Sustainable Chemistry for the Environment最新文献

{"title":"Application of natural earth-based materials as adsorbents for the treatment of chromium (VI)-contaminated tannery wastewater: Box-Behnken and fixed-bed column optimization","authors":"Yohanna Haile Fseha ,&nbsp;Jamiu O. Eniola ,&nbsp;Banu Sizirici ,&nbsp;Sasi Stephen ,&nbsp;Ibrahim Yildiz ,&nbsp;Abbas Khaleel ,&nbsp;Abdulmuizz Adamson","doi":"10.1016/j.scenv.2024.100127","DOIUrl":"https://doi.org/10.1016/j.scenv.2024.100127","url":null,"abstract":"<div><p>This study focuses on the application of earth materials (gravel, clay, zeolite, lime rock, sea shell (<em>Diplodonta</em>)) as adsorbents for the removal of chromium (VI) from tannery wastewater. The removal efficiencies and adsorption capacities of chromium (VI) followed this order: pristine lime rock (63.59 %, q_e: 65.5 mg/g)&gt; pristine gravel (48.88 % and 50.4 mg/g)&gt; pristine sea shell (39.03 %, q_e: 40.2 mg/g)&gt; pristin_e zeolite (38.5 %, q_e: 39.7 mg/g) &gt; pristine clay (33.55 %, q_e: 34.5 mg/g). Lime rock and gravel gave th_e highest chromium (VI) adsorption capacities and hence, were used in subsequent experiments. Employing Box-Behnken design through response surface methodology, gravel exhibited the highest adsorption capacity (40.7 mg/g) at pH 4, and lime rock (56.1 mg/g) at pH 2, with initial chromium (VI) concentration of 150 mg/L and 11-hour contact time. Scanning electron microscopy and Brunauer–Emmett–Teller analysis showed a lack of pores on both adsorbents suggesting electrostatic attraction as the primary removal mechanism. Best-fitted models were Dubinin-Radushkevich and Temkin isotherms for lime rock and gravel, respectively, while pseudo-first-order kinetics suited both. Thermodynamics calculations showed adsorption is exothermic for lime rock and endothermic for gravel. Application of lime rock in fixed-bed column study showed the highest removal percentage and adsorption capacity (16.64 %, q_e: 2.3 mg/g). Applying optimum conditions from column study to synthetic tannery wastewater achieved 63.61 % removal and adsorption capacity (q_e: 12.7 mg/g) at 150 mg/L initial chromium (VI) concentration. Regeneration of the adsorbents after 3 cycles maintained strong adsorption capacity. The cost-effective, easily-prepared adsorbent underscores its potential for large-scale wastewater treatment.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"7 ","pages":"Article 100127"},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000701/pdfft?md5=25623b04a68fb7761e1f39827a1b9ea3&pid=1-s2.0-S2949839224000701-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141324276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Valorization of agricultural byproducts – The use of mustard seed meal for pest control","authors":"John Randall ,&nbsp;Atoosa Nikoukar ,&nbsp;Arash Rashed ,&nbsp;Inna Popova","doi":"10.1016/j.scenv.2024.100122","DOIUrl":"https://doi.org/10.1016/j.scenv.2024.100122","url":null,"abstract":"<div><p>Mustard seed (<em>Brassica juncea</em>) meals from biodiesel production can be utilized as a feedstock for sourcing pesticidal compounds that can control ubiquitous soil pests such as wireworms. In the present study, we evaluated the pesticidal activity of <em>B. juncea</em> seed meal on wireworms (<em>Limonius infuscatus</em>) to promote the valorization of <em>B. juncea</em> seed meal with the end goal of increasing the overall sustainability of crop production. In the laboratory soil column study, <em>B. juncea</em> seed meal were applied to typical agricultural soil infested with wireworms. After application, the release of the primary biopesticidal compound was monitored and correlated with the motility, mortality, and metabolomic changes of wireworms. The pesticidal effect of <em>B. juncea</em> seed meal on wireworms was evident by the mass change and metabolomic response consistent with the stress response. Mortality of up to 100 % of wireworms was observed when soils was treated with <em>B. juncea</em> seed meal and tarped. Based on the statistical analysis, the release of the primary biopesticidal compound from <em>B. juncea</em> seed meal correlated well with soil electrical conductivity making it a potential proxy method for field monitoring.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"7 ","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000658/pdfft?md5=553d324199e8f79ff2d85d2e95ed4423&pid=1-s2.0-S2949839224000658-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141291294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co-pyrolytic investigation of waste bakelite with different thermoplastics using microwave and conventional batch pyrolysis reactor","authors":"Pabitra Mohan Mahapatra ,&nbsp;Supriya Kisan ,&nbsp;Soumya Ranjan Dash ,&nbsp;Sachin Kumar ,&nbsp;Zhitong Yao ,&nbsp;Achyut Kumar Panda","doi":"10.1016/j.scenv.2024.100119","DOIUrl":"10.1016/j.scenv.2024.100119","url":null,"abstract":"<div><p>Bakelite, a thermosetting plastic, is harder to recycle as compared to than thermoplastic polymers through thermal method due to its inherent property to harden on application of heat. This study co-pyrolyzes waste bakelite with polypropylene (PP), high-density polyethylene (HDPE), polystyrene (PS), and polymethyl methacrylate (PMMA) in a conventional semi-batch pyrolysis reactor and microwave pyrolysis reactor to determine how the reactor type and thermoplastic blending affect product distribution, yield, and composition of condensable fraction. The blending of thermoplastics and pyrolysis reactor types greatly affects product distribution. Bakelite, on pyrolysis, produces 39.12 wt% condensable product, which increased to 45.42 wt%, 58.76 wt%, 61.53 wt%, and 66.76 wt% in conventional pyrolysis and 49.87 wt%, 61.26 wt%, 66.51 wt%, and 72.88 wt% in microwave pyrolysis by blending HDPE, PP, PMMA, and PS respectively. The composition analysis through Gas chromatography-mass spectrometry and Fourier-transformed infrared spectroscopy confirms the formation of alkanes, cycloalkanes, alkenes, cycloalkenes, aromatics, and oxygenated compounds, from both pyrolysis processes. However, their percentage differ significantly in both processes. Microwave-assisted pyrolysis with activated carbon yields superior oil in both quantity and composition compared to conventional pyrolysis, effectively transforming waste plastics into valuable products.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"7 ","pages":"Article 100119"},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000622/pdfft?md5=c6803f34b16fc9f66ddc3b7520d2a15d&pid=1-s2.0-S2949839224000622-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141276312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A short review on natural precursors-plant-based fluorescent carbon dots for the targeted detection of metal ions","authors":"Jincy Jose ,&nbsp;Mohanraj Rangaswamy ,&nbsp;G.K. Shamnamol ,&nbsp;K.P. Greeshma","doi":"10.1016/j.scenv.2024.100114","DOIUrl":"10.1016/j.scenv.2024.100114","url":null,"abstract":"<div><p>Carbon dots (CDs) have been utilized as a fluorescence probe to detect heavy metal ions. They have good optical qualities and are easily produced from inexpensive materials. They offer excellent photoluminescence characteristics. The optical characteristics of the produced CDs can also be impacted by the synthesis procedure. The special optical emission allows the detection of heavy metals, biological heavy metals and hypochlorite anions. When used as fluorescent probes, CDs provide for a wide concentration range and a low detection limit. They can be used to assemble actual examples of electronic devices that have intriguing qualities. Since, CDs have distinct excitation-based emissions and photoluminescence, quenching and reversing the quenching process can be utilized as an analytical technique to detect specific analytes. CDs have been extensively utilized as metal ion sensors for the detection of Fe³⁺, Fe²⁺, Cu²⁺, Hg²⁺, Ag⁺, Au³⁺, Cd²⁺, Pb²⁺, Cr⁶⁺, Zn²⁺, As³⁺, V⁵⁺, Mo⁶⁺ and Al³⁺ as this review explains. The comparison based on quantum yield, sensitivity, selectivity, particle size, detection limit and sensing mechanisms are also described.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"7 ","pages":"Article 100114"},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000579/pdfft?md5=043d13507675e196e6fa926d670d904b&pid=1-s2.0-S2949839224000579-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141281612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing and hindering biodegradation: A comparative study on polyamide 6 reinforced with bio-fillers (peanut shell, olive pomace, and plaster)","authors":"Oumayma Oulidi ,&nbsp;Ibtissam Elaaraj ,&nbsp;Maria Jabri ,&nbsp;Asmae Nakkabi ,&nbsp;Aziz Bouymajane ,&nbsp;Fouzia Rhazi Filali ,&nbsp;Mohammed Fahim ,&nbsp;Noureddine El Moualij","doi":"10.1016/j.scenv.2024.100116","DOIUrl":"10.1016/j.scenv.2024.100116","url":null,"abstract":"<div><p>In recent years, bio-reinforced composite materials have occupied an important class among the materials of mass use in our daily lives thanks to their potential advantages such as lightness, low cost, ease of implementation, and in particular biodegradation. The latter has been the objective of several studies focusing particularly on poorly biodegradable polymers, among these polymers we find polyamide 6 (PA6). It is a semi-crystalline polymer, distinguished by its good mechanical properties, excellent chemical and thermal stability, and low price compared to other polyamides. In this research, we investigated the impact of reinforcing PA6 with peanut shell powder (PSP), olive pomace powder (OPP), and plaster (PL) on its biodegradation process. Our objective was to determine whether the incorporation of these reinforcements accelerates, delays, or has no effect on PA6 biodegradation. To achieve this, we conducted degradation experiments using the bacterium <em>Alcaligenes faecalis</em> (AF), isolated from the public landfill of Meknes, Morocco. Our findings revealed intriguing insights into the biodegradation behavior of the PA6 composites. Specifically, the incorporation of PSP significantly enhanced PA6 biodegradation, resulting in a notable 38 % weight loss. Conversely, the inclusion of OPP led to a delay in biodegradation, with only a 19 % weight loss observed. Interestingly, the addition of plaster exhibited a biodegradation pattern similar to that of raw PA6. Furthermore, we utilized FTIR and SEM coupled with EDS elemental analysis to confirm the biodegradation of the composites. These techniques provided valuable insights into the structural, morphological, and elemental changes undergone by the composites during the biodegradation process. Overall, our study contributes novel insights into the biodegradation dynamics of PA6 composites reinforced with natural materials. By elucidating the effects of reinforcement on biodegradation, our research paves the way for the development of sustainable and eco-friendly composite materials.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"7 ","pages":"Article 100116"},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000592/pdfft?md5=b35f78cf616098f1bb34c9668c561c50&pid=1-s2.0-S2949839224000592-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141275700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ni-Doped cerium oxide on rGO: A hydrothermal approach for high-performance supercapacitors","authors":"Nishath Afza ,&nbsp;M.S. Shivakumar ,&nbsp;G. Krishnamurthy ,&nbsp;M. Mylarappa ,&nbsp;C.R. Ravikumar","doi":"10.1016/j.scenv.2024.100117","DOIUrl":"https://doi.org/10.1016/j.scenv.2024.100117","url":null,"abstract":"<div><p>This work describes the hydrothermal method for synthesizing a novel nanocomposite: Nickel -doped Cerium oxide on reduced graphene oxide (Ni-CeO₂/rGO). The resulting material exhibits exceptional electrocatalytic behavior, showing promise for supercapacitor applications. The Phase morphology, elemental analysis, surface area and oxidation state were confirmed by powder X-ray diffraction studies (PXRD), Raman spectrum, High Resolution Transmission Electron Microscopy (HRTEM), Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-ray (EDX), Brunauer-Emmett Teller (BET) and XPS respectively. Electrochemical analysis involving cyclic voltammetry (CV), Galvanostatic charge/ discharge, and Electrochemical impedance spectroscopy (EIS). The specific capacitance is 262.1Fg^-1, 504Fg^-1, and 728Fg^-1 for CeO₂, CeO₂/rGO, Ni-CeO₂/rGO it depicts its suitability for energy storage. This study establishes the Ni-CeO₂/rGO nanocomposite as a highly effective material for advanced energy storage applications.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"6 ","pages":"Article 100117"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000609/pdfft?md5=33cc1f0d20dde60412f0cde16b20beb7&pid=1-s2.0-S2949839224000609-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141244386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of lignin microcapsules via interfacial crosslinking using deep eutectic solution to dissolve lignin","authors":"Yan Wang ,&nbsp;Bingxia Xu ,&nbsp;Shaolin Ge ,&nbsp;Lifeng Yan","doi":"10.1016/j.scenv.2024.100120","DOIUrl":"https://doi.org/10.1016/j.scenv.2024.100120","url":null,"abstract":"<div><p>Lignin is a biomacromolecule with multiple functional groups, which can be used as feedstocks for various functional materials. Lignin microcapsules with the crosslinked shell of lignin have potential applications in various fields. However, the use of toxic organic solvents for preparing lignin microcapsules poses a challenge. In this study, a green solvent called Deep Eutectic Solvent (DES, ChCl-LA) was employed for lignin dissolution. An emulsion of lignin was prepared using soybean oil with the DES dissolving lignin, and crosslinkers like PEGDE or epichlorohydrin facilitated the crosslinking of lignin at the emulsion interface. The resulting lignin microcapsules, with a size of ∼2 μm, were characterized using techniques such as optical microscopy, fluorescence microscopy, scanning electron microscopy, FT-IR, etc. For both NIR imaging and controlled release, the organic molecule BODPY was used as the template. The results demonstrate the successful preparation of size-controlled lignin microcapsules that can serve as nanocarriers for targeted organic molecules</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"6 ","pages":"Article 100120"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000634/pdfft?md5=458f8de809165d866c9cda02d8ede8e7&pid=1-s2.0-S2949839224000634-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141244384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peach seed shell and Aspergillus oryzae as adsorbents for the uptake of acid violet 90 dye from wastewater","authors":"A. Hashem ,&nbsp;Chukwunonso O. Aniagor ,&nbsp;L.A. Mohamed ,&nbsp;Eman M. Abdellah ,&nbsp;Osama Morsy ,&nbsp;A.A. Aly","doi":"10.1016/j.scenv.2024.100115","DOIUrl":"https://doi.org/10.1016/j.scenv.2024.100115","url":null,"abstract":"<div><p>In this study, <em>Aspergillus oryzae</em> (<em>A. Oryzae</em>) biomass and waste peach seed shells (PPSS) were used to create alternative and effective adsorbents. Acid Violet 90 (AVD) dye was removed from wastewater using the as-prepared adsorbents. Different process variables like pH (2–11), contact period (0–180 min), and adsorbent mass (0.2–2.0 g/L) were examined. The solution pH had a synergistic effect on the improved removal of AVD and the optimal adsorption removal for the PPSS and the <em>A. Oryzae</em> adsorbent occurred at pH 2.0 and pH 5.0, respectively. The findings demonstrated that, in comparison to <em>A. Oryzae</em>, PPSS reported a greater AVD adsorption (mg/g). The equilibrium time for the adsorption process was attained within 180 min for both adsorbents. The adsorption kinetics modelling results showed a good fit with pseudo-second-order kinetics, for both adsorbents, with average R² values of 0.999 (for PPSS) and 0.997 (for <em>A. Oryzae</em>). Similarly, the isotherm modelling results confirmed the good fitting of the Langmuir isotherm model for <em>A. Oryzae</em> (R² = 0.999) and the Freundlich model for PPSS (R² = 0.997). The maximum adsorption capacity (q_max) of 55.0 and 94.92 mg/g was recorded for <em>A. Oryzae</em> and PPSS, respectively. Mechanistic investigation of the present system suggests that both intraparticle diffusion and surface sorption mechanisms control the adsorption rate. As agro materials, both adsorbents are composed of mostly oxygen-based surface functional groups like the –OH, –C = O, -C-O-C, and multiple carbon-carbon bonds, all contributed to the synergistic mechanism interaction between the adsorbent and AVD dye in this study. This study, therefore, revealed that the PPSS and <em>A. Oryzae</em> may be very helpful for removing anionic dye from contaminated wastewater, indicating its potential for useful application in the removal of other major pollutants.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"6 ","pages":"Article 100115"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000580/pdfft?md5=ed42c2c07a7d15421e3e9181afd40d02&pid=1-s2.0-S2949839224000580-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141286439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of particle size and application rate of steel (Linz-Donawitz, LD) slag on heavy metal built-up in soil and their transfer dynamics in spinach (Spinacia oleracea L.)","authors":"Vinita Mulodia ,&nbsp;Archna Suman ,&nbsp;Shiv Prasad ,&nbsp;Sneha Kumari ,&nbsp;Kalidindi Usha ,&nbsp;Bhupinder Singh","doi":"10.1016/j.scenv.2024.100112","DOIUrl":"10.1016/j.scenv.2024.100112","url":null,"abstract":"<div><p>Linz-Donawitz (LD) slag is a solid industrial waste generated during the production of steel. In general, the amount of LD slag produced varies from 300 to 400 kg ton^-1 of steel. Presently only 25 % of the steel slag, which is also rich in various macro and micro-nutrients, is being reused in India compared to 70–100 % in other countries. The present study deals with the possibility of utilizing LD slagas a nutrient rich low-cost soil conditioner in agriculture. An experiment was thus conducted to determine the effect of LD slag application at rates 0.25, 0.50 and 1 t ha^-1 in two particle sizes i.e., &lt;50 and &lt;100 microns (µ) on spinach (<em>Spinacia oleracea</em> L.). Physico-chemical, biological characteristics and heavy metals in soil and latter’s transfer from soil to the foliage was also determined. The results showed that an application of LD slag @1 tha^-1 and 100 µ particle size significantly improved the soil microbial count and activity of enzymes such as dehydrogenase and phosphatase while at a smaller particle size of LD slag (50 µ) @ 1 tha^-1, a significant increase in the foliage yield of spinach was observed. The risk due to heavy metals present in the steel slag as evidence by indicator of heavy metal content in plants i.e. transfer factor (TF), hazard quotient (HQ) and hazard index (HI) was within the permissible range. However long-term effect of steel slag application on ecotoxicity and phytotoxicity levels must be deciphered. In conclusion the application of LD slag in spinach does not negatively impact the soil health and in fact causes an increase in the economic yield of spinach.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"6 ","pages":"Article 100112"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000555/pdfft?md5=bc3b35239ab98938570849d11d1cff4f&pid=1-s2.0-S2949839224000555-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141134003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Removal of cadmium and zinc from water using sewage sludge-derived biochar","authors":"Ahsan Shah ,&nbsp;Julia Zakharova ,&nbsp;Maryam Batool ,&nbsp;Matthew P. Coley ,&nbsp;Arun Arjunan ,&nbsp;Alisha J. Hawkins ,&nbsp;Timothy Bolarinwa ,&nbsp;Shreah Devi ,&nbsp;Anusha Thumma ,&nbsp;Craig Williams","doi":"10.1016/j.scenv.2024.100118","DOIUrl":"https://doi.org/10.1016/j.scenv.2024.100118","url":null,"abstract":"<div><p>This research reveals the adsorption of cadmium (Cd²⁺) and zinc (Zn⁺²) from water using sewage sludge-derived biochar pyrolysed at 700 °C (SSB). The morphology and particle characteristics of SSB were characterised through scanning electron microscopy (SEM), particle size distribution (PSD), fourier transform infrared (FTIR), X-ray diffraction (XRD), and X-ray fluorescence (XRF). The adsorption study showed that the optimum contact times for removing Zn²⁺ and Cd²⁺ were 80 and 140 minutes, respectively. 95.51% Zn²⁺ and 97.54% Cd²⁺ could be removed from spiked solutions featuring 50 mg/L of Zn²⁺ and 50 mg/L Cd²⁺, each treated with 25 g/L biochar. The optimum pH of the solutions was 8–9 at a temperature of 40°C, indicating some precipitation of the metal ions at an alkaline pH. The highest adsorption capacity of SSB for Cd²⁺ and Zn²⁺ was found to be 3.02 and 2.51 mg/g, respectively, which compares favourably with other adsorbents. The isotherm studies confirmed experimental data to closely follow the Langmuir isotherm model at an R² value of 0.9846 and 0.9816 for Cd²⁺ and Zn²⁺, respectively. The kinetic study confirmed the physical interaction between the adsorbents and the adsorbate. The spontaneous and exothermic nature of the process was confirmed by negative values of change in Gibbs free energy (ΔG) and enthalpy (ΔH). SSB could be regenerated for 6 cycles. Overall, this study explores sustainability, recycling, and waste management by offering SSB as a potentially cost-effective and environment-friendly solution to remove Cd²⁺ and Zn²⁺ from water.</p></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"6 ","pages":"Article 100118"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949839224000610/pdfft?md5=2596cfeacdec632652eae1b24acf7271&pid=1-s2.0-S2949839224000610-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141244385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}