High capacity Pb(II) adsorption characteristics onto raw- and chemically activated waste activated sludge

Veenhuyzen, B. van; Tichapondwa, Shepherd Masimba; Horstmann, Carla; Chirwa, Evans M.N.; Brink, Hendrik Gideon

doi:10.1016/j.jhazmat.2021.125943

Cited by 35 publications

(19 citation statements)

References 91 publications

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“…The two methods were combined in this paper to obtain better carboxylation effect [ 15 , 16 ]. The preparation of sodium periodate carboxylated nanocellulose was according to Liu [ 17 ], the cellulose was uniformly dispersed in a deionized water solution containing 5% NaIO 4 and 7.6% CaCl 2 , adjusted the pH to 3.5 and reacted for 6 h at 318 K. The reaction was terminated by adding ethylene glycol [ 18 ], followed by washing, three times, with deionized water, and centrifugation. Then, the ammonium persulfate was used for further carboxylated [ 19 , 20 ], and the NC was dispersed in 2 M ammonium persulfate solution, sonicated at 333 K for 6 h, and mixed with 200 mL of 1 M citric and continued sonication for 4 h. The carboxylated NC was washed three times with deionized water and centrifuged.…”

Section: Methodsmentioning

confidence: 99%

Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water

Yang

Luo

Wang

2022

Foods

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Water is an important raw material in the food production process. Maintaining the quality and safety of water is very important in the food field. In this study, a simple novel fluorescent nanocellulose hydrogel (FNH) was prepared for the detection and removal of heavy metals (Fe3+ and Pb2+) in aqueous solutions based on carbon dots (CDs). The CDs were grafted onto the carboxylated nanocellulose (CNC) by the EDC/NHS coupling method, and then the nanocellulose (NC), CNC, and FNH were characterized by FTIR analysis. The effect of adsorption environment on FNH adsorption capacity was also investigated. After carboxylation and grafting of CDs, the adsorption capacity of nanocellulose to Fe3+ and Pb2+ was greatly improved, and it was also allowed to make fast visual responses to Fe3+ as an optical sensor to determine the concentration of Fe3+ through the visual signal. Static adsorption experiment demonstrated that the removal rate of Fe3+ and Pb2+ by FNH exceeded 69.4% and 98.2%, and the adsorption capacity amount reached 98.3 mg/g and 442.0 mg/g. At the same time, due to the fluorescence quenching effect of Fe3+, FNH could also be used for the detection of Fe3+ concentration in aqueous solution, and the limit of detection (LOD) could reach 62.5 mg/L.

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Section: Methodsmentioning

confidence: 99%

Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water

Yang

Luo

Wang

2022

Foods

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“…is the maximum saturated monolayer sorption capacity, K L (L•mg −1 )is the Langmuir sorption equilibrium constant related to the affinity between the adsorbent and the adsorbent, and Ce is the equilibrium concentration of Mn(II) in solution (mg•L −1 ) [29].…”

Section: Sorption Thermodynamic Modelsmentioning

confidence: 99%

Mn(II) Sorption on Stream Sediments Sampled in Manganese Mining Area: Dynamics and Mechanisms

Yang

Tang

et al. 2022

Applied Sciences

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The stream sediments that have been impacted by manganese (Mn) containing wastewater for decades contain not only abundant microorganisms but also organic/inorganic substances. To achieve effective treatment of manganese (Mn)-containing effluent and recovery of Mn from water/sediments, the Mn(II) sorption behaviors and mechanism on sediments of a stream in Mn mining areas were studied. In addition, the study analyzed the effects of various factors (initial concentration, solution pH, sediment dose, contact time, and coexisting cations) on the Mn sorption efficiency of Daxin sediments, and explored the contribution of microbial activity in the sediment sorption of Mn(II). The results showed that the sorption process of Mn(II) on the sediments was consistent with the Elovich and Freundlich models, and the removal of heavy metals was maximum at 40 °C (62.47–98.93%), pH = 8 (77.51%), initial concentration of 1 mmol·L−1 (95.37%) and sediment dosing of 12 g·L−1 (98.93%). The addition of 50 mM NaN3 inhibited the microbial activity in the Daxin sediment, reducing the sorption and removal rates of Mn(II) by 0.605 mg·g−1 and 8.92%, respectively. After sorption, the proportion of the Fe–Mn oxidation(iron–manganese) state in Daxin sediments decreased from 54% to 43%, while the proportion of the exchangeable state increased by 10.80%. Microorganisms in the sediment had a positive effect on inhibiting heavy metal migration and reducing the bioavailability of contaminants in the soil. Through this study, we hope to further understand the sorption and desorption mechanism of manganese by stream sediments in manganese ore areas, so as to provide a guide on the management and recovery of Mn from stream sediments in manganese mining areas.

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“…As a result of the food chain, they can readily accumulate in living creatures [21]. Humans face a variety of health hazards because of this [34]. Long-term consumption of contaminated water, for example, can harm internal organs in the human body and cause a variety of diseases, even at trace levels, which is why metal ions in drinking water have such low permissible values (e.g., 0.005 mg L −1 for Cd, 0.01 mg L −1 for Pb, 0.02 mg L −1 for Ni, 1.0 mg L −1 for Cu and Co) [35,36].…”

Section: Removal Of Heavy Metalsmentioning

confidence: 99%

A Review on Promising Membrane Technology Approaches for Heavy Metal Removal from Water and Wastewater to Solve Water Crisis

Batouti

Al‐Harby

Elewa

2021

Water

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Due to the impacts of water scarcity, the world is looking at all possible solutions for decreasing the over-exploitation of finite freshwater resources. Wastewater is one of the most reliable and accessible water supplies. As the population expands, so do industrial, agricultural, and household operations in order to meet man’s enormous demands. These operations generate huge amounts of wastewater, which may be recovered and used for a variety of reasons. Conventional wastewater treatment techniques have had some success in treating effluents for discharge throughout the years. However, advances in wastewater treatment techniques are required to make treated wastewater suitable for industrial, agricultural, and household use. Diverse techniques for removing heavy metal ions from various water and wastewater sources have been described. These treatments can be categorized as adsorption, membrane, chemical, or electric. Membrane technology has been developed as a popular alternative for recovering and reusing water from various water and wastewater sources. This study integrates useful membrane technology techniques for water and wastewater treatment containing heavy metals, with the objective of establishing a low-cost, high-efficiency method as well as ideal production conditions: low-cost, high-efficiency selective membranes, and maximum flexibility and selectivity. Future studies should concentrate on eco-friendly, cost-effective, and long-term materials and procedures.

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High capacity Pb(II) adsorption characteristics onto raw- and chemically activated waste activated sludge

Cited by 35 publications

References 91 publications

Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water

Novel Fluorescent Nanocellulose Hydrogel Based on Nanocellulose and Carbon Dots for Detection and Removal of Heavy Metal Ions in Water

Mn(II) Sorption on Stream Sediments Sampled in Manganese Mining Area: Dynamics and Mechanisms

A Review on Promising Membrane Technology Approaches for Heavy Metal Removal from Water and Wastewater to Solve Water Crisis

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