Colloids and Surfaces C: Environmental Aspects最新文献_第8页

Fixed bed adsorption of phosphate by lanthanum carbonate modified microfibrous composite 碳酸镧改性微纤维复合材料固定床吸附磷酸盐的研究

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-05-09 DOI: 10.1016/j.colsuc.2023.100007

Yi Yang

{"title":"Fixed bed adsorption of phosphate by lanthanum carbonate modified microfibrous composite","authors":"Yi Yang","doi":"10.1016/j.colsuc.2023.100007","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100007","url":null,"abstract":"<div><p>A kind of novel adsorbent, lanthanum carbonate modified microfibrous composite (LC-MC), is synthesized through a facile combined wet lay-up paper making and hydrothermal synthesis method. The fixed bed phosphate adsorption results show that LC-MC performs best when initial phosphate concentration is 5 mg/L, flow rate is 2.7 mL/min and bed height is 2 cm, with the maximum breakthrough time of 82.5 h and maximum adsorption capacity of 38.5 mg/g. High bed height and low flow rate are beneficial to the phosphate adsorption. Acid solution conditions benefit the adsorption process but will cause leakage of the lanthanum species (over 8 mg/L). 50 mg/L co-existing anions have no significant effect on the adsorption process, while concentrations more than 100 mg/L obviously inhibit the adsorption. The adsorbent also shows a good regenerability with less than 15 % decrease in adsorption capacity after 5 cycling runs. The adsorption kinetic process can be described better by the Yoon-Nelson model than Adams-Bohart model and Thomas model. Finally, the mechanism study indicates that the formation of phosphate lanthanum is the main reason for phosphate adsorption on LC-MC. Results show that LC-MC is a promising phosphate adsorbent to be used in fixed bed.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100007"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of bacterial surfactants on the phase behavior of miscible pollutants in water 细菌表面活性剂对水中混相污染物相行为的影响

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-07-13 DOI: 10.1016/j.colsuc.2023.100013

Vedant Patel , Alejandro G. Marangoni , Saeed Mirzaee Ghazani , Thamara Laredo , Jarvis Stobbs , Erica Pensini

{"title":"Effect of bacterial surfactants on the phase behavior of miscible pollutants in water","authors":"Vedant Patel , Alejandro G. Marangoni , Saeed Mirzaee Ghazani , Thamara Laredo , Jarvis Stobbs , Erica Pensini","doi":"10.1016/j.colsuc.2023.100013","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100013","url":null,"abstract":"<div><p>Rhamnolipids are bacterial amphiphiles. In addition to emulsifying hydrophobic solvents, they affect the phase behaviour of miscible solvents. In mixtures of toluene and water, rhamnolipids mediate the migration of metal ions (e.g., iron and copper) from the water to the toluene phase. Also, rhamnolipids phase separate the miscible solvent tetrahydrofuran (THF) from water, yielding emulsions even in the absence of toluene. This is because they compete with THF for hydrogen (H) bonding with similar water species. Water is an ensemble of species, including single donors (SD) or double (DD) donors, and single acceptors (SA) or double (DA) acceptors. In pure water, SD-SA and DD-DA have similar abundance and are dominant, as shown by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR). With 50–200 g/L rhamnolipids, a water species intermediate between SD-SA and DD-DA is dominant, indicating that rhamnolipid-water interactions mainly occur through this species. This same species primarily interacts with THF, at 50–80% THF. At lower THF percentages, a similar (albeit not identical) species dominates, namely DD-DA, explaining separation. Emulsions are THF in water, as demonstrated by synchrotron mid-infrared spectro-microscopy and confocal microscopy using a hydrophobic dye. Synchrotron small angle X-ray scattering (SAXS) showed that rhamnolipids self- assemble into micelles, which contain THF. These findings have potential implications for miscible pollutant migration in groundwater, and their toxicity to rhamnolipid-secreting bacteria.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100013"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49719775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Synthesis, Characterization and Potential Application of Functionalised Binary Metallic Sulphide for Water Reclamation 功能化二元金属硫化物的合成、表征及其在水回收中的潜在应用

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-05-31 DOI: 10.1016/j.colsuc.2023.100011

Md. Sajid, Atul Sharma, Arshi Choudhry, Saif Ali Chaudhry

{"title":"Synthesis, Characterization and Potential Application of Functionalised Binary Metallic Sulphide for Water Reclamation","authors":"Md. Sajid, Atul Sharma, Arshi Choudhry, Saif Ali Chaudhry","doi":"10.1016/j.colsuc.2023.100011","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100011","url":null,"abstract":"<div><p>The present paper highlights the synthesis of novel Citric acid functionalized-Nickel-Cobalt-Sulphide nanoparticles, abbreviated as Ni-Co-S@Ct, via simple co-precipitation method. The prepared nanoparticles have been characterized using several analytical techniques, like XRD, HR-TEM, TGA, HR-SEM, FT-IR, XPS and BET and zeta potential measurements. The prepared Ni-Co-S@Ct nanoparticles have been investigated for the adsorptive removal of different types of pollutants, namely, cationic and anionic dyes, and arsenic ions and interestingly all of these pollutants were removed with high efficiency. The equilibrium sorption capacity of Ni-Co-S@Ct has been found 90.91 mg/g for Methylene blue, 232.55 mg/g for Crystal violet, 357.14 mg/g for Nile blue, 142.9 mg/g for Congo red, 1111 mg/g for As(III) and 2000 mg/g for As(V). The sorption data for these pollutants fitted well to Freundlich and Temkin isotherms which showed the attachment of these ions/molecules to the specific sites at Ni-Co-S@Ct heterogeneous surface. The kinetics of sorption process was explained using the pseudo-second order model which suggested pollutant ion attachment at specific sites at the surface of Ni-Co-S@Ct. The FT-IR and Zeta potential analysis led to the conclusion that electrostatic interaction and metal complexation might be the prominent pathways adopted by the Ni-Co-S@Ct for the sorption of dyes and arsenic ions. The nanomaterials was further investigated for the removal of dyes from the mixture of dyes and the results have been quite promising as the material was found effective for elimination of four dyes simultaneously. Therefore, the high adsorption capacity, low-cost and facile synthesis, takes Ni-Co-S@Ct a step ahead in environmental remediation and wastewater treatment technology.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100011"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Role of hydrogen bonding on solvent separation using amphiphilic sorbitan ester 氢键在两亲性山梨醇酯溶剂分离中的作用

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-03-15 DOI: 10.1016/j.colsuc.2023.100004

Bibiana Bartokova , Alejandro G. Marangoni , Thamara Laredo , Erica Pensini

{"title":"Role of hydrogen bonding on solvent separation using amphiphilic sorbitan ester","authors":"Bibiana Bartokova , Alejandro G. Marangoni , Thamara Laredo , Erica Pensini","doi":"10.1016/j.colsuc.2023.100004","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100004","url":null,"abstract":"<div><p>Tetrahydrofuran (THF) and water are miscible and interact trough hydrogen (H) bonds. Span 80 (sorbitan ester) is soluble in THF, but not water. Nonetheless, Span 80 H bonds with water, as shown by attenuated total reflectance – Fourier transform infrared spectroscopy. In pure water, species are single (SD) or double (DD) donors, and single (SA) or double (DA) acceptors. In pure water, SD-SA and DD-DA are dominant and have similar abundance. Span 80 and THF alter the distribution of water species. When THF and Span 80 compete for the same water species, THF separation from water is most effective. Span 80 induces a marked shift of SD-SA to higher wavenumbers, which are close to DD-DA. This species intermediate between DD-DA and SD-SA is dominant, indicating that Span 80 mainly interacts with it. This same species is also dominant in THF-water mixtures containing 50–70% THF. Instead, DD-DA is dominant up to 40% THF, while DD-SA dominate at the highest THF percentages. Bottle tests show that Span 80 separates THF and water into bulk phases with 50–70% THF within 1 hr. In contrast, outside this THF range, emulsions are stable for more than 1 hr, as observed by either light scattering or optical microscopy. In mixtures with 50–70% THF, bulk phase separation occurs within 1 hr, because Span 80 competes with THF for the same water species. Separation is poorer outside of this THF range, where Span 80 and THF interact with different water species.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100004"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Preparation and application of phosphorylated starch as a flocculant for cationic dyes and heavy metal 磷酸淀粉对阳离子染料和重金属絮凝剂的制备及应用

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-09-17 DOI: 10.1016/j.colsuc.2023.100019

Sana Azeroual , Hind Wattati , Ahmed Belfkira , Moha Taourirte , Rachid Jalal

{"title":"Preparation and application of phosphorylated starch as a flocculant for cationic dyes and heavy metal","authors":"Sana Azeroual , Hind Wattati , Ahmed Belfkira , Moha Taourirte , Rachid Jalal","doi":"10.1016/j.colsuc.2023.100019","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100019","url":null,"abstract":"<div><p>In this study, phosphorylated starch (PS) was prepared and utilized to adsorb methylene blue (MB), safranin (SF) and copper Cu (II) ions from an aqueous solution. Scanning electron microscopy (SEM) and infrared spectroscopy (IR) were used to investigate the microstructure of phosphorylated starch. The effects of adsorption period, adsorbent dose, pH, the presence of replacement groups, starting concentrations, and temperature were all studied in batch adsorption experiments. According to the findings, 10 min of adsorption time is enough to attain the adsorption equilibrium. The adsorption kinetic model can be aptly represented as the pseudo-second order (PSO). The adsorption isotherm model, is appropriately described by Freundlich and Redlich Peterson, with maximum adsorption capacity of PS was 1036 mg/g, 14994 mg/g and 1535 mg/ g for MB, Cu and SF, respectively. With fast equilibrium time (10–20 min), high adsorption efficiency (97–99%) and the regeneration and reusability of PS that can achieved, more than 3 cycles. The PS powder was a promising remediation for polluted wastewater.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100019"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Treatment of steel industry wastewater by Poly-Aluminum-Ferric-Silicate coagulant prepared from coal gasification ash 煤气化灰制备聚铝-铁-硅酸盐混凝剂处理钢铁工业废水

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-05-22 DOI: 10.1016/j.colsuc.2023.100010

Junhong Yi , Defu Xu , Die Wu , Hua Fang , Hong Yang

{"title":"Treatment of steel industry wastewater by Poly-Aluminum-Ferric-Silicate coagulant prepared from coal gasification ash","authors":"Junhong Yi , Defu Xu , Die Wu , Hua Fang , Hong Yang","doi":"10.1016/j.colsuc.2023.100010","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100010","url":null,"abstract":"<div><p>The coal gasification industry generates a large amount of coal gasification ash (CGA) which can contaminate environment by seeping harmful substances into both soil and water. In this study, CGA was used for the preparation of Poly-Aluminum-Ferric-Silicate coagulant (PAFSiC) to treat steel industry wastewater, and the effects of acid leaching, alkaline leaching, and copolymerization stages were investigated. Our results indicated that the dissolution rates of iron and aluminum from CGA were 53.49% and 55.43%, respectively, under leaching temperature at 95 °C, time at 1.4 h, and concentration of HCl at 5.1 mol/L. The dissolution rate of silicon from the residue of CGA leaching by HCl was 41.44% under leaching temperature at 75 °C, time at 0.5 h, and concentration of NaOH at 5 mol/L. The PAFSiC prepared under (Fe+Al)/Si molar ratio at 4.3 indicated the best coagulation performance, and its removal rates for turbidity, color, and chemical oxygen demand (COD) from steel industry wastewater were 93.69%, 36.47%, and 62.66%, respectively. Compared to commercial polysilicate aluminum ferric (PSAF), PAFSiC increased removal rates of for turbidity, color, and COD by 28.67%, 18.21%, and 7.38%, respectively. The coagulation efficiency of PAFSiC was influenced by pH; a removal rate of color of 54.43% was recorded from the steel industry wastewater using PAFSiC prepared at pH of 2. PAFSiC synthesized from CGA under (Fe+Al)/Si molar ratio at 4.3 exhibited a branching amorphous structure with spatial stereoscopic sense, resulting in higher capacity to bind with and remove contaminates. Our results underline the potent performance of PAFSiC as a viable solution to alleviate pollution from the steel industry.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100010"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A facile method for studying competitive sorption from binary mixtures of dyes 一种研究二元混合染料竞争吸附的简便方法

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-05-13 DOI: 10.1016/j.colsuc.2023.100006

Ernani D.S. Filho, Clara D.M. Cavalcante, Vivian Y. Brizola, Marcia R. Pereira, José L.C. Fonseca

引用次数: 0

Identification of microbial communities and functional genes in an anaerobic-anoxic-oxic (A2O) process in responding to the iron-carbon micro-electrolysis (ICME) pre-treatment of electroplating wastewater based on high-throughput sequencing 基于高通量测序的电镀废水铁碳微电解(ICME)预处理过程中厌氧-缺氧-缺氧(A2O)过程微生物群落和功能基因鉴定

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-05-18 DOI: 10.1016/j.colsuc.2023.100009

Jingsi Gao , Huixiang Wang , Yuli Yang , Jianfeng Lv , Jiaheng Wen , Jia Zhu , Jianfeng Zhou

{"title":"Identification of microbial communities and functional genes in an anaerobic-anoxic-oxic (A2O) process in responding to the iron-carbon micro-electrolysis (ICME) pre-treatment of electroplating wastewater based on high-throughput sequencing","authors":"Jingsi Gao , Huixiang Wang , Yuli Yang , Jianfeng Lv , Jiaheng Wen , Jia Zhu , Jianfeng Zhou","doi":"10.1016/j.colsuc.2023.100009","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100009","url":null,"abstract":"<div><p>Industrial wastewater contains high concentrations of refractory organic carbons, resulting in a low biodegradability difficult for the following biological treatments. The iron-carbon micro-electrolysis (ICME) was developed to break down the larger organic molecules and enhance the biodegradability. Previous ICME pretreatment coupling studies focused primarily on pharmaceutical, dye, and medical wastewater. In this study, the ICME was applied to treat the electroplating wastewater with surfactants, followed by an anaerobic-anoxic-oxic (A<sup>2</sup>O) biological process. When the ratio of the ICME-treated wastewater was low (10 %), the strike on nutrient removal efficiency (chemical oxidation demand, ammonia, total nitrogen, and total phosphate) was almost negligible. With the increase of ICME-treated wastewater up to 50 %, the removal efficiency gradually decreased, but the effluent water quality still met the discharge standard. Meanwhile, a shift of microbial communities in the three zones was also observed after the 50-day incubation. The abundance of <em>Hydrogenophaga</em>, <em>Chitinophagaceae</em>, and <em>Lentimicrobiaceae</em> all increased, which may be responsible for the degradation of refractory organics in the oxic and anaerobic zones. The functional gene analysis indicated that the adaptation of microbial communities was probably related to cell-to-cell communications and the transportation of molecules across the cell membrane. The microbial community and functional gene analysis revealed the adaptation of the microorganisms to the industrial wastewater. This study provides new insights into the ICME to enhance the biodegradability of electroplating wastewater for A<sup>2</sup>O treatment.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100009"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Nanostructured Zr-Mn binary hydrous oxide as an effective adsorbent for arsenic removal from water and groundwater 纳米结构Zr-Mn二元氧化锆作为水和地下水中砷的有效吸附剂

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-10-31 DOI: 10.1016/j.colsuc.2023.100022

Gaosheng Zhang , AKM Khorshed Alam , J. Paul Chen

{"title":"Nanostructured Zr-Mn binary hydrous oxide as an effective adsorbent for arsenic removal from water and groundwater","authors":"Gaosheng Zhang , AKM Khorshed Alam , J. Paul Chen","doi":"10.1016/j.colsuc.2023.100022","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100022","url":null,"abstract":"<div><p>It is well known that arsenic is a very harmful toxin to humans. Among arsenic species, arsenite is more toxic and more difficult to remove from water than arsenate. In this study, a nanostructured Zr-Mn binary hydrous oxide was synthesized using one-step simultaneous oxidation and coprecipitation method, aiming at removing both arsenate and arsenite effectively and simultaneously. The Zr-Mn binary hydrous oxide particles were aggregated with smaller nanosized particles, resulting in a rough surface. The hydrous oxide was very effective for both As(V) and As(III) removal from water. The maximal sorption capacities for As(V) and As(III) were 52 and 96 mg/g at neutral environment, respectively. The higher sorption capacity for As(III) may be attributed to the As(III) oxidation and reductive dissolution of manganese dioxide, which resulted in the formation of new sorptive sites for arsenic at the solid surface. The presence of sulfate and carbonate had no significantly influence in the arsenic removal. However, the presence of phosphate greatly decreased the removal, especially at high concentrations. Furthermore, the performance of Zr-Mn binary hydrous oxide was further confirmed by an adsorption study with a groundwater. Additionally, the leaching of arsenic from the used sorbent was less serious, indicating that it may not be hazard to the environment after the landfill disposal. Due to its excellent arsenic removal performance and the simple, low-cost synthesis process, the Zr-Mn binary hydrous oxide could be a promising alternate for both As(V) and As(II) simultaneous removal from water or groundwater without the oxidation pretreatment.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100022"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92150505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly efficient adsorption of aqueous iodine on polythiophene/α-manganese dioxide nanocomposites 聚噻吩/α-二氧化锰纳米复合材料对水中碘的高效吸附

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-08-26 DOI: 10.1016/j.colsuc.2023.100017

Aakash Waghmare , Roshni Rathore , Archna Pandey , Vimlesh Chandra

{"title":"Highly efficient adsorption of aqueous iodine on polythiophene/α-manganese dioxide nanocomposites","authors":"Aakash Waghmare , Roshni Rathore , Archna Pandey , Vimlesh Chandra","doi":"10.1016/j.colsuc.2023.100017","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100017","url":null,"abstract":"<div><p>The discharge of wastewater containing toxic and radioactive iodine into water leads to a negative impact on aquatic life, animals and humans. In this work, we synthesized Polythiophene (PTh) and Polythiophene/α-MnO<sub>2</sub> nanocomposite (PTh/α-MnO<sub>2</sub>) by the chemical route and used them to remove iodine from aqueous solution. The surface morphology showed presence of rod-shaped α-MnO<sub>2</sub> with a size of 25–200 nm embedded in polythiophene. The interplaner distance was found to be 0.7 nm corresponds to the (211) plane. Specific surface area of PTh and PTh/α-MnO<sub>2</sub> nanocomposite was found to be 22.15 m<sup>2</sup>/g and 51.98 m<sup>2</sup>/g respectively and equilibrium I<sub>2</sub> adsorption capacity was found to be (q<sub>e</sub>) 266.08 mg/g and 304.21 mg/g respectively. Langmuir isotherm (R<sup>2</sup> = 0.99) fitted well compared to Freundlich isotherm (R<sup>2</sup> = 0.84) indicates monolayer adsorption of iodine onto adsorbent surface. The adsorbent is stable, recyclable, high adsorption capacity, and environment friendly so it can be used at large scale for treatment of I<sub>2</sub> contaminated water.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100017"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0