Article
Engineering, Environmental
Chunlian Hu, Wei Zhang, Yuantao Chen, Na Ye, DaWa YangJi, Haizhe Jia, Yanting Shen, Minna Song
Summary: The carboxylated sludge biochar (CSB) modified by HNO3 showed improved adsorption capacity for the removal of cobalt, making it a promising adsorbent for wastewater treatment.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Kanfolo Franck Herve Yeo, Yingying Dong, Tongxuan Xue, Zhiwen Chen, Nan Zhang, Ye Yang, Liu Han, Meiling Liu, Ange Nsilani Kouediatouka, Hanse Pablick Patherny Lobo Mouguegue, Wendong Wang
Summary: Al-KBC was produced by pyrolysis of Al-modified kapok fibres, and its superior As(V) adsorption performance was observed due to better pore structures. The kinetics of As(V) adsorption followed the pseudo-second-order model and the adsorption mechanism corresponded to the Langmuir model. The adsorption reactions were spontaneous endothermic with a random approach at the adsorption interface, and the sorbent demonstrated satisfactory reusability.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Md Shahinoor Islam, Jin-Hyeob Kwak, Christopher Nzediegwu, Siyuan Wang, Kumuduni Palansuriya, Eilhann E. Kwon, M. Anne Naeth, Mohamed Gamal El-Din, Yong Sik Ok, Scott X. Chang
Summary: Biochar's effectiveness in removing contaminants, especially heavy metals, from water depends on biomass type and the purging gas used during production; the sorptive capacity of biochar is mainly influenced by biomass type and varies for different heavy metals based on the Langmuir adsorption model.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
R. Gayathri, K. P. Gopinath, P. Senthil Kumar
Summary: In this study, ultrasonic assisted jujube seeds (UAJS) treated with sulphuric acid were experimented as adsorbents for removing Zn(II) and Pb(II) contaminated water. Results show that UAJS has higher adsorption capacity and is effective in treating industrial wastewater containing metal ions.
Article
Multidisciplinary Sciences
Faith Cherono, Njenga Mburu, Beatrice Kakoi
Summary: Heavy metal pollution is a serious environmental challenge, but activated carbon from waste rubber tires has been shown to effectively remove copper, lead, and zinc from wastewater. The adsorption process is rapid, reaching equilibrium within 120 minutes, with adsorption effectiveness influenced by adsorbent dosage and contact time.
Article
Environmental Sciences
Saptarshi Ghosh, Manoranjan Sahu
Summary: The rise of the polymer industry has led to the leaching of phthalate esters into the environment, posing a potential threat to living organisms and ecosystems. This study focuses on developing cost-effective adsorbents, specifically biochar derived from peanut hulls, for removing these harmful compounds, using the model pollutant DMP. The different properties of biochars produced at various pyrolysis temperatures were examined to understand their adsorbent properties and performance. The results demonstrated that biochars exhibited chemisorption and multi-layered adsorption, with the highest efficiency observed for BC650 at 98.8%, followed by CAC at 98.6%. The study also identified the dominant mechanisms of adsorption for DMP onto porous biochar as H-bonding, p-p EDA interactions, and diffusion within the pore spaces. Overall, this research offers strategies for synthesizing biochar effectively for the removal of DMP from aqueous solutions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Multidisciplinary Sciences
Abid Hussain, Ubaida Yousaf, Usama Rahman Ch, Jahangir Ahmad, Mohsin Nawaz, Hafiz Nazar Faried, Tanveer Ul-Haq
Summary: Efficient adsorbents were successfully fabricated by modifying orchard waste biochar (BC), leading to improved removal of copper [Cu(II)] from aqueous solutions. BC/Fe-0 exhibited a higher initial sorption rate and greater selectivity for Cu(II) removal compared to BC/P and other tested adsorbents, making it a promising green and cost-effective alternative for Cu(II) removal.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Analytical
Samah Daffalla
Summary: In this study, palm leaf biochar was treated with phosphoric acid to enhance its sorption efficiency of Cr(VI) from aqueous solutions. Characterization experiments showed that the phosphoric acid-treated biochar (TBC-P) exhibited more surface oxygenated functional groups, surface area, pore size, and internal structure compared to palm leaves and untreated biochar. Batch adsorption experiments demonstrated that TBC-P had a strong sorption ability to Cr(VI), with a removal efficiency of 99% at pH 2.0, significantly higher than untreated biochar. The TBC-P could be successfully regenerated using a 0.1 M HCl solution.
Article
Chemistry, Analytical
Bingbing Qiu, Xuedong Tao, Hao Wang, Wenke Li, Xiang Ding, Huaqiang Chu
Summary: This review summarizes the research progress on biochar as an adsorbent for heavy metal pollution water treatment, including the effects of its physicochemical properties on heavy metal adsorption, the effectiveness of modified biochar, and various factors influencing heavy metal adsorption. Additionally, different mechanisms of heavy metals adsorption based on different physicochemical properties are discussed.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Environmental Sciences
Francisco Jose de Paula Filho, Yago Neco Teixeira, Vinicius Pereira Bacurau, Anderson Zhong Fan, Jorge Marcell Coelho Menezes, Thiago Mielle Brito Ferreira Oliveira, Raimundo Nonato Pereira Teixeira, Henrique Douglas Melo Coutinho, Ronaldo Ferreira do Nascimento
Summary: High phosphate concentrations in natural waters can lead to eutrophication problems and harm the fauna and flora of ecosystems. This study investigated the adsorption capacity of fruit peel ash from Caryocar coriaceum Wittm in removing phosphate from water solutions. The ash showed high adsorption capacity and followed the Elovich and Langmuir models for kinetics and equilibrium, respectively. The highest removal efficiency was 97.08%. These results suggest that fruit peel ash has potential as a natural bioadsorbent for phosphate removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Civil
Shamim A. Begum, A. H. M. Golam Hyder, Qwanikwia Hicklen, Taylor Crocker, Ben Oni
Summary: The study investigated the removal of ammonium from water using biochar derived from various wood chips. Results showed that higher biochar dosage led to increased removal of ammonium, with the optimum pH for removal considered to be between 6 to 8. The adsorption isotherm followed both the Langmuir and Freundlich models, indicating the potential for biochar to effectively remove ammonium from aqueous solution.
AQUA-WATER INFRASTRUCTURE ECOSYSTEMS AND SOCIETY
(2021)
Article
Environmental Sciences
Anyu Li, Hanquan Xie, Ying Qiu, Lihu Liu, Tao Lu, Weihua Wang, Guohong Qiu
Summary: This study used metal-oxide modified biochar to simultaneously remediate and remove heavy metals in soil and wastewater. The results showed that the modified biochar had strong adsorption capacity for various heavy metals and could effectively reduce their concentrations in soil and wastewater. The addition of modified biochar also facilitated the transformation and immobilization of heavy metals. This study provides efficient functional materials for the remediation of heavy metal pollution.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Waqas Ahmed, Sajid Mehmood, Avelino Nunez-Delgado, Sehrish Ali, Muhammad Qaswar, Awais Shakoor, Ali Akbar Maitlo, Di-Yun Chen
Summary: A novel phosphorus modified biochar (PLBC) was developed from Taraxacum mongolicum Hand-Mazz biomass for efficient removal of As(III) from contaminated water. The presence of phosphorus on the biochar surface improved its efficiency for As(III) removal, with the best adsorption capacity achieved at pH 5.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Review
Green & Sustainable Science & Technology
Maria Alejandra Decima, Simone Marzeddu, Margherita Barchiesi, Camilla Di Marcantonio, Agostina Chiavola, Maria Rosaria Boni
Summary: Carbamazepine, a widely used pharmaceutical and a Concern of Emerging Contaminants, poses potential risks to the environment and human health. In urban water cycles, its presence and removal methods, with a focus on the adsorption onto activated carbon and biochar, are comprehensively discussed. Various factors influencing CBZ adsorption, such as physicochemical characteristics of adsorbents and operational conditions, are analyzed to improve water treatment efficiency.
Article
Engineering, Chemical
Ayat Allah Al-Massaedh, Fawwaz Khalili
Summary: A new macroporous polyacrylamide-based monolith with negatively charged sulfonic acid groups was synthesized as an adsorbent for removing heavy metal ions from aqueous solutions. The adsorption data fit well with the Langmuir isotherm model.
DESALINATION AND WATER TREATMENT
(2021)