De-inked paper sludge and mature compost as high-value components of soilless substrate to support tree growth

被引：11

作者：

Vannucchi, Francesca ^{[1
]}

Scartazza, Andrea ^{[1
]}

Scatena, Manuele ^{[1
]}

Rosellini, Irene ^{[1
]}

Tassi, Eliana ^{[1
]}

Cinelli, Fabrizio ^{[2
]}

Bretzel, Francesca ^{[1
]}

机构：

[1] CNR, Res Inst Terr Ecosyst IRET, Via Moruzzi 1, I-56124 Pisa, Italy

[2] Univ Pisa, Dept Engn DESTeC, Pisa, Italy

来源：

JOURNAL OF CLEANER PRODUCTION | 2021年 / 290卷

关键词：

Nitrogen; Phytotoxicity; Photosynthetic efficiency; Recycled paper; Urban trees;

D O I：

10.1016/j.jclepro.2020.125176

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The recycled paper industry produces tons of waste whose disposal is a cost for industry and the environment. This research examines the suitability of de-inked paper sludge (DPS), after pelletization, as a sustainable alternative component to a peat-based growing media, creating ideal root conditions for tree development (e.g. high water storage, low compaction). DPS, tested on Lepidium sativum L. germination, did not show toxicity effects. Three species, Quercus ilex L., Lagerstroemia indica L. and Prunus serrulata "Kanzan", were planted in 40 cm empty set pots filled with a control (peat, pumice and zeolite) and the experimental substrate (compost, DPS pellets, pumice and zeolite). After two years in the nursery, the trees were planted in situ. The physical and chemical properties of substrates were analyzed. Plant morphological and physiological parameters were monitored: trunk diameter, leaf dry matter, leaf nitrogen, chlorophyll, and photosynthetic efficiency. The new substrate showed higher C-org (+135%), total N (+73%) and easily available water (+19%), compared to the control substrate used in the nursery. In this new substrate, the trees showed similar radial growth values to the control in the nursery and after transplanting in situ improved their photosynthetic performance in terms of quantum yield of photosystem II (+36%, and +29% in P. serrulata and L. indica, respectively) and electron transport rate (+39%, +25%, and +32% in P. serrulata, Q. ilex and L. indica, respectively). Pelletization represents an attractive amendment for growing media, which enhances the plant's physiological health status. This study proposes alternative recovery methods for paper industry waste with low environmental impact. As the process is developed locally, it should also contribute to reducing energy-related CO2 emissions from transport. Pelletization represents an attractive novelty in the use of DPS as amendment for growing media, which enhances the plant's physiological health status. This study proposes alternative recovery methods for paper industry waste with low environmental impact. As the process is developed locally, it should also contribute to reducing energy-related CO2 emissions from transport. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：10