Conversion of crop, weed and tree biomass into biochar for heavy metal removal and wastewater treatment

Das, Shaon Kumar; Ghosh, Gautam; Avasthe, R. K.

doi:10.1007/s13399-021-01334-y

Cited by 46 publications

(10 citation statements)

References 43 publications

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“…through slow pyrolysis at 600 °C., all collected from a farm in Donghai County, Lianyungang City, Jiangsu Province. This temperature was selected based on previous studies [26,27], at which the produced biochars had a greater sorption capacity for contaminants and better balance between the yield and energy costs. The five raw materials were washed, dried to constant weight in an oven at 105 °C, and ground through a 40 mesh (0.425 mm) sieve using a grinder.…”

Section: Biochar Preparationmentioning

confidence: 99%

Capacity and Mechanisms of Pb(II) and Cd(II) Sorption on Five Plant-based Biochars

Yu¹,

Sun²,

Pei³

et al. 2023

Preprint

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China is a large agricultural country that produces a large amount of crop straw every year. Thus, the development of cost-effective and economic application of invasive plants is warranted. Biochars derived from crop straw has been proven to be promising for adsorbent materials. However, less studies have focused on biochar derived from different types of crop straw as adsorbent under the same conditions to compare their adsorption performance. Here, we characterized the five biochars in the same system (600 ℃). In results, GBC has higher ash content, pH, CEC, specific surface area, mineral composition and oxygen-containing functional groups. The adsorption kinetics can be explained adequately by pseudo-second-order model and Langmuir model, indicating that the adsorption behavior of the biochar is both physical adsorption and chemical adsorption, the adsorption process includes complexation reaction, cationic π bond, ion precipitation and electrostatic adsorption. In conclusion, GBC exhibited higher metal equilibrium adsorption capacities (125 mg·g-1 for Pb2+, 29 mg·g-1 for Cd2+). The solution pH, biochar dosing, pyrolysis temperature and the properties of these heavy metals were responsible for adsorption capacity, thus showing stronger affinity and better adsorption effect. Our results are important for the selection and utilization of plant-based biochar for different heavy metals.

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Section: Biochar Preparationmentioning

confidence: 99%

Capacity and Mechanisms of Pb(II) and Cd(II) Sorption on Five Plant-based Biochars

Yu¹,

Sun²,

Pei³

et al. 2023

Preprint

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show abstract

“…The preparation process involved chopping wood from pomegranate and orange trees into 15 cm-long pieces, oven-drying the feedstock at 70°C, and then burning it inside a kiln at 600°C with a heating rate of 10°C per minute for four hours. The temperature was maintained using an electrically-driven manual switch [36]. After the production, the biochar was dried at 100°C for 24 hours, ground into a fine powder, and sieved through a 4mm sieve.…”

Section: Water Samplingmentioning

confidence: 99%

Fuzzy Inference System in Assessing the Improved Wastewater Quality for Irrigation through Sedimentation, Dilution, and Biochar Filtration in Sulaymaniyah City, Iraq

Hamabor

Fattah

Khwakaram

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The study aims to improve the quality of wastewater in Sulaymaniyah city, Iraq, which has been facing drought problems, by using sedimentation, dilution (1:1), and biochar filtration. It provides an alternative source of water for agriculture, addressing the water shortage problem in the region. The irrigation water quality is evaluated based on the Water Quality Index (WQI) using a fuzzy inference system, a mathematical tool that converts complex statements into mathematical terms and simplifies them into outputs. The centroid defuzzification technique is applied to convert the fuzzy results into crisp numbers. The output of the FIS score is used to determine the suitability of water for irrigation. The study utilized six different samples: groundwater (GW), wastewater (WW), sedimented wastewater (SW), filtered sedimented wastewater (FSW), diluted sedimented wastewater (DSW), and filtered diluted sedimented wastewater (FDSW). The samples were analyzed for their physical and chemical properties, including pH, electrical conductivity (EC), total suspended solids (TSS), turbidity (TUR), total nitrogen (TN), total phosphate (TP), cations (Ca, Na), anions (Cl and SO4), and heavy metals (Mn, Fe, Co, Ni, Zn, Cu). The study found that the WQI FIS-I values for wastewater increased with each treatment step, with the final step of passing the DSW through a biochar filter resulting in an FIS WQI-I value of 61.59, indicating good water quality. The deterministic method also showed improved levels for TP, TN, TSS, and turbidity. Mean TN and TP values decreased to 8.9 mg L-1 and 3.62 mg L-1, respectively, in the FDSW, with turbidity and TSS also decreasing to 0.37 NTU and 21 mg L-1. The resulting FDSW was of the best quality among the treated waters, making it suitable for drip irrigation.

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“…In a comparative study, comparing use of biochar and precipitation methods on HMs in water, biochar proved effective with 100% HMs removal while precipitation method had 75–80% efficiency ( Chughtai and Kashif, 2017 ). Treatment of wastewater with a biochar-biofilter resulted in an improved physicochemical property of the wastewater and a great reduction in the HMs (Cd, Cr, As, Pb, Zn, Cu) concentration ( Das et al., 2021b ). Thallium was effectively removed from wastewater using biochar from watermelon rinds ( Li et al., 2019a ); Pb and Cd ions removed by coffee husk biochar ( Quyen et al., 2021 ); Pb, Fe, Cd, and Cu ions removed by rice husk biochar ( Roha et al., 2021 ; Sanka et al., 2020 ); sunflower seed husk biochar removed Cu ions ( Saleh et al., 2016 ); coconut shell biochar adsorbed Pb and Cd in wastewater ( Wu et al., 2021 ); and paper mill sludge biochar removed As, Zn, and Cu from wastewater ( Xu et al., 2021 ).…”

Section: Biochar Influence On Ptes Contamination-related Co-selection...mentioning

confidence: 99%

Biochar can mitigate co-selection and control antibiotic resistant genes (ARGs) in compost and soil

Ejileugha¹

2022

Heliyon

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Conversion of crop, weed and tree biomass into biochar for heavy metal removal and wastewater treatment

Cited by 46 publications

References 43 publications

Capacity and Mechanisms of Pb(II) and Cd(II) Sorption on Five Plant-based Biochars

Capacity and Mechanisms of Pb(II) and Cd(II) Sorption on Five Plant-based Biochars

Fuzzy Inference System in Assessing the Improved Wastewater Quality for Irrigation through Sedimentation, Dilution, and Biochar Filtration in Sulaymaniyah City, Iraq

Biochar can mitigate co-selection and control antibiotic resistant genes (ARGs) in compost and soil

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