Adsorption characteristics and mechanisms of Pb2+ and Cd2+ by a new agricultural waste–Caragana korshinskii biomass derived biochar

Wang, Tongtong; Zheng, Jiyong; Liu, Hongtao; Peng, Qin; Zhou, Huoming; Zhang, Xingchang

doi:10.1007/s11356-020-11571-9

Cited by 46 publications

(15 citation statements)

References 63 publications

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“…The chemical structures and toxicity mechanisms of Pb, Cd, and As are entirely different (Gao et al, 2010;Alho et al, 2019;Wang et al, 2020); therefore, neither the surrogate approach nor the TEF approach was suitable for the cumulative risk assessment of these chemicals. To overcome these barriers, the present study developed a three-step integrated tiered strategy called "decision tree" for cumulative risk assessment of heavy metals in food homologous TCM, which was the first of its kind (Figure 4).…”

Section: Discussionmentioning

confidence: 99%

Novel Integrated Tiered Cumulative Risk Assessment of Heavy Metals in Food Homologous Traditional Chinese Medicine Based on a Real-Life-Exposure Scenario

et al. 2022

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In order to serve population health better, the first integrated tiered decision tree for cumulative risk assessment of co-exposure of Pb-, Cd-, and As-associated health risks in food homologous traditional Chinese medicine (TCM) was designed, after measuring their concentrations by inductively coupled plasma-mass spectroscopy (ICP-MS). Basically, our three-step decision tree involving hazard quotient (HQ), hazard index (HI), and target-organ toxicity dose (TTD) modification of the HI method was developed to evaluate the potential risks of 949 batches of 15 types of food homologous TCM. To acquire a real-life exposure scenario, the cumulative risk assessment model was established by optimizing key parameters, such as ingestion rates, frequency, and duration of exposure to food homologous TCM based on questionnaire data. As a result, the mean concentrations of Pb, Cd, and As in 949 batches of food homologous TCM were 0.896, 0.133, and 0.192 mg/kg, respectively. The HQ values of As for Angelica sinensis (Oliv.) Diels and Houttuynia cordata Thunb. were 1.04 and 1.01, respectively, for females. Other HQs of Pb, Cd, or As in food homologous TCM were lower than 1 for both males and females. However, after rapid screening of the co-exposure health risks of heavy metals by the HI method, cumulative risk assessment results acquired by TTD modification of the HI method implied that the potential health risks associated with the co-exposure of Pb, Cd, and As in Lonicera japonica Thunb. and Houttuynia cordata Thunb. ingested as both TCM and food were of concern in the clinic. Additionally, the cumulative risks of Pb, Cd, and As in Mentha canadensis L., Chrysanthemum indicum L., and Zaocys dhumnades (Cantor) only used as food exceeded the human tolerance dose. Collectively, our innovation on the tiered strategy of decision tree based on a real-life exposure scenario provides a novel approach engaging in the cumulative risk assessment of heavy metals in food homologous TCM. All in all, such effort attempts to scientifically guide the rational use of TCM in the treatment of the complex diseases and the improvement of population health.

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Section: Discussionmentioning

confidence: 99%

Novel Integrated Tiered Cumulative Risk Assessment of Heavy Metals in Food Homologous Traditional Chinese Medicine Based on a Real-Life-Exposure Scenario

et al. 2022

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“…The method is most commonly used owing to its uidity with biomass feedstock sources and exible operating conditions. Various biomass raw materials like crab shell, 55 rice straw, eucalyptus leaves and vetiver grass, 56 Caragana korshinskii, 57 corn stalk and polyethylene, 58 etc., have favourably been converted into porous carbons by pyrolysis. The conversion involves reactions like dehydration, condensation, crosslinking, depolymerization, fragmentation and isomerization.…”

Section: Pyrolysis Carbonizationmentioning

confidence: 99%

Recent advancement of biomass-derived porous carbon based materials for energy and environmental remediation applications

et al. 2022

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“…For example, a recent national soil quality survey bulletin in China showed that soil heavy metal pollution is widespread throughout the country, and 1.5% of which are contaminated with Pb (CMEP, 2014). Lead contaminated soil has become a very serious world environmental concern and has received widespread attention from scholars (Wang et al, 2021b). In fact, the U.S. EPA listed Pb as one of the six most dangerous heavy metal contaminants as early as 1992 (Cameron 1992).…”

Section: Introductionmentioning

confidence: 99%

“…This is because the nonbiodegradability, toxicity, persistence and bioaccumulation of lead in the ecosystem are the main threats to human and ecological health (Zhang et al, 2017). After surface soil accumulation, Pb not only affects the yield and quality of crops, but also may be converted into more toxic compounds by some microorganisms, and enter the human body through the food chain, affecting human health (Wang et al, 2021b). Therefore, remediation of Pb-contaminated soils is necessary to reduce the migration and transformation of Pb in Pbcontaminated soils (Xi et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Investigation on stabilization/solidification characteristics of lead-contaminated soil using innovative composite model of cement and soda residue

Zuo

Wang

et al. 2022

Environ Earth Sci

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The cement solidi cation/stabilization method of heavy metal contaminated soils has been promoted in engineering practice and applied on a large scale for site remediation, but it still reveals some scienti c problems in the current complex and variable global extreme climate. To solve these problems and explore cement-based soil remediation technology, this study used the waste soda residue produced in large quantities in the "ammonia-soda process" as a composite additive, and established an innovative composite model of cement and soda residue by adding different ratios, which was applied to the remediation experiments of lead-contaminated soil. The innovative composite model solidi cation/stabilization of cement and soda residue for uncon ned compressive strength and toxic leaching properties under different soil environmental conditions were investigated. Moreover, curing and leaching mechanisms are discussed, and future industrial practice was evaluated. The results showed that the addition of soda residue improved the early (20 days) uncon ned compressive strength (UCS) of the composite curing agent for lead-contaminated soil by an average of 23.1% Mpa.When the percentage of soda residue composite was 40%, the UCS strength was 0.96 Mpa, which reached the maximum. The concentration of Pb 2+ in the leachate of the cement-soda residue composite curing agent was greatly reduced (average 3.28 times) compared with that of a single cement in the same situation, with an average leached Pb 2+ concentration of 1.87 mg•L -1 . This indicates that the addition of alkali residue improved the curing effect. The curing mechanism was divided into four steps, mainly a complex physicochemical reaction between the cement-soda residue composite and soil particles. The leaching mechanism of cement-soda residue to aqueous solution is mainly the consumption of acid ions by alkaline substances. This study will provide scienti c data to support potential lead-containing soil in site remediation technologies and future large-scale engineering applications. Highlights 1. The cement and soda residue were compounded in a direct homogeneous mixture.2. The UCS, TCL, curing and leaching mechanisms were researched and discussed.3. The doping ratios of S b /S d =20% and S s /S b =40% have the best curing effect. 4. cement-soda residue composite reduces the leaching of Pb 2+ by 3.28 times, i.e. 1.87 mg•L -1 . 5. The curing mechanism was divided into four steps, mainly a complex physicochemical reaction.

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Adsorption characteristics and mechanisms of Pb2+ and Cd2+ by a new agricultural waste–Caragana korshinskii biomass derived biochar

Cited by 46 publications

References 63 publications

Novel Integrated Tiered Cumulative Risk Assessment of Heavy Metals in Food Homologous Traditional Chinese Medicine Based on a Real-Life-Exposure Scenario

Novel Integrated Tiered Cumulative Risk Assessment of Heavy Metals in Food Homologous Traditional Chinese Medicine Based on a Real-Life-Exposure Scenario

Recent advancement of biomass-derived porous carbon based materials for energy and environmental remediation applications

Investigation on stabilization/solidification characteristics of lead-contaminated soil using innovative composite model of cement and soda residue

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