Characteristics of Zinc Adsorption onto Biochars Derived from Different Feedstocks
Human activities such as the discharge of urban sewage, garbage, and industrial waste have seriously affected the quality of groundwater sources for human consumption. The potential for using biochar as a reactive medium in a permeable reactive barrier (PRB) was explored for Zn-contaminated groundwa...
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| Format: | Article |
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MDPI AG
2023-10-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/21/3789 |
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| author | Jiajia Liu Fei Wang Wangqi Xu |
| author_facet | Jiajia Liu Fei Wang Wangqi Xu |
| author_sort | Jiajia Liu |
| collection | DOAJ |
| description | Human activities such as the discharge of urban sewage, garbage, and industrial waste have seriously affected the quality of groundwater sources for human consumption. The potential for using biochar as a reactive medium in a permeable reactive barrier (PRB) was explored for Zn-contaminated groundwater treatment in this study. Four different types of biochar produced from wood, coconut shell, rice straw, and fruit shell were used. The production temperature of these biochars were 600 °C, 550 °C, 500 °C, and 500 °C, respectively. The samples were coded with the initials of the biochar source and the production temperature as WD600, CS550, RS500, and FS500. The results of various batch adsorption studies show that equilibrium solution pH has a great effect on the maximum adsorption capacity in the pH range of 2–7. The adsorption of Zn on biochars follows the Freundlich model and fits well with the pseudo-second-order model. The fixed-bed column test data were well fitted to the Dose–Response model. The adsorption capacities of WD600, CS550, RS500, and FS500 were 24.91, 15.87, 9.25, and 46.71 mg/g, respectively. The removal rate of FS500 can reach a maximum of 98.87%. FS500 is considered to be a potential reaction medium for treating Zn-contaminated groundwater in a PRB system. This work provides a new option for converting biomass waste into an adsorbent for zinc in wastewater. The results of this study are expected to provide a solid theoretical basis for the further application of biochar in groundwater pollution remediation. |
| first_indexed | 2024-03-11T11:18:57Z |
| format | Article |
| id | doaj.art-e892985e191840478a1ed08342a37b32 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T11:18:57Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-e892985e191840478a1ed08342a37b322023-11-10T15:15:20ZengMDPI AGWater2073-44412023-10-011521378910.3390/w15213789Characteristics of Zinc Adsorption onto Biochars Derived from Different FeedstocksJiajia Liu0Fei Wang1Wangqi Xu2Environmental Engineering College, Nanjing Polytechnic Institute, Nanjing 210044, ChinaInstitute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 210096, ChinaInstitute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 210096, ChinaHuman activities such as the discharge of urban sewage, garbage, and industrial waste have seriously affected the quality of groundwater sources for human consumption. The potential for using biochar as a reactive medium in a permeable reactive barrier (PRB) was explored for Zn-contaminated groundwater treatment in this study. Four different types of biochar produced from wood, coconut shell, rice straw, and fruit shell were used. The production temperature of these biochars were 600 °C, 550 °C, 500 °C, and 500 °C, respectively. The samples were coded with the initials of the biochar source and the production temperature as WD600, CS550, RS500, and FS500. The results of various batch adsorption studies show that equilibrium solution pH has a great effect on the maximum adsorption capacity in the pH range of 2–7. The adsorption of Zn on biochars follows the Freundlich model and fits well with the pseudo-second-order model. The fixed-bed column test data were well fitted to the Dose–Response model. The adsorption capacities of WD600, CS550, RS500, and FS500 were 24.91, 15.87, 9.25, and 46.71 mg/g, respectively. The removal rate of FS500 can reach a maximum of 98.87%. FS500 is considered to be a potential reaction medium for treating Zn-contaminated groundwater in a PRB system. This work provides a new option for converting biomass waste into an adsorbent for zinc in wastewater. The results of this study are expected to provide a solid theoretical basis for the further application of biochar in groundwater pollution remediation.https://www.mdpi.com/2073-4441/15/21/3789permeable reactive barrieradsorptionbiocharzinckinetic |
| spellingShingle | Jiajia Liu Fei Wang Wangqi Xu Characteristics of Zinc Adsorption onto Biochars Derived from Different Feedstocks Water permeable reactive barrier adsorption biochar zinc kinetic |
| title | Characteristics of Zinc Adsorption onto Biochars Derived from Different Feedstocks |
| title_full | Characteristics of Zinc Adsorption onto Biochars Derived from Different Feedstocks |
| title_fullStr | Characteristics of Zinc Adsorption onto Biochars Derived from Different Feedstocks |
| title_full_unstemmed | Characteristics of Zinc Adsorption onto Biochars Derived from Different Feedstocks |
| title_short | Characteristics of Zinc Adsorption onto Biochars Derived from Different Feedstocks |
| title_sort | characteristics of zinc adsorption onto biochars derived from different feedstocks |
| topic | permeable reactive barrier adsorption biochar zinc kinetic |
| url | https://www.mdpi.com/2073-4441/15/21/3789 |
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