Ammonium removal from groundwater using peanut shell based modified biochar: Mechanism analysis and column experiments

An, Qiang; Li, Zheng; Zhou, Ying; Meng, Fanyu; Zhao, Bin; Miao, Yue; Deng, Shuman

doi:10.1016/j.jwpe.2021.102219

Cited by 29 publications

(8 citation statements)

References 53 publications

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“…Pre-treatment for biochar with FeCl3 and HCl solutions showed an increase in adsorption capacity of 17%, while an increase of 14% for treatment only with FeCl3 [63]. In addition, modifying peanut shell-based biochar using KMnO4 and KOH increased its adsorption capacity to 6.92 mg/g from 3.83 mg/g for unmodified biochar [51]. The modified peanut shell-based biochar was applied for dynamic adsorption with a fixed bed column showing the NH4 + removal rate of 77.3% for a flow rate of 1 mL/min.…”

Section: Potential Methods For Ammonium Removal Using Natural-based M...mentioning

confidence: 95%

“…In addition, different adsorbent materials have different adsorption capabilities. Many materials have been used for the adsorption of NH4 + , such as zeolite, natural clay, biochar, activated carbon, resin, and composite materials [49][50][51][52][53][54]. However, natural-based materials are promising due to their abundance and being environmentally friendly.…”

Section: Potential Methods For Ammonium Removal Using Natural-based M...mentioning

confidence: 99%

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Evaluation of ammonium issues in Indonesian groundwater: Potential sources and removal methods

Fahmi,

Rohman,

Ahsan

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Elevated concentration of ammonium (NH4 +) has been identified as one of the problems with groundwater because it indicates anthropogenic disturbance. In this study, we evaluated the NH4 + presence in Indonesian groundwater and the land-use conditions possibly related to the issues. In addition, this research presents practical strategies for reducing NH4 + concentrations in groundwater. The spatial distribution shows that high levels of NH4 + are found in densely populated areas. Furthermore, land-uses analysis reveals that considerable concentrations of NH4 + were found in several land-uses, including settlement, agricultural, fishpond, industrial, and garbage disposal, reaching 24.16, 7.73, 16.7, 7.42, and 84.9 mg/L, respectively. However, the statistical analysis shows that not all land-uses types significantly correlated with groundwater NH4 + contents. Based on the p-value and confidence interval of 95%, NH4 + concentrations are significantly correlated with settlements, brackishwater ponds, and garbage disposal. Similarly, industrial and agricultural land-uses have positive correlations with NH4 + concentrations, although these correlations are insignificant. Finally, the promising methods for NH4 + removal are the adsorption and ion exchange methods using zeolite or biochar, which could reduce NH4 + levels by 90% and more. Furthermore, these methods do not require complicated application procedures.

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Section: Potential Methods For Ammonium Removal Using Natural-based M...mentioning

confidence: 95%

Section: Potential Methods For Ammonium Removal Using Natural-based M...mentioning

confidence: 99%

Evaluation of ammonium issues in Indonesian groundwater: Potential sources and removal methods

Fahmi,

Rohman,

Ahsan

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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show abstract

“…It is an environmentally friendly and low-cost potential alternative material. It is widely used to remove ammonium nitrogen from eutrophic water bodies [ 23 ]. However, due to the low specific surface area, porosity and less oxygen-containing surface functional groups of biochar prepared by ordinary methods [ 14 ], its ability to adsorb ammonium nitrogen is significantly lower than that of biochar adsorbent prepared by pyrolysis [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

A study on and adsorption mechanism of ammonium nitrogen by modified corn straw biochar

et al. 2023

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Using corn stover as raw material, the adsorption mechanism of ammonium nitrogen by biochar prepared by different modification methods was studied. The biochar was characterized by Fourier transform infrared spectroscopy, surface-area analysis and scanning electron microscopy. The results showed that the adsorption of NH 4 + − N by different modified biochars confirmed the quasi-second-order kinetic equation ( R 2 > 0.95, p ≤ 0.05), the adsorption isotherms of the Langmuir equation ( R 2 ≥ 0.96, p ≤ 0.05). Δ G θ < 0, Δ H θ > 0 indicated that the adsorption of NH 4 + − N by different modified biochars was a spontaneous endothermic reaction. With the increase in adsorption temperature, the adsorption capacity of biochar to ammonium nitrogen increased gradually. The adsorption was monolayer adsorption and was controlled by a fast reaction. Both KOH and FeCl 3 modified biochars significantly improved the adsorption capacity of NH 4 + − N , and the adsorption mechanism was different. The adsorption capacity of NH 4 + − N by FeCl 3 modified biochars mainly increased the specific surface area and micropore volume. The adsorption of ammonium nitrogen after KOH modification primarily depended on the wealthy oxygen-containing functional groups. The adsorption effect of ammonium nitrogen modified by KOH was better than that of biochar modified by FeCl 3 .

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“…5.4 Received: July 19, 2023; accepted: September 18, 2023 eliminating ammonium has been rising intensively. For instance, Qiang et al [11] synthesized a novel modified biochar utilizing the peanut shell. Under the initial ammonium concentration of 30 mg/L in the dynamic column study, the maximum adsorptive capacity reached 9.02 mg NH4 + /g.…”

Section: Introductionmentioning

confidence: 99%

Utilizing Coffee Husk Biochar as an Effective Adsorbent for Ammonium Removal in Groundwater

2023

JST: ETSD

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The study investigated the performance of a novel biochar derived from coffee husks (BCFH) and its alkaline-activated product (BCFH-NaOH) for ammonium removal in the aqueous solution. Several batch experiments were conducted with the synthetic solution to determine the adsorption properties of the biochars. At the initial ammonium concentration of 50 mg/L, the optimal dosage for both materials was 10 g/L, while the ideal pH range was 4-9. The equilibration adsorption time on both materials is within 30 minutes, indicating their high practical applicability. Both the pseudo-first order and pseudo-second order kinetic were applied successfully to describe the adsorption kinetics (R2 >0.95). The isotherms can be defined by both Langmuir and Freundlich models, showing that ammonium removal by biochars is a complex process. BCFH-NaOH showed better performance, with the maximum adsorption capacity reaching 9.97 mg-NH4/g, compared to 6.64 mg-NH4/g of BFCH. Finally, BCFH-NaOH was tested with a practical groundwater sample (Co = 11.5 mg-NH4/L), achieving a sorption efficiency of up to 80 % while eliminating most of the hardness. These results show that the modified coffee husk biochar could be applied as a low-cost, environmentally friendly adsorbent for ammonium removal.

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Ammonium removal from groundwater using peanut shell based modified biochar: Mechanism analysis and column experiments

Cited by 29 publications

References 53 publications

Evaluation of ammonium issues in Indonesian groundwater: Potential sources and removal methods

Evaluation of ammonium issues in Indonesian groundwater: Potential sources and removal methods

A study on and adsorption mechanism of ammonium nitrogen by modified corn straw biochar

Utilizing Coffee Husk Biochar as an Effective Adsorbent for Ammonium Removal in Groundwater

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