Incorporation of mineral phosphorus and potassium on leather waste (collagen): A new NcollagenPK-fertilizer with slow liberation

Effect of tannery wastes and biochar on soil chemical and physicochemical properties and growth traits of radish

“…The shoot nitrogen concentration in the TW 2.5 and TW 5 treatments increased by 26 and 43%, respectively compared to the control. Due to the high organic carbon and high nitrogen contents, tannery wastes are a good source of plant nitrogen (Nogueira et al, 2009). Collagen in tannery wastes is considered as a suitable resource for plant nitrogen availability (Lima et al, 2010).…”

Recycling of solid waste rich in organic nitrogen from leather industry: Mineral nutrition of rice plants

“…2a) presented a different morphology from the natural leather (without chromium) related in the literature. The fibrous aspect of the wet blue waste is probably due to the presence of chromium in the leather [7]. It is interesting to observe that after P and K incorporation (Fig.…”

“…These preliminary results suggested that after chromium extraction from wet blue leather waste, the resulting material can be considered as a viable alternative to reduce the use of mineral fertilizers and production costs. It can act as a soil conditioner because of its organic carbon content and mainly as a nitrogen source for plants [7].…”

Synthesis, characterization and application of hydrogel derived from cellulose acetate as a substrate for slow-release NPK fertilizer and water retention in soil

“…While 14 reducing fertilizer application can compromise crop productivity, 15 reducing nutrient losses in fertilizer application by using 16 substrates that perform controlled-release or slow-release while 17 conserving soil moisture is considered a promising alternative 18 [1,2]. 19 According to Carmo et al [3] and Nogueira et al [4] the overuse 20 of mineral fertilizers, mainly fertilizers with nitrogen (ammonium 21 and nitrate), can cause environmental impacts. The mineral 22 fertilizers are inefficient; therefore, it is necessary to apply several 23 times, especially when it comes to highly mobile nutrients such as 24 N and K. Thus, they may be leached into rivers and lakes to cause 25 eutrophication.…”