicated that MIB molecules tended to be adsorbed in ordered structures. This study provides a novel angle for improving the surface hydrophobicity of activated carbon, which may lead to the development of high-performance adsorbents.

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Section: Resultsmentioning

confidence: 99%

Enhancing the Adsorption Performance of 2-Methylisoborneol by Activated Carbon by Promoting Hydrophobic Effects

Yang

Wang

et al. 2022

ACS EST Water

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“…Utilizing an adsorbent is a great method for treating low‐concentration phosphorus sewage. Due to its qualities such as light weight, well‐developed pores, structural stability, simplicity of use, and renewable consumption (Xu et al, 2008), ceramsite has attracted more interest in the fields of wastewater denitrification (Shao, Li, et al, 2022), phosphorus and fluoride removal (Wang et al, 2018), and oily wastewater treatment (Negi et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of nitrogen and phosphorus from wastewater by modified sludge/biomass ash ceramsite: Preparation, adsorption mechanism, and sustainable analysis

Shen

Zhou

et al. 2023

Water Environment Research

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Excessive ammonium and phosphate in aquatic settings may produce major eutrophication. Adsorbents can be used to reduce the eutrophication of natural water bodies. In this study, a sustainable and efficient ceramic adsorbent (sludge/biomass ash ceramsite [SBC]) was prepared by using sludge and biomass ash with a weight ratio of 1:1; the sintering parameters were 1070°C for 15 min. The NH4+‐N and P adsorption capabilities were improved by utilizing 1 mol L−1 NaOH and 1.6 mol L−1 La(NO3)3·6H2O for modification. When the pH and duration were 7 and 1440 min, respectively, the maximum bending capacity of ammonia nitrogen and phosphorus was 3.2 and 2.1 mg g−1 at 308 K. The pseudo‐second‐order kinetic model better describes the adsorption dynamics of NH4+‐N and P, whereas the Langmuir model better describes the adsorption isotherm models of NH4+‐N and P. The adsorption mechanism of SBC‐NaOH on NH4+‐N is ion exchange between Na+ and NH4+, whereas the adsorption mechanism of SBC‐La on phosphorus is ion exchange and La3+ adsorption. SBC combines efficient wastewater purification with the reuse of solid waste. The findings gave rise to the possibility of recycling ceramics as a plant fertilizer with a delayed release in the future. Practitioner Points New ceramsite was made from sludge and biomass ash. NH4+‐N (3.2 mg g−1) and P (2.1 mg g−1) were effectively adsorbed by ceramsite. The mechanism of NH4+‐N and P adsorption by ceramsite was studied. Absorbed ceramsite can be used as slow‐release fertilizer in plant cultivation.

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“…In this regards, various nanomaterials have been used as adsorbents for nitrate removal including carbon nanotubes (CNTs), 16,17 graphen oxide (GO) 18,19 and activated carbon 20–22 which showed a maximum removal rate. For example, the removal efficiency of nitrate by a functionalized bamboo activated carbon was ranged between 34.08% and 93.70% 21 . Magnetic graphene oxide modified with strontium nanoparticles showed also a high nitrate uptake capacity of 77% (126.91 mg/g) 19 .…”

Section: Introductionmentioning

confidence: 99%

“…For example, the removal efficiency of nitrate by a functionalized bamboo activated carbon was ranged between 34.08% and 93.70%. 21 Magnetic graphene oxide modified with strontium nanoparticles showed also a high nitrate uptake capacity of 77% (126.91 mg/g). 19 In another research, magnetic carbon nanotubes and carbon nanotubes functionalized with mesoporous silica-nitrenium ions attained a maximal loading capacity of 183.11 and 112 mg/g, respectively.…”

mentioning

confidence: 97%

“…13 Among the treatment technologies, adsorption method was gained growing importance due to its economical, high efficiency, uncomplicated equipment required and good reliability. 12,14,15 In this regards, various nanomaterials have been used as adsorbents for nitrate removal including carbon nanotubes (CNTs), 16,17 graphen oxide (GO) 18,19 and activated carbon [20][21][22] which showed a maximum removal rate. For example, the removal efficiency of nitrate by a functionalized bamboo activated carbon was ranged between 34.08% and 93.70%.…”

mentioning

confidence: 99%

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Preparation and application of a surfactant‐modified Halloysite nanotubes for the adsorption of nitrates from aqueous solutions: Kinetic and equilibrium studies

Fizir

Richa

Touil

et al. 2022

Env Prog and Sustain Energy

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The current research proposes the hexadecyltrimethylammonium bromide-modified Algerian halloysite nanotubes (HNTs-CTAB) as adsorbent for nitrate ions removal from aqueous solution via electrostatic interactions. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Fouriertransform infrared spectroscopy (FT-IR), and nitrogen adsorption-desorption analysis techniques have been used to characterize the prepared adsorbants. The different operating condition that may affect the adsorption of nitrate was carried out. HNTs and HNTs-CTAB adsorption capacities are considerably pH dependent. The optimum conditions for maximum removal of nitrate from aqueous solution were as follows:adsorbent masse was 40 mg, initial pH was 4, temperature was 25 C, initial nitrate concentration of 100 mg/L and equilibrium time was 3 h. Under optimal value of process parameters, maximum NO 3 À adsorption capacity of 47.4 mg/g was obtained.Kinetic investigation confirmed that the nitrate adsorption on modified HNTs followed a pseudo-second-order with correlation coefficients greater than 0.98 (R 2 = 0.9870) and that empirical Freundlich isotherm was best fitted nitrate equilibrium adsorption. The thermodynamic studies indicated that the adsorption of nitrate onto HNTs-CTAB is endothermic and spontaneous. HNTs-CTAB displayed high regeneration ability by retaining a capacity above 40 mg/g after four reuse cycles.HNTs-CTAB containing plentiful nitrate could be returned to the soil directly as an economic slow release fertilizers or a soil amendment due to its environmentalfriendly performance. Therefore, HNTs-CTAB used for remediation of wastewater might be employed easily as farmland fertilizer.

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Chemical modification of bamboo activated carbon surface and its adsorption property of simultaneous removal of phosphate and nitrate

Cited by 67 publications

References 21 publications

Enhancing the Adsorption Performance of 2-Methylisoborneol by Activated Carbon by Promoting Hydrophobic Effects

Enhancing the Adsorption Performance of 2-Methylisoborneol by Activated Carbon by Promoting Hydrophobic Effects

Adsorption of nitrogen and phosphorus from wastewater by modified sludge/biomass ash ceramsite: Preparation, adsorption mechanism, and sustainable analysis

Preparation and application of a surfactant‐modified Halloysite nanotubes for the adsorption of nitrates from aqueous solutions: Kinetic and equilibrium studies

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