Ash pretreatment of pine and biosolids produces biochars with enhanced capacity for organic micropollutant removal from surface water, wastewater, and stormwater

2020 ◽  
Vol 6 (3) ◽  
pp. 635-644
Author(s):  
Matthew J Bentley ◽  
R Scott Summers
Keyword(s):  
Activated Carbon ◽  
Surface Water ◽  
Dichlorophenoxyacetic Acid ◽  
Micropollutant Removal ◽  
2,4 Dichlorophenoxyacetic Acid

An ash pretreatment process was developed and evaluated for improving sorption of 2,4-dichlorophenoxyacetic acid and sulfamethoxazole for pine and biosolids based biochars, making them competitive with commercial activated carbon.

Preparation of mesoporous activated carbon from palm-date pits: optimization study on removal of bentazon, carbofuran, and 2,4-D using response surface methodology

2013 ◽  
Vol 68 (7) ◽  
pp. 1503-1511 ◽  
Author(s):  
J. M. Salman ◽  
F. M. Abid
Keyword(s):  
Activated Carbon ◽  
Influential Factor ◽  
Dichlorophenoxyacetic Acid ◽  
Activation Time ◽  
Carbon Yield ◽  
Activation Temperature ◽  
Variable Parameters ◽  
Carbon Dioxide Co2 ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Date Pits

Palm-date pits were used to prepare activated carbon by physiochemical activation method, which consisted of potassium hydroxide (KOH) treatment and carbon dioxide (CO2) gasification. The effects of variable parameters, activation temperature, activation time and chemical impregnation ratios (KOH: char by weight) on the preparation of activated carbon and for removal of pesticides: bentazon, carbofuran and 2,4-dichlorophenoxyacetic acid (2,4-D) were investigated. Based on the central composite design (CCD), two factor interaction (2FI) and quadratic models were respectively employed to correlate the effect of variable parameters on the preparation of activated carbon used for removal of pesticides with carbon yield. From the analysis of variance (ANOVA), the most influential factor on each experimental design response was identified. The optimum conditions for preparing activated carbon from palm-date pits were found to be: activation temperature of 850 °C, activation time of 3 h and chemical impregnation ratio of 3.75, which resulted in an activated carbon yield of 19.5% and bentazon, carbofuran, and 2,4-D removal of 84, 83, and 93%, respectively.

Adsorption of 2,4-Dichlorophenoxyacetic Acid on Granular Activated Carbon

2020 ◽  
Vol 54 (1) ◽  
pp. 54-60
Author(s):  
S. A. Kulaishin ◽  
M. D. Vedenyapina ◽  
L. R. Sharifullina ◽  
A. L. Lapidus
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Dichlorophenoxyacetic Acid ◽  
2,4 Dichlorophenoxyacetic Acid

scholarly journals DEVELOPMENT OF ACTIVATED CARBON FROM BAMBOO (Bambusa vulgaris) FOR PESTICIDE REMOVAL FROM AQUEOUS SOLUTIONS

CERNE ◽  
2017 ◽  
Vol 23 (1) ◽  
pp. 123-132 ◽  
Author(s):  
Gregório Mateus Santana ◽  
Roberto Carlos Costa Lelis ◽  
Emerson Freitas Jaguaribe ◽  
Rayssa de Medeiros Morais ◽  
Juarez Benigno Paes ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Water Reuse ◽  
Activated Carbons ◽  
Modern Society ◽  
Raw Material ◽  
Point Of Zero Charge ◽  
Dichlorophenoxyacetic Acid ◽  
Bambusa Vulgaris ◽  
2,4 Dichlorophenoxyacetic Acid

ABSTRACT Considering the water scarcity problems facing many countries, the need for water reuse can make activated carbon (AC) an essential product for modern society. In this context, to contribute with better activated carbons that could be used to serve in water treatment, this article discusses these materials production, using bamboo as raw material, and analyses their application effectiveness. The bamboo was collected, transformed into activated carbon, by simultaneous chemical and physical activations, and named H3PO4/H2OAC. The obtained material was characterized by its yield, apparent density, ash content, thermogravimetric analysis, surface area, methylene blue and iodine indexes, pH and point of zero charge analysis, scanning electron microscopy and Boehm titration method. The AC was used as adsorbent for removing the metribuzin, 2,4-dichlorophenoxyacetic acid and furadan pesticides. The H3PO4/H2OAC had a surface area of 1196.30 m².g-1 and the obtained adsorption capacity was elevated for furadan (868.98 mg.g-1), metribuzin (756.47 mg.g-1) and 2,4-dichlorophenoxyacetic acid (274.70 mg.g-1).

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