Cu(II) removal using green adsorbents: kinetic modeling and plant scale-up design

Abstract

Cu(II) adsorption in continuous column using green adsorbents like peanut and almond shell was investigated. Fourier transform infrared (FTIR) spectroscopy, Brunaer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), and Point of Zero charge (pH_pzc) determination have been used for characterization of the adsorbents. Experiments were conducted at various operating conditions to calculate the adsorption capacity of the adsorbents. Adsorption studies signify that both the adsorbents have good adsorptive capacity for Cu(II) ion. Equilibrium of adsorption was described using Langmuir isotherm and the highest q_max value for both the adsorbent were obtained at an operating condition of 20 ml/min flow rate, 15 mg/L influent Cu(II) concentration, and 7 cm bed depth. Regeneration of both the adsorbents suggests that these adsorbents can be used several times for Cu(II) removal. Seven different kinetic models were tested among which the modified dose response model was fitted well for peanut shell and the Thomas model was fitted well for almond shell. These fitted models were further used for scale-up design. Regeneration studies show that peanut shell and almond shell are useful up to the fifth adsorption cycle. Application of these adsorbents with industrial effluent was also reported. This study reveals that peanut and almond shells can be used for Cu(II) removal for industrial wastewater.

Erythrodermic psoriasis and secukinumab: Our clinical experience

Dermatologic Therapy, EarlyView.

Nonspecific erythema and scaling of the palms in a 53‐year‐old woman

JDDG: Journal der Deutschen Dermatologischen Gesellschaft, EarlyView.

Cutaneous chromomycosis caused by Arthrinium arundinis

JDDG: Journal der Deutschen Dermatologischen Gesellschaft, EarlyView.

Primary cutaneous ganglioneuroma: anatomoclinical study of 4 cases with focus on Merkel cells

Journal of Cutaneous Pathology, EarlyView.

Correction to: Flavonoid quercetin–methotrexate combination inhibits inflammatory mediators and matrix metalloproteinase expression, providing protection to joints in collagen-induced arthritis

The original article can be found online.

Functional expansion pharyngoplasty: Technical update by unidirectional barbed sutures

Clinical Otolaryngology, EarlyView.

Associations of chronic urticaria with atopic and autoimmune comorbidities: a nationwide population‐based study

International Journal of Dermatology, EarlyView.

Tackling scabies: novel agents for a neglected disease

International Journal of Dermatology, EarlyView.

Medical comorbidities in patients with lichen planopilaris, a retrospective case–control study

International Journal of Dermatology, EarlyView.

Treatment of auricular keloids by triple combination therapy: Surgical excision, platelet‐rich plasma, and cryosurgery

Journal of Cosmetic Dermatology, EarlyView.

An evaluation of the antiaging properties of strawberry hydrolysate treatment enriched with L‐ascorbic acid applied with microneedle mesotherapy

Journal of Cosmetic Dermatology, EarlyView.

A single‐center, pilot study evaluating a novel TriHex peptide‐ and botanical‐containing eye treatment compared to baseline

Journal of Cosmetic Dermatology, EarlyView.

Efficacy and safety of retinaldehyde 0.1% and 0.05% creams used to treat photoaged skin: A randomized double‐blind controlled trial

Journal of Cosmetic Dermatology, EarlyView.

Development of QSAR model for predicting the inclusion constants of organic chemicals with α -cyclodextrin

Abstract

Solubility is a crucial limiting factor in pharmaceutical research and contaminated site remediation. Cyclodextrin, with its structure of hydrophilic exterior and hydrophobic cavity, has a potential ability to enhance the hydrophobic chemical's solubility through the formation of host–guest complex. The stability of host–guest complex is often quantified by the inclusion constant. In this study, the logarithm of 1:1 α-cyclodextrin inclusion constants (log K_α ) for 195 organic chemicals was collected. With this parameter as the endpoint, a quantitative structure–activity relationship (QSAR) model was developed using DRAGON descriptors and stepwise multiple linear regression analysis. The model statistics parameters indicated that the established model had a good determination coefficient of 0.857, a high cross-validation coefficient of 0.835, a low root mean square error of 0.380, together with the acceptable results of external validation, which indicate a satisfactory goodness-of-fit, robustness, and predictive ability of the model. Based on the screened eight descriptors, we propose an appropriate mechanism interpretation for the inclusion interaction. Additionally, the applicability domain of the current model was characterized by the Euclidean distance-based method and Williams plot, and results indicated that the model covered a large number of structurally diverse chemicals belonging to 13 different classes. Comparing with the previous reported models, this model has obvious advantages with a larger dataset, a higher value of correlation coefficient, and a wider application domain.

Effects of different vermicompost extracts of palm oil mill effluent and palm-pressed fiber mixture on seed germination of mung bean and its relative toxicity

Abstract

Several treatment technologies are available for the treatment of palm oil mill wastes. Vermicomposting is widely recognized as efficient, eco-friendly methods for converting organic waste materials to valuable products. This study evaluates the effect of different vermicompost extracts obtained from palm oil mill effluent (POME) and palm-pressed fiber (PPF) mixtures on the germination, growth, relative toxicity, and photosynthetic pigments of mung beans (Vigna radiata) plant. POME contains valuable nutrients and can be used as a liquid fertilizer for fertigation. Mung bean seeds were sown in petri dishes irrigated with different dilutions of vermicomposted POME-PPF extracts, namely 50, 60, and 70% at varying dilutions. Results showed that at lower dilutions, the vermicompost extracts showed favorable effects on seed germination, seedling growth, and total chlorophyll content in mung bean seedlings, but at higher dilutions, they showed inhibitory effects. The carotenoid contents also decreased with increased dilutions of POME-PPF. This study recommends that the extracts could serve as a good source of fertilizer for the germination and growth enhancement of mung bean seedlings at the recommended dilutions.

Survival of patients with early invasive melanoma down-staged under the new 8th AJCC edition

Pharmacy Costs of Specialty Medications for Plaque Psoriasis in the United States

Nocturnal Movements in Children with Atopic Dermatitis have a Timing Pattern: A Case Control Study

Topical Janus Kinase Inhibitors: A Review of Applications in Dermatology

Janus kinase inhibitors (JAKi) have attracted attention for their role in treating inflammatory disorders. This new class of biologics has the potential to significantly impact the field of dermatology, especially with the development of topical formulations.