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1. Mechanisms of Oxygen Passivation on Surface Defects in MAPbI₃ Revealed by First-Principles Study

Author:
Zhou, Yipeng; Hu, Xixi; Xie, Daiqian; Tian, Yuxi
Source:
Journal of physical chemistry 2020 v.124 no.6 pp. 3731-3737
ISSN:
1932-7455
Subject:
minerals,   etc   ; adsorption; lead; oxygen;     Show all 4 Subjects
Abstract:
... Perovskite materials have shown ultrasensitivity to atmospheres especially to O₂, which is due to the passivation effect of the surface defects. Identification of the chemical nature of the surface defects is thus of crucial importance for fundamental understanding of these materials, which is extremely difficult by experimental characterization. In this work, we systematically studied the adsorpt ...
DOI:
10.1021/acs.jpcc.0c00157

2. Impacts of mineral resources: Evidence from county economies in China

Author:
He, Xiaoping; Mou, Dunguo
Source:
Energy policy 2020 v.136 pp. 111088
ISSN:
0301-4215
Subject:
mineral resources; minerals,   etc   ; employment; industrialization; manufacturing; markets; mining; China;     Show all 8 Subjects
Abstract:
... the literature proposes that a booming minerals sector leads to a development curse. The mineral markets in China experienced a prolonged boom over the period of 2000–2010. We empirically examine the effects of mineral resources on employment in county economies during the boom. We consider the endogeneity of the resource measure and employ an instrumental variables approach to resolve the problem ...
DOI:
10.1016/j.enpol.2019.111088

3. Preconcentration of ultrafine ilmenite ore using a superconducting magnetic separator

Author:
Shen, Shuaiping; Yuan, Zhitao; Liu, Jiongtian; Meng, Qingyou; Hao, Haiqing
Source:
Powder technology 2020 v.360 pp. 1-9
ISSN:
0032-5910
Subject:
minerals,   etc   ; magnetic fields; powders; slurries;     Show all 4 Subjects
Abstract:
... The ilmenite lain in ultrafine ilmenite ore cannot be treated easily. In this study, a superconducting magnetic separator (SMS) was proposed to preconcentrate the ultrafine ilmenite. During this process, the essential condition for capturing the ilmenite from the ultrafine ore, key technology for obtaining an efficient preconcentration, and analysis of the ilmenite concentrates were investigated w ...
DOI:
10.1016/j.powtec.2019.09.074

4. Conditions during the formation of granitic magmas by crustal melting – Hot or cold; drenched, damp or dry?

Author:
Clemens, John D.; Stevens, Gary; Bryan, Scott E.
Source:
Earth-science reviews 2020 v.200 pp. 102982
ISSN:
0012-8252
Subject:
minerals,   etc   ; cold; melting; rocks; temperature;     Show all 5 Subjects
Abstract:
... Granitic magmas extracted from crustal sources can form over a wide variety of P, T and aH₂O conditions. Both fluid-present and effectively fluid-absent conditions can yield granitic magmas, though the majority are formed through high-T, fluid-absent reactions because, in the deep crust, most available H₂O within rock bodies is contained within minerals rather than in free fluids. Fluid-present pa ...
DOI:
10.1016/j.earscirev.2019.102982

5. Complex resistivity survey for the evaluation of ground reinforcement in a karst area

Author:
Son, Jeong-sul; Song, Seo Young; Nam, Myung Jin
Source:
Engineering geology 2020 v.269 pp. 105555
ISSN:
0013-7952
Subject:
clay minerals,   etc   ; karsts; subsidence; surveys; Korean Peninsula;     Show all 5 Subjects
Abstract:
... A complex resistivity (CR) survey was used to evaluate ground reinforcement following the injection of mortar, which is rich in clay minerals known to show strong induced polarization effects. CR surveys were used to determine the distribution of injected mortar along six survey lines parallel to a road in a karst area in Yongweol-ri, Muan-gun, Korea, which had suffered from ground subsidence and ...
DOI:
10.1016/j.enggeo.2020.105555

6. Mineralogy of the core YRD-1101 of the Yellow River Delta: Implications for sediment origin and environmental evolution during the last ~1.9Myr

Author:
Liu, Jian; Zhang, Junqiang; Miao, Xiaodong; Xu, Shujian; Wang, Hongxia
Source:
Quaternary international 2020 v.537 pp. 79-87
ISSN:
1040-6182
Subject:
mineral content; minerals,   etc   ; Pleistocene epoch; coasts; river deltas; rivers; silt; Yellow River; Yellow Sea;     Show all 9 Subjects
Abstract:
... In this study, we report the high-resolution heavy mineral records from a 200.30 m long borehole (YRD-1101) on the northern coast of modern Yellow River delta (YRD), covering the last ~1.90Myr. The results show that the heavy mineral assemblages are dominated by epidote, followed by hornblende, garnet and hematite-limonite. In the Yellow River (YR) sediments, the content of hornblende is higher th ...
DOI:
10.1016/j.quaint.2019.12.025

7. Exploration: Safe and clean mining on Earth and asteroids

Author:
Dong, Longjun; Sun, Daoyuan; Shu, Weiwei; Li, Xibing
Source:
Journal of cleaner production 2020 v.257 pp. 120899
ISSN:
0959-6526
Subject:
mineral resources,   etc   ; accidents; cutting; disasters; sustainable development; underground mining;     Show all 6 Subjects
Abstract:
... The shallow mineral resources tend to run out in the near future. Meanwhile, numerous catastrophic safety accidents have been induced and serious environmental damage has been caused due to the long-term predatory mining. In this paper, we explored the safe and clean mining on Earth and asteroids by integrating safety and cleanliness into the whole process of mining production. As for the safe and ...
DOI:
10.1016/j.jclepro.2020.120899

8. Exploring environmental efficiency of the European agricultural sector in the use of mineral fertilizers

Author:
Expósito, Alfonso; Velasco, Francisco
Source:
Journal of cleaner production 2020 v.253 pp. 119971
ISSN:
0959-6526
Subject:
mineral fertilizers,   etc   ; agricultural industry; Denmark; Netherlands; Sweden; United Kingdom;     Show all 6 Subjects
Abstract:
... This study analyzes the environmental efficiency of the agricultural sector regarding the use of mineral fertilizers in the period 2001–2012 for a group of European countries. Specifically, efficiency is assessed through a dynamic Data Envelopment Analysis methodology. This method aims to analyze temporal efficiency changes through the estimation of Malmquist indexes with increasing and decreasing ...
DOI:
10.1016/j.jclepro.2020.119971

9. A review of granular flow in screw feeders and conveyors

Author:
Minglani, Dheeraj; Sharma, Abhishek; Pandey, Harsh; Dayal, Ram; Joshi, Jyeshtharaj B.; Subramaniam, Shankar
Source:
Powder technology 2020 v.366 pp. 369-381
ISSN:
0032-5910
Subject:
minerals,   etc   ; cement; conveyors; drugs; food processing; industry; mixing; pigments; plastics;     Show all 9 Subjects
Abstract:
... Screw feeders and conveyors are mainly used in industries like minerals, agriculture, chemicals, pharmaceuticals, pigments, plastics, cement, sands, and food processing for transporting and mixing the granular materials. The system looks mechanically simple but the physics of particle transport in the system is complex; problems like bridging and blockage may be observed in the operation. A compre ...
DOI:
10.1016/j.powtec.2020.02.066

10. Metallic encounters in the Balearic Islands: An approach to Western Mediterranean trade dynamics in the ‘global’ Late Bronze Age

Author:
Sureda, Pau
Source:
Quaternary international 2020
ISSN:
1040-6182
Subject:
mineral resources,   etc   ; alloys; copper; islands; occupations; trade; Balearic Islands; Spain;     Show all 8 Subjects
Abstract:
... The Ibiza and Formentera islands (Pityusic Islands, Balearic Archipelago, Spain) were colonised by continental Bell Beaker communities. These islands have no mineral resources for producing copper or tin-bronze objects locally, so their metals are a good indication of Western Mediterranean trade dynamics. During the first centuries of occupation (ca. 2100-1400 cal BC), they remained almost isolate ...
DOI:
10.1016/j.quaint.2020.04.001

11. Fines isolated from waste concrete as a new material for the treatment of phosphorus wastewater

Author:
Liu, Dongsheng; Zhu, Hanzhen; Wu, Kangming; Zhao, Xiaohui; Wang, Fu; Liao, Qilong
Source:
Environmental science and pollution research international 2020 v.27 no.11 pp. 12539-12549
ISSN:
0944-1344
Subject:
minerals,   etc   ; calcium; cement; concrete; hydrolysis; phosphates; phosphorus; recycling; wastewater;     Show all 9 Subjects
Abstract:
... Waste concrete is a key component of construction and demolition (C&D) waste produced in billions of tons. Exploring new technology for recycling waste concrete has become a global concern. Meanwhile, phosphorus (P) removal from wastewater consumes lots of natural minerals, leading to a heavy burden on the environment. In this study, the cement paste powder (HCPP) was used to remove phosphorus fro ...
DOI:
10.1007/s11356-020-07850-0

12. Micro-X-ray diffraction and chemical mapping of aged interfaces between cement pastes and Opalinus Clay

Author:
Bernard, Ellina; Jenni, Andreas; Fisch, Martin; Grolimund, Daniel; Mäder, Urs
Source:
Applied geochemistry 2020 v.115 pp. 104538
ISSN:
0883-2927
Subject:
clay minerals,   etc   ; calcite; cement; geochemistry; models; pastes; radioactive waste; Switzerland;     Show all 8 Subjects
Abstract:
... The safety of a geological repository designed for deep storage of nuclear waste rests on the long-lived isolation properties of the geological environment and the engineered barrier system. To study the chemical and physical behaviour of cementitious/clayey interfaces, such interfaces have been collected during repeat sampling campaigns of the CI Experiment (Cement-Clay Interaction Experiment) at ...
DOI:
10.1016/j.apgeochem.2020.104538

13. Mechanism of microbial dissolution and oxidation of antimony in stibnite under ambient conditions

Author:
Loni, Prakash C.; Wu, Mengxiaojun; Wang, Weiqi; Wang, Hongmei; Ma, Liyuan; Liu, Chaoyang; Song, Yuyang; H Tuovinen, Olli
Source:
Journal of hazardous materials 2020 v.385 pp. 121561
ISSN:
0304-3894
Subject:
sulfide minerals,   etc   ; antimony; biodegradation; environmental factors; mining; oxidation; rocks;     Show all 7 Subjects
Abstract:
... In this study, we demonstrate that a bacterial isolate Paraccocus versutus XT0.6 from the Xikuangshan antimony mine, the world largest antimony deposit, is capable of stibnite dissolution, oxidation of Sb(III), and formation of secondary Sb(V) bearing mineral. The isolate could oxidize dissolved Sb(III) aerobically and anaerobically. It was able to dissolve Sb(III) in solid minerals, which was sub ...
DOI:
10.1016/j.jhazmat.2019.121561

14. High-temperature overprint in (U)HPM rocks exhumed from subduction zones; A product of isothermal decompression or a consequence of slab break-off (slab rollback)?

Author:
Faryad, S.W.; Cuthbert, S.J.
Source:
Earth-science reviews 2020 v.202 pp. 103108
ISSN:
0012-8252
Subject:
minerals,   etc   ; delamination; geophysics; gneiss; heat; landscapes; mathematical models; subduction; zoning;     Show all 9 Subjects
Abstract:
... This paper presents and discusses petrological observations from high- to ultrahigh-pressure (U)HP metamorphic terrains in relation to existing geophysical and numerical models for subduction and exhumation processes in orogenic belts. The interpretations are mostly based on observations from gneiss terrains bearing abundant bodies mafic (meta-)eclogite and ultramafic garnet peridotite and pyroxen ...
DOI:
10.1016/j.earscirev.2020.103108

15. Role of Gas Coal in Directional Regulation of Sulfur during Coal-Blending Coking of High Organic-Sulfur Coking Coal

Author:
Shen, Yanfeng; Wang, Meijun; Wu, Yucheng; Hu, Yongfeng; Kong, Jiao; Duan, Xiaobao; Wang, Jiancheng; Chang, Liping; Bao, Weiren
Source:
Energy & fuels 2020 v.34 no.3 pp. 2757-2764
ISSN:
1520-5029
Subject:
minerals,   etc   ; coal; free radicals; hydrogen; ovens; prices; pyrolysis; sulfur;     Show all 8 Subjects
Abstract:
... A high organic-sulfur coking coal and two high-volatile gas coals were selected to partially replace a low-sulfur coking coal in an industrial coal blend. The effects of various coal properties on directional regulation of sulfur during coal blend pyrolysis were investigated by a lab-scale fixed-bed reactor, and the coke quality indices were evaluated by a 10 kg-scale coke oven. After adding gas c ...
DOI:
10.1021/acs.energyfuels.9b03737

16. The link between particle size and froth stability - Implications for reprocessing of flotation tailings

Author:
Mackay, I.; Videla, A.R.; Brito-Parada, P.R.
Source:
Journal of cleaner production 2020 v.242 pp. 118436
ISSN:
0959-6526
Subject:
minerals,   etc   ; copper; industry; mine tailings; particle size; particle size distribution;     Show all 6 Subjects
Abstract:
... Historic tailings dams can often be considered as valuable mineral reserves due to the declining head grades of primary deposits. The reprocessing of such material is of great interest to the minerals processing industry, not only from an economic point of view, but also from an environmental one. However, tailings material is generally comprised of fine particles, which poses a challenge for its ...
DOI:
10.1016/j.jclepro.2019.118436

17. Determination of the Mineral Composition of Human Saliva by Microplasma Atomic Emission Spectroscopy

Author:
Zhirkov, A. A.; Yagov, V. V.; Antonenko, A. A.; Korotkov, A. S.; Zuev, B. K.
Source:
Journal of analytical chemistry 2020 v.75 no.1 pp. 63-66
ISSN:
1061-9348
Subject:
mineral content,   etc   ; atomic absorption spectrometry; atomization; humans; saliva;     Show all 5 Subjects
Abstract:
... A procedure is proposed for determining the macroelemental composition of saliva by the atomic emission spectrometry with a drop-spark discharge as a method of atomization and excitation. The prospects of using such a source and the potential of the device based on it in clinical diagnosis are discussed. ...
DOI:
10.1134/S1061934820010177

18. Transformation and toxicity of environmental contaminants as influenced by Fe containing clay minerals: a review

Author:
Wang, Yi; Jin, Xin; Peng, Anping; Gu, Cheng
Source:
Bulletin of environmental contamination and toxicology 2020 v.104 no.1 pp. 8-14
ISSN:
0007-4861
Subject:
clay minerals,   etc   ; clay; crystal structure; iron; pollution; sediments; soil; toxicity;     Show all 8 Subjects
Abstract:
... Clay minerals are ubiquitous in soil and sediments, and play important roles in environmental processes. Virtually all clay minerals contain some Fe, either in the crystal structure or adsorbed at the surface of the clay minerals, which could promote many reactions on the clay minerals. The interaction between Fe containing clay mineral and its surrounding contaminants would greatly affect the tra ...
DOI:
10.1007/s00128-019-02747-2

19. Does ‘activating’ nuts affect nutrient bioavailability?

Author:
Kumari, Shivani; Gray, Andrew R.; Webster, Kirsten; Bailey, Karl; Reid, Malcolm; Kelvin, Kylie Anne Han; Tey, Siew Ling; Chisholm, Alexandra; Brown, Rachel C.
Source:
Food chemistry 2020 v.319 pp. 126529
ISSN:
0308-8146
Subject:
mineral content; minerals,   etc   ; almonds; atomic absorption spectrometry; bioavailability; grains; hazelnuts; high performance liquid chromatography; peanuts; phytic acid; soaking; walnuts;     Show all 12 Subjects
Abstract:
... Claims in the lay literature suggest soaking nuts enhances mineral bioavailability. Research on legumes and grains indicate soaking reduces phytate levels, however, there is no evidence to support or refute these claims for nuts. We assessed the effects of different soaking regimes on phytate and mineral concentrations of whole and chopped almonds, hazelnuts, peanuts, and walnuts. The treatments w ...
DOI:
10.1016/j.foodchem.2020.126529

20. Effective bioleaching of low-grade copper ores: Insights from microbial cross experiments

Author:
Wang, Xingjie; Ma, Liyuan; Wu, Jiangjun; Xiao, Yunhua; Tao, Jiemeng; Liu, Xueduan
Source:
Bioresource technology 2020 v.308 pp. 123273
ISSN:
0960-8524
Subject:
mineral content; minerals,   etc   ; Acidithiobacillus ferrooxidans; Leptospirillum ferriphilum; bioleaching; community structure; copper; domestication; habitats; leachates; leaching; microorganisms; pH; redox potential; sulfides;     Show all 15 Subjects
Abstract:
... The interaction between microorganisms and minerals was a hot topic to reveal the transformation of key elements that affecting bioleaching efficiency. Three typical low-grade copper ores, the main copper-bearing components of which were primary sulfide, secondary sulfide and high-oxidative sulfide copper, were obtained from Dexing, Zijinshan and Luanshya copper mine, respectively. Meanwhile, six ...
DOI:
10.1016/j.biortech.2020.123273