Comparing the effects of humic acid and oxalic acid on Pb(II) immobilization by a green synthesized nanocrystalline hydroxyapatite

Wei, Wei; Han, Xuan; Shao, Yang; Xie, Wei; Zhang, Yong; Yao, Yijun; Wei, Zhao; Han, Ruiming; Li, Shiyin; Chen, Kewei

doi:10.1016/j.chemosphere.2021.131411

Cited by 23 publications

(5 citation statements)

References 86 publications

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“…ATR-IR results showed ( Figure 4B ) that the cell sediment under Pb stress increased the peak position related to PO 4 3− at 565 cm −1 , 603 cm −1 , 965 cm −1 ( Botto et al, 1997 ; Wei et al, 2021 ). In addition, the O-C-O stretching vibration peak of 782 cm −1 ( Mancilla et al, 2009 ) and the C-O bond peak of 1289 cm −1 , 1312 cm −1 , 1386 cm −1 were enhanced ( Mancilla et al, 2009 ; Salavati-Niasari et al, 2009 ).…”

Section: Resultsmentioning

confidence: 99%

Isolation and screening of phosphorus solubilizing bacteria from saline alkali soil and their potential for Pb pollution remediation

Zhang

Chen²,

Dai³

et al. 2023

Front. Bioeng. Biotechnol.

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The high pH and salinity of saline alkali soil not only seriously restrict the growth of crops, but also aggravate the pollution of heavy metals. The fixation of heavy metals and the regulation of pH by phosphorus solubilizing microorganisms may become a new way to repair heavy mental and improve saline alkali soil. In this study, a saline-alkali resistant bacteria (CZ-B1, CGMCC No: 1.19458) was screened from saline-alkali soil, and its tolerance to salt/alkali/lead stress was investigated by shaking flask experiment. The strain was identified as Bacillus amyloliquefaciens by morphology and 16S rRNA gene sequence analysis. The optimum growth temperature of CZ-B1 is about 35°C–40℃. The maximum salt stress and pH that it can tolerance are 100 g/L and 9 respectively, and its tolerance to Pb2+ can reach 2000 mg/L. The phosphorus release amount of CZ-B1 to Ca3(PO4)2 within 72 h is 91.00–102.73 mg/L. The phosphate solubilizing index in PVK agar medium and NBRIP agar medium are more than 2, which can be defined as phosphate solubilizing bacteria. Moreover, the dissolution of CZ-B1 to phosphorus is mainly attributed to tartaric acid, citric acid and succinic acid in inorganic medium. In addition, the removal rate of Pb2+ by CZ-B1 can reach 90.38% for 500 mg/L. This study found that CZ-B1 can immobilize Pb through three biological mechanisms (organic acid, extracellular polymers and mineralization reaction). The release of succinic acid (10.97 g/L) and citric acid (5.26 g/L) may be the main mechanism to promote the mineralization reaction of CZ-B1 (phosphate and oxalate) and resistance to Pb stress. In addition, the high enrichment of Pb2+ by EPS can increase the rate of extracellular electron transfer and accelerate the mineralization of CZ-B1. The screening and domestication of saline-tolerant phosphorus-solubilizing bacteria not only help to remediate Pb contamination in saline soils, but also can provide P element for plant growth in saline soil.

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Section: Resultsmentioning

confidence: 99%

Isolation and screening of phosphorus solubilizing bacteria from saline alkali soil and their potential for Pb pollution remediation

Zhang

Chen²,

Dai³

et al. 2023

Front. Bioeng. Biotechnol.

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“…This is related to the stability of lead oxalate. It has been demonstrated and observed that lead oxalate is a stable phase in the presence of oxalate over a wide range of environments [12,46]. Therefore, oxalic acid The carbonate-bearing solutions that can be used for desulphurization of lead sulfates include NaHCO 3 alone, mixtures of NaHCO 3 and Na 2 CO 3 , Na 2 CO 3 alone, and (NH 4 ) 2 CO 3 solutions.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Recycling of Lead Pastes from Spent Lead–Acid Batteries: Thermodynamic Constraints for Desulphurization

Xiong

2022

Recycling

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Lead–acid batteries are important to modern society because of their wide usage and low cost. The primary source for production of new lead–acid batteries is from recycling spent lead–acid batteries. In spent lead–acid batteries, lead is primarily present as lead pastes. In lead pastes, the dominant component is lead sulfate (PbSO4, mineral name anglesite) and lead oxide sulfate (PbO•PbSO4, mineral name lanarkite), which accounts for more than 60% of lead pastes. In the recycling process for lead–acid batteries, the desulphurization of lead sulfate is the key part to the overall process. In this work, the thermodynamic constraints for desulphurization via the hydrometallurgical route for recycling lead pastes are presented. The thermodynamic constraints are established according to the thermodynamic model that is applicable and important to recycling of lead pastes via hydrometallurgical routes in high ionic strength solutions that are expected to be in industrial processes. The thermodynamic database is based on the Pitzer equations for calculations of activity coefficients of aqueous species. The desulphurization of lead sulfates represented by PbSO4 can be achieved through the following routes. (1) conversion to lead oxalate in oxalate-bearing solutions; (2) conversion to lead monoxide in alkaline solutions; and (3) conversion to lead carbonate in carbonate solutions. Among the above three routes, the conversion to lead oxalate is environmentally friendly and has a strong thermodynamic driving force. Oxalate-bearing solutions such as oxalic acid and potassium oxalate solutions will provide high activities of oxalate that are many orders of magnitude higher than those required for conversion of anglesite or lanarkite to lead oxalate, in accordance with the thermodynamic model established for the oxalate system. An additional advantage of the oxalate conversion route is that no additional reductant is needed to reduce lead dioxide to lead oxide or lead sulfate, as there is a strong thermodynamic force to convert lead dioxide directly to lead oxalate. As lanarkite is an important sulfate-bearing phase in lead pastes, this study evaluates the solubility constant for lanarkite regarding the following reaction, based on the solubility data, PbO•PbSO4 + 2H+ ⇌ 2Pb2+ + SO42− + H2O(l).

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“…OA is a strong chelating effect forming chelates with Pb 2+ , hence, decreases the oxidative peak current. It was reported previously, that Cu 2+ detection was interfered in presence of OA using nanoscale hydroxyapatite (nHAP, Ca 10 (PO 4 ) 6 (OH) 2 ) modified electrode due to the formation of strong coordinating bond between OA and Cu 2+ , which significantly lowered the concentration of Cu 2+ and further inhibited the ion exchange between Ca of nHAP and Cu 2+ [51]. Interesting to observe that a wide range of cations do not interfere with the Pb 2+ detection which points to the potential of Ag(NPs)/ChS/GC in the efficient detection of Pb 2+ from aqueous medium.…”

Section: Interference Studymentioning

confidence: 99%

Greener synthesis of novel nanocomposite material for efficient and selective trace detection of Pb2+: Insights of stability and real implications of fabricated electrode

Sarikokba

Lalhmunsiama

Lalmalsawmi

et al. 2023

Environmental Engineering Research

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This work reports the use of highly efficient nanocomposite material fabricated glassy carbon electrode (Ag(NPs)/ChS/GC) in the trace detection of Pb2+ using differential pulse voltammetry (DPV). A facile method yielded the silane-grafted chitosan (ChS) using 3-trimethoxyoctylsilane, and the bioderived Ag(NPs) was in situ decorated on the ChS composite to obtain Ag(NPs)/ChS. X-ray Diffraction (XRD) results showed the presence of Ag(NPs) within the composite material. Spherical-shaped and uniform distribution of Ag(NPs) were observed in SEM and TEM images of the nanocomposite solid. The cyclic voltammetric studies revealed a significant increase in redox peak currents (i.e., 0.1283 mA), which was obtained using the Ag(NP)/ChS/GC compared to the bare glassy carbon electrode. Further, the electrochemical determination of Pb2+ showed good linearity in anodic peak current and Pb2+ concentrations (5.0-80.0 μg/L), and the limit of detection was 1.97 μg/L. With 10-fold increase in several cationic and anionic interfering ions, oxalic acid and glycine only show interference in determination of Pb2+. The reproducibility study showed a %RSD of 2.43%, and the electrode could be efficiently used for prolonged and repetitive detection having reasonably low %RSD of 2.55%. The real water analysis showed almost 100% recovery of Pb2+ in two different real water samples.

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Comparing the effects of humic acid and oxalic acid on Pb(II) immobilization by a green synthesized nanocrystalline hydroxyapatite

Cited by 23 publications

References 86 publications

Isolation and screening of phosphorus solubilizing bacteria from saline alkali soil and their potential for Pb pollution remediation

Isolation and screening of phosphorus solubilizing bacteria from saline alkali soil and their potential for Pb pollution remediation

Recycling of Lead Pastes from Spent Lead–Acid Batteries: Thermodynamic Constraints for Desulphurization

Greener synthesis of novel nanocomposite material for efficient and selective trace detection of Pb<sup>2+</sup>: Insights of stability and real implications of fabricated electrode

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