microbial resistance mechanisms for heavy metals and metalloids

... 78 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL Figure 5.6 Gross primary productivity for each sample location estimated from diurnal oxygen curves, litterfall, and/or ... Press LLC 74 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL measured by the annual litterfall into baskets set above the water (Table 5.2). In a fully developed forest there ... for the reference forest using an LAI/GPP regression from data on wetland forests in Brown et al. (1984: p. 317). GPP for trees in other locations is a fraction of reference forest GPP based on...

Ngày tải lên: 18/06/2014, 19:20

... nanoparticles 19 2.5 Heavy metals and its pollution 19 2.5.1 Sources of heavy metal pollution and its effects 22 2.6 Cyclodextrin and its classification 29 2.7 Ionic liquids (Ils) and its application ... removal of dye and heavy metals 37 Table 4- 1 Kinetic parameters for the adsorption of As(V) and Cr(VI) ions onto PPhSi-MNPs .97 Table 4- 2 Adsorption isotherm parameters for As(V) and Cr(VI) onto ... (Mitsumori et al 1996), metal recovery and environmental application (Shin et al 2007) 2.5 Heavy metals and its pollution Heavy metals have higher specific gravities and as well as atomic mass The...

Ngày tải lên: 08/09/2015, 19:41

... 1Nanomaterials and NanotechnologyFunctional Oxide Nanomaterials and Nanocomposites for the Removal of Heavy Metals and Dyes Invited Review Article Sarika Singh1, K C Barick2 and D Bahadur1,* ... binary and ternary nanocomposites, for the removal of various toxic metal ions and organic dyes The possible adsorption mechanism and the surface modification of adsorbents for the removal of heavy ... rapidly, efficiently and within a reasonable costs framework Thus, the development of novel nanomaterials with increased affinity, capacity and selectivity for heavy metals and other contaminants...

Ngày tải lên: 04/12/2022, 10:31

... the pseudo-first order and pseudo- second order equations were solved in Origin 6.0 and are shown in Fig 3 c/d (for RhB) and in Fig S6 a-f (SI, for MB, Zn2+, and Cu2+) for the adsorption of the ... efficiency was around 92% for three consecutive circles of adsorption and desorption of MB and the removal efficiency remained at 88% and 87% for the 4th and 5th cycle (Figs S8 and SI) 3.4 Comparison ... (-COOH) (accessible surface loading up to 0.19 mmol.g− 1) for the adsorption of heavy metals ions (Zn2+and Cu2+) and cationic dyes (methylene blue and rhodamine B) The maximum adsorption capacities...

Ngày tải lên: 20/12/2022, 22:05

... pseudo-second order kinetics and agreed with the Langmuir adsorption isotherm The maximum adsorption capacity of heavy metal ions was 14 mg/g for Cu2+, 7 mg/g for Co2+and 6 mg/g for Ni2+and Zn2+indicating ... toxicity to humans, several heavy metals and metalloids are listed in the Agency for Toxic Substances and Disease Registry (ATSDR)’s Substance Priority List (SPL) (Agency for Toxic Substances & ... surface area and ability to adsorb a wide variety of con-taminants from water including heavy metals and dyes (Barakat, 2011), however activated carbon is less efficient for heavy metals Organic...

Ngày tải lên: 01/01/2023, 12:52

... Cu, Cr, and Pb However, high leachabilities under acid conditions of provide a potential opportunity for acid extraction recovery of Ni and Zn from such sludges Keywords Heavy metals and arsenic ... composition and leaching properties (Orescanin et al immo-bilize HMs and As in Portland cement, or bio-stabilization via Understanding chemical and mineralogical properties of in-dustrial sludge and ... has the highest concentrations of As and HMs (Co, Cu, Mo, and Zn) and extremely high concentrations of Cr and Ni (13,208 and 55,732 mg/kg, respectively) and a comparison with published data from...

Ngày tải lên: 18/08/2016, 15:47

... wetland size and vegetation (Xiong et al 2015; Groffman et al 2002; Wardrop and Brooks 1998; Adamus and Brandt 1990; Mitsch and Gosselink 2007) This same dependence on both landscape- and wetland ... laws and regulations and therefore free for general use The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and ... land use i, and LDIi = landscape development intensity coefficient for land use i (Brown and Vivas Fig 1.2 Map of the study sites and the physiographic provinces in which they occur in Ohio and...

Ngày tải lên: 14/05/2018, 12:40

... effective resistance genes for this region and (3) develop breeding strategies for stacking multiple R genes for durable blast resistance in North-East and Eastern India Materials and Methods ... Imam, Dipankar Maiti, N.P Mandal, Chandeshwar Prasadand Mukund Variar 2019 Identification of Broad Spectrum Blast Resistance Genes for North-East and Eastern India using Standard International Blast ... Spectrum Blast Resistance Genes for North-East and Eastern India using Standard International Blast Differential Shamshad Alam 1,2 *, Jahangir Imam, Dipankar Maiti 1 , N.P Mandal 1 , Chandeshwar...

Ngày tải lên: 09/01/2020, 14:56

... and metals Thee metals of Cu, Cd and Pb in molusks are of concerns for community health risk related to daily use as food by local residents The bioaccumulation of metals such as Cu, Zn, As and ... sampling and chemical analysis in the laboratory on 8 trace metals (As, Cd, Cr, Cu, Fe, Ni, Pb and Zn) in environment and in many different species of two mollusk groups, snails and bivalves For metal ... quality of Mekong and Dongnai rivers water on copper toxicity to three tropical species.The Biotic Ligand Model: Technical Basis and Application for Environmental Quality Guidelines for Metals (Cu,...

Ngày tải lên: 23/01/2021, 09:58

... speciation of metals, metalloids, and organometals due to the dependence of their toxicity and mobility on their chemical form This review focuses on the speciationanalysis of metals, metalloids, and organometals ... speciation of trace metalsand metalloids due to the difference in their toxicity and mobility according to their chemical form Some traceelements are required for basic physiological and metabolic processes ... validated by analyzing in CRMs GSBZ50009-88 environmental waters for total Cr and GSBZ50027-94 for Cr(VI), and GBW3209 for As (III) and GBW3210for As(V) It was found that the suggested adsorbent was stable...

Ngày tải lên: 13/01/2022, 00:11

... without (left) and with (right) MC3T3-E1 osteoblast-like cells on enzyme-free GG hydrogels (a and b), hydrogels containing U (c and d) and hydrogels containing U and CA (U + CA, e and f) Cells ... agents and harsh chemical conditions and results in the formation of toxic by-products This in turn necessitates an extensive cleansing strategy before the materials could be harvested for biomedical ... particular, derivatives from microbial sources have emerged as economical and sustainable biomaterials due to their fast and high yielding production pro-cedures Despite these merits, microbial polysaccharides...

Ngày tải lên: 01/01/2023, 12:33

... of 12–330 µ g L −1 for Cd(II), 4–200 µ g L −1 for Pb(II), and 1–275 µ g L −1 for Sn(II) The detection limits for Cd(II), Pb(II), and Sn(II), respectively, were 3.70, 1.35, and 0.45 µ g L −1, ... Sn(II) for hair dye, nail polish, and skin cleanser; Pb(II) > Sn(II) > Cd(II) for shampoo, foundation, gel, and lipstick; Cd(II) > Sn(II) > Pb(II) for powder and eyeliner; and Sn(II) ... values for 20 and 30 µ g L −1 concentrations of Cd(II) were 95.4%–101.2% and 97.5%– 102.7%, respectively The recovery values for 10 and 20 µ g L −1 concentrations of Pb(II) were 96.3%–101.8% and...

Ngày tải lên: 13/01/2022, 00:14

... stand out because of the high con-centrations of Cd, Cu, Mn, Fe (for A17) and Zn (for A18) A21 and A23 form a separate group due to the high content of Al, Fe, Pb, La, Zn and Zr (for A21), and ... in soils for Italian legislation (A: limits for public and private green areas and residential use; B: limits for commercial and industrial use of soil), target and intervention values for Dutch ... tests were performed with HPW and and treated as described for pH measurement was cen-trifuged and the supernatant was separated and analysed The leaching test with acetic acid was performed on a...

Ngày tải lên: 15/03/2014, 23:56

... alternate conformations were observed for residues with longer and flexible side chains, such as Lys The number of alternate conformations was in the Comparison of ligand bound and unliganded PR structures ... occupancies of 0.6 and 0.4 and 0.8 and 0.2 for PR–p6pol-PR and PRV82A–p6pol-PR complexes, respectively As the p6pol-PR analog had 11 residues and extended out of the PR-binding pocket, both N- and C-terminal ... alternate conformations of P1¢ Nle (Fig 6B) Consequently, similar Ki values for PR and PRV82A were observed for both substrate analogs and UIC-94017 (0.3–1.6-fold) and increased by threefold for indinavir...

Ngày tải lên: 30/03/2014, 20:20

... Stasik Center for Environmental Policy and Center for Wetlands Environmental Engineering Sciences University of Florida Gainesville, Florida Heavy Metals in the Environment Using Wetlands for Their ... III LEAD AND WETLANDS IN POLAND Chapter 9 Lead and Zinc Retention in the Biala River Wetland of Poland 97 Wlodzimierz Wójcik and Malgorzata Wójcik Chapter 10 Perspectives on Lead and Zinc ... Krakow, Poland where lead and zinc from mining and processing had been running into grassy wetlands for 400 years Lead and zinc and ecosystem characteristics were studied to understand long-range...

Ngày tải lên: 18/06/2014, 19:20

... by humans for about 4000 years Easily crafted and combined with other metals in alloys (such as pewter), lead was used for food and water containers and for water pipes in ancient Rome and elsewhere ... the global flows and pools of lead Senesi (1992), with spectroscopic methods, found lead and zinc competing for hard ligands Properties of heavy metals were compared (Tessier and Turner, 1995) ... and anorexia (Fergusson, 1990) Lead causes difficulties in pregnancy, high blood pressure, and muscle and joint pain Drinking water quality standards for lead in most developed countries and for...

Ngày tải lên: 18/06/2014, 19:20

... between the mountains and the sea. Freshwater wetlands are along the rivers and saltwater wetlands in the estuaries. As we read in Chapter 1, wetlands filter heavy metals from air and waters, returning ... currents, and waves. These generate rain that combines with land to form ecosystems, soils, and glaciers. The runoff waters carry sediments down rivers to the deltas and wetlands where the sediment and ... hierarchy, and the result was a further concentrating of heavy metals. From cars and industry on the right, the high values of lead recycle as air, liquid, and solid wastes dispersed to waters and land...

Ngày tải lên: 18/06/2014, 19:20

... concentrations of heavy metals and metalloids are kept in balance by a variety of transporters Homeostasis of required metal ions involves pairs of uptake and efflux systems Resistance to toxic metals requires ... interest, therefore, to compare and contrast the mechanisms in eukaryotes with those in prokaryotes Several mechanisms of metalloid resistance in eukaryotes have been proposed For example, arsenic ... pathways for arsenite resistance in Leishmania While amplification of pgpA leads to increased resistance, in cell lines selected for arsenite resistance, disruption of pgpA does not eliminate resistance...

Ngày tải lên: 11/08/2014, 15:20

... Nozzle Forces and Moments 2.4.1 Steel and alloy steel horizontal pumps, and their baseplates, and vertically suspended pumps shall be designed for satisfactory performance when subjected to the forces ... supporting structure, handling during - A P I STD*blO 95 W 0732290 0546325 760 W CENTRIFUGAL PUMPS FOR PETROLEUM, HEAVY DUTY CHEMICAL,GAS INDUSTRY AND SERVICES shipment, and handling and assembly at ... vibration probe and a dial indicator simultane- CENTRIFUGAL FOR PETROLEUM, DUN CHEMICAL, INDUSTRY S R I E PUMPS HEAVY AND GAS E VC S 2-9 Figure 2-6-Coordinate System for the Forces and Moments Table...

Ngày tải lên: 02/04/2014, 15:32

... Đẳng nhiệt hấp phụ F Tốc độ tuyến tính qua cột FL Freundlich FT-IR Phổ hồng ngoại (Fourier Transform Infrared Spectroscopy) HSHP Hiệu suất hấp phụ Ka Hằng số tốc độ mô hình BDST KCN Khu công nghiệp ... xích liên kết với sau: - Liên kết  - glucozit, mắt xích lệch 1800 tạo nên mạch xoắn - Tương tác Vander Wall (d = 0,3 – 0,6 m) - Khi khoảng cách mắt xích nhỏ (0,3m) chúng xuất liên kết hydro, ... thường làm cho dung dịch có độ nhớt cao [1, 103] Chitosan không tan nước tan dễ dung môi hữu acid formic, acid adipic, acid acetic… Dung dịch chitosan có độ nhớt cao, thường chitosan có phân tử...

Ngày tải lên: 18/04/2014, 17:43