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Hierarchical porous induced competent removal of low concentration azo dye molecules by generating a leachy crystalline structure H-MIL-53(Fe)

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Chinese Chemical Letters 2020年第10期31卷 2717-2720页

作者： Tao Feng Jean Pierre Bavumiragira mumbi anne wambui Daniel Manaye Kabtamu Krisztina László Ying Wang Fengting Li State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Department of Physical Chemistry and Materials Science Budapest University of Technology and EconomicsH-1521 BudapestHungary

The development in technology of synthetic azo dyes,has led to excessive water resources *** n at lower concentration they can impart the quality of water and human ***,we have developed a novel synthesis strategy via introducing salicylic acid(SA)for the synthesis of a leachy crystalline material H-MIL-53(Fe)with hierarchical pores(HP)and exposed coordination unsaturated sites(CUS),which had higher surface area and larger pore volume than the as synthesized MIL-53(Fe).Due to these characteristics,H-MIL-53(Fe)was competent removal of orange G(OG,one of the frequently used azo dyes)with equilibrium in 300 min and the maximum adsorption capacity of 163.9 mg/*** adsorption mechanism of OG onto H-MIL-53(Fe)was mostly based on electrostatic attraction between CUS of HMIL-53(Fe)along with HP as active species to OG diffusion and *** comparing H-MIL-53(Fe)with other adsorbents for OG adsorption,it is undoubtedly that H-MIL-53(Fe)can be used as a promising adsorbent for OG removal from aqueous solutions.

关键词： H-MIL-53(Fe) Salicylic acid Leachy crystalline Adsorption Orange G removal

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Effects of Organic Substrates on Development and Survival of Blattela germanica for Food and Feed in Kenya

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Open Journal of Animal Sciences 2022年第3期12卷 484-492页

作者： Victor Muhumbwa Ngaira Reuben Oyoo Mosi Caroline Celine wambui Francis Obuoro Wayua Ann mumbi Wachira Department of Plant Animal and Food Sciences Jaramogi Oginga Odinga University of Science and Technology Bondo Kenya Department of Animal & Fisheries Sciences Maseno University Maseno Kenya Non Ruminant Research Institute Kenya Agricultural and Livestock Research Organization Kakamega Kenya

Entomophagy has gained popularity as a novel approach to addressing food and nutrition insecurity, particularly in sub-tropical and tropical countries. Cockroaches, for example, have the potential to alleviate nutritional deficiencies, as well as the erratic supply of protein in feeds. They can also be reared on locally available organic substrates. This study investigated growth performance and survival of german cockroach (Blattella germanica) reared on locally available organic matter substrates as treatments;spent brewers’ grain (Treatment A), Treatment B consisting of (40%: wheat bran: 40% spent brewers’ grain: 20% Caridina nilotica), wheat bran (Treatment C), and C. nilotica (Treatment D) and in a completely randomised design (CRD). Each treatment was replicated four times, while in each replicate 20 - 30 nymphs were reared for forty-two days. Feed intake for all the treatments was not significantly different. There was a significant difference (P 0.05) in mature weight, average daily weight gain, live weight, and survival during rearing period. Cockroach performed well on treatment B and recorded highest mature weight, overall performance index, survival was 90.25 mg, 197.35, 96%. The least perfomance was reported in Treatment C;1.78, 83, 143.17 and 72.5 for average growth rate, survival, overall perfomance and mature weight respectively. B. Based on these findings, a single feed as used in this study was inferior to the composite (Treatment B) in all parameters of growth performance and survival. The composite diet (Treatment B) could be suitable substrate for mass production of B. germanica for feed and food.

关键词： Cockroach Feed Intake Growth Rate

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Antimicrobial Profiles of Selected Gram-Negative Bacteria Recoverable from Sewage and Sludge from Juja and Kibera Informal Settlements of the Larger Nairobi Metropolis

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Advances in Microbiology 2019年第6期9卷 507-524页

作者： John Maina Perpetual Ndung’u anne Muigai Helen Onyango Joel K. Mukaya Susan wambui Terry Judah Joyce Kinyua Joystella Muriuki Lynne Chesenge Lydia Kisoo Rebecca Thuku Boniface Wachira Vincent Bett Thomas Gachuki John Kiiru Jomo Kenyatta University of Agriculture and Technology Juja Kiambu County Central Kenya Kenya Center for Microbiology Research Kenya Medical Research Nairobi Kenya

Africa has experienced rapid urban migration in the past two decades. New informal settlements continue to emerge and expand but the sanitation provision of facilities has not improved at the same pace and this poses a serious health concern to the public especially the urban poor. Open sewage systems and sludge-clogged drainage systems as well as soil contaminated with industrial and domestic wastes are possible sources of germs that probably cause clinical infections and epidemics. In this cross-sectional study, we recorded diverse genera of Gram-negative non-fastidious bacteria that included;Escherichia coli (23%), Klebsiella spp (21%), Enterobacter spp (19%), Citrobacter spp (10%), Pseudomonas aeruginosa (8%), Proteus spp (7%), Salmonella (3%), Yersinia spp (3%), Shigella spp (2%), Morganella morganii (2%), Edwardisella spp (1%), Hafnia spp (1%), Serratia marcesence (0.5%), and Acinetobacter baumannii (0.5%). Most of these isolates were resistant to ampicillin while imipenem and ciprofloxacin were the most effective antimicrobial agents. Resistance combination towards ampicillin, trimethoprim, sulfamethoxazole and streptomycin was also noted in recovered isolates (16%). An overall high antimicrobial resistance was recorded among isolates from slum as compared to those recovered from Juja, a middle-class settlement located at the edge of Nairobi metropolis. The prevalence of isolates with a combined resistance to 3rd generation cephalosporins (cefotaxime, ceftriaxone and ceftazidime), gentamicin and ciprofloxacin was the highest among P. aeruginosa isolates (13%) but none of the Yersinia species and Edwardisella tarda exhibited this resistance. Carriage of blaTEM (52%) was most prevalent in all bacteria species followed by blaCTX-M (20%), blaSHV (18%) while blaOXA (17%) was the least common. The phylogeny analysis revealed significant genetic similarity among strains belonging to E. coli, K. pneumoniae, E. agglomerans and P. mirabilis strains but less relatedness

关键词： Antimicrobial Resistance Multiple-Drug Resistance (MDR) Extended Spectrum β-Lactamases (ESBL) Enterobacteriaceae Sewage and Sludge

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