Polyaspartic acid assisted-phytoremediation of cadmium-contaminated farmland: Phytoextraction efficiency, soil quality, and rhizosphere microbial community

Liu, Yanwei; Zhou, Juanjuan; Sun, Daolin; Chen, Haifeng; Qin, Junhao; Chen, Guikui; Qiu, Rongliang

doi:10.1016/j.scitotenv.2022.160736

Cited by 25 publications

(5 citation statements)

References 85 publications

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“…In this study, treatment with PASP-7 and PASP-10 significantly increased the aboveground and underground biomasses of ryegrass, while treatment with CA and FA had unobvious effects. Liu et al 46 discovered that PASP, as an amino acid polymer composed of C, H, O and N elements, was well biodegradable and non-toxic to organisms, which was not only applicable as a nutrient enhancer and a metal ion chelating agent, but could also enrich N, P, K and trace elements to supply plants, enabling more effective nutrients utilization by plants to increase their biomass.…”

Section: Discussionmentioning

confidence: 99%

Extraction of heavy metals from copper tailings by ryegrass (Lolium perenne L.) with the assistance of degradable chelating agents

Wang,

Xue,

Zhang

et al. 2024

Sci Rep

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Heavy metal contamination is an urgent ecological governance problem in mining areas. In order to seek for a green and environmentally friendly reagent with better plant restoration effect to solve the problem of low efficiency in plant restoration in heavy metal pollution soil. In this study, we evaluated the effects of three biodegradable chelating agents, namely citric acid (CA), fulvic acid (FA) and polyaspartic acid (PASP), on the physicochemical properties of copper tailings, growth of ryegrass (Lolium perenne L.) and heavy metal accumulation therein. The results showed that the chelating agent application improved the physicochemical properties of copper tailings, increased the biomass of ryegrass and enriched more Cu and Cd in copper tailings. In the control group, the main existing forms of Cu and Cd were oxidizable state, followed by residual, weak acid soluble and reducible states. After the CA, FA or PASP application, Cu and Cd were converted from the residual and oxidizable states to the reducible and weak acid soluble states, whose bioavailability in copper tailings were thus enhanced. Besides, the chelating agent incorporation improved the Cu and Cd extraction efficiencies of ryegrass from copper tailings, as manifested by increased root and stem contents of Cu and Cd by 30.29–103.42%, 11.43–74.29%, 2.98–110.98% and 11.11–111.11%, respectively, in comparison with the control group. In the presence of multiple heavy metals, CA, FA or PASP showed selectivity regarding the ryegrass extraction of heavy metals from copper tailings. PCA analysis revealed that the CA-4 and PASP-7 treatment had great remediation potentials against Cu and Cd in copper tailings, respectively, as manifested by increases in Cu and Cd contents in ryegrass by 90.98% and 74.29% compared to the CK group.

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Section: Discussionmentioning

confidence: 99%

Extraction of heavy metals from copper tailings by ryegrass (Lolium perenne L.) with the assistance of degradable chelating agents

Wang,

Xue,

Zhang

et al. 2024

Sci Rep

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“…C0 is Initial concentration of chromium hexavalent in wastewater samples. Ct is the final concentration of chrom in the sample [7].…”

Section: Experimental Analysismentioning

confidence: 99%

“…It takes substantial effort to manage waste containing heavy metals effectively. The implementation of suitable and effective waste treatment technology is one of the crucial stages in decreasing the negative impact produced by heavy metals on the surrounding environment [7][8][9]. Heavy metals and toxic substances can be removed by several waste treatment procedures physiologically, physically and chemically, including adsorption, ion exchange, chemical precipitation, electrochemical processing and filtration membranes and phytoremediation [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Phytoremediation of Cr(VI) from Aqueos Solution by Pistia stratiotes L.: Efficiency and Kinetic Models

Haeril,

Sawali,

Afandy

2024

J. Tek. Kim. Ling

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Phytoremediation utilizes metal-trapping plants to recover water as the main source of contamination, Pistia Stratiotes L. is a hyperaccumulator plant that is considered capable of reducing hexavalent chromium levels in wastewater. This is evidenced by the results obtained on each of the variables investigated, namely the effect of contact time and the number of plants. Where, the effect of contact time on the most optimal reduction in hexavalent chromium concentration on day 10 is 22.55 mg/ L with an efficiency value of 54.89 %. While the effect of the number of plants on the reduction in the most optimal metal concentration was found in the first reactor with the number of plants 4, chromium concentration was 23.16 mg/ L with an efficiency value of 54.89%. This means that the longer the phytoremediation process will affect the decrease in chromium levels in waste samples but has no effect on the number of plants used if the plant mass is not calculated before treatment. The recommended kinetic models for phytoremediation systems using P. Stratiotes L plants are Richard's Pseudo First Order and Pseudo Second Order. However, when viewed from the prediction value and experimental data, Pseudo Second Order Kinetic Models are considered suitable to describe the phenomenon that occurs in this study, with an SSE value of 1.0042 and a reaction rate constant of 1.1662 day-1 to 1.5623 day-1.

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“…It serves as a precursor for drug synthesis and pharmaceutical intermediates, 1 is used in skincare and cosmetic products for moisturizing and anti-aging effects, 2 acts as a natural sweetener and flavor enhancer in the food and beverage industry, 3 and is used to synthesize polyaspartic acid, which is employed in fields such as oilfield wastewater treatment, boiler water treatment, and seawater desalination. 4,5 The broad range of uses for l -aspartic acid in flavor enhancement, pharmaceutical synthesis, and material science underscores its significance in numerous industries.…”

Section: Introductionmentioning

confidence: 99%

Developing a green and efficient biosynthesis system for l-aspartic acid by addressing enzyme imbalance and catalysis-extraction circulation processes

Wang,

Zhou

et al. 2023

Green Chem.

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Polyaspartic acid assisted-phytoremediation of cadmium-contaminated farmland: Phytoextraction efficiency, soil quality, and rhizosphere microbial community

Cited by 25 publications

References 85 publications

Extraction of heavy metals from copper tailings by ryegrass (Lolium perenne L.) with the assistance of degradable chelating agents

Extraction of heavy metals from copper tailings by ryegrass (Lolium perenne L.) with the assistance of degradable chelating agents

Phytoremediation of Cr(VI) from Aqueos Solution by Pistia stratiotes L.: Efficiency and Kinetic Models

Developing a green and efficient biosynthesis system for l-aspartic acid by addressing enzyme imbalance and catalysis-extraction circulation processes

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