| View Larger Image | Lignin from rice straw Kraft pulping: Effects on soil aggregation and chemical properties [An article from: Bioresource Technology] | Digitalby C. Xiao (Author), R. Bolton (Author), W.L. Pan (Author)
| List Price: | $10.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Elsevier | | Publication Date: | May 01, 2007 |
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Product Description
This digital document is a journal article from Bioresource Technology, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: Lignin contained in pulping liquor that is generated during the pulping process for papermaking is a disposal problem for the pulp and paper industry. Separating lignin and other organic components from pulping liquor with inorganic acids may improve its applicability to fields as a beneficial soil amendment while offering a potential disposal alternative. Sulfuric acid-precipitated lignin from rice straw pulping liquor applied at rates of 1.67 and 3.34gCkg^-^1 soil was incubated to evaluate its effects on soil properties over 8weeks of incubation. Addition of this acid-precipitated lignin at these rates decreased soil pH by 0.24-0.53units over 8weeks of incubation, suggesting that this sulfuric acid-precipitated lignin from pulping liquor may have potential as a soil acidifying agent. Soil electrical conductivity (EC) only increased by up to 0.36dSm^-^1, but highest EC levels were less than 4dSm^-^1, indicating that lignin applied at both rates would not cause salinity problems. Application of this lignin increased soil organic C by 1.46 and 3.13gCkg^-^1, and total soil N by 0.07 and 0.17gNkg^-^1 over the incubation period. Lignin improved the macroaggregation of >2mm size fraction, and increased wet microaggregate stability of >2mm and 0.5-0.25mm aggregates compared to a nonamended control. The results of this study suggest that this acid-precipitated lignin from pulping liquor may have potential as a beneficial soil amendment. |
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