Chemisorption of Oxygen on Activated Charcoal and Sorption of Acids and Bases

Puri, Balwant Rai; Singh, Dalip; Nath, Jayashree; Sharma, Lech

doi:10.1021/ie50583a046

Cited by 42 publications

(21 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Activation can occur by simply cooling the biochar with water or exposing the hot biochar to atmospheric oxygen during cooling. Surface oxidation of BC, even at ambient conditions, alters surface chemical groups (Puri et al, 1958; Allardice, 1966; Cheng et al, 2006), which correspondingly influences the potential interactions with soil nutrient cycles (Bohn et al, 1985). Traditional soil kiln charcoal can be oxidized due to the exposure of the hot biochar to atmospheric air.…”

Section: Biochar Impacts On Agronomic Yieldsmentioning

confidence: 99%

“…Biochar‐induced yield improvements are further complicated by the occasional delayed response, with negative or no impact in the initial year followed by yield increases of varying degrees in subsequent years (Kulmatiski and Beard, 2006; Gaskin et al, 2010; Major et al, 2010b). These delayed responses are hypothesized due to aging of the biochar (e.g., oxidation or other chemical alteration) (Puri et al, 1958; Allardice, 1966; Cheng et al, 2006; Singh et al, 2010b). Chemical or thermal biochar activation drastically alters the surface chemistry (Azargohar and Dalai, 2006, 2008; Nuithitikul et al, 2010).…”

Section: Biochar Impacts On Agronomic Yieldsmentioning

confidence: 99%

“…Chemical or thermal biochar activation drastically alters the surface chemistry (Azargohar and Dalai, 2006, 2008; Nuithitikul et al, 2010). Chemisorption of oxygen by biochar also alters the surface chemistry (Puri et al, 1958) and microbial degradability (Cheng et al, 2008), which could affect biochar nutrient availability. These abiotic chemisorption reactions occur at ambient conditions (Itay et al, 1989), which have only received limited attention in the biochar literature (Cheng et al, 2006; Spokas et al, 2009; Zimmerman, 2010; Jones et al, 2011).…”

Section: Biochar Impacts On Agronomic Yieldsmentioning

confidence: 99%

See 2 more Smart Citations

Biochar: A Synthesis of Its Agronomic Impact beyond Carbon Sequestration

Spokas

Cantrell²,

Novak³

et al. 2012

J. Environ. Qual.

829

507

View full text Add to dashboard Cite

Biochar has been heralded as an amendment to revitalize degraded soils, improve soil carbon sequestration, increase agronomic productivity, and enter into future carbon trading markets. However, scientific and economic technicalties may limit the ability of biochar to consistently deliver on these expectations. Past research has demonstrated that biochar is part of the black carbon continuum with variable properties due to the net result of production (e.g., feedstock and pyrolysis conditions) and postproduction factors (storage or activation). Therefore, biochar is not a single entity but rather spans a wide range of black carbon forms. Biochar is black carbon, but not all black carbon is biochar. Agronomic benefits arising from biochar additions to degraded soils have been emphasized, but negligible and negative agronomic effects have also been reported. Fifty percent of the reviewed studies reported yield increases after black carbon or biochar additions, with the remainder of the studies reporting alarming decreases to no significant differences. Hardwood biochar (black carbon) produced by traditional methods (kilns or soil pits) possessed the most consistent yield increases when added to soils. The universality of this conclusion requires further evaluation due to the highly skewed feedstock preferences within existing studies. With global population expanding while the amount of arable land remains limited, restoring soil quality to nonproductive soils could be key to meeting future global food production, food security, and energy supplies; biochar may play a role in this endeavor. Biochar economics are often marginally viable and are tightly tied to the assumed duration of agronomic benefits. Further research is needed to determine the conditions under which biochar can provide economic and agronomic benefits and to elucidate the fundamental mechanisms responsible for these benefits.

show abstract

Section: Biochar Impacts On Agronomic Yieldsmentioning

confidence: 99%

Section: Biochar Impacts On Agronomic Yieldsmentioning

confidence: 99%

Section: Biochar Impacts On Agronomic Yieldsmentioning

confidence: 99%

See 1 more Smart Citation

Biochar: A Synthesis of Its Agronomic Impact beyond Carbon Sequestration

Spokas

Cantrell²,

Novak³

et al. 2012

J. Environ. Qual.

829

507

View full text Add to dashboard Cite

show abstract

“…Puri sa saradnicima [31] prilikom ispitivanja hemisorpcije vodonika na aktivnom uglju nakon tretiranja površine kiselinama i bazama, primetio je da se koncentracija baznih površinskih mesta smanjuje sa oksidacijom površine i fomiranjem kiselih grupa na površini [31]. U mehanohemijski modifikovanoj tkanini dolazi do porasta broja i kiselih i baznih grupa, samo je zavisno od primenjene atmosfere mlevenja odnos tih promena broja kiselih i baznih grupa različit.…”

Section: Tabela 1 Funkcionalne Grupe Na Površini Ugljenične Tkanineunclassified

Determination of surface functional groups on mechanochemically activated carbon cloth by Boehm method

Đukić¹,

Vukelić²,

Mamula-Paskaš³

et al. 2014

Tehnika

View full text Add to dashboard Cite

“…On the other hand, Bruun and EL-Zehery (2012) found an insignificant increase in laboratory C mineralization of uncharred barley straw in the presence of fresh barley straw-derived biochar (0.15 % w/w), and Zavalloni et al (2011) also observed no significant difference in the degradation of wheat straw residues in the presence of 5 % hardwood biochar. It is already known that biochar's surface chemistry and reactivity changes with time, largely believed due to the reactivity to oxygen (Puri et al, 1958) and water (Pierce et al, 1951) at ambient conditions. These differences in surface and bulk chemistries can lead to various responses in microbial mineralization dynamics following biochar additions Cely et al, 2014), particularly since the term "biochar" does not contain any information on the actual chemical composition of the material (Spokas et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Crop residue decomposition in Minnesota biochar-amended plots

Weyers

Spokas

2014

Solid Earth

View full text Add to dashboard Cite

Abstract. Impacts of biochar application at laboratory scales are routinely studied, but impacts of biochar application on decomposition of crop residues at field scales have not been widely addressed. The priming or hindrance of crop residue decomposition could have a cascading impact on soil processes, particularly those influencing nutrient availability. Our objectives were to evaluate biochar effects on field decomposition of crop residue, using plots that were amended with biochars made from different plant-based feedstocks and pyrolysis platforms in the fall of 2008. Litterbags containing wheat straw material were buried in July of 2011 below the soil surface in a continuous-corn cropped field in plots that had received one of seven different biochar amendments or a uncharred wood-pellet amendment 2.5 yr prior to start of this study. Litterbags were collected over the course of 14 weeks. Microbial biomass was assessed in treatment plots the previous fall. Though first-order decomposition rate constants were positively correlated to microbial biomass, neither parameter was statistically affected by biochar or wood-pellet treatments. The findings indicated only a residual of potentially positive and negative initial impacts of biochars on residue decomposition, which fit in line with established feedstock and pyrolysis influences. Overall, these findings indicate that no significant alteration in the microbial dynamics of the soil decomposer communities occurred as a consequence of the application of plant-based biochars evaluated here.

show abstract

Chemisorption of Oxygen on Activated Charcoal and Sorption of Acids and Bases

Cited by 42 publications

References 4 publications

Biochar: A Synthesis of Its Agronomic Impact beyond Carbon Sequestration

Biochar: A Synthesis of Its Agronomic Impact beyond Carbon Sequestration

Determination of surface functional groups on mechanochemically activated carbon cloth by Boehm method

Crop residue decomposition in Minnesota biochar-amended plots

Contact Info

Product

Resources

About