Comparative study on Pb2+ removal from aqueous solutions using biochars derived from cow manure and its vermicompost

Zhang, Weiwen; Du, Wenhui; Wang, Feng; Xu, Huiting; Zhao, Tonghe; Zhang, Hangjun; Ding, Ying; Zhu, Wenjie

doi:10.1016/j.scitotenv.2020.137108

Cited by 56 publications

(14 citation statements)

References 49 publications

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“…and Temkin (q e = RT b × ln(A T × C e )) models are often used to analyze experimental data and describe the adsorption equilibrium of Pb on biochar. According to the existing data of Pb adsorption by biochar in Figure 4, approximately 71.29% of the papers are in line with the Langmuir model [54,57,79,[84][85][86][87][88][89][90], implying that the Pb adsorption on the surface of biochar is more like the single layer adsorption. For example, Wongrod et al found that the adsorption isotherm of Pb by digestate biochar could be well described by the Langmuir isotherm model [91].…”

Section: Adsorption Isothermmentioning

confidence: 70%

Adsorption of Lead from Aqueous Solution by Biochar: A Review

Wang

et al. 2022

Clean Technol.

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Industrialization has resulted in the discharge of a certain amount of lead (Pb) from industrial sources causing damage risk to water quality and human health. Adsorption is an effective technique to remove Pb, and biochar has been widely studied owing to its advantages of low cost and high adsorption capacity. This review summarizes the influence of raw materials and modification methods on the adsorption capability of biochar. The adsorption isotherms and kinetics of biochar were summarized, and the main Pb removal mechanisms were studied systematically. In addition, the challenges and future perspectives were discussed comprehensively. It is expected that the review could provide insightful fundamentals for the experimental research and practical applications of biochar.

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Section: Adsorption Isothermmentioning

confidence: 70%

Adsorption of Lead from Aqueous Solution by Biochar: A Review

Wang

et al. 2022

Clean Technol.

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“…Kwak et al (2019) [ 30 ] determined that there are relationships among feedstock type, pyrolysis condition, biochar property, and Pb(II) adsorption capacity and found that an increase in pyrolysis temperature increased the Pb(II) adsorption capacity due to the higher pH, higher ash contents, and larger surface areas of biochars by increasing the ion exchange capacity, precipitation, and inner-sphere complexation [ 30 ]. Furthermore, Zhang et al (2020) [ 31 ] reported that the surface functional groups such as –OH, C=O, –COO–, and C–O led to more effective Pb(II) removal from aqueous solutions by cow manure-derived biochar [ 31 ]. Therefore, there is a slight increase in Pb(II) with increasing temperature, which is attributed to the integrated effect of higher specific surface area and pH and fewer functional groups at higher temperatures.…”

Section: Resultsmentioning

confidence: 99%

Co-Pyrolysis of Cotton Stalks and Low-Density Polyethylene to Synthesize Biochar and Its Application in Pb(II) Removal

Yuan

Zhang

Lv³

et al. 2022

Molecules

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It is inevitable that reclaimed cotton stalks will contain a certain amount of plastic film due to the wide application of plastic mulching during the process of cotton cultivation, and this makes it inappropriate to return it to the field or for it to be processed into silage. In this study, biochars were prepared by the co-pyrolysis of cotton stalk with low-density polyethylene (LDPE) in the proportions of 1:0, 3:1, 2:1, and 1:1 (w/w) at 400 °C, 450 °C, and 500 °C and maintaining them for 1 h. The effects of the co-pyrolysis of cotton stalk with LDPE on the properties of biochars (e.g., pH, yield, elemental analysis, specific surface area, etc.) and the Pb(II) removal capacity were analyzed. Co-pyrolysis cotton stalks with LDPE could delay the decomposition of LDPE but could promote the decomposition of cotton stalk. At 400 °C and 450 °C, the addition of LDPE decreased the H/C ratio, while no significant difference was found between the pristine biochar and the blended biochar pyrolyzed at 500 °C. An FTIR analysis indicated that the surface functional groups of biochar were not affected by the addition of LDPE, except for CH3 and CH2. The results of the SEM showed that LDPE could cover the surface of biochar when pyrolyzed at 400 °C, while many macropores were found in the blended biochar that was pyrolyzed at 450 °C and 500 °C, thus increasing its surface area. The blended biochar that was pyrolyzed at 500 °C was more effective in the removal of Pb(II) than the cotton-stalk-derived biochar, which was dominated by monolayer adsorption with a maximum adsorption capacity of approximately 200 mg·g−1. These results suggested that the co-pyrolysis of cotton stalks and LDPE may be used to produce biochar, which is a cost-effective adsorbent for heavy metal removal from aqueous solutions.

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“…Animal manure and crop residuals are found to be excellent organic adsorbents of heavy metals Wnetrzak et al, 2014). Zhang et al (2020) investigated the potential of using vermicompost derived biochar as an adsorbent to remove Pb +2 from solutions. Biochar of cow manure based vermicompost were produced by the process of pyrolysis where raw materials are exposed to 350 and 700 °C.…”

Section: Vermicomposting To Reduce Toxicity Of Raw Materialsmentioning

confidence: 99%

Sustainable organic waste management and nutrients replenishment in the soil by vermicompost: A review

Fernando

Arunakumara

2021

AGRIEAST: J. Agri. Sci.

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With the rapid growth of global population, food production and waste management are considered to be two major challenges faced by people in 21 st century. Though application of chemical fertilizers enhances crop growth, vigor and yield thereby meeting the food security, it depletes the quality of environment and ecosystems. Recycling of organic wastes is considered to be a feasible solution which could mitigate the issues of waste management while uplifting the status of soil health and nutrients. The objective of this article is to reviews the currently available literature on vermicomposting as a tool for recycling of different organic waste materials and subsequent use as organic amendment to improve soil properties and as organic fertilizer to enhance growth and yield of various crops. Furthermore, models were proposed to improve education on vermicomposting as a solution for organic waste management among farmers, students, government offices and general public and develop as a community based microenterprise. Vermicomposting is defined as a process where earthworms convert organic wastes into humus like materials. It has been investigated worldwide taking its practical significance into account. Vermicompost is found to be a good source of plant macro nutrients, micro nutrients and growth regulators, including humic acid, indole acetic acid and kinetin. Microbes live in the alimentary canal of the earthworms improve the quality of vermicast hence vermicompost. Furthermore, vermicompost could absorb heavy metals in soil and water while eliminating of human pathogens such as Salmonella spp, fecal coliforms, Shigella spp, Enterobacter aerogenes, Enterobacter cloacae and eggs of helminthes. Reviewed literature indicated the potential of vermicomposting to be used as an efficient technique for bioconversion of organic wastes into a valuable organic fertilizer. Furthermore, the present review suggests vermicompost production as a micro-enterprise which could be used to uplift the livelihood of the resource poor farmers through economic empowerment while assuring sustainable crop production.

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Comparative study on Pb2+ removal from aqueous solutions using biochars derived from cow manure and its vermicompost

Cited by 56 publications

References 49 publications

Adsorption of Lead from Aqueous Solution by Biochar: A Review

Adsorption of Lead from Aqueous Solution by Biochar: A Review

Co-Pyrolysis of Cotton Stalks and Low-Density Polyethylene to Synthesize Biochar and Its Application in Pb(II) Removal

Sustainable organic waste management and nutrients replenishment in the soil by vermicompost: A review

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