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1. The effect of Fe³⁺ ions on the electrochemical behaviour of ocean manganese nodule reduction leaching in sulphuric acid solution

Author:
Jinxing Kang; Yayun Wang; Yunfei Qiu
Source:
RSC advances 2022 v.12 no.2 pp. 1121-1129
ISSN:
2046-2069
Subject:
sulfuric acid,   etc   ; electrochemistry; hydrogen; hydrolysis; manganese; manganese monoxide; voltammetry;     Show all 7 Subjects
Abstract:
... The effect of Fe³⁺ ions on the ocean manganese nodule reductive leaching in imitated sulphuric acid solutions was investigated. This work is presented in two courses, including the influence of Fe³⁺ ions on valuable metal extraction and the electrochemical reductive dissolution of manganese nodules. The results show that the beneficial effects of Fe³⁺ ion can be interpreted based on two aspects: t ...
DOI:
10.1039/d1ra08440b

2. Theoretical study of the reaction mechanism between Criegee intermediates and hydroxyl radicals in the presence of ammonia and amine

Author:
Yuanyuan Wei; Fei Xu; Xiaohui Ma; Lei Li; Wei Wang; Xinxi Huo; Qingzhu Zhang; Wenxing Wang
Source:
Chemosphere 2022 v.287 pp. 131877
ISSN:
0045-6535
Subject:
sulfuric acid,   etc   ; ammonia; hydrogen; ozonolysis; quantum mechanics; reaction mechanisms;     Show all 6 Subjects
Abstract:
... Criegee intermediates (CIs), formed in the ozonolysis process of unsaturated hydrocarbons, play an important role in the formation of OH radicals, sulfuric acid, and aerosols. In this study, quantum chemical calculations were carried out to investigate the mechanism for the reaction of Criegee intermediates [involving CH₂OO, CH₃CHOO and (CH₃)₂COO] with OH radicals at the level of CCSD(T)/jun-cc-pV ...
DOI:
10.1016/j.chemosphere.2021.131877

3. An efficient and clean method for the selective separation of arsenic from scrap copper anode slime containing high arsenic and tin

Author:
Shuo Liu; Zijian Su; Yujuan Cai; Tao Jiang; Yuanbo Zhang
Source:
Journal of cleaner production 2022 v.354 pp. 131640
ISSN:
0959-6526
Subject:
sulfuric acid,   etc   ; anodes; arsenic; electrolytes; leachates; purification methods; tin; volatilization;     Show all 8 Subjects
Abstract:
... As the different properties of conventional copper anode slime and scrap copper anode slime (SCAS), the disposal of arsenic before the extraction process is very important. There was simultaneous leaching of As and Sn when the hydrometallurgical process or the sulfation roasting-leaching was applied to treat arsenic in the SCAS. It was difficult to achieve the effective separation of arsenic and t ...
DOI:
10.1016/j.jclepro.2022.131640

4. Insight into the anti-corrosion performance of two food flavors as eco-friendly and ultra-high performance inhibitors for copper in sulfuric acid medium

Author:
Bochuan Tan; Shengtao Zhang; Xianlong Cao; Anqing Fu; Lei Guo; Riadh Marzouki; Wenpo Li
Source:
Journal of colloid and interface science 2022 v.609 pp. 838-851
ISSN:
0021-9797
Subject:
sulfuric acid,   etc   ; adsorption; atomic force microscopy; copper; electrochemistry; sorption isotherms;     Show all 6 Subjects
Abstract:
... 2,5-dihydroxy-1,4-dithiane (DDD) and 2,5-dimethy- [1.4] dithiane-2,5-diol (DTDD) two food flavors as environmentally-friendly inhibitors for Cu in 0.5 mol/L H₂SO₄ media were researched via theoretical calculation and experimental ways. Electrochemical measurement data showed that DDD and DTDD can exhibit high level anti-corrosion feature. The anti-corrosion efficiency of DDD and DTDD were as high ...
DOI:
10.1016/j.jcis.2021.11.085

5. Optimized biogenic sulfuric acid production and application in the treatment of waste incineration residues

Author:
Klemens Kremser; Melanie Maltschnig; Herta Schön; Aleksander Jandric; Martin Gajdosik; Tomas Vaculovic; Jiri Kucera; Georg M. Guebitz
Source:
Waste management 2022 v.144 pp. 182-190
ISSN:
0956-053X
Subject:
sulfuric acid,   etc   ; bioleaching; circular economy; iron; pH; sulfur; waste incineration;     Show all 7 Subjects
Abstract:
... The biological leaching of metals from different waste streams by bacteria is intensively investigated to address metal recycling and circular economy goals. However, usually external addition of sulfuric acid is required to maintain the low pH optimum of the bacteria to ensure efficient leaching. Extremely acidophilic Acidithiobacillus spp. producing sulfuric acid and ferric iron have been invest ...
DOI:
10.1016/j.wasman.2022.03.025

6. Selective extraction and recovery of tin from hazardous zinc-leaching residue by oxalic acid/sulfuric acid mixture leaching and hydrolytic precipitation

Author:
Yizhuang Wang; Bingbing Liu; Hu Sun; Yanfang Huang; Guihong Han
Source:
Journal of cleaner production 2022 v.342 pp. 130955
ISSN:
0959-6526
Subject:
sulfuric acid,   etc   ; hydrolysis; lead; oxalic acid; reducing agents; sediments; tin;     Show all 7 Subjects
Abstract:
... Zinc-leaching residue (ZLR) with 0.46% Sn and 54% Pb brings potential threats to environment but is worthy to recover valuable metals. Reduction of Sn(IV) to Sn(II) is critical for tin extraction. In this work, selective extraction and recovery of tin from ZLR via oxalic acid/sulfuric acid leaching and hydrolytic precipitation was proposed. Various reductants were attempted, and the oxalic acid sh ...
DOI:
10.1016/j.jclepro.2022.130955

7. Coupling of pretreatment and pyrolysis improving the production of levoglucosan from corncob

Author:
Zihao Liu; Xuesong Tan; Xinshu Zhuang; Haiping Yang; Xu Chen; Qingfeng Wang; Hanping Chen
Source:
Fuel processing technology 2022 v.228 pp. 107157
ISSN:
0378-3820
Subject:
sulfuric acid,   etc   ; biomass; corn cobs; hemicellulose; lignin; pyrolysis; sodium hydroxide; wastes;     Show all 8 Subjects
Abstract:
... Influence of organic biphasic pretreatment on levoglucosan (LG) yield from biomass pyrolysis was investigated with dilute sulfuric acid and dilute sodium hydroxide pretreatment as comparison, simultaneously, the mechanism was explored in depth. It was found that with monophasic (water) conditions, dilute sulfuric acid and dilute sodium hydroxide pretreatment, the yield of LG was all increase large ...
DOI:
10.1016/j.fuproc.2021.107157

8. Insight into the thermal kinetics and thermodynamics of sulfuric acid plant sludge for efficient recovery of sulfur

Author:
Vikash Singh; Vimal Chandra Srivastava
Source:
Waste management 2022 v.140 pp. 233-244
ISSN:
0956-053X
Subject:
sulfuric acid,   etc   ; activation energy; environmental impact; sludge; sulfur; volatilization; waste management;     Show all 7 Subjects
Abstract:
... The disposal and management of sulfur-rich sludges (SRS) are challenging issues for the industries due to their adverse environmental impact. The present study reports the detailed characterizations and assessment of the thermo-kinetics of sludge generated from the sulfuric acid plant. In addition, the sulfur was retrieved with the help of the evaporation–condensation method. In the active devital ...
DOI:
10.1016/j.wasman.2021.11.015

9. Integrated carbothermic smelting – Acid baking – Water leaching process for extraction of scandium, aluminum, and iron from bauxite residue

Author:
John Anawati; Gisele Azimi
Source:
Journal of cleaner production 2022 v.330 pp. 129905
ISSN:
0959-6526
Subject:
sulfuric acid,   etc   ; aluminum; bauxite; iron; scandium; slags; sodium; sulfates; sulfur; temperature;     Show all 10 Subjects
Abstract:
... A closed-loop valorization process, combining carbothermic smelting and acid baking – water leaching was developed to recover scandium, aluminum, and iron from bauxite residue, a major side product of aluminum production. This process employs carbothermic smelting to recover 99% of the iron in the starting residue as crude metallic iron, which can be separated from slag that contains aluminum and ...
DOI:
10.1016/j.jclepro.2021.129905

10. Machine learning techniques for acid sulfate soil mapping in southeastern Finland

Author:
Virginia Estévez; Amélie Beucher; Stefan Mattbäck; Anton Boman; Jaakko Auri; Kaj-Mikael Björk; Peter Österholm
Source:
Geoderma 2022 v.406 pp. 115446
ISSN:
0016-7061
Subject:
sulfuric acid,   etc   ; acid sulfate soils; probability; sulfates; support vector machines; Finland;     Show all 6 Subjects
Abstract:
... Acid sulfate soils are one of the most environmentally harmful soils existing in nature. This is because they produce sulfuric acid and release metals, which may cause several ecological damages. In Finland, the occurrence of this type of soil in the coastal areas constitutes one of the major environmental problems of the country. To address this problem, it is essential to precisely locate acid s ...
DOI:
10.1016/j.geoderma.2021.115446

11. Mono-alkyl esters (biodiesel) production from wastewater sludge by esterification

Author:
Yousuf Jamal; Izhar Hussain Shah; Hung-Suck Park
Source:
Biofuels 2022 v.13 no.3 pp. 351-357
ISSN:
1759-7277
Subject:
sulfuric acid,   etc   ; biodiesel; catalysts; esterification; lipids; methanol; sludge; solvents; temperature; wastewater;     Show all 10 Subjects
Abstract:
... To realize higher yields of mono-alkyl esters (Biodiesel) without sacrificing the environment and food sources; various researchers have considered utilizing different waste materials. In this work lipid extraction and their conversion into esters from wastewater sludge was investigated using a mixture of polar and non-polar solvents, methanol and homogeneous sulfuric acid catalyst. The effect of ...
DOI:
10.1080/17597269.2019.1699749

12. RID serve as a more appropriate measure than phenol sulfuric acid method for natural water-soluble polysaccharides quantification

Author:
Canbiao Zeng; Guangying Ye; Guochao Li; He Cao; Zaihua Wang; Shengguo Ji
Source:
Carbohydrate polymers 2022 v.278 pp. 118928
ISSN:
0144-8617
Subject:
sulfuric acid,   etc   ; absorption; dextran; glucose; phenol; quantitative analysis; temperature; water solubility;     Show all 8 Subjects
Abstract:
... With structural diversity of water-soluble polysaccharides, their precise quantitative analysis by phenol‑sulfuric acid method becomes more difficult and challenging. In this study, the quantification analysis of dextran and glucose in phenol sulfuric acid method was compared in this paper. When the concentration is below 90 μg/mL, the quantification of glucose is close to theoretical value, howev ...
DOI:
10.1016/j.carbpol.2021.118928

13. Catalytic Esterification Using Solid Acid Carbon Catalysts Synthesized by Sustainable Hydrothermal and Plasma Sulfonation Techniques

Author:
Sarada Sripada; James R. Kastner
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.11 pp. 3928-3940
ISSN:
1520-5045
Subject:
sulfuric acid,   etc   ; ambient temperature; biomass; catalytic activity; esterification; process design; vapors; wood;     Show all 8 Subjects
Abstract:
... Solid acid carbon catalysts were synthesized from wood activated carbon in granular (GAC) and monolith (ACM) forms using incipient wetness and plasma or hydrothermal methods at sulfonation agent:carbon ratios of 0.62:1 to 1.75:1 [v/w, mL/g], significantly lower than a commonly used ratio of 10:1 (6–16× lower). Yet, esterification rates and yields were comparable to those of catalysts generated wit ...
DOI:
10.1021/acs.iecr.2c00086

14. Innovative bio-acid leaching method for high recovery of critical metals from end-of-life light emitting diodes

Author:
Fatemeh Pourhossein; Seyyed Mohammad Mousavi; Francesca Beolchini
Source:
Resources, conservation, and recycling 2022 v.182 pp. 106306
ISSN:
0921-3449
Subject:
sulfuric acid,   etc   ; Acidithiobacillus thiooxidans; bioleaching; electronic wastes; pH; pulp; risk; waste composition;     Show all 8 Subjects
Abstract:
... The main objective of this work is to introduce a new green recycling process for recovering valuable metals from electronic waste. One of the fastest-growing electronic waste streams is end-of-life light emitting diodes (LEDs). Due to environmental risk and a worldwide shortage of metals, recycling and recovering their valuable metal is an urgent task. In this study, an innovative bio-hydrometall ...
DOI:
10.1016/j.resconrec.2022.106306

15. One-step synthesis of garlic peel derived biochar by concentrated sulfuric acid: Enhanced adsorption capacities for Enrofloxacin and interfacial interaction mechanisms

Author:
Yanjun Zhao; Xintong Liu; Wenhui Li; Kai Huang; Huiqi Shao; Chen Qu; Jiemin Liu
Source:
Chemosphere 2022 v.290 pp. 133263
ISSN:
0045-6535
Subject:
sulfuric acid,   etc   ; adsorption; biochar; carbonization; density functional theory; enrofloxacin; garlic; pyrolysis; thermodynamics;     Show all 9 Subjects
Abstract:
... This study put forward a one-step carbonization method by concentrated sulfuric acid to prepare garlic peel derived biochar, and the synthetic conditions were optimized by L₁₆(4⁵) orthogonal experiments. Notably, in order to study the differences between the proposed synthetic method and the conventional pyrolysis method, the concentrated sulfuric acid carbonized garlic peels biochar (CSGPB) was c ...
DOI:
10.1016/j.chemosphere.2021.133263

16. Acid stable layer-by-layer nanofiltration membranes for phosphoric acid purification

Author:
Shanshan Xu; Rongrong He; Chenjun Dong; Nan Sun; Shuwei Zhao; Hailong He; Hanwei Yu; Yue-Biao Zhang; Tao He
Source:
Journal of membrane science 2022 v.644 pp. 120090
ISSN:
0376-7388
Subject:
sulfuric acid,   etc   ; crosslinking; glutaraldehyde; nanofiltration; pH; permeability; phosphoric acid; phosphorus; sodium; styrene; sulfonates;     Show all 11 Subjects
Abstract:
... The conventional wet process of extracting phosphorus using concentrated sulfuric acid produces crude phosphoric acid rich in multiple ions. High-end applications require purification of the crude phosphoric acid by removing the ions at an affordable cost. At low pH, phosphoric acid mainly exists as a neutral molecule. Nanofiltration (NF) membranes have been proposed to remove multivalent ions whi ...
DOI:
10.1016/j.memsci.2021.120090

17. Alpha-, Beta- and Gamma-Cellulose Quantification and Two-Stage Concentrated-Dilute Acid Lignin Recovery from Three Rice Husks: Lignin Characterization and Depolymerization

Author:
Sandip K. Singh; Paresh L. Dhepe
Source:
Waste and biomass valorization 2022 v.13 no.6 pp. 2963-2977
ISSN:
1877-2641
Subject:
sulfuric acid,   etc   ; acid treatment; biomass; depolymerization; lignin; lignocellulose; molecular weight; rice; silica; wastes;     Show all 10 Subjects
Abstract:
... Investigations on the compositional analysis of lignocellulosic materials and their properties upon recovery are essential to be studied in order to examine the effects of recovery method, their dependency on the substrate, etc. In this work, three rice husks (RHs) samples were subjected for alpha-, beta- and gamma-cellulose, pentosan, and silica quantifications. Correlations between the source of ...
DOI:
10.1007/s12649-022-01704-1

18. Co-hydrothermal carbonization of sewage sludge and coal slime with sulfuric acid for N, S doped hydrochar

Author:
Xiaoyang Yang; Baofeng Wang; Xutao Song; Fenglin Yang; Fangqin Cheng
Source:
Journal of cleaner production 2022 v.354 pp. 131615
ISSN:
0959-6526
Subject:
sulfuric acid,   etc   ; aromatization; carbon; carbonization; coal; hydrochars; nitrogen; sewage sludge; sulfur; synergism; temperature;     Show all 11 Subjects
Abstract:
... In this study, co-hydrothermal carbonization (co-HTC) of sewage sludge(SS) and coal slime(CS) was studied for preparation of N, S doped hydrochar. The effect of blending ratios and temperature was also investigated. The results showed that there existed a synergistic effect during co-HTC, especially at the ratio of 7:3. Compared with the calculated values, the experimental values of the fixed carb ...
DOI:
10.1016/j.jclepro.2022.131615

19. Improved the Electrocatalytic Hydrogen Evolution Performances of Co-MOF Derivatives Through Introducing Zinc Ions by Two Ways

Author:
Ling Qin; Jin-Liang Liu; Xiao-Yan Zhou; Yan-Qing Wang; Xun Sun; Ming-Dao Zhang
Source:
Energy & fuels 2022 v.36 no.11 pp. 5843-5851
ISSN:
1520-5029
Subject:
sulfuric acid,   etc   ; cobalt; energy; hot water treatment; hydrogen production; nitrogen; prices; pyrolysis; zinc;     Show all 9 Subjects
Abstract:
... Due to the high price and rareness of precious metal electrocatalysts, the preparation of cheap, high-efficiency nonprecious metal electrocatalysts is urgently needed. In this paper, a Co-metal-organic framework (MOF) has been synthesized by the hydrothermal method. In view of the poor electrocatalytic performance of pristine Co-MOF, we used it as a template and obtained the Co-MOF-800 electrocata ...
DOI:
10.1021/acs.energyfuels.2c00912

20. A review on the environmental impact of phosphogypsum and potential health impacts through the release of nanoparticles

Author:
Luis F.O. Silva; Marcos L.S. Oliveira; Tito J. Crissien; M. Santosh; Juan Bolivar; Longyi Shao; Guilherme L. Dotto; Juciano Gasparotto; Michael Schindler
Source:
Chemosphere 2022 v.286 pp. 131513
ISSN:
0045-6535
Subject:
sulfuric acid,   etc   ; environmental impact; phosphogypsum; phosphoric acid; phosphorus fertilizers; raw materials; rock phosphate; toxicity;     Show all 8 Subjects
Abstract:
... Many industrial by-products have been disposed along coastlines, generating profound marine changes. Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about 50 times more radioactive as compared to unperturbed soils, is dissolved in diluted sulfuric acid (70%) forming PG and PA. The majority of both, ...
DOI:
10.1016/j.chemosphere.2021.131513